Talks
Viewing Ruby Blossom
EuRuKo 2016
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so our next speaker comes from Moscow
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he's an indie developer
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and hanami and sidekick contributor so
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welcome onstage Anton davydov
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announcement it's my first English talk
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in my life and that's why I'm really
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nervous about it
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anyway hello Erika
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it's my first year occur and I'm first
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time in Sofia and I'm happy to be here
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with you I meet so many amazing people
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and you are so awesome thank you my name
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is Anton I love stickers and open-source
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sidekick and Konami committer also my
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commits you can find in some projects
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like Ruby rails crystal and etc and also
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I have a social activity I am an
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organizer of
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Moscow Ruby user group and also I have a
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Twitter account for russian-speaking
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developers it's through be understood
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it's Twitter account about Ruby and it
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looks like
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looks like ask me anything on the read
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on the reddit so in japanese language
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you can find really interesting called
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it's called hanami and its mean watching
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the flora Blom of course the most
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popular flower is Sakura but other
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flowers such as tuples are watch it as
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well I found this illustration about
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this process and of course today we will
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talk about rubia and not about flowers
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today we will talk about
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today we will talk about saruba velak
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work which called hanami this framework
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was created by developer from Italy his
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name is Luca
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the first commit was created three years
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ago and as you can see it's a very young
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framework
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code team can consist of two people
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Luca and I think we need to start
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talking about general idea of this
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framework so let's talk about it first
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ideas module Eretria it's enabled to
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switch any parts of your view framework
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for example if you want to use active
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record or maybe Rome instead of Konami
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model you can do it without any problems
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and you can drop some parts of framework
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and it's so easily to the next idea is
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simplicity I think simple to provide
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provide
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the faster way to create production
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applications and
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framework it's just a tool and don't
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make a coat of it
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few conventions if you're using if you
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if you are going to use Konami or you
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again more freedom and you don't need to
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think where or how you can mix your
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business conventionals and framework
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conventionals together
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poor objects pull objects yes I think
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it's clear for everyone there zero
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monkey-patching why it's so important
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for this framework
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if you want to understand this this try
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to pass the squeeze it squeeze about
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where some methods was defined in Ruby
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or in a rails for example you can see
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duplicate method and you need to try to
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understand whereas this mattress was
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defined so in the last idea it's a
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thread safe we all concurrency program
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or we are web servers and this why so
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important I
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have really important not please notice
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this hanami is Naturals hanami is
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natural skiller
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it's a different framework which used
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the MVC pattern and
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compassion of these frameworks it's a
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really stupid idea but of course we will
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compare it later so
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any web application consists of two
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different parts of logic first part it's
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business logic it's your module database
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and maybe some calculation or something
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else and second parts it's data flow on
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data flow term I mean any logic about
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getting requests parts exists call some
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business logic and responses request to
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user
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so let's talk about data flow
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so I forgot Konami
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splitted the logic by different paths
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and let's talk about that the flow
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refreshing your memory of what great
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people are recommended as a recommended
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monolith first strategy and Konami has a
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really nice and very simple HEVC have a
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simple way to create manolito manolito
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applications it's called application of
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heat actually and it looked like this
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when you generate new Konami application
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it will have application folder and this
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folder contains some files all these
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files you can split on three different
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groups first group which configuration
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file it's only one configuration file a
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second group it's routing and
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controllers and the last part it's about
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view paths I mean it's view object and
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plates and assets so of course we are
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all modern guys we use solid principles
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in our works and we want to put we want
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to split our log into separate
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applications for example we can put
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admin logic to different place instead
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of web or maybe just on logic and
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Konami have Konami has a simple solution
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for this to the solution colored are
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continuous actually and it's look like
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back with X where each X is the
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application and it's look like this as
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you can see can utter
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after generation the application Konami
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creates two folders first folder it's
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admin folder and this folder includes
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all parts from our application
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architecture and second folder in my
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example is to a part
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so let's talk about business logic
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Konami use a library folder for all your
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business logic and this fault it's this
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folder consists of two different parts
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to first parts its configuration and
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mappings
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second part its model Konami realized
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repository pattern and that's why we
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have repository folder and entity folder
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and second part it's library in my
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example I use library for the mailer but
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you can use you can put any stuff on
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this vault here so I told the Konami
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it's model of a framework and
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let's look to all parts of Konami
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so if you open github github repository
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with Konami organization you'll see ten
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different games first five games it's
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Konami it's a place again which
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generates some file and provide common
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line interface it's a router this game
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needs only for mapping hue path and
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controllers it's controller you choose
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it's like active support in rails and
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model and second five it's a validation
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helper view assassin mailer
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so let's talk about difference I know
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that this all look strange for you but
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after this part of my speech you'll
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understand that Konami it's nice
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framework so one person says that talk
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is cheap and I have a short about
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obviously squad
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so and this why on the next my slides
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I'll show file display only code samples
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our first code sample it's typical great
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application as this application so it's
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a simple class with only one
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public method it's a call method and
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this method returns array of three
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elements
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so Konami can use
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class read class and MA and maps this
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class to some pros you can see that I
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create a simple instance of Konami
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router and after that I am mapping this
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road on get request on the root folder
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so next example is Sinatra application
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it's clear to I think and hanami I have
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block notation you can write like
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Sinatra like applications to so it's a
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logical to compare rail section and
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Konami action and I have a good example
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of typical race action
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relax I'm kidding I told I told about it
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real estate Konami it's a really
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different frameworks as they realized
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MVC pattern but the principles and ideas
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is different and that's why I think it
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will be good to take each part of MVC
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pattern and
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display how Konami and rails realized it
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so first part its controller
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in typical rest control controller looks
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like this it's class with some methods
