00:00:04.120
my name is Arena I'm the CEO Dil martians and I'm super excited for about
00:00:12.120
today's event I don't know why but it just feels overwhelming at the
00:00:17.359
moment I'm gonna say um a few words first of all this I'm I'm so
00:00:24.480
excited about this guys think about it right we had suchal
00:00:32.559
on break and um honestly I just moved to San Francisco in January uh but like the
00:00:39.559
first thing I wanted to do is was this so and you made it happen so I don't
00:00:45.079
know thank you so much super grateful yeah check out this website Ruby conferences uh.org there are more events
00:00:52.800
and new events are coming up and it's a Community Resources re resource so you
00:00:59.199
can contribute if you're organizing something definitely add it there there are more events on the west coast um for
00:01:07.280
example uh rails camp in August where you're supposed to go hiking yeah with
00:01:14.840
Ruby people but yeah we're GNA start in a second um I'll just give
00:01:21.759
you um if like a small piece of information about the stickers that you
00:01:28.360
can get grab over there so the company that I'm the CEO of is called evil
00:01:34.840
martians we are a product development consulting company for uh developer
00:01:39.960
first products we are pretty well known for our open source and our clients some
00:01:45.479
of our clients are on the screen we also build some commercial Open Source Products including image proxy and any
00:01:53.759
cable um and this is just a few of the
00:01:58.960
lugus of our open source projects you can recognize maybe post
00:02:04.680
CSS or uh test Prof U Ruby next many many of the things in um sort of Ruby
00:02:13.040
rails ecosystem and finally um something
00:02:19.120
happened and for some reason this year I'm given a keynote at
00:02:25.120
rails thank you and uh if you guys are uh work for a startup a you know new and
00:02:32.840
growing company built on Ruby I want to talk to you and um this is uh the link
00:02:40.159
where you can sort of schedule 30 minutes with me I'm collecting feedback
00:02:46.000
of like what's missing in the ecosystem what's helping what's useful what's lagging or uh to make to gather all this
00:02:54.920
feedback and Inspire the community to build more and better tools for
00:03:00.800
uh smaller and growing companies you know not just companies like GitHub but thank you
00:03:06.599
GitHub no thank you GitHub for hosting look at this it's amazing I'm yeah GitHub shout out
00:03:20.599
sponsor uh who supported the pizza and I'm gonna give uh the floor to Meredith
00:03:28.760
hello my name is name is Meredith I'm a recruiter for tech systems so I'm not a Ruby on Rails developer um but Tech
00:03:35.959
Systems is a global uh technology services company so we work with a lot of companies here in the Bay Area uh
00:03:43.159
like apple Adobe meta for mostly contract Consulting work um I've been
00:03:48.680
supporting the Ruby unreal space recruiting for the past couple years um
00:03:53.799
so support a ton of projects um over the past couple years in Ruby so would love
00:03:59.159
to connect with you um here is oh switch
00:04:04.519
this slide there we go um so this is a QR code for some of the job applications
00:04:10.120
I'm sure I've connected with some of you already or I've been in your LinkedIn DMS a few times so um we love to connect
00:04:17.639
with you and see how I can help you just in your job search or um if you need help with hiring needs Tech Systems
00:04:23.840
would love to to help you out too um one of my sales Partners man is here too so
00:04:29.199
um yeah
00:05:29.759
good stories but just about me um I work here at GitHub uh really happy to have all of
00:05:37.800
you here uh I'm the engineering manager of our Ruby architecture team uh Ruby
00:05:43.479
architecture we're the bridge between github's rails monolith and uh the rails
00:05:49.440
and Ruby core teams so we uh it's a two-way Bridge we do a lot of upstreaming of uh GitHub uh improvements
00:05:58.280
and then we do a lot of down streaming pulling into the GitHub monolith all of the great uh open source stuff that all
00:06:04.600
of you all contribute um I'm also the author of good job which is a
00:06:10.120
multi-threaded postgress based active job backend um does background jobs uh I
00:06:17.199
live in San Francisco and I'm currently fostering two very good cats uh and if
00:06:23.199
you stick around to the end of my presentation you will see a photo of them so that's uh the sweetener so just
00:06:31.800
briefly uh good job it's really good um
00:06:37.199
it's multi-threaded postgress based it does active job it's designed for active
00:06:42.280
job um it's built for rails it's built for postgress uh it has uh chronik
00:06:48.039
recurring jobs it has batches it has concurrency controls and throttling it has a really nice uh web dashboard uh I
00:06:54.960
think it's really good and just to like put it in the context here
00:07:00.400
um like good job comes pretty recently uh I released it in
00:07:07.080
2020 um it's pretty much built for active job like most other things uh
00:07:14.520
existed before rails had its own um adapter for active job and I even spelled it wrong there should be a space
00:07:21.080
between active and job sorry about that uh rails core members uh but yeah so
00:07:27.440
good job um it's pretty contemporary and it's built for rails and sort of like
00:07:32.599
what I'm going to be talking about here tonight is like a lot of some of the stuff that I learned while trying to build
00:07:38.080
it so in good job this is like probably the most popular feature request that I
00:07:45.280
got when I was developing it where people said hey I want to inq active
00:07:51.479
jobs on a recurring basis so that it can be used as a replacement for Kon uh if
00:07:57.319
you're paying attention to solid Q solid Q like just last week they launched recurring jobs um started supporting it
00:08:03.479
which is awesome um good job we've had a little longer but you know um solic Q is
00:08:09.319
great uh so was good job um but this was like how everybody wanted it to work
00:08:14.560
they were like I want to have my job class here where I Define my job and what it does and then I want to be able
00:08:20.159
to have the configuration for it where it's like for the cron I wanted to live
00:08:25.319
with my job and I agree it would be really nice to do it that way and I
00:08:31.200
didn't um the way the good job does it is you have this block of
00:08:38.000
configuration um in like your application RB in rails or a initializer
00:08:43.680
in rails uh but basically like pretty far away from where you're putting your jobs in app jobs um and uh you just have
00:08:52.839
this like block of nested hashes um and you have to like reference your job
00:08:58.760
class um with the string not the constant and then like the configuration
00:09:04.160
just to be really clear the configuration does not live next to the job that is being
00:09:09.480
configured um the way that then like good job works is we have like all of
00:09:14.560
these hooks where after your rails application has initialized we go through that hash um and then we like
00:09:23.480
schedule it so we say Okay an hour from now we're going to run this job and then only then does it look at that string
00:09:31.079
that is the name of your job and then it constanti it and then it performs it
00:09:37.519
later um so it enues the job and a lot of what I'm going to be talking about is
00:09:43.640
like why the heck did I do it this way and not what I think everybody wanted
00:09:48.760
and I agree which would have been super nice which was that way um so here's here's the answer uh we
00:09:57.760
all want rails development to be like really really really fast um and loading
00:10:04.399
files and constants uh you know just to read that little bit of configuration is
00:10:10.720
slow um and I think if you've been in the rails EOS system you've probably
00:10:16.320
heard all about autoloading and zit work uh and I'm not going to talk about how they work there's already a lot of like
00:10:23.000
really good uh articles and talks about how they work under the hood what I want to really talk about is like
00:10:30.360
how to use them in a way that you aren't messing up all of this goodness that they give you which is they make your
00:10:36.079
application boot really really fast in development and just just to be really
00:10:42.279
clear here like I'm talking about the development environment development workflows um so that's like when you
00:10:49.440
start up bin rails s on your laptop or in a GitHub code space um and you like
00:10:56.040
load Local Host 3000 and you click around um that's that's the environment
00:11:01.639
I'm talking about or like if you say bin rails test or bin rspec and you run a
00:11:07.040
test or you say like bin uh rails C rails console and you um open up that
00:11:13.639
like this is talking about development um production is like totally different
00:11:19.200
uh rails will it calls it eager autoload but basically all the stuff that in development that rails tries not to load
00:11:26.440
uh in production rails is like well you're going to need all this anyway so so we'll just load it all at once and so
00:11:32.120
like in your rails configuration that's like cach classes equals true eager load equals true um but I'm not talking about
00:11:38.560
any of that I'm really just like talking about development where um my favorite
00:11:44.240
style of development is where you make a change in the code and then you refresh the web browser and you see what happens
00:11:49.320
and then you change the code again um so this is really like that element of trying to get fast feedback from code
00:11:56.160
changes on your local enel development en so this um is how I think of a rails uh
00:12:06.600
application um so down here over here on the lower left um this is like your
00:12:12.680
framework what I'm calling framework configuration um so those are your rail
00:12:18.600
tie files your engines um active record not active record base which is over on the right
00:12:24.959
but just like active record the the core files for active record the core files for Action controller and action pack um
00:12:32.839
active job uh action text all of those things so that's your framework
00:12:39.199
configuration um you've got your application configuration conveniently in rails that is everything pretty much
00:12:45.959
in config uh config is configuration application configuration uh and then I call it
00:12:53.760
behavior um but like your application behavior is basically everything an app
00:12:59.320
your controllers your helpers your jobs your models maybe you use Services um whatever else is in your app
00:13:06.600
thing uh maybe you have an app lib uh or like if there's stuff in lib where
00:13:12.160
you're autoloading lib which is a new rail 71 feature that they came up with after I wrote a blog post that was
00:13:18.880
called Don't autoload lib and then rails core was like oh we're gonna we're going
00:13:24.000
to make that official um and then uh yeah lastly because The Matrix here um
00:13:30.959
like your framework I call it Behavior I don't know the core classes but it's like the active record based file that
00:13:37.720
the the models in your application inherit from uh so it's like active record base then becomes application
00:13:45.360
record and then becomes like user um inherit from or action controller base
00:13:51.720
or active job base um or the other things that you may inherit from so this
00:13:58.600
is like Matrix that I think of um oh yeah I just talked about that and
00:14:05.639
uh so like the configuration over here is uh required during boot so rails the
00:14:12.519
rails application imagines that you're like you know what any thing that you do in this application and development you
00:14:17.560
run a single test you're going to need all this configuration and framework application configuration framework
00:14:23.199
configuration so it loads all of that everything on the right side with behavior is autoloaded the idea here is
00:14:29.920
that rails is like only load what you need when you need it and what would be the fastest is if it just didn't load
00:14:36.440
any of that at all if you're running a single test unit test for a single active record model you don't need
00:14:43.040
controllers you don't need jobs you don't need helpers you just need to load
00:14:48.120
that thing so the idea with rails is that it's trying to not load all of the stuff over in behavior until you touch
00:14:55.320
it and that is in service of just like you making a SLE web request or running a single test or opening up the console
00:15:03.040
and like doing code reload and trying to make that really
00:15:08.440
fast and so a good application a nice application is going to load in this
00:15:15.279
order it's going to load your framework configuration and then it's going to load your application
00:15:22.199
configuration and some applications that is actually your rails application is now fully booted fully initialized
00:15:29.720
um right just over here on the left hand side um some applications maybe then in
00:15:37.800
order to get like fully initialized they'll have to load some of like active record base um but usually by I'm G to
00:15:45.240
run over here by this line your application should be fully initialized
00:15:51.079
and not have touched any of these and then when you actually load that first web page um in development or you run a
00:15:58.519
unit test it will then reference one of those and they'll get loaded and that code will load so this is this is an
00:16:05.560
ordered application a nice application this is the ideal uh thing that we should be
00:16:11.160
aspiring to because this is the fastest way to load and this is what like like bad
00:16:19.160
applications look like uh all applications are like good applications
00:16:24.319
but these need a little more help um and so in these cases um during application
00:16:33.360
initialization they start referencing uh models or they start
00:16:38.560
referencing controllers and when you reference say the user model the user model inherits from active record base
00:16:46.079
so the user model now has to load active record base um and then also sometimes like you know you may have concerns you
00:16:53.360
have may have modules you may have Mixon that also then load additional stuff and
00:17:00.480
so you just end up with a lot of stuff loaded and it gets hella
00:17:06.000
slow so hey github.com this is where I work um so this was something that I was
00:17:13.280
debugging uh with a colleague a few weeks ago um this colleague is John
00:17:19.280
Hawthorne who actually makes the amazing Vernier uh rail uh Ruby profiler and we
00:17:28.199
discovered that that when booting our github.com monolith we were spending 4
00:17:34.280
seconds and this isn't great we were spending 4 seconds out of like n seconds uh just like loading controllers during
00:17:42.880
application initial initialization during boot um so that was really bad uh
00:17:50.559
if you're just trying to run a unit test as a hubber developer um and you're like
00:17:57.360
unit testing something that is very much not a controller that is 4 seconds the of your life that has been wasted
00:18:04.440
loading controllers that you never need or going to use um and just oh yeah just this
00:18:12.320
command up here I mentioned verer is a great profiler um rails runner puts true
00:18:18.559
is like uh if you've never used rails Runner before it like boots your application and then run some Ruby so
00:18:25.320
this is like the most do nothing thing that this Ruby is doing but it's like just puts true and
00:18:32.039
then it's exiting so like just to be clear like nothing is happening in here
00:18:37.120
