1. Service
Objects
Evolution
by @andriymosin
1
01
Service Objects benefits
What we trying to solve
04 Existing realizations
Gems, best practices and
ideas
03 What we want
Unification, Validation,
Combinations, etc.
02 What we had
Pretty basic object
05 What we have for now
Our current realization

2. 01
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Why use
Service
Objects?
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1. Atomic operations only
2. Encapsulate all logic
4. Easy to test
3. Easy to manage
5. Best place to put business logic
0. MVC is not enough

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What we had
at the
beginning
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Basic implementation

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Usage

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Service
Unification
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1. Same action method name in all service objects
2. Only one public method in object
3. Result should always be true || false
4. No ‘returns’ inside Service Objects

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And we start our first big refactoring
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What we want
to have in our
Service
Objects
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Our needs
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1. Data Creating
2. Data Updating
3. Combination
4. Validation
5. Callbacks(success, error)

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Data
create
&
update
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Combi
nation
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Validations
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1. Input
1. Required
2. Optional
2. Output
1. Required
2. Optional

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Existing
realizations
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1. Interactor
2. Light Service
3. ActiveInteraction
4. Mutations

16. 05
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What we have
for now
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Own implementation
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with Black Jack and unicorns…
https://github.com/rubakas/cater

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First step was to make
architecture and main
decisions about it
1. Modularity
2. Callbacks(success, error)

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120!!!!!
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26. 30
60
90
120
150
Jul Sep Jan May
Services Refactoring
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More services == More refactoring
Refactoring
time
increase
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Now we have callbacks and
platform for next
experiments
So it’s time for better
error handler and
validations

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Errors
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“Plan to throw one
(implementation)
away; you will,
anyhow.”
- Fred Brooks
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Validations

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Modular implementation with
custom rules
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Virtus
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Next
Milestone

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40. close
Thank
YouPresenter: Andriy Mosin
http://moxa.io/
@andriymosin