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Finding Lost
Features
Konrad Alfaro @
How NOT to build mazes
and complexity
Entity
Controller
Service
CQRS
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Who am I? π€
Backend Engineer with 8+ years of experience
π€
Solutions Architect & Consultant @ 8lines.team
π
Software Agencies, Product companies, Enterprises
π¨
Built 2 Startups (and failed)
π°
8lines.team
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8lines.team
Scenario π¬
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8lines.team
β’ Given the system is a CRM system with
Documents and Clients module
β’ Given the resources in the CRM system are
mostly CRUDs
β’ Given the system is going to be used very
infrequently by limited amount of users
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8lines.team
β’ When we to add an electronic signature process
to our Document resource
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8lines.team
Thenβ¦
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8lines.team
I donβt know where to start π±
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Whatβs the most important in
Software Development?
8lines.team
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Framework!
8lines.team
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βLaravel wayβ π§
8lines.team
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βSymfony wayβ π»
8lines.team
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8lines.team
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Controller
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Service
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Event Listener
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Pros β
8lines.team
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8lines.team
β
We comply with the Framework
β
We follow standardised rules
β
We (should) deliver fast
β
It is good enough
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Drawbacks β
8lines.team
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8lines.team
β We hide business logic behind Framework
concepts and rules
β We couple our business logic strictly with
β¨
the Framework
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8lines.team
Takeaways π
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Framework is not your friend,
itβs just a tool you can use
8lines.team
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8lines.team
Itβs too hard to
f
ind anything π
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8lines.team
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DDD
8lines.io
Psst, hey you kids.
Wanna build some Domain
Aggregates?
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Directory Driven Design
8lines.team
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8lines.team
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Command Handler
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8lines.team
Message Handler
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Pros β
8lines.team
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8lines.team
β
We think about our business Domain
β
We have better separation of concerns
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Drawbacks β
8lines.team
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8lines.team
β We introduce a lot of (most likely) unnecessary
complexity - it is just a CRUD!
β We like to implement new patterns just after one
conference talk π
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8lines.team
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Takeaways π
8lines.team
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8lines.team
Donβt be an immature developer
Pick proper solutions to your problems
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8lines.team
You donβt work at Facebook* π
* - Unless you do π
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8lines.team
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Repository overview
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Pros β
8lines.team
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8lines.team
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8lines.team
β’ Given the system is a CRM system with
Documents and Clients module
β’ Given the resources in the CRM system are
mostly CRUDs
β’ Given the system is going to be used very
infrequently by limited amount of users
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8lines.team
β’ Given the system is a CRM system with
Documents and Clients module
β’ Given the resources in the CRM system are
mostly CRUDs
β’ Given the system is going to be used very
infrequently by limited amount of users
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Cons β
8lines.team
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8lines.team
β Hard to implement and maintain
β We introduce a lot of complexity
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8lines.team
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Takeaways π
8lines.team
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Find fun π’ in building solutions,
Instead of trying a new frameworks
8lines.team
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8lines.io
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There is hope!
8lines.team
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Processor
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Modi
f
ier
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Modi
f
ier
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Modi
f
ier
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Action
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Infrastructure
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Drawbacks β
8lines.team
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8lines.team
β This is not a Domain-Driven approach
β It is not suitable for large and complex systems
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Pros β
8lines.team
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8lines.team
β
We introduce separation of business concerns
β
We donβt required everyone to be a DDD expert
β
We deliver fast features using suitable concepts
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8lines.team
β’ Given the system is a CRM system with
Documents and Clients module
β’ Given the resources in the CRM system are
mostly CRUDs
β’ Given the system is going to be used very
infrequently by limited amount of users
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8lines.team
β’ Given the system is a CRM system with
Documents and Clients module
β’ Given the resources in the CRM system are
mostly CRUDs
β’ Given the system is going to be used very
infrequently by limited amount of users
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Takeaways π
8lines.team
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Make your systems yours
8lines.team
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8lines.team
β
Framework is not your friend
β
Donβt be immature and hype-driven
β
Build solutions, not personal playgrounds
β
Make your systems readable for you
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Thanks! π
konradalfaro.com
π
8lines.team
@alfaro_konrad