and it it's taking n seconds but we could at least cut it back to five seconds which is sort of
00:18:44.919
better so this is just to show like what I ended up doing with my colleague John
00:18:52.360
um is we went into our uh config application RB because once we profiled
00:18:58.080
it and we were like what the heck is loading all this stuff uh and this is like crazy big flame graph so we're like
00:19:04.159
let's just put callar uh in here so this is saying active support on load so when
00:19:09.720
action controller base is loaded we just want to like put the caller and
00:19:14.919
it uh will spit out like 50 lines of
00:19:20.080
like this required this required this required this and um we figured it out
00:19:26.280
and this is just an example of what it was um that we just found an asset path
00:19:32.039
that we were loading action controller base to set the asset host and we fixed it um by doing this active support
00:19:38.799
onload action controller based so basically this code in here doesn't get loaded until action controller base gets
00:19:46.200
loaded which is ideally someone else is loading it and not when we're just
00:19:51.880
trying to put true and exit um those hooks
00:19:59.360
are actually not well documented in rails I think this is the only thing that I will say is not well documented
00:20:04.440
as part of my presentation uh that you just have to kind of go look through the rails codebase to find all of these um
00:20:12.760
if you just search active support run load hooks uh you should go look for
00:20:17.799
that if you're trying to do the thing if you go back and you know take my presentation and you're like I'm going
00:20:23.280
to try this on my own application um you'll likely have to just search though the big ones are action controller base
00:20:29.919
um or active record active record base um most framework files that you may
00:20:36.280
want to load uh they offer these lazy load hooks um and like other gems rails
00:20:43.640
engines they also do that uh I just have an example here of devis um devis has
00:20:49.400
this run load hook this is these are all things where I'm just like you just have to go go look in the code base um for
00:20:57.360
these things um and the idea here is that you only like add these when when
00:21:04.559
the constant is first accessed uh not before so if you if you need
00:21:11.440
to do something like this you're just like don't access it until you need
00:21:18.520
it there's a whole bunch of other stuff that I'm just going to gloss over uh
00:21:23.840
here that are called initialization events um but you can just hook into different part of rails uh
00:21:30.799
initialization but the idea here is that like this pattern of wrapping your code
00:21:37.919
um with these like config before initialize config after initialize to
00:21:43.480
prepare um is like a super common pattern that you hopefully have all over your initializers in your application um
00:21:51.200
because if you don't it's probably loading really slowly uh and I just want to say like
00:21:57.919
this as a problem is super common uh devis is
00:22:03.679
actually not it's not my favorite for doing this um but if you notice like if
00:22:08.760
anyone here has ever used devis uh you put this devis 4 in your routes.rb file
00:22:14.720
it's config config routes RB um and then if you actually follow the code path
00:22:21.360
down into devis eventually gets to a place where it just constanti users so
00:22:28.000
if if your application I'm like you're probably adding at least 100 milliseconds right there as soon as you
00:22:34.559
add devis because it's doing that um and you know I'm trying not to
00:22:42.679
pick on anyone uh rails does this too I made this poll request um where rails
00:22:49.360
has had had a bunch of uh Cycles where
00:22:54.760
like active record would end up loading active job which would end up loading action mailer and um it was not trivial
00:23:03.360
to try to unwind all of these pieces so that um yeah you could do faster unit
00:23:09.520
testing and keep your rails development environment going fast all right um these are just some
00:23:16.840
code examples uh if you are thinking about your application uh that I wanted
00:23:22.039
to just share I'm a big fan of sharing examples so if you're just want to like
00:23:28.720
how fast does my rails application run uh you can just like time bin rails
00:23:34.200
runner puts true um recommend running it twice uh because Boot snap sometimes
00:23:39.760
will cash it so the second time will probably be faster uh just want to
00:23:45.120
really promote uh John Hawthorn's verer profiling uh gem it is like really just
00:23:51.520
really good really really good um further further debugging ideas
00:24:01.120
um again just trying to like I want to show folks I'm like look if this is a problem that you do have in your
00:24:06.200
application like these are some things that you can do there is uh no shame
00:24:11.279
inputs caller uh and just dropping some debugging stuff in there that's how I do
00:24:17.159
it I think I'm a serious developer um even more stuff if you want
00:24:23.400
to hook into zit work um this is a way to do that where you can pull out all of
00:24:29.120
the constants that are being loaded this is just like a script that you're running directly um you can pull out the
00:24:35.039
constants you can initialize the application and then you can go back and look and be like did any autoloaded constants get loaded which ones are they
00:24:42.919
and uh where where did they get called from um and I I ran this today I wanted
00:24:48.840
to make sure everything was working and I discovered that action text actually has a problem so now there's more work
00:24:56.480
to be done uh maybe I'll make a PR in rails but I discovered that action text was like loading content helper when it
00:25:04.200
shouldn't have been according to me all right so I'm going to finish up here um just want to say like you know
00:25:12.760
keep your rails application booting fast in development um GitHub we have like
00:25:18.799
40,000 Ruby files I think was the last time that I counted um we have like 800
00:25:24.120
developers working in that monolith uh it's these things add up milliseconds
00:25:29.600
add up so just keeping it fast I think is really important um don't design
00:25:35.919
interfaces in a way where you're like having to load those constants in order
00:25:41.080
to drop configuration on them or to read configuration into them and like you
00:25:46.559
know really really just don't touch anything in app uh in in your configuration in your initializers um
00:25:53.919
unless you really need to all right so just want to
00:25:59.039
uh the code and examples like if these things are interesting please reach out to me like I would love to make your
00:26:05.159
application faster um the slides are there uh and uh yeah please uh if you
00:26:13.679
have a lead on a home for these two good lads uh this is Cameron and that is
00:26:21.279
Monty which is short for Fairmont uh because we found him hanging around at the Fairmont Hotel uh
00:26:28.840
but they have an Instagram red carpet cats um but yeah if you have a lead on a
00:26:35.120
forever home for these two cats please let me know and if you want to make your rails application you know run faster
00:26:41.080
too uh also like reach out thanks okay you might have seen this
00:26:47.880
sticker over there um it's a any cable any cable is the product that we build me and Vladimir Dean who's the
00:26:55.120
author and um the announcement is about our version
00:27:00.360
1.5 but for those who don't know any cable iser uh was originally built for rails
00:27:06.720
as a drop-in replacement for Action cable it brings two things performance performance and scalability because it's
00:27:13.679
built in in um in go it replaces action cable it replaces all your kind of websocket infrastructure making it super
00:27:20.480
performance super scalable and it also gives you
00:27:25.559
reliability um something like delivery guarantees for web
00:27:31.039
sockets which is not present in other Solutions and also if web when web
00:27:37.320
sockets are not available it kind of falls back to other transport and stuff like that so the KNE
00:27:44.760
relas uh is something pretty cool because any cable used to be like I'd
00:27:50.799
say a little bit more complex on the deployment side because you needed to
00:27:56.080
have essentially three applications rails RPC and anying cable now uh we we can continue
00:28:05.200
simplifying any cable for more use cases now we have a standalone um mode that works for hot
00:28:13.000
wire so if if you just use action cable for hot wire uh you will have a super
00:28:18.159
simple setup uh for any cable um and there there's there's more
00:28:24.679
um uh essentially we provide simple pops up um kind of simple
00:28:32.240
abstraction uh yeah a few more details here but you can go you can find us on
00:28:37.880
GitHub of course and find out more there now adash
00:28:44.799
go ahead and and next up Marco than hi
00:28:50.279
everybody I'm a pundit I'm the executive director of Ruby Central if you know
00:28:56.159
Ruby Central um that great we have two main jobs we good jobs maybe um we put
00:29:03.679
on Rails comp every year and Ruby so all those events are one job and then the
00:29:09.080
other good job that we do is that we keep bundler and ruby gems working uh for all of you all day every day every
00:29:15.720
time you type bundle we make sure it keeps going um I would like to redirect that
00:29:21.840
Applause to all the people who actually do the work but um so that's what we've been up to and want to just say a couple
00:29:29.120
of things about that and um the meetups uh that we' that we've been investing in also so we have undergone so many
00:29:37.559
different changes in the last couple of years with the pandemic and um with
00:29:43.039
absorbing the um the open source work in Ruby jems and bundler and um it's it's
00:29:49.480
been awesome we've changed a lot about our team and the way we're doing events we did for those of you who are at Ruby
00:29:55.240
conf in San Diego uh we added a hack day or Community Day where basically open
00:30:01.559
source maintainers each held a table and you had a chance to pair program with
00:30:06.880
them close a bunch of um open issues things like that uh Gemma from um the
00:30:14.080
Ruby core team closed so many issues that the core team in Japan thought something went wrong and um so that was
00:30:21.760
that was her project and and we're going to do the same thing again at rails comp in Detroit my hometown in May it's May
00:30:29.000
I'm going to say 7th through 9th but all the details are at rails com.org uh
00:30:34.200
tickets are going up in price on April 1 and if uh so make your plans now the
00:30:42.240
flights are actually pretty cheap to Detroit if you haven't been to Detroit ever or recently it's very different
00:30:48.440
than it used to be when I grew up there it's a has a very vibrant art scene and
00:30:53.640
very kind of fancy food scene if that's your thing um there's a lot of really neat things going on so I strongly
00:30:59.840
recommend you check it out if you have any questions about that let me know we're are still just barely under the
00:31:05.639
cut off for sponsorship so if your compan is interested in sponsoring it railson please do let me know I can
00:31:11.360
direct you to the right people Ruby conf will be in Chicago this year in November so that's November 13th through 15 and
00:31:18.720
tickets for that will be on sale soon we have a sign up list for that at rubby com.org and we're also um taking
00:31:25.799
sponsorships for that so the conferences are really exciting and it's a great way to get um get together with rubius from
00:31:32.679
all over the world it's so much fun to see people in person that you only know on the internet just from their little
00:31:38.840
you know tiny circular picture um so definitely uh we'd love to see you in
00:31:44.399
Detroit and Chicago um so on the on the open source side bundler and ruby gems we've been
00:31:50.600
getting a lot of funding from different uh funding Partners to help us primarily
00:31:56.320
on security so for everyone's benefit in our community we're under we're adding a whole bunch of security features uh you
00:32:03.880
may have seen some of the changes and uh we also have thanks to the sponsorship
00:32:09.120
of AWS we have a full-time W2 uh security researcher and residence Samuel
00:32:14.720
giddens who uh is constantly working on security again for everyone's benefit so
00:32:20.760
that's pretty exciting news and I've been with Ruby together and Ruby Central as a board member since 2016 so being
00:32:28.600
able to get people paid to work on open source is is a really um exciting thing
00:32:33.679
for me um we have a lot more stuff coming on the way we have um you can check Ruby central.org and you can see
00:32:41.480
the news and see all the cool stuff that's going on and finally the Meetup scene so we know at Ruby Central as a
00:32:47.960
community nonprofit that the Meetup associations all the local meetups the
00:32:53.320
Ruby user groups across the country and across the world are so critical and they were all really devastated through
00:33:00.600
the pandemic and over the last couple years even before that there hasn't been a ruby San Francisco based Ruby Meetup
00:33:08.320
in a long time since fog City Ruby am I wrong I think that's right um so I'm super super happy that we're all back
00:33:15.519
together and we're starting again Ruby Central is sponsoring the meetup.com monthly SP monthly subscription for um
00:33:24.120
Meetup organizers in the us and our first trial is this one here in San Francisco so if you signed up on
00:33:31.080
meetup.com uh great please do that and if you haven't you can probably find it on meetup.com I am the current organizer
00:33:38.720
I would love lots of help because I have other jobs that I need to be doing so if you want to help organize the next
00:33:44.880
Meetup um please get in touch with me I'll be over there I also have stickers so that's another incentive for for me
00:33:52.279
and uh maybe for those of you who are less socially inclined that say you're a real gem so that's a incentive for you
00:33:59.159
to come chat with me but we're we're also looking for places to host so thank you to GitHub for for hosting here but
00:34:05.840
we're also looking for a host for next month and um speakers any of that so if you want to get involved please do and
00:34:12.679
uh thank you to arena for putting all this together thanks all
00:34:18.960
right hi Marco nice to meet you all if you haven't met please come talk after us after this to me I want to talk about
00:34:26.440
um an hot I've been working on the last few months or even years if you want um
00:34:32.800
so even though most companies are using react and other Frameworks for building
00:34:38.040
their applications and um building their uis there's always been this one other
00:34:43.520
alternative which is the Hotwire kind of way of building apps it's been the kind of fril way to do that for the last
00:34:49.960
decade or so and with rails 71 the all the things got default in rails and
00:34:56.320
there's more and more and iasm in the community to build more features and apps um using it but then again it seems
00:35:05.000
like there's not a lot of resources and how to build stuff really well or how to approach things and how to go about
00:35:10.920
using Hotwire in your rails applications I've been working on a bunch of related projects in the
00:35:17.359
ecosystem but as you know it's a little bit complicated to get started I feel
00:35:22.440
like um so what you want to do with the Hotwire thing is pretty much saying we want to use whatever we have in the back
00:35:28.920
ends and reuse that logic um for building our uis as well without having