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method method can be can have any names
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and I think it's clear
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controllers in DHH cell it's a class to
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but but you can put only rest actions
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into this class into this controller I
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mean so our Konami have a different way
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you can see that it nons its life you
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can see a typical Konami action this
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action is a simple class with only one
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our public method is method call it
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looked like a typical application but
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it's not a typical direct application so
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and it's look like a typical service
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object for example the next part its
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model
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so in or else if you remember we have
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active record an active record realized
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put all validation database data logic
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data and a cessation logic into the
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model and of course you can put some
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authorization logic some search logic
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and etcetera etcetera etcetera of course
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we can use roam
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but sometimes Rome is so complicated for
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for us because we need to realize
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adapters common mappers and other stuff
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myself
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Konami is a cross between rels and Rome
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I told that Konami realized repository
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pattern and
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on this slide you can see entity it's
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like that object like we've dos or maybe
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dry types and this class works only with
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data if you want to work with your
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database you need to use a repository
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object typically passes the objects
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works with database and if you need to
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create update maybe select some data you
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need to use this class so
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support support functionality I have
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only one slide
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you can see a simple ice method and how
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this method
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realized in rails and Konami you can see
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that or else use monkey-patching and in
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konami we creates different class only a
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different string class and use only this
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class for our
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helper methods so let's talk about view
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in also have template view in in this
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folder we have partials and also we have
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our else helper it's a model and in this
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model you can call your view logic also
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we initialize instance variables in our
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controllers and causes variables into
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some place
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in hanami
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in hanami we have
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you object it's a poor Ruby class I
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which provide a simple way to use view
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or view logic and also we have templates
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if you want to
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use some data from your action you can
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create a simple gutter in this action
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and use this Gator instead of instance
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variable so last operation is ourselves
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unfortunately I don't like this part and
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that's why I'll leave it as it lets you
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for independent review sorry
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so let's talk about proxy and cons the
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first Brooks of Konami it's no magic
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really let's look on this code sample
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it's a real quote from my application
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it's a test of action and on this sample
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you can see that I initialize simple
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Ruby object without anything and after
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that I call this object and get simple
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array of data and as you can see we
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don't use some strange and magical
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method like both get and etc
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another example of magic it's questions
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like this on this stack overflow
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question some person tried to use week's
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method in simple Sinatra application and
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you don't understand what's happened and
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why this method not work and that's why
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I think that we need to see the
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difference between language and
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framework so other procs it's best
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practice I hope that great tool doesn't
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not just work correctly great to teach
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developers a good practice and Konami is
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great too because
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Konami teach you some practice like
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modularity
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logic separation and TDD so this
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framework used for test first princip's
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and Konami applications have a really
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nice tasting high pay
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so
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but of course I'm sorry I forgot that to
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deduce that
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so let's talk about cones first course
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is to do it's a note economic problem
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it's usually it's a problem of TDD maybe
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but sometimes you write too many
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unnecessary tests in your application
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for example you can try to write tests
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for your viewed object and in this view
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object you generate HTML of your form
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and you try to test it and sometimes
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it's located
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so next con is same type of code
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so sometimes this framework is verbose
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really for example try to create simple
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admin application only with screwed
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actions and try to do it for maybe 5
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modules and after that you understand
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what I mean
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and
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other course is not stable version now
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canonical version 0.8
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and I remember finding time when linked
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to helper doesn't for correctly in some
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cases of course now it's a fixed but
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anyway and also maybe you remember that
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this game was this framework was renamed
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from Lotus to Konami
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so it's a problem of all new frameworks
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we haven't
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some useful games for
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working for example for working with
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some
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cases and just I think rails is 10 years
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old framework Sinatra is 8 year old and
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that's why that's why I think it's one
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of the reason why some useful games are
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missing
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and the last cons it's if you are a
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modern boy you want and want to work
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with all of this stuff like WebSockets
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or react I have a bad news for you
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Konami doesn't support all of this and
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but of course you can try to realize all
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this stuff but I think it should look
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like this
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so
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we all love benchmarks also I know that
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benchmarks is falsification and
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I think everybody likes charts and each
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mark that's why let's show on some
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charts for benchmarks I used Puma I used
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Puma server with 4 threads and
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thought for for testing kyu's where
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carve is this case and also you can find
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it's a github repository link you can
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open this or show all examples and try
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it on your machine
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so my first benchmark was about rack and
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Konami of course record - of course rec
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is faster than hanami because us because
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hanami it's a wrapper on red and for
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this benchmark I use at Konami shelters
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I'm sorry honey routing only
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so negative mark it's about Sinatra
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grape and Konami I create a simple JSON
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application which returns only one
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simple JSON and this application has
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only one action
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for this example I use it Konami roads
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with Konami controller and you can see
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results here and the next it's more
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interesting example it's real solution
00:18:56.090
42.6 and Konami version
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0.8 I
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absolutely empty two different
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application one for hanami one for rails
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after that I put I
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made two actions for each application
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one action a returns template and second
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returns JSON and after that I use work
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out for my benchmark and you can see
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results here
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so last part of my talk it's about
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James I told the Konami it's very young
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framework that's why sometimes we're
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missing something for example but in
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other way we have a really interesting
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solution for other problems for example
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I try to
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integrate rod I with game this Konami
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and it looks a little nice
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you can use this awesome side and it's
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awesome side for hanami on this side you
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can find some interesting games
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interesting and good posts and if you
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want you can contribute to this side too
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so it's a contact it's main site it's a
00:20:09.770
chat where you can ask anything and this
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is a forum last link it's a forum on
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this forum you can find really
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interesting threads
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so this is the end so thank you so much
00:20:22.000
if you have any questions you can or you
00:20:25.160
can catch me after my talk
00:20:42.600
you
