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Monolithic
Problems
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No content
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EVIL MARTIANS
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EVIL MARTIANS
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Nikolay Sverchkov
@ssnickolay
Math
Elixir
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My name is potato
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What is a Monolith?
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https://en.wikipedia.org/wiki/Monolithic_application
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Monolithic
Application
is
one git repo
with 99%
code base
of project
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What is a Huge
Monolith?
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How I can
understand
my Monolith
is Huge
or no?
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Let’s Estimate it!
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Monolith Estimation:
by commits count
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Monolith Estimation:
by commits count
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Cons:
Strategy: merge or rebase?
Monolith Estimation:
by commits count
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Cons:
Strategy: merge or rebase?
Atomic commits or one commit per
feature (Pull request)?
Monolith Estimation:
by commits count
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No content
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No content
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Monolith Estimation:
by count lines of code
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No content
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Monolith Estimation:
by count lines of code
Pros:
Amount of commits does not influence
on count of code lines
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Monolith Estimation:
by count lines of code
Pros:
Amount of commits does not influence
on count of code lines
Cons:
There is no connection to REAL
production
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What is it in real and what
it seems to be
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Monolith Estimation:
by DataBase size?
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No content
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What does
"Large Database”
mean?
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The size of the database for a regular
web application can be considered as
“Web Big Data” when the backup of this
database cannot be restored to the
developer computer.
Funny Law
of “Web BigData”
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No content
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Huge
Monolith:
A lot of commits +
A lot of code lines +
Deep Production
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Your Project Team
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Rails Project Architecture
Shark Head
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Rails Project Architecture
Shark Head
Elephant Body
+
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Rails Project Architecture
Shark Head
Elephant Body
+
Tiger and Rhino
Legs
+
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Rails Project Architecture
Shark Head
Elephant Body
+
Tiger and Rhino
Legs
+
AND
BLASTERS
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EVIL MARTIANS
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No content
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cloc —exclude-
dir=log,node_modules,
public,tmp,vendor,lurker,
.idea ./
https://github.com/
AlDanial/cloc
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-------------------------------------------------------------------------------
Language files blank comment code
-------------------------------------------------------------------------------
Ruby 3671 30458 3106 145366
JSX 571 5759 43 52618
YAML 182 90 20 33753
JavaScript 492 3247 144 22763
ERB 617 1569 58 18599
Sass 480 3552 194 18024
CoffeeScript 150 874 92 5227
……
……
-------------------------------------------------------------------------------
SUM: 6231 52012 7778 306167
-------------------------------------------------------------------------------
Fountain. 30/05/2018
25.5k commits
SUM: 306,167 LOC
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Is it big enough?
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Is it big enough?
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No content
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No content
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No content
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No content
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No content
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Shopify 30/05/2018
? commits
SUM: ? LOC
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--------------------------------------------------------------------------------
Language files blank comment code
--------------------------------------------------------------------------------
Ruby 13995 271122 19124 1290867
YAML 1791 8962 1166 559395
JSON 332 77 0 303475
Sass 484 39191 4968 185032
ERB 2584 7208 83 111490
JavaScript 1065 22635 5956 109023
CoffeeScript 667 12130 1003 45734
SQL 4 14 0 28300
TypeScript 455 3794 190 23939
liquid 64 4391 28 21809
……
……
--------------------------------------------------------------------------------
SUM: 21742 376631 38507 2705978
--------------------------------------------------------------------------------
Shopify 30/05/2018
306k commits
SUM: 2.7M LOC
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Teaser for @isleofruby
@eljojo
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Monolithic Project
Health Level
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Monolith Health Levels
Healthy
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Monolith Health Levels
Normal
Healthy
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Monolith Health Levels
Normal
Healthy
Legacy
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Monolith Health Levels
Normal
Healthy
Legacy
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Normal
• Rails 4
Healthy
• Rails 5+
• Rails 4 -> Rails 5 in process
Legacy
• Rails 3 and lower
Monolith Healthy Level:
by Rails version
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Normal
• 2.3+
Healthy
• Last stable
Legacy
• 1.9* - What wrong with you, guys? >_<
Monolith Healthy Level:
by Ruby version
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Why we should update
Ruby?
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Because yield_self is
powerful feature?
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Security Vulnerabilities
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Healthy
• Use bundler-audit
Legacy
• Don’t use bundler-audit
Monolith Healthy Level:
by gems version
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All Evil Martians projects
use “bundler-audit”
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All Evil Martians projects
use “bundler-audit”
and “nsp check”
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Monolith Healthy Level:
by Architecture
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Healthy
• It is easy to make changes
• You have permanent refactor for an old
code
Legacy
• You use Rails way (sorry, DHH)
• You have a bunch of different patterns
Monolith Healthy Level:
by Architecture
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Houston, we have a
problem (c)
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Problem =
Cause + Solution
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Solution
Cause
I need to use
some
framework…
e.g. Trailblazer!
Rails MVC is
sucks
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#TODO
My opinion about
Trailblaizer
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No content
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No content
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Saint P NickConf
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Solution
Cause
Rails MVC is
sucks
Use MCC!
M - Model
C - Cells
C - Controller
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class UsersController < ApplicationController
def show
user = User.find(params[:id])
render_app_cell(Users::Cell::Show, user: user)
end
end
MC(ells)C Example
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class UsersController < ApplicationController
def show
user = User.find(params[:id])
render_app_cell(Users::Cell::Show, user: user)
end
end
class ApplicationController < ActionController::Base
def render_app_cell(*args)
render html: cell(*args), layout: 'application'
end
end
MC(ells)C Example
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HANAMI
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Talk about Elixir at the
Ruby Conference
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Solution
Cause
I can use ROM!
ActiveRecord
is sucks
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I
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I
ROM
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Talk twice about Elixir at the
Ruby Conference
ROM.rb ~ Ecto
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Solution
Cause
I can use ROM!
If you can work
with complex
solutions
ActiveRecord
is sucks
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Solution
Cause
Microservices!
Monolithic
architecture
It’s all sucks
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Monolithic
Microservices
vs
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Monolithic
Microservices
!=
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Monolithic
Microservices
>
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Monolithic
Microservices
>
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Solution
Cause
Microservices!
Good choice!
Monolithic
architecture
It’s all sucks
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And Last but not to least
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Opportunity for what?
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No content
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https://
github.com/
palkan/
test-prof
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https://github.com/palkan/
clowne
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https://github.com/marshall-
lee/sidekiq-postpone
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https://github.com/marshall-
lee/sidekiq-postpone
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Blood Contracts
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Next: Blood Contracts
@ssnickolay