00:35:34.800
to duplicate whatever we have on the front end so every where everything kind of
00:35:40.640
stays where it belongs kind of if you like building UPS on the server s side so this is super nice to build that kind
00:35:47.760
of um applications that way and I see a lot of people say that like Hotwire is kind of the way to
00:35:54.560
eliminate all your JavaScript but I feel like that's not the whole um motivation
00:36:00.119
to build ups that way I feel like it's just a way of reducing the amount of
00:36:05.319
JavaScript you have to write yourself and it's not um getting rid of it it's
00:36:10.359
mostly just using the right amount of JavaScript to get your stuff done and what we call this is like Progressive
00:36:16.520
enhancements and both stimulus and turbo make really good use of that it pretty much just means that you use um your
00:36:23.720
default HTML elements but then over time a progressive enance them with more
00:36:28.800
JavaScript and more like um interactive parts and there are some Frameworks to
00:36:35.000
do that like simulus to kind of add more stuff um more interactive stuff to those
00:36:40.359
elements but then again kind of what's lacking in hot wire right now um mostly I feel like it's um the framework
00:36:47.599
specific documentation if you use Hotwire before there's no real guide on how to use it with rails there's some
00:36:54.119
documentation but there's not a lot of it and that's super what missing and bothering me that I wanted to build
00:37:00.200
something for it there's no guides to kind of guide you through how to approach those
00:37:05.520
problems and how to discover what's available for you to use so if you look at the landscape of kind of the um terms
00:37:13.640
that flow around the ecosystem we can see some of them here which is kind of why I wanted to build something to help
00:37:19.720
with this and kind of um motivate people to also contribute and help um improve
00:37:25.240
those documentations that's why I build hot.io it's kind of a website Community Driven
00:37:31.079
to build guides and framework specific documentation to help people that want
00:37:36.440
to use Hotwire in their stack um all of this is not specific to
00:37:41.920
rails you can use this pretty much any um server side framework which is also another reason to build more integrated
00:37:48.599
documentation for other Frameworks as well so I feel like this is kind of the
00:37:55.079
server side the server jav ecosystem for server side
00:38:00.160
applications and we have been building out this ecosystem page where we show all the different projects that are out
00:38:07.280
there so you have an idea what's actually available and what exists but we also have these sections which we
00:38:13.000
call the use case sections that you know what you could do or use Hotwire for and have some guides for them as well and we
00:38:20.280
want to build more Frameworks for for guides for more Frameworks so you can get started in any of the Frameworks in
00:38:26.240
Ruby or in any other language you might be using um and then again there are a lot
00:38:33.520
of other Frameworks are making some use of it right now even in their own official documentation but there's so
00:38:39.319
much more that we could do even like um Ro we see um later how we can integrate
00:38:45.680
um hot in those Frameworks as well so all of this is pretty much based on community content and if you like to
00:38:52.560
improve whatever we have right now I encourage you to help or reach out afterwards so that we can build build
00:38:57.839
more documentation for this I feel like awesome ecosystem of um way of building
00:39:04.240
um R applications so if you have anything written yourself or want to write something in the future we love to
00:39:09.720
feature it here or if you want to write a specific guide for the um website
00:39:14.800
contact to me so we'd love to see your contribution um then another thing I've been working
00:39:21.480
on is the Hotwire Weekly Newsletter which as you my guess comes out every Sunday um so if you want to keep up if
00:39:28.599
is new in the Hotwire lands you can subscribe on hot.io newsletter or check
00:39:34.079
out the socials um online and that's pretty much it from my
00:39:39.560
side yeah thank you I've been building uh infrastructure
00:39:46.640
clouds uh for a long time and if you want you can get these slides at slides.com FDR FDR fora Daniel Robert
00:39:56.200
twice um and I'm founder of UB cloud and what is it it's a a new iaz you can
00:40:04.079
compare it to AWS or gcp or Azure uh it's also an open source R program you
00:40:09.480
can take a look and um it's focused on core products you know 10% of the
00:40:15.520
features 30% of the price right now it's more like 3% of the features and 30% of the price uh but just wait a little
00:40:22.520
while um and it's written in Ruby which uh I didn't really think was interesting but but then when I tell people that
00:40:28.599
they say that's weird um and are you sure you want to do that and um did you learn anything in
00:40:36.680
the last 13 years uh and other things of that nature in fact it's a surpris to me to hear that it's like oh a startup is using
00:40:42.800
Ruby I'm like okay I seem to recall it's a thing people did uh I just never
00:40:48.240
really thought about it um so I've actually written a lot of these systems
00:40:53.839
uh the first one was at the Heroku Department of data which if you use Heroku that's lot of could I wrote uh probably
00:41:00.640
refurnished by now and then um I left and I was said Okay that was a pretty good job so I guess I'll make the same
00:41:07.200
job at cus data where I met my co-founders and that's was a data rousing startup on postgress as well and
00:41:12.280
I think that was the biggest I managed to shrink kind of the improve the conciseness by maybe double uh SI data
00:41:19.400
probably because I knew what I was doing um and then I went to crunchy data which is a really good hosted database
00:41:25.040
product you should use it uh on all three clouds if you have any problems with RDS or
00:41:30.880
similar uh and then eventually one of the co-founders UB Cloud says I have
00:41:36.240
this idea I think You' be good for and I said okay what is it he said I'll let you know in a year I said okay and then
00:41:42.680
uh he said well I think we should make an IAS and that's um now what I'm doing I mean it runs instructions and loads
00:41:49.640
huge huge pages so it's the same as post right I mean that's just same thing um so the background I kind of
00:41:57.000
wanted two things uh one was I wanted to talk about Roa HTP routing uh because I
00:42:02.640
thought that there should be enough code in a code Meetup it just seems very important but then I kind of wanted to
00:42:08.440
address the question I always get which is uh why are you so strange uh because it happens all the
00:42:14.240
time and I was trying to figure out what do Ruby Community people uh think about I went to Reddit and people like is Ruby
00:42:19.880
dying all the time uh I'm like okay not something I was really looking for all right you know um so I was just like
00:42:26.680
what are people thinking about and I kind of thought that my very unusual experience using
00:42:31.880
Ruby uh I don't it's make you feel better or worse but make you feel differently okay so Roa we'll start the
00:42:38.920
specifics uh that's the fun part uh it's a routing tree framework and so what is
00:42:44.760
the routing tree here it's actually just a series of nested blocks and you could
00:42:51.000
see this as an alternative to before filters I think both Sinatra and rails
00:42:57.640
have before filters well you just write code that's the before filter you're
00:43:02.920
like okay you know you basically proceed from top to bottom and when something matches you go on the Block and when it
00:43:09.400
doesn't match you you don't go on the Block so if you want before we'll see an example of this um so let's take uh one
00:43:17.559
example here if we start with a request and it's on item SL whatever and we go into this arm and then it supports types
00:43:26.400
to match each fragment at of time you know between each slashes and here we load an item instance variable which is
00:43:32.480
available to templates and all future code because remember just top to bottom right and so here if it's a get we match
00:43:39.079
gets we're inside this arm here we can render item and if it's a delete we can delete the item this is presuming a
00:43:45.359
somewhat normal you know orm so it runs a delete statement but if it didn't match items at all we can match any
00:43:51.599
string and say hey here's a string you sent me this is uh I hope this conceptually sort of might be seem very
00:43:59.200
simple I would say Jeremy Evans the guy who wrote this use Sinatra for many years and then thought I think there's a
00:44:05.440
way to improve on he didn't I don't know he said this to himself but he just said he started developing Roa and actually
00:44:10.640
my colleagues were saying I wonder why he's doing that could possibly be worth it uh this is what he
00:44:17.440
did but that's a little bit of a toy so I want to kind of show you uh what very
00:44:22.760
framework intensive Roc code looks like uh it's the the conceit is exactly the
00:44:28.200
same you get a request now instead of familiar symbols like maybe on or is
00:44:33.680
where you kind of get the idea and then doget uh we see public and assets and
00:44:40.000
then on web hook that one we saw a little bit before and then this plugin hash branches and then check Cerf very
00:44:45.480
important to check your C surfs uh and then we do some and so you can see here
00:44:50.559
the composition of the framework this is not how most of the code works this is the very top level application where everything comes in and you can infer
00:44:57.599
from this is well the first thing we do is we check for unauthenticated assets like public or
00:45:03.240
assets um web hooks don't have Cerf ramification so we do that uh and then
00:45:08.680
we do Cerf and then we start loading rodo a library by the same guy to um get
00:45:15.200
the current user handle and then we do stuff like um check if they have a member me set load the session and then
00:45:22.079
finally um if you're at the root we don't render we just redirect you to login at root otherwise require
00:45:27.640
education and then we run this H branches thing um so it's all the same conceit
00:45:35.280
but the power of the composition of the framework I think is a little more obvious where uh in a very small amount of code
00:45:42.280
you kind of get all your before filter type stuff um and you can just have branches and just write Reb
00:45:50.000
code uh here's what the leaves of the application looks like this is what most
00:45:55.520
of your code looks like it looks aot lot more like uh the example I showed you
00:46:01.160
the the toy which is actually part of the appeal um but something is interesting here you
00:46:08.480
might notice here and here everything's reopening a single class Clover web we have Clover web and clover API why is it
00:46:15.400
Clover I'll get to that later um and what we do here is there's a
00:46:21.599
thing called hash branch which is a very unusual plugin uh that I think is very important
00:46:28.000
if you're going to use Roa and anything that's even mediumsized and all it does is if you might think to
00:46:34.599
yourself uh G isn't it inefficient if you have you know 50 routes to fail to
00:46:40.119
match 50 routes and then find at the 50th route 51st route that you proceed into the into the uh block and you're
00:46:47.240
right it would be inefficient so uh what you do is you use hash branches which is
00:46:53.040
a little less flexible it just lets you directly when you say not hold the block and then it jump to it and that's
00:46:58.960
exactly what it does it sticks if you look at the source code all it does is take the block sticks it in a hash table and then uh when you see the project
00:47:05.720
fragment it just jumps there so you get o of one dispatch um I would say that's the one
00:47:11.720
weird thing about Roa that and the uh the reopening of classes to organize
00:47:18.040
applications once you know that you pretty much know all the stuff and you could look at the source code uh in UB
00:47:24.240
cloud and if you really were like how you guys actually doing a bunch of stuff um you know in this case we uh this is
00:47:31.720
how we load projects to show your virtual machines and things and you know if it's a get we show you all of your
00:47:37.680
visible projects and uh otherwise uh if it's post we create a project simple as
00:47:43.680
that um so how many times can you reopen and the answer is you could do lots of times uh probably as this product grows
00:47:49.599
I would guess there will be hundreds just I mean we want want to build 10% of the features but that's still a lot of
00:47:55.839
pages um but it's a fair question why do things that way and it's actually just a
00:48:03.839
lot faster um some people who have used Roa I've seen use one Roa app to make
00:48:09.800
zit work work uh and I was a big fan of Zite work in a previous
00:48:16.319
um version of this uh but I was looking
00:48:21.520
into why things were done this way and I realized that re like there's special reloading code that makes has branches
00:48:29.119
extremely I mean it makes it it reloads extremely fast so since we just had a talk about how fast you can it your
00:48:35.559
application uh it really matters for the reloading time he down here uh 50 milliseconds compared to multiple
00:48:42.200
seconds uh and you can see here that Roa in general Jeremy who's also I believe a ruby committer is very aware of the
00:48:48.880
second order effects of what he's doing on Ruby performance so as a result pretty much anything he writes is very
00:48:54.559
fast for the functionality you get here it's cons considerably considerably faster I don't really use Roa because it's fast I was actually okay with
00:49:00.680
Sinatra but it's always nice when things are
00:49:06.640
faster okay does anyone have questions about R Roda did I make it very
00:49:11.960
confusing sh
00:49:18.520
cohort your class iner from R and then you reopen it and it doesn't inherit from Roda like I know it works like
00:49:27.839
well I mean it's really just defining one class in 10 files right because it runs the hash branch block and it just
00:49:34.440
runs it over and over again it does each time you give it kind of its name I mean uh because you know when you
00:49:41.480
reopen classes it's our own application class it's not in Roa but we reopen our own class continuously does that make
00:49:48.119
sense like we have 13 files all of them Define one
00:49:55.400
application so I don't know usually like if I say forance let's say I say user
00:50:00.680
inherit from application record if I reopen user I have to inherit from
00:50:06.559
application recall as well like uh sorry com again no like you know
00:50:13.680
like you you in anyway anyway anyway anyway oh well I mean it ends up being
00:50:19.720
pre repetitive uh it just so happens that for imp Ruby implantation reasons
00:50:25.000
that you can just reload hash branches is very accurately so as it turns out um
00:50:30.359
there's also a project that he writes called rack unrel loader and um it has
00:50:36.160
it gives you more control over the reloading behavior and That's essential to making that work and I actually
00:50:41.559
switched from Zite work to that but it required a little bit of programming for me so anyways this is the weirdest part
00:50:46.839
about Roa I think is larger programs use hash branches uh and open S class over
00:50:52.319
and over again it's a little bit unusual besides that I don't know like once you get used to it there's nothing
00:50:58.040
really I mean I don't know it jumps here and then you can do your code it's fine
00:51:03.880
you know I mean it's kind of in the Sinatra family of design conceits is that does anyone use Sinatra anyone all
00:51:12.160
right great does this look familiar or kind of okay this just tracks at all okay good any other
00:51:21.040
questions it was designed from Sinatra as the base of it must be better than
00:51:26.839
like so it came from someone who liked Sinatra huh bridgs using Roa for their
00:51:33.599
back end oh really yeah think okay it's good right yeah exactly you should
00:51:38.960
consider using it we'll get into why you should consider using it there are besides the sheer expressiveness of it which frankly we barely use because we
00:51:45.319
just kind of do the same thing because that's the good thing you repeat a model that works and is concise okay so why Ruby that's kind of
00:51:52.240
getting into that um so now that we spend some time some code uh as one does
00:51:57.760
uh I want to talk about Ruby uh so personally I haven't ever given a talk at Ruby conference I just kind of used
00:52:04.760
it um I found it practical uh and I always reviewed
00:52:10.440
Alternatives every time I had a new project to write which so far this is the fourth one and nothing looked as
00:52:16.000
practical so I kept writing Ruby um and as was alluding to earlier
00:52:21.119
some people they're surprised they're like you know investors are surprised people who write Ruby are surprised
00:52:26.960
people who don't write Ruby surprisingly or less surprised people write Ruby have a lot of anxiety about
00:52:33.559
popularity um which maybe you'll feel better about I don't know if you have that
00:52:43.799
um yeah I mean that's what this is about okay so let's I want I kind of want to look for I never written any rails I
00:52:50.559
don't know a single thing about rails I've never seriously worked on a rails application and in fact it wasn't even really my uh choice or decision
00:52:57.440
it actually to do with one of the people or two people in the acknowledgement section um so I kind of want to look at
00:53:02.480
this stack where I have this very I try to be value neutral legend about key dependencies and things I used in those
00:53:09.000
four projects and there's Ruby SQL Sinatra postgress and then 2024 there's that's like you know 13 years ago and
00:53:15.960
then 2024 there's Ruby SQL postgress RTO and rodo um okay so what's different uh Ruby
00:53:23.359
was hot no one questioned you for using it for anything but you know things were might be very strange uh in 2011 and I
00:53:30.799
think it's uh hard to relate but in 2011 postest was extremely strange like the
00:53:36.000
fact that like at Heroku people say you know rails is in my SQL project and every once in a while there's these
00:53:41.760
annoying bugs that happened and you're a rails company so what the hell are you doing uh why are you rolling this
00:53:47.200
Boulder uphill and um investors because I worked at a previously a fork
00:53:52.480
postgress company they would say well maybe if you based on my sequel you'd be more successful
00:53:57.720
um so in my view like my weird Factor has basically just switched places into two dependencies and maybe got even a
00:54:03.440
little weirder because I think sonra still has a little bit more you know history and knowledge than R up and the
00:54:10.599
question is uh you know did it really matter to how I perceived the engineering of either project and its
00:54:17.119
effect on my life and uh the short answer is uh no that's why when people
00:54:23.079
said oh it's weird you're doing that I said doing what uh I was just doing the same thing
00:54:29.359
um so if Ruby still is very good then why did it become weird for people uh
00:54:36.520
and did something bad happen and frankly I don't know uh because I never get much
00:54:42.079
thought to being popular I was very used to using unpopular dependencies unpopular databases unpopular web
00:54:48.640
servers unpopular RMS right the only thing you know I only get one popular thing at a time maybe two if you count
00:54:53.920
Linux sort of popular uh um in fact I would say that my life has
00:54:59.680
basically gotten better which is one reason why I stick with the project and um I think one thing that's important to
00:55:07.240
maybe understand about you know I mean you could say me personally although it's not personal is I came from a very
00:55:14.720
different set of priorities uh than Ruby I in 2011 I came from the postgress
00:55:19.760
world postgress and Ruby were not except in Japan not yet married um and uh you
00:55:25.319
know postgress is a very conservative project uh and that was that was not
00:55:31.520
what ruby was in 2011 um it you know like 18 to one n was very
00:55:39.520
painful and um you know rails was always breaking
00:55:46.000
stuff uh I mean it was just not it didn't really seem like the right fit uh
00:55:51.520
intuitively um but over time I think maybe my
00:55:57.119
perception of it is just very different than people who have been doing rails for a long time uh so let's look at the common
00:56:04.000
interpretations of Ruby uh some of which are laudatory some of which are the
00:56:10.000
opposite and some of which maybe are both or come from the same thing and people often use terms like inspired
00:56:15.920
artistic or you know romantic terms it's you know productive uh about happiness um they also say it's slow
00:56:23.960
okay it's still a little slow all right I'm not going to it's not like as slow as it was but it's um you know it's not
00:56:29.079
the fastest thing or and maybe less goodly it was wild or in principled um
00:56:36.280
and that maintenance was impossible and it's good for prototyping but do this ring a bell to anybody does
00:56:43.039
do you hear this a lot yeah okay see see some nodding um and that's really not the lens at all
00:56:50.039
which I executed my Ruby life uh so I would like to suggest or perhaps have
00:56:57.520
you think a while about a reinterpretation of what ruby is good at and in my mind it is stable it's
00:57:04.559
rigorous or it's useful in rigorous operations it is prudent it is quite
00:57:10.079
restrained and it's economical and yeah it's still a little bit slow I'm sorry it's not the best thing but it's not the
00:57:15.480
worst thing for a certain kind of work um and some aspects of the slowness are hard to fix actually come come into the
00:57:21.559
advantages that's what makes it so devilishly difficult uh so i' like talk about
00:57:26.760
language stability and restraint so in 2011 I started buying Ruby and you know
00:57:32.039
there's 1819 and there's like rails is breaking all time and then um but around 2013 I think this is a key year keyword
00:57:38.640
arguments were introduced to the language and then it didn't change a lot
00:57:43.680
keyword arguments like at the moment you reach the stability of course you don't know it because next year there could be
00:57:49.160
something else but there wasn't uh keyword arguments not only made the language better and it's fairly
00:57:55.359
conventional feature it also started slowly to make code be written in that way so code started to normalize the C
00:58:01.799
arguments and I thought that was just an improvement rather than throwing hashes everywhere
00:58:07.240
um and then things kind of stopped 2013 is a very important year I think in this story uh and in 2016 I guess the Ruby
00:58:14.760
core people decided that actually working on the less legible very difficult system features like
00:58:20.599
performance and multicore were important and Ruby 3x3 begins and I'm pretty happy with that because like okay you know I
00:58:25.880
basically okay with the language but faster is good and you know probably need to figure out how to do some code generation and in 2021 uh yit got into
00:58:34.280
Ruby and it's not only was The Interpreter faster over the years but that made certain workloads considerably
00:58:39.440
faster it's not as fast as JavaScript uh you know compilers with like a jillion Engineers on it but it's pretty good um
00:58:46.920
aside I'm actually very impressed with Shopify they produce surprisingly good open source artifacts uh I've used
00:58:51.960
tapioca as well I don't use survey right now but the previous one did they seem to have a knack for producing Things
00:58:57.720
That Go Upstream sorbet if you notice is very captured by Stripes priorities um you always feel like if
00:59:03.839
you get a new version of Ruby that works it's like a charity somehow um I'm just waiting for the day
00:59:09.839
when it doesn't happen uh but somehow you know I don't know what they're doing but they're very good at it you know
00:59:15.799
just a little shout out I guess um besides language stability there's
00:59:21.119
stability and key libraries here's the timeline uh 2007 sequel actually it's not not written by Jeremy Evans to begin
00:59:27.359
with uh it's written by someone else he tends to do this he adopts other people's libraries with he thinks good ideas um by the time we started using in
00:59:36.359
201 that's right you know it's already four years old and 2014 he has Rod off
00:59:42.079
to his little Empire and then uh or sorry Roa and then the year after that Rod off
00:59:48.599
um now it's impossible not to discuss this man uh while actually understanding
00:59:53.799
the situation uh he maintains all of the and he has a lot of presentations on all of these and there's a reason why they
01:00:00.680
all work together normally micr Frameworks you know you glue things together they don't really I mean if they work together this year they may
01:00:06.000
not work together next year well he does all these um we were actually so puzzled
01:00:12.000
within one year of using SQL that we invited him and this is the only person we've ever asked to do this uh from
01:00:18.240
Department of data to give a talk at Heroku as to what exactly was your developed
01:00:23.960
methodology um you should review his talks especially about his work at the State uh and the
01:00:30.920
libraries uh carefully and there's a reason for being careful because if you
01:00:36.039
blink you'll miss something very important because he's kind of doesn't
01:00:41.160
like to you know pump up his accomplishments and um here's this
01:00:47.160
little phrase as not focused on all this interview where he says it gives me a sense of accomplishment to be able to fix bugs and rubies that have been known
01:00:53.559
but unfixed for many years that's a situation doesn't happen my open source projects now you must think surely this
01:01:00.480
is a matter of degree or interpretive statements fact check
01:01:06.599
true always zero always hours days sometimes if it's really hard and you
01:01:12.119
might think well 1,200 closed that's not must be because no one uses this I'm like well I would think that too but let
01:01:17.920
me tell you it's the weird one where it's just has a lot of features it's quite complicated and very few
01:01:23.520
bugs uh he does this for all of his projects He also answers all the mailing lists all discussion threads all the
01:01:29.680
stack overflows all the irc's and he also maintains a multi 100,000 L web location at the state I don't really
01:01:36.680
know how he does it um anyways yeah it's I've been trying to
01:01:42.359
figure out how he does his thing for like the past 13 years uh also he has monthly releases
01:01:48.799
this is squel and every month there's a release they're not all big in fact they're all
01:01:55.079
very small and then I just click the yes button on dependabot and then nothing happens it's great people say oh rails
01:02:03.319
is new rails is coming I said I don't care you know uh I think
01:02:09.200
I've had five regressions sorry three regressions maybe one year every five I'm waiting for the next one every five years maybe
01:02:16.520
uh usually pretty small uh yeah it's very weird I mean I think
01:02:23.680
to appreciate you have to appreciate the weirdness of just how unusual this is uh
01:02:31.200
in any kind of software in any language uh the other weird thing is plugins in his uh software plugins are
01:02:39.160
not peripheral pieces of behavior they're closer to configuration or options this is sqls plug-in list I'm
01:02:44.359
not sure if I got all of it because I thought it would just be completely unclear it's actually a web page that this is a screenshot
01:02:49.400
of uh there's a lot in there does all sorts of options all sorts of optional things he's very sensitive to
01:02:55.039
distributed cost that's why Ruby libraries are quite fast so he only loads code you absolutely want to need
01:03:01.039
and sometimes actually this is one area where generative AI has been very helpful sometimes says hey there's a
01:03:06.640
ruby plugin for that does what you want I said or for SQL first party I said really and then you know as we say it at
01:03:13.799
work Jeremy EV thinks of everything um something important to know use those plugins they're not
01:03:18.920
peripheral they are like configuration almost uh now the problem with
01:03:24.000
microframeworks is they don't really have any opinions on how work together and I guess someone uh asked Jeremy to have an opinion and so look up this repo
01:03:31.119
it has the somewhat uninspired name Roa SQL stack this is a link by the way if you go to the you know you can click on
01:03:37.599
it if you find the slide okay so I would like to go move on
01:03:44.039
from like the personal because it is very important to understand this Trio projects uh how it's released and why
01:03:50.039
they're being cohesive and also their bizarre level of quality uh truly a mystery I mean actually uh so but one
01:03:57.599
thing I copied from him which he himself copied in SQL from the previous maintainer is 100% at the time line
01:04:03.960
coverage and then uh eventually Branch coverage when Ruby could support that uh
01:04:10.839
now when I was taught computer science was I taught when I was educated when I
01:04:17.640
when I was singing through classes there we go I was singing through classes in computer science and the conventional wisdom was okay once you do 80% or
01:04:24.520
something like that be in coverage you get marginal returns uh that's probably true but something very special happens
01:04:31.640
at 100% where any piece of code you write it's very clear immediately what is not tested the inspection process
01:04:37.960
becomes trivial and actually in Ruby more so than most languages because of dynamism which also makes it
01:04:44.400
slow uh you're able to inject um pretty much whatever you
01:04:52.039
need anywhere to get the 100% fairly inexpensively uh so I would recommend giving it a try
01:04:58.200
and in fact I would do it a file at a time if you have a big application just choose one file put in the 100% regime
01:05:04.359
and leave everything else alone at one file at a time it's much more important to automate inspection than it is to raise the arogant number Pro tip perhaps
01:05:13.000
uh so I've been doing this since cus it's easier than you think and I think it wor worth more than you think
01:05:20.200
too when I tell people this who don't use Ruby they say is this a crutch for not having stag typing
01:05:26.400
and the answer is no uh and I think I could say the answer is no because not only did I uh write
01:05:35.480
you know static PR static languages I also wrote a survey program for a while and what I realized is that test you
01:05:42.640
static typing can catch a class of bugs but really when you're writing you know control plane software for you know databases VMS you get all sorts of
01:05:50.079
really obscure behavior and you need to be able inject faults in very weird combinations any way
01:05:56.520
everywhere affordably without torturing the program being tested you will never be able to meat the quality level if you
01:06:03.240
mercilessly add those tests from lessons in production which are very expensively
01:06:08.319
learned um so no I think getting the dynamic Behavior exactly way you want it is actually extremely valuable so it's
01:06:16.279
not a crutch for laack typing so try doing 100 if you have quality
01:06:21.520
priorities is stag typing interesting for Ruby I think it is for cross referencing code is big I use emac
01:06:27.279
because I'm old uh and LSP and it does improve the economy of like typos and
01:06:32.760
simple defects but you just can't get the really complex stuff without the tests okay I'm getting close to how am I
01:06:40.359
doing on time hopefully all right uh I like to discuss rigor and economy and
01:06:46.200
operations people often associate rby programmers as being very loose I'm not sure if that's a 2012 conceit but it's a
01:06:54.039
common thing and my statement is the reple is
01:06:59.200
key uh the reple is essential for teamwork not taking an archival because
01:07:05.599
you can show a very complete transcript of exactly how a decision was made or an operation was performed both input and
01:07:11.839
output and can convey it to your colleagues and have it archived when you're going over how wrong you
01:07:17.400
were um instead of waving your hands or working through and I see this happen
01:07:22.559
like go programs for example like in you do SQL statements because it is an interpreter to control the program just
01:07:29.400
use the symbols in the program you hack every single day this is this unification I think is key to the cost
01:07:36.119
effectiveness of all four operations um also you can do reporting
01:07:42.839
it's pretty complicated this is purposely really really small because it's actually a very complicated report
01:07:48.400
where I'm doing stuff with the GitHub API and the database and yeah you can do
01:07:54.640
pretty complicated stuff in the rapple that's throwaway and very cheap very important for figuring stuff out rigor
01:08:00.559
it's actually very good in Ruby to write to operate systems uh that need to be rigorous uh you can learn a lot more a
01:08:07.599
lot more cheaply and Ruby is just much better at
01:08:12.880
this than similar languages um and I want to discuss a
01:08:18.799
little bit why it's actually very short near the end like there's other languages reples they kind of have a similar philosophy why is it better
01:08:26.159
and it's blocks and you say what is this 2009 you're going to tell me about blocks uh sure when I first encounter
01:08:33.719
blocks I thought they were an interesting variant of Lambda uh you know like when you take scheme and okay
01:08:39.480
don't do that anymore but when you learn some you know basic lamb to calculus stuff they're like oh you know these are
01:08:45.480
a weird Version of First Class functions and in fact there's also first class functions and you think ick you know
01:08:51.719
this language has two very nearly similar things that are not the same and that's not orthogonal and you're like
01:08:57.480
this breaks all design rules and what is this garbage okay that's me from like 2011
01:09:03.839
um but I come to appreciate that the way that they influence control flow a l complicated and the way they interact
01:09:09.960
with methods being more special than just you know like a PL like a PL theorist Lambda calculus is actually
01:09:16.679
essential to how they work uh that and they are wh space and sensitive enough to let you Cate stuff into the prompt to
01:09:24.839
make a humane to chain very large Expressions so blocks that's really the reason I do it um so the end uh and
01:09:33.480
conclusion I think Ruby fits my choice of problem very well and has gotten
01:09:38.719
better over the years uh concision with blocks uh cap you know being able to
01:09:44.600
capture knowledge through tests from horrible things in production uh very Rous documentation
01:09:51.640
and teamwork through copying reppel transcripts and very high quality of key libraries du to one really weird guy uh
01:09:59.199
you might be surprised how often that happens there's a guy named Tom Lane on postgress he's kind of essential
01:10:05.360
um and all those virtues are really about you know you could say oh develop productivity but it also translates to
01:10:11.199
revers reduced personnel and the thing about reduced Personnel is not only it cost less but software does not scale
01:10:17.920
linearly with Personnel more Personnel makes the software go mad one Personnel at a time so if you can cut 20% of your
01:10:24.760
personnel you a much more sane piece of software and um these are not I think
01:10:30.360
the standard ways to analyze Ruby they're related but usually people talk about expressiveness and things of that where I'm like okay you know basically I
01:10:35.760
can get more functionality in smaller space and I think higher stability than
01:10:41.040
what you get in I don't know rust or typescript I mean typescript I feel like everything changes every three years um
01:10:48.719
and you know maybe that's kind of not what people were thinking in 2013 when people formed their opinions
01:10:54.560
but that's how I've experienced it thank you we got time for questions does anyone care okay the slide oh uh
01:11:02.320
slides.com FDR FDR like the president
01:11:09.760
twice uh other questions any of you use SQL before
01:11:16.600
that's probably Roe okay oh okay there's like four did you any of you realize how weird it is as a software
01:11:24.320
artifact any of you any of you invite him to give a talk at your place you should do that
01:11:30.120
I mean he might actually do it my name is Vladimir working with Arena martians
01:11:35.360
I don't have like about slides for this Meetup you know that's more like for conference stuff and for this event I
01:11:42.440
would like to be less formal uh but actually the number of people is greater
01:11:47.960
than at some conferences which is like a bit not stressful but anyway
01:11:53.280
uh yes I'm you know I'm a rails fan uh you know I have a lot of rails
01:12:00.400
stuff uh and today I'm going to make rails kind of suffer a bit and you sorry
01:12:08.440
but uh we will get through that okay let's talk about rails and bus web
01:12:16.239
assembly okay uh we're going to progress slowly so rails rails is a web framework
01:12:24.760
uh that's a actually quote from the official website right uh what's interesting here is like everything
01:12:30.719
needed to create database backed web applications interesting right uh if it
01:12:36.679
sounds like you cannot create a rails application without a database which is not true but yeah raise your hand if you
01:12:42.679
ever created a rails application without a database yeah you see like a lot of people doing that I think we should tell
01:12:50.199
uh you know rails Foundation to remove this database backed web applications from the website we're losing our you
01:12:57.679
know uh audience okay uh web assembly or vas uh I don't know how to corate it
01:13:04.440
actually it's C but let's go with f um okay it's a binary instraction format
01:13:09.960
for St based virtual machine you know how we kind of starting to make everything more complicated in this talk
01:13:16.679
from like web framework database back applications and write into virtual machines instructions and all that stuff
01:13:23.920
and that's good question like what do these two may have in common right like
01:13:29.639
uh why do we need them to play together so uh let's start with the
01:13:36.000
second part and talk about why we should care about web assembly at
01:13:41.440
all I I'm a bit biased because I've been working with this technology for a while
01:13:46.880
and I don't know how to answer this question honestly so I asked a good friend of mine uh to tell me some like
01:13:54.560
you know short explanation like why we should take a look at the web assembly why we
01:14:00.159
should worry about it and so on and there is some interesting points here let's let's let it finish uh before we
01:14:08.880
jump into the bit that you know uh I was surprised the most yeah yeah pushing the boundaries of
01:14:16.480
what's possible in web some items they're kind of correct we're going to talk about them but this even python you
01:14:24.080
know even python could could be compiled into web assembly in used anywhere I like why why like okay I understand like
01:14:31.480
C rust whatever all the compiled languages but even python so that's why
01:14:37.239
I'm here today to get rid of python and replace it with Ruby and rails and
01:14:42.639
demonstrate you that actually that well maybe even make more sense than putting
01:14:47.719
python everywhere stop doing this okay uh web assembly pushing the boundaries
01:14:54.840
what is like three key features of web assembly as
01:14:59.920
a how would suppos like instruction uh format whatever for ver
01:15:05.600
stack based version machine so basically it's intermediate code and we're going to talk about it in a minute uh using
01:15:12.280
web assembly gives us performance portability and safety by Design but it's actually could be easily
01:15:20.120
uh broken especially with newer editions uh what we talk about perform
01:15:25.239
performance and portability uh we need to take a look at
01:15:31.199
how web assembly Works what is it so web assembly is this uh
01:15:37.000
wa module so instruction set uh your program compiled like transformed I
01:15:44.560
would say like it's intermediate b u it's not even binary it could be binary anyway intermediate
01:15:50.560
representation of your program or in any language but uh compiled into to instruction sequences uh for stack based
01:15:58.880
virtual Machin anyway so it's kind of intermediate presentation that could be put in some was runtime that could be
01:16:05.199
there are many of them and the performance comes from the fact that the runtime can use these instructions and
01:16:13.120
transpile transform them into machine code and that's how you achieve performance that's how uh Bas in the
01:16:20.920
browser work works much faster than JavaScript that's why it's used uh and many cool uh projects like I think the
01:16:29.159
most famous one is figma for us V in the browser so that's how they achieve the
01:16:34.840
performance by using vas there are many vas round times outside of browsers yes
01:16:40.679
web assembly is probably the primary target and that's what you think of when talking about was but we also have other
01:16:47.520
runtimes tons of them they all have pretty much similar names and you
01:16:55.080
probably heard of some of them but uh mostly they used under the hood of the technology use somewhere on the
01:17:01.440
serverless uh platforms maybe within other uh systems as embedded scripting
01:17:08.360
engines and so on and um another thing to talk about so
01:17:13.520
there are many run times that we could Target and most of them could be embedded into other systems as
01:17:19.920
well uh the big thing uh uh like I think the big step step forward was made uh
01:17:27.560
like uh four years ago about with the introduction of web assembly system
01:17:32.800
interface standard that's basically was the movement of of from of going away
01:17:39.199
from this browser based philosophy to being a universal format for pretty much
01:17:45.600
anything because originally web assembly was buil for browsers like to so performance and sandboxing problems but
01:17:51.400
then uh it turned out that it's useful as a embedded and sandbox environment
01:17:57.280
pretty much anywhere but and we need to make the API for the runtime independent
01:18:03.320
of the JavaScript run time that's how system interface appeared and um I'm
01:18:09.080
talking about it because now uh uh that's something that is related to Ruby
01:18:15.800
I don't think like u a lot of people noticed this part of the ru 3.2 release
01:18:21.880
note even though that was the very beginning of release note and pretty huge explanation what has happened but
01:18:28.320
Ruby got uh system web assembly system interface support and Ruby 3.2 that
01:18:36.440
means that now Ruby C code the one that we used to write Ruby
01:18:42.719
VM MRI uh I'm specifically talking about this one uh it now could be compiled
01:18:50.600
into uh uh format compatible with this new standard that required some changes
01:18:56.480
into Seco like some adding some hacks around it um I have no kind of a
01:19:02.239
relation to it I only read W code not write it uh but anyway that made it
01:19:07.440
possible to compile Ruby itself into web assembly the whole Ruby VM and and use
01:19:14.120
it for example in the browser that's what the first use case like running IRB
01:19:19.159
in the browser and that's how we got better support for Ruby and the on web
01:19:24.760
assembly because we cannot say that that's the beginning because prior to that it was possible since Ruby is
01:19:30.199
written in C and it wasn't great and still is a project called mcrip and
01:19:36.120
which allows you to compile pretty much anything written in C C+ pass into web assembly uh and it's
01:19:45.520
I don't know what like right now it's also Universal but it originally targeted browsers as well but that was a
01:19:51.239
bit hacky way of like compiling blackbox thing into web assembly now Ruby itself
01:19:57.600
knows about web assembly compatibility it makes it more efficient and less
01:20:02.960
hacky to use it so Ruby on R so we can run Ruby on web assembly why why do we
01:20:09.719
need it like okay that's a fun uh you know achievement I think that's cool but
01:20:15.960
what it matters um there are many reasons for running Ruby on web assembly
01:20:23.960
uh we can build interactive playgrounds Learning Materials we can embed and so on and so
01:20:30.080
okay I'm not going to recall it everywhere I want to highlight the last item from the list it's uh prism Ruby
01:20:36.080
parser it also shaps as a web assembly model it it itself is not written in
01:20:41.360
Ruby it's written in C but that's a good example of web assembly portability
01:20:46.840
because now you can if you want to pass Ruby code in your language it's highly
01:20:52.199
likely that your language already have support web assembly runtime you can load prism uh vas into your runtime and
01:20:59.520
parts Ruby code without using Ruby all and it's tiny web assembly model that you can use anywhere like in Java in
01:21:08.080
hcll uh rust whatever so you can parse Ruby with any other
01:21:13.560
language okay um about Playgrounds there are already many projects using Ruby in
01:21:19.840
the browser the official try Ruby Lang org website where you can just go and
01:21:25.480
play with Ruby uh and the web browser and a couple of uh more interesting
01:21:31.199
project I would like to probably demonstrate right now uh let me just figure out how to share my web
01:21:41.280
browser okay I think I should stop the presentation
01:21:46.960
and yeah
01:21:58.679
oh whoa sorry
01:22:07.080
that's um going to bit tricky maybe oh yeah that's better
01:22:15.280
right can oh nice wow this is great
01:22:20.800
developer experience so this is Ruby in the browser and what's good about this particular uh okay I need to navigate
01:22:35.280
here yeah okay
01:22:40.920
we yeah no okay Ah that's another
01:22:46.400
oneor so uh what's cool about this project it's not just running Ruby the browser it's uh also supports installing
01:22:54.159
Gams right in your browser using bundler so hey we have
01:22:59.280
oit and we can run bundle install it will probably and you see you
01:23:05.400
know the logs you usually see every day when you run bundle install in your like system right but it's all happening
01:23:11.719
within the browser there is no server behind this uh functionality and we can uh okay go to
01:23:19.840
the main RB okay please someone tell me your GitHub nickname and we're going to learn something about
01:23:26.400
you maybe your company your name
01:23:32.920
anyone stand
01:23:39.679
are have you that's it that's you T of tons of fun okay please
01:23:50.400
type thank you
01:23:55.719
oh tons of fun okay I'm not responsible for the content
01:24:02.320
of this account sorry just for the record uh X let's round the code uh yeah
01:24:08.199
retry Mew wow that's interesting okay let's wait for it to run why it's so
01:24:17.040
slow yeah tons of fun it's just cool company Neil that's not true well yeah
01:24:24.760
we can go install this parad try Jam if we want but it works you can play around
01:24:30.440
with this uh I'm going to show some cool examples later with this project so that's an example of running
01:24:37.920
Ruby V in the browser and also kind of a implementing the typical flow of using
01:24:44.400
Ruby installing gems like somewhere in the virtual F system uh and running code
01:24:51.800
uh let's take a look at and some other examples yeah we have
01:24:57.840
this Ruby next okay now we have the same problem so that's one more time what is
01:25:05.920
Ruby next that's a that's okay anyway so rubex is a transpiler for Ruby so we can
01:25:13.239
take uh any Ruby code written for future Ruby so here we for example use it it's
01:25:19.800
a better matching we can Target some other uh version like 2.5 we can call
01:25:25.159
transpile and we can see what's going to be H yeah transpile P matching looks ugly but it works uh believe me the
01:25:33.840
instruction sequences for the real pet matching looks uh even worse so if we
01:25:39.880
change the version we can see that okay that's much better we can even run this code and we have some interesting
01:25:45.960
examples like for example I like this uh okay if not operator have you heard this
01:25:52.440
joke about C adding if Operator just because like if not is not cool so we
01:25:59.159
can do this in Ruby and the cool thing about this example that we use refinements so just I want to highlight
01:26:06.040
this is real Ruby VM in the browser there is nothing like limited almost we're going
01:26:12.480
to talk about limitations in a minute but it works keep on working yeah okay it's not it's Friday no it's not Friday
01:26:20.320
anyway yeah there are other some some other examples we're going to talk talk about it next month in Japan like
01:26:27.480
memorized analyst methods how do you like it do you know what it's going to be how it's going to look like it's
01:26:33.280
going to look like this is just a instance variable mization uh embedded
01:26:38.320
into method definition there was original proposal it was rejected no worries so it's not going to come to
01:26:44.040
Ruby but that's fun thing to play around with and we can do this not leaving your
01:26:49.440
browser okay uh let's
01:26:55.719
okay Switching to this one oh the recording going to be fun
01:27:02.440
um oh yeah so that was about
01:27:08.440
playtime lauran Ruby uh couple of cool projects uh already available almost
01:27:15.440
already okay available online uh so Ruby K by Jim recently published as a web
01:27:21.560
version using the same Ruby bom techniques and you can play it online you can learn Ruby fruit Ruby Warrior
01:27:28.880
who knows what ruby Warrior is who played it okay uh let me show you
01:27:35.679
something because that's hasn't been announced yet because I just CED it you know uh
01:27:41.520
yesterday um I think I need to do screen mirroring let me figure out how to do
01:27:48.360
that um uh
01:28:05.000
okay okay nice and now we
01:28:13.600
have so um I think it's just death Lo
01:28:21.159
host yeah oh this is make it better this is web version of
01:28:28.000
Ruby Warrior it's a game also a that aims to teach your Ruby let me show you
01:28:33.679
how it works so it's loading uh yeah you see we already have some stuff here I
01:28:41.760
played okay let me restart and with a new player okay
01:28:49.520
o c no okay anyway um yeah so what is
01:28:55.719
Ruby Warrior it's kind of text base game when you write code for your Warrior to
01:29:01.840
react to some events or and reach stairs in labyrinths so uh this one is pretty
01:29:07.679
simple Warrior walk and we just need to walk to the stair let's run we can see it's so
01:29:16.239
it's down here so it's working and boom we won Next Level we need to fight all
01:29:23.679
let's play one more and we can continue with our interesting and boring
01:29:30.520
parts so I actually reach on level five
01:29:35.600
haven't made made it to the final uh uh you know BS or
01:29:42.480
whatever is going to be okay otherwise I guess we need to
01:29:50.760
attack and let's run uh we can take a break and put it on P something
01:29:57.520
that's not available actually in the original game um I will share the code
01:30:03.080
maybe today or tomorrow I'm going to open source it because I think it's fun because you can play it so here we're
01:30:09.560
fighting with some sludge I know have idea it dies and we go forward and we
01:30:16.880
won again so the thing is uh let me show you the code probably because uh to
01:30:25.560
highlight how it works originally it's a common line based game so you just run Ruby warrier and update your file in
01:30:32.440
your file system and it kind of shows you the step the progress and uh with this web version
01:30:41.119
what we did is basically what we're doing is load in the game and like let's show the play
01:30:48.119
Method I think that's most interesting okay
01:31:00.679
so what I'm doing I'm just running within the virtual Ruby machine this Ruby Warrior Runner it's a entry point
01:31:08.199
for the CLI and passing some uh arguments to it and some
01:31:14.760
stops for standard output and standard input to interact with them that's
01:31:20.199
basically I'm not writing any code to implement the game itself I just took the game written in Ruby for the command
01:31:26.480
line and added a couple of like monkey patches to extract the output and that's
01:31:32.239
it we can play it in the browser with I think kind of more um convenient interface okay let's
01:31:40.159
go back yeah if I do it like this we s some
01:31:47.639
examples so that's probably mostly pad projects right but they still fine okay
01:31:54.040
five time we did it demo time okay yeah
01:31:59.199
so now I would like to start the actual life coding and show you how to get
01:32:04.679
started with Ruby on uh and for that I chose another
01:32:10.199
project another cool project that's all also kind of distributed as a common
01:32:16.840
line utility uh it's a it's called ctran ctran it's named after some jazz
01:32:24.960
musician and um it helps you to figure out you know scales chords for different
01:32:31.280
instruments and just print it print it uh to the output like uh we can try uh
01:32:37.480
Ruby vas it's a project U created by Ruby core and turn it into web vers uh
01:32:43.960
to into web application and uh for
01:32:49.440
that okay the boring part starts I'm going to start a new project because I
01:32:56.320
already have one completed cult
01:33:01.800
live so what we need what do we need to start let's start with a jam
01:33:14.159
okay maybe copilot knows something no no it is okay I going to just copy it so
01:33:21.880
what we need is Jam call train and let's install it I how
01:33:30.679
to
01:33:38.880
okay see how it works so now we have it installed and we
01:33:46.800
can uh normal
01:33:52.840
an
01:34:02.280
okay yeah so this is for example what it can
01:34:10.840
do different cord I know which is your favorite cord so we can communicate with
01:34:16.960
it and it shows as kind of some music theory so yeah there are a lot of stuff after
01:34:24.280
you what I want to do I want to turn it into B application just to sh in qus we
01:34:32.320
okay we can close this one and we can close this one oh that's actually rubic cones I mentioned
01:34:38.080
before so you can check them online so this is stack
01:34:44.280
blades I promised to show you some stack blad stuff what is St blades uh do we
01:34:50.639
have a reserved slot for announcements for after my talk because I don't we have someone from seglet here I'm not
01:34:58.040
the best person to explain what is it but actually it's a fully in browser IDE mostly targeting right now JavaScript CR
01:35:05.520
times but uh not only but mostly so it's
01:35:10.920
it us a cool feature called web containers I guess it's also built on web assembly and allows it to run both
01:35:18.560
uh JavaScript server and a client within the browser again without leing it so
01:35:24.440
it's like it's cool I'm using it for my JavaScript stuff all the time so I added
01:35:30.639
some example like stop to to avoid like dealing with um you know JavaScript CSS
01:35:38.960
and and so on so we have the interface we only need to connect it to the rails
01:35:44.840
applic or Ruby not rails Ruby application to show the actual meaningful information here let's figure
01:35:52.199
out how to do that so we need to um turn
01:35:59.080
our Ruby application into B module I'm going to use Ruby vas Jam here uh which
01:36:12.040
rbas which gives us some tooling to pack Ruby application and Ruby and
01:36:18.400
dependencies okay it's Ruby V guess
01:36:26.119
yeah so uh the basic command we can run here
01:36:31.920
is um the command itself is RB vasm code
01:36:37.440
build and some output file let's go Ruby vas why
01:36:42.639
not oh it's G to take okay it's G to take quite a time uh let me make it a
01:36:49.480
bit faster by copying some intermediate code uh from existing
01:36:59.600
projects so what it does it it download the Ruby source code uh at some
01:37:06.199
additional utilities and compiles everything including your dependencies into single vas module the process like
01:37:14.320
for the first cold start uh is not that fast but it's
01:37:21.119
much faster when you just iterate wait on your own code after you installed all the
01:37:26.360
dependencies okay still copying okay and now it's going to be faster let's see
01:37:33.360
yeah so we already have some stuff pre
01:37:39.119
compiled um why I want to show you all the steps because I want to show you all the pitfalls and problems you're going
01:37:45.639
to encounter around the way because you know it's not going to be easy uh but there are few things to know that could
01:37:53.880
help you to achieve pretty cool results so first thing yeah uh we need
01:38:01.480
I'm waiting for it to fail okay so we failed we failed because it tried to
01:38:08.080
compile uh some native extension and more specifically big
01:38:14.040
decimal the cool thing about Ruby vers is that it only tries
01:38:19.960
to like uh turn your Ruby code in dependency into V module it also tries
01:38:25.880
to compile native C extensions because some not every C extension but some C
01:38:32.159
extensions are vasm ready so we can actually compile them to vasum as well
01:38:39.920
and and if all the offers of gems with C extensions would think about vas a
01:38:45.480
Target we might have everything compilable into us but here we have a problem big decimal why I don't know why
01:38:52.199
actually I don't it's not my problem we need to somehow we don't need it actually for this project it's just a
01:38:57.520
part of the bundle because it's a default gem we can't tell rubby B to exclude default gems and have a minimal
01:39:04.840
version of Ruby BM but I don't want to care about which default gems I used by
01:39:10.679
this project or not so I going to hack around and the way to do that like very
01:39:16.840
dirty hack I just remove this from the jam file lock and let's try again
01:39:26.280
yeah okay that's that's cool that works um yeah so Herby B just what takes
01:39:35.800
a look at your jam file log because it it should be the source of truth but the
01:39:42.920
truth is not objective thing so we have a bundle a bundled uh application it has
01:39:50.080
all the dependencies we need to run cultr and uh we know the size the size
01:40:02.199
no okay uh I know why so one more the
01:40:08.520
size 55 megabytes that's just Ruby and a single dependency like in some default
01:40:15.679
gems there is a thing called B op or whatever so there are some tooling
01:40:22.280
around optimization further optimization of the instructions since we deal with instruction there possibility that there
01:40:27.800
are some there is some de Cod elimination possible not sure I haven't tried with Ruby don't think it's going
01:40:34.320
to work because we need to support the whole VM but anyway worth exploring if you care about megabytes H now we have a
01:40:40.800
bu modu what we can do with it uh before we upload it to stack blades uh we can
01:40:48.320
try it to run it locally and for that I'm going to use the tool called was time so was time is a also and then
01:40:55.880
another run time for web assembly so we can just uh call vas time run and then
01:41:03.119
we call Ruby vasm and then um that everything after
01:41:09.760
this Ruby vasm is basically the same command options that accepted by the Ruby command so it's calling Ruby vasm
01:41:17.520
is similar to Gard Ruby on your local machine and we can actually check first with Ruby so let's let's try uh running
01:41:33.480
train that's a bit tricky but we GNA fix it um and
01:41:40.840
yeah okay let me just copy the example code because it's bit
01:41:47.960
verbus okay yeah we also need this yeah that's so we okay let's this
01:41:56.280
no it's
01:42:16.239
I'm going to show you one more time so this is we this is how we okay um
01:42:24.960
who knows how to move it up in vs code I don't know uh but anyway let's sorry
01:42:32.239
about that so this is how we can run uh directly using rubby code this CTR and
01:42:39.119
um print the result in the output now let's do the same thing with our fast
01:42:46.080
module so last time run Ruby V we need to set up
01:42:52.239
bundler and I think everything else should be the same let's
01:42:58.480
see and yeah first run is kind of cold start while some time must compile our
01:43:04.679
model into machine code and then it runs whenever we're going to run it one more time uh it's much faster so it's like
01:43:11.239
native code cannot load bundler setup
01:43:19.119
why yeah that that that's slash is important actually let's scroll up a bit
01:43:26.760
uh where is the history we lost it okay okay yeah serious question who knows how
01:43:32.040
to move the terminal app so you're going to see it better because I think it's not
01:43:37.760
usable okay let me try to move terminal new window we can do oh
01:43:45.280
new window never tried it better because I think it's not like a
01:43:52.400
sample command for that okay let's try to build it one more time to see the output it's
01:43:58.560
going to be fast we have bundle ah bundle not bundler
01:44:04.360
okay that's I always H you should do something about it like you know bundle
01:44:09.760
bundler that should be or Ling this stuff or renaming to something
01:44:16.199
else okay and now okay we recompiling it again
01:44:27.480
yes uh let me try one more time to show that it's fast we have problem it's
01:44:33.480
cryptic uh kuna determine Os from host OS V yes so the library relies on some
01:44:40.679
UI library from Shopify which do some like uh Weir and high calculation of the
01:44:47.360
terminal based on the operational system and since we running not an operational
01:44:54.159
system it fails to identify what's we using actually so what I'm
01:45:02.320
doing where it is tricky okay
01:45:07.440
so which project it is wait don't minut um let me just copy the hack we need to
01:45:14.599
tell uh colr it's here yeah that our hosts is Linux it's kind of more like
01:45:25.320
B I think now we need to update our code a bit to include this
01:45:35.400
piece I don't worry about this stuff
01:45:43.920
um no oh okay it should be done before we require call train UI uh
01:45:52.040
callr c train c train is bit different thing right
01:46:09.040
okay slow down
01:46:18.800
okay yeah wo thank you
01:46:24.239
um yeah that's basically everything we need to run
01:46:31.719
our like everything we need to know about the implementation of our web service now we need to make this code
01:46:38.360
web compatible uh whenever we build with vum as is we get
01:46:45.760
the uh web assembly system interface compatible module but it has now know
01:46:53.520
of the host system which is Javascript our Target host system and it does not
01:46:59.639
expert any functions we actually cannot interact with it anyhow except from just
01:47:05.440
running it and like you know good old CGI way of passing standard input and getting standard output but that's all
01:47:12.080
we have luckily uh there is a gem called
01:47:17.880
JS not a bad naming good naming I think but anyway like JS I think it's fast JS
01:47:26.159
or whatever but uh we we need to add it to the bundle run
01:47:38.119
it has some C extensions which Define uh inert and out and expert interfaces for
01:47:43.320
our Ras binary and if we try to run this again with this new Jazz uh
01:47:50.880
knowledge of the awareness of our web assembly model it's going to fail um it
01:47:58.080
says like oh I don't have this iner canonical ABI whatever that's that's
01:48:04.560
because it's not implemented is Bast time Bast time is like pure V run time
01:48:10.000
without anything uh Beyond like basic uh CIS goals uh implemented but we need
01:48:17.080
this um interoperability with JS no problem we're going to upload this code
01:48:22.679
um um V model into stack blades and then we're going to run it with JS run time
01:48:29.760
because it has some interesting stuffs too
01:48:34.800
so let me check the time okay so what we need uh what I'm going
01:48:41.000
to do is uh something like that uh I'm G
01:48:46.080
to copy some boiler plate code from one of my previous projects because I want to write everything from scratch one
01:48:52.119
more time and we have some uh let's see rails and pass
01:48:58.119
probably yeah maybe this one so we have this
01:49:05.040
rails B assembly yeah okay that's enough
01:49:13.080
so let's add a new file call it c train culton and here we're going to do the
01:49:21.040
following stuff okay we need some dependencies did I add it down here not yet so for JavaScript part we need to
01:49:28.040
add a couple of things so we need to add Ruby B
01:49:33.080
vas I'm G to call it vas anyway um use npm here yeah npm install save there
01:49:44.719
no I'm not a JavaScript developer is it work going to work yeah nice and another
01:49:51.320
one is called browser Wasim it's basically the implementation of this
01:49:57.639
functions we need from the JavaScript because in JavaScript it's still uh the CL standard is not uh naturally
01:50:05.639
implemented fully at least it's implemented in njs by the way and other
01:50:10.840
njs like R times but not in the browser so yeah we have this stuff and yeah the
01:50:17.880
cool thing about stag blades is it doesn't allow you to upload files more than 10 megabytes at least for free so
01:50:24.520
that's why um I'm going to use AWS and download the file from there and let me
01:50:32.000
just copy the actual URL from the final
01:50:40.440
project and it's going to be this okay so we have our vas model
01:50:50.159
already available online we're going to fetch it and we're going to initialize the the default how can I how Okay the
01:50:59.639
default Ruby VM the default means like without any specific settings for it and then we need to write our code here we
01:51:08.920
need to move our hacks so we need to add
01:51:13.960
this host as
01:51:19.960
hack then we require
01:51:33.159
colors to paint stuff right we don't want it okay
01:51:44.960
uh we can even I don't know Define some Global function right uh like
01:51:51.639
show cord cord
01:51:57.320
representation so to not type all the stuff all the
01:52:03.000
time okay going to copy this code uh
01:52:09.920
put know we don't need to put we going to read it from
01:52:15.400
there uh okay
01:52:21.040
and here we have okay cor
01:52:27.400
representation so we have Ruby 3.3 under the hood so we can use this amazing
01:52:36.400
syntax what's what's else okay so we have a VM we want to initialize it and
01:52:42.440
we have a method to call let's see so
01:52:48.679
um let's keep so VM yeah right VM
01:52:53.840
let's add a VM local variable to hold a reference to the VM once uh we want to laely
01:53:01.800
initialize it on the first attempt of showing the hord and now uh so this is a
01:53:15.040
VM we just need to import in
01:53:21.520
it
01:53:26.599
MH yeah yes called like that D wait in
01:53:35.480
it and that's it and now what we can do we can
01:53:41.360
get present okay output just go output uh BM eval show cord and
01:53:57.719
yeah any strings
01:54:05.679
cord and representation okay and inner text
01:54:16.040
output let me think about it um that looks like that's it
01:54:33.719
try what's wrong with it you script TR how I run it ah death
01:54:43.840
okay and we have it here I actually don't know how to open
01:54:49.840
the amazing console in in with uh like embedded into stack
01:54:55.920
blades um but I want to
01:55:04.239
check oh no it's usable H okay this
01:55:10.199
one type error I don't see any
01:55:16.760
logs okay we lost you see anything okay let's try to
01:55:22.440
oh okay we we lazily do that yeah so where is our
01:55:31.239
output yeah oh it works anyway never mind it works we just needed to wait and
01:55:37.920
now we can like I see okay Guitar let's now let's open a new window because it's going to be much
01:55:43.760
better um it could be but it's for some reason it's okay
01:55:50.239
let's try to restart I think it's something about authentication with this new window
01:55:56.960
right no let's try again
01:56:04.880
no the whole app okay thank you for your
01:56:12.880
support Yeah so basically what we edit is just the buet code to load and
01:56:19.000
initialize the Ruby app some you know Global method but we don't care because
01:56:24.079
this is our application and yeah let's open it
01:56:30.760
and okay yeah anyway it works here we can just
01:56:36.440
uh how can I hide this St I want be wider and let's show what's
01:56:45.480
your favorite cord I don't know yeah the first one is longer because it downloads
01:56:50.920
everything and but now it works you can see guitar I like piano a lot so
01:56:57.040
this is all powered by the Ruby Jam existing Ruby Jam existing tool which has been developed for years and it
01:57:03.920
carries a lot of knowledge I guess and I don't want toite into JavaScript for example to achieve the same result right
01:57:10.800
I can just upload it here and use so this is our Ruby
01:57:17.520
demo uh it went well actually pretty fast and we have we have some time maybe
01:57:23.639
20 minutes okay uh I think other other part is going to be faster so okay let me
01:57:32.199
take this one and do a short break from laptop yeah so that's what we just
01:57:39.480
did we learn about the first problem actually the only problem we hit during this uh experiment is dealing with
01:57:47.000
dependencies C extensions and that stuff we fixed it quickly and also then some
01:57:52.320
platform specific code that has no knowledge of BU yet that's what we accomplished and now
01:57:59.840
let's talk about rails the actual topic um so rails is not Ruby right and
01:58:09.679
uh that what we just did with uh an existing Ruby project U is doable uh for
01:58:17.719
rails but that would require uh the whole Meetup to live coding I guess so I going to just show
01:58:24.480
some important points here and some code without actually trying to write it
01:58:30.400
luckily uh just 30 minutes ago I finished doing all this stuff so we have problems same problem
01:58:38.159
with C extensions but in the rails applications we have thousands actually of them in the rails itself we have I
01:58:45.800
don't know five six seven whatever uh even if you don't use them they're
01:58:51.119
bundled into your application uh now let's remember that rails is for database backup
01:58:57.119
applications and what about database in the browser that's also solvable uh that's
01:59:03.040
an interesting Challenge and we're going to talk about it in some details we actually need an HTP server because
01:59:09.079
rails is a web application so we need something to serve web requests in the
01:59:14.239
browser well we just sell stack blades and they have web containers and that's actually kind of problem
01:59:20.560
solved um but but there are other options too but that's something to
01:59:26.280
consider um okay we have Freds and we in most cases we need to perform outgoing
01:59:33.560
HTP calls to communicate with something else and that's a problem with web assembly there is no fret support yet
01:59:42.480
similarly there is no HTTP support in the standard that doesn't mean that you cannot use at least HTTP with frats we
01:59:50.000
can do some mockery fibers which are kind of working but uh
01:59:56.560
fully functional threading is not available you need to implement it somehow differently and HTTP could be
02:00:04.159
delegated to the host system for now uh that's how for example R ruid def the
02:00:09.440
project I demonstrated first with oaid works it just created uh we just created
02:00:15.199
a faraday adapter implementing like delegation to the JavaScript Fetch and that's it and it complies with the fire
02:00:22.280
API I can use it interchangeably um we need to De with
02:00:27.480
assets and user uploads I'm not even talking about like processing files
02:00:33.400
although I think I I'm not sure but probably FM is available on Bas well
02:00:38.960
well maybe that's an option but uh yeah uh we need to just think differently
02:00:46.280
background jobs um we needed them for master applications what is a background
02:00:51.400
job on V and real time of course even if you don't really need it um it it's probably
02:00:59.239
not needed for the vas application running isolated in your browser but if it has some background processing and
02:01:05.280
need to send updates you still need this real time functionality and it used to be demo time but I think um I just going to show
02:01:13.480
you some examples instead of uh painfully doing uh rails on vest and
02:01:21.079
then we're going to do some summary okay Switching M
02:01:27.159
again ouch so rails on v
02:01:33.599
um let me show you the initial application first uh it's not on Bas
02:01:39.840
it's just uh
02:01:45.360
um just a ra application with some real time stuff some databases whatever
02:01:52.840
okay let it start
02:02:07.560
anable demo with some I don't know the mix of chats and Trail like boards when
02:02:12.840
you can do some stuff uh it everything is fixed okay this one no
02:02:20.800
no not to today uh you can add items you can chat whatever uh so everything is
02:02:27.000
synchronized between clients I'm not going to spend time on showing that so what do we have
02:02:32.719
here we have a database originally it was po resc but uh for the vas version I
02:02:41.239
just going to use sqlite because um I had no time to implement fast kale
02:02:48.480
adapter um up to this point we have some real time what are we going to implement
02:02:54.280
work around and um we don't have any background jobs we have Gs bundling CSS
02:03:00.599
bundling stuff and what else um yeah we have some dependencies with some C
02:03:06.320
dependencies let me just uh start showing you uh the final rails code and
02:03:13.520
changes related to it let's St the application and
02:03:20.360
um maybe we should just take a look at the GitHub diff and walk through that
02:03:26.800
instead of I know trying to anyway um let me switch to the final
02:03:37.079
solution so and show you how how do I work with this application when it's on
02:03:43.360
vas so what we have here we some have some changes in the g g file um It's
02:03:49.559
Tricky so what do we have uh yeah I replaced pogress with
02:03:54.920
cite and I added some new groups
02:04:00.159
of uh gems first uh there is an active record Nob adapter that's very useful
02:04:06.559
adapter which helps you to reach boab ility of your rails applications
02:04:12.800
application without touching any database stuff so for me it was an
02:04:18.760
option to T that I have all the dependency that the application boots that it could
02:04:26.559
handle the web requests but I don't care about the database because database is going to live somewhere else not within
02:04:32.880
the vest so I'm using this Nob adapter and we have uh Ruby vas as well um one
02:04:40.239
thing interesting thing that we need uh to add this time zone infold data Jam
02:04:45.920
which is usually uh required for Windows machines but in was we also have know
02:04:51.800
knowledge of time zones so we can just install this gam within the V module and
02:04:57.840
that's going to make active support time zone St work and we also have Js Jam in
02:05:03.559
the group JS why we have this strange groups like Ras and JS because we want
02:05:09.159
to use these gems only in this context and want to make it possible to switch between them uh another interesting
02:05:16.559
thing uh to show uh to point your attention to is how we actually build stuff
02:05:22.520
and uh I use a wrapper over Ruby vas command line
02:05:28.040
interface which allows me to specify the list of gems I want to exclude from the
02:05:33.800
bundle so that's an alternative of you know manually editing gem file lock because that's not a good way so here we
02:05:40.199
just keep a list of Gams that I know that are not compilable to us I don't care about them because most of them are
02:05:47.360
not you not going to be used in Bas context Al for example for boot snap and Puma you
02:05:54.320
can try to be more strict with your groups in Jam file and like separate
02:06:00.840
them uh even more to avoid hitting either Bas or JS groups but
02:06:08.280
that's still like kind of a hack I expect like Ruby B to support this ignore feature out of the box soon so
02:06:16.320
you don't need to worry about it a lot and having that we can build our application so when now have uh been
02:06:25.000
B build let's say test
02:06:30.360
v um yeah so it also includes right now it
02:06:37.800
includes all the test gems for some reason I don't know uh so anyway they
02:06:43.400
compil so uh we have 100 something for a smaller rails application just to and
02:06:50.360
give you an idea what's going to be the the actual size of the Rails app so foru we have twice
02:06:55.920
less uh important thing to point to that this
02:07:01.800
test fasm only contains Ruby virtual machine and your dependencies it does
02:07:08.679
not contain your Ruby code because it's it's like we haven't told uh Ruby Bas to
02:07:16.520
do that but still we can run it we can run it with B time
02:07:23.440
again run and was time allow allows you to do
02:07:28.559
some uh file system mounting so we can just Mount current directory into the
02:07:34.040
rails folder and now test fast and let's see
02:07:39.199
what we're going to do so first we want to require bundle set up and um what
02:07:47.840
else uh we can try we can try to for
02:07:53.000
example require rails config environment RB this is how we load our rails
02:07:59.920
application and now we can I don't know put uh rails version
02:08:08.559
stream check which rails version are we running let's
02:08:20.520
check
02:08:34.119
problem uh we compiled the Jaz version for some reason I don't know why there is JS Jam yeah there is JS jam looks
02:08:42.119
like our doesn't really
02:08:50.440
work we don't have ch true bundle
02:08:57.119
only okay let's just remove it from here for now need for a quick
02:09:16.639
fast and we can try one more time
02:09:31.159
okay so what do we have here oh we don't have a sucket yeah that's true so the
02:09:37.239
socket class is not defined at all we cannot require it so that's why we have
02:09:43.159
this um for now is just a folder in the project um okay I call rails fast
02:09:51.000
machine and it comes with several things first it comes with many uh blank files or
02:10:00.079
almost blank files with some stops for some classes some interfaces which we do not have uh like just empty so require
02:10:09.320
going to work there are other ways to do that but we just keep files for now so
02:10:15.000
that's where you just try fail add a new file to be kind of safely loaded and we
02:10:21.880
have this rail sham St we can load it into uh around time as well let's do it
02:10:30.440
first okay well actually for that we have a specific entry point so yeah
02:10:37.760
that's an example of how we can also kind of disable some requires by just
02:10:45.639
adding then to the loaded features um array so it's not array actually but
02:10:50.840
anyway uh so to prevent them from being required and that's another hack could
02:10:55.920
be used and here we have Nob adapter secret keybase which is required loading shames and Runing the
02:11:03.079
environment so let's load this file instead uh
02:11:15.119
Hey rail SL demo
02:11:22.880
okay ra down no okay okay okay and uh yeah we see it's
02:11:31.199
loading some warnings and we see it it's 7 wine 32 like we can actually disable
02:11:38.880
warnings remember it's just a ruby executable it's not this Val it's synex
02:11:45.760
oh whoa wow something went wrong oh I think
02:11:51.119
it's just a okay level is not the same okay it's just a verbus wording level
02:11:57.239
anyway so this is how we can cck around some things that probably compiles or
02:12:04.760
included in a bundle but still not going to work because they require uh like sockets FS whatever so we just tab them
02:12:12.679
uh with custom files which are loaded before actually there is also some
02:12:17.920
interesting things so this is how we make them load first this is how we disable top level Jam
02:12:24.599
method which checks that the jam of the specified version is present and this is how we kind of mimic threats with
02:12:33.040
fibers um it's required to hack around the active record connection
02:12:39.679
Reaper so that's another step so then we need to compile it we had JS we compile
02:12:46.079
it to JavaScript version and the final part how we can add file St for for that
02:12:51.480
we use uh another tool called also developed by the same person who's
02:12:56.599
building uh Ruby Bas it's called vce VFS virtual F system so basically what it
02:13:02.920
does it takes uh uh vas model as an input and just adds a ton of files as
02:13:10.760
you specified them to it and result in a new model which has internal file system
02:13:15.960
with all the files included into it and this is how we comp while the
02:13:22.760
final uh like application vas module that actually looks pretty similar to
02:13:29.400
how we build Docker images because we first get the base version with just
02:13:34.800
Ruby for example then we do bundle install layer and finally we do the like
02:13:41.000
source code layer that's the process is pretty much the same so because it
02:13:46.440
allows us to cach intermediate results so we don't need to recompile everything every time we change a file and mounting
02:13:52.760
files and like packing is pretty fast so it's like seconds and this is the binary
02:14:00.320
binary vasary vasary probably uh we're going to use in the web application and
02:14:07.960
now I'm going to run the web application to kind of almost the end of the talk
02:14:13.639
almost I promise so my rails application lives
02:14:19.760
here okay
02:14:25.760
it's very similar application to what we had uh yeah any cable rails down so we
02:14:31.920
have rails module with it's not too big uh so the same
02:14:40.119
defa Ruby VM any cable demo we compile it we set up all this stuff yeah there
02:14:46.960
are some additional hacks I haven't included into the app itself but patched
02:14:52.000
right in the JavaScript version just to for faster duration we have some hacking
02:14:59.400
around uh any cable so we using any cable here and uh to send updates to all
02:15:06.199
the clients because it works in multiplayer mode we just call a global
02:15:11.320
JavaScript function which is performing in broadcast for us for any cable so we
02:15:17.239
hacking around any cable HTTP adapter and delegating it exec ution to the
02:15:22.440
browser um yeah so web sockets leave outside of the browser we don't need
02:15:27.559
them and we have the cite free basm adapter few few words about this stuff
02:15:42.679
a uh kind of a extension of the official cql light adapter and that comes with WP
02:15:49.880
support basically basically what we need is to implement this uh delegation in the exact function of the database
02:15:56.239
external connection uh and we pass some parameters and we implement this function on JavaScript site which do all
02:16:03.400
the things we need to query the database there are some things we need to implement like uh some apis transactions
02:16:12.679
whatever um yeah that requires some work but it's just like 150 lines of code the
02:16:19.119
original code for SQL light free adapter I think it's like almost 10 times more
02:16:24.639
so we try to reuse rails as much as possible thankfully rails is designed in
02:16:31.679
a way that it's kind of easy to extend uh up to some point anyway so we
02:16:38.599
have this custom adapter that just use JavaScript and let's go back to our JavaScript code and here the important
02:16:46.639
piece is service worker that's where we going to inter accept our requests made
02:16:53.120
by the application and serve them through the V module for that we use so
02:16:59.160
yeah so this is our external interface functions SQL ride for rails nothing
02:17:04.400
simple uh just a yeah database is uh SQL light on vas so it's not persisted right
02:17:12.160
now so it just lives how you have this page open similarly for any cable we
02:17:17.559
just use fetch here and this is how we intercept fetch request from single worker or service
02:17:23.599
worker do some stuff here and that's uh a bunch of code for
02:17:30.840
converting JavaScript request object into W request what is Rec request it's
02:17:36.559
like Rec environment it's a good old Rec an which we just create manually and in
02:17:43.120
the end uh we call rails application call request that's how you can
02:17:49.440
programmatically perform request within the web application then we get the rec
02:17:54.519
response uh we collect it back to something usable in JavaScript special
02:18:00.639
care of images because we cannot well technically we can but it requires some
02:18:07.679
deeper knowledge of how B work with memory access binary data I'm just passing strings around and we don't care
02:18:13.920
about performance everything is local and that's pretty much it and then we respond uh with this data back
02:18:21.360
to the browser let's see in action
02:18:28.440
um
02:18:37.200
okay okay uh we have a running and one thing to point is that since we're using
02:18:42.920
service workers we need to run it with htps uh so I'm using pum here uh yeah
02:18:51.479
this is the same application and it runs fully in the browser we can do some
02:18:56.920
stuff we can open uh let's open another window just to show that it's
02:19:03.000
also how can I okay
02:19:09.200
maybe hello well we can check some check
02:19:18.080
boxes and it works and since it lives and ser worker so the database is alive
02:19:23.599
as long as the service worker is alive and yeah that just
02:19:36.599
of the talk but I want to keep you for like five minutes I have
02:19:41.960
slides okay I'm gonna share links more because uh there are more cool stuff because this is another demo of a
02:19:48.120
different application running fully within stack blades and it's also rails application but it's uh using kind of
02:19:55.840
expressjs within web container to intercept requests and serve rails data
02:20:01.640
through basm uh it's also available online it use the same principles as the service work one let's go back to the
02:20:08.600
theory and some uh not so boring stuff
02:20:14.840
okay you can start cutting the surprise yeah the surprise okay just to recap the
02:20:22.280
challenges and the ways to overcome them we have databases and the good thing is
02:20:27.600
that sqlite is available on V so we can run it in the browser pogress is also available on L and it's progressing like
02:20:34.560
every week like it just PG light has been announced like month ago even less
02:20:41.120
and now they H going to add support for extensions pretty much soon so I haven't
02:20:47.280
tried yet but that sounds cool we have persistence options so
02:20:53.080
right now I'm dealing with in like just in memory in process memory uh stuff which is not stable of course but there
02:20:59.600
are options to store databases row data in index DB or in the more modern a
02:21:06.880
feature called uh open private file system so yeah I think I I'm not sure
02:21:13.800
about pidilite it definitely support xdb some sqlite implementation support both
02:21:19.640
so was checking uh the thing is uh but as we said in the beginning browser is
02:21:26.399
not the only target for VB assembly right you can run it in desktop applications or server applications
02:21:31.880
wherever and there you have no limits on how to use database you just need to implement interface for communicating
02:21:37.200
between Ruby and your runtime HTTP servers so we just seen uh
02:21:44.439
that we can use service workers in browsers they work pretty good like stch blits built on top of service workers to
02:21:50.319
do this all the HTP emulation and we can use in other run
02:21:56.960
times we can just write HTP proxies like Express JS example I haven't really uh
02:22:02.720
showed you but it exists uh the cool thing is that someday in the future uh a
02:22:10.319
new standard U HTP proxy probably be part of the system interface and that
02:22:16.000
would allow you to just Define a common API in your rails vasm and plug it as a
02:22:23.120
universal vasm into anything that could serve uh F HTP proxy applications so you
02:22:29.479
don't need to write all the glue and code we have right now um background jobs Bess is on vas so
02:22:37.720
it's a good job we can run it there I think it's going to be I'm not sure they support list and notifi features but
02:22:44.399
that's not the only way to do that so yeah I think that's that could be done at least at the kind of a service layer
02:22:51.800
but uh we still need something to communicate between workers because background jobs makes sense if you have
02:22:57.040
multiple V models running your applications and running background jobs within the same browser and we can use
02:23:04.120
like broadcast channel API for example or something else like there are many
02:23:10.080
options for that HTTP so right now the best way to use
02:23:16.399
HTTP in Ruby vas in the browser is just to do this trick with JavaScript uh
02:23:24.040
delegation and external interface and call in Fetch and in the future there is also
02:23:30.359
standard for HTTP Comm and preview free and that's probably going to be
02:23:36.720
solved cables um if you still need them there are other options like we can use
02:23:42.040
other transports we can use any cable we can embed any cable into your host application if it's not a browser for
02:23:48.200
example if it's a go Application it's it's like a no-brainer um why do we need rails on us
02:23:55.399
except from speaking at the meub uh I think again as with Ruby as at
02:24:04.120
least for me the best use case is to make the loop of trying learning and
02:24:09.319
reproducing stuff much smaller so to make it possible to do things faster uh
02:24:15.920
for example I have I managed to make Ruby reproduction script for Action
02:24:22.279
controller uh work in run Ruby Dev even without any custom compilation just within the browser so instead of like
02:24:29.920
downloading the script running it locally installing R rails or whatever it just go to the web uh page write your
02:24:38.080
use case in the template run it where make sure it fails and send it in the
02:24:44.520
issue the rail scare team like please fix it here is a reproduction everyone could play with it everyone can run it
02:24:49.800
run in the browser or maybe even fix it uh one use case I keep in mind that
02:24:56.120
is something like uh ultimate privacy and uh owning your data so you can build
02:25:01.399
application that do not share anything with the outer world that could be useful for I don't know I like Financial
02:25:07.920
tracking noes whatever you have you can selectively sync data with the outer
02:25:13.880
world but keep the most important pieces on your device uh that's uh another kind of
02:25:21.200
version of it as local first applications like like the ones we seen
02:25:26.359
here uh another use case is using the same code for different contexts like
02:25:31.439
running rails app as a CLI to give a CLI interface but using the same rails code
02:25:37.160
inside for business logic or like web or whatever and finally what I call it like
02:25:42.920
offline first 2.0 is actually having everything and data and the application
02:25:48.960
living in the browser and implementing some cool like partial synchronization
02:25:56.200
mechanism with the alter world to share data when it's needed so I think that's
02:26:01.560
cool use case we just need to figure out the storage and replicated storage mechanism for
02:26:07.279
that uh yeah there are multiple run times I already mentioned them but the
02:26:12.319
most exciting I guess except from JavaScript and browser would be desktop
02:26:17.399
apps written with story or whales which is like Tower written and go I would say
02:26:23.120
uh you haven't heard about it and some cool stuff which we don't have yet so in Ruby uh not everywhere
02:26:31.880
but mostly in Ruby so components components is a way to combine uh vast models together
02:26:40.120
without any intermediate glue in code and telling which um methods to export
02:26:45.200
to import and what does the signatures and so on so that's kind of cool thing that's already aailable on V but not yet
02:26:52.600
available for Ruby preview uh number two includes HTTP it
02:27:00.160
has been kind of finalized just a few weeks ago it's not available in Ruby as well but I think it's going to be
02:27:07.040
available soon and it' be nice to have more compatible extensions as I already
02:27:12.080
mentioned so the evolution is kind of fast this
02:27:19.040
days um I think uh we need to we G we we expect more schol stuff coming in the
02:27:25.680
future and uh I think preview number three we will come with everything we
02:27:31.680
need to build full featured rails on vasm and someday we probably have this
02:27:36.960
single command no hacks around just run rails pack W and you have the same
02:27:42.200
application running within W and ship it anywhere uh the question is uh when and
02:27:49.399
we will be live at the end but I know I think the Horizon is like three years for the
02:27:57.359
final pie if we made it till that that would be cool if not then it's not going
02:28:02.920
to be needed at all thank you for
02:28:08.160
waiting
02:28:13.319
um yeah so this is the blog post it's kind of good for making first steps with
02:28:20.439
Ruby onest we don't have anything written on Rails onas I just have some repositories um but we're going to
02:28:27.120
publish links as soon as we publish talks I guess maybe earlier so if you want to ask me anything about this stuff
02:28:34.920
please do that after we finish all the official things here in at GitHub and
02:28:40.840
move to some other place thank
02:28:46.600
you
