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What Elixir Taught Me About Design Patterns
- In Elixir, design patterns emerge from failures in production, reflecting distributed, concurrent, and fault-tolerant design principles.
- The actor model in Elixir treats each process as a living organism, facilitating asynchronous and failure-tolerant communication via messages.
- GenServer formalizes the actor pattern, providing structure, callbacks, and defined interaction APIs for building stateful services.
- Supervisors in Elixir introduce self-healing software by absorbing process failures with restart strategies like one_for_one and one_for_all.
- Task.async_stream enables concurrent, non-blocking processing of collections, preventing system overload with max_concurrency and timeout settings.
- The Application module in Elixir defines system behavior, emphasizing the lifecycle management and resilience hierarchy of processes.
- GenStateMachine models explicit state transitions in stateful systems, promoting clarity, testability, and behavior debugging.
- The Registry assigns names to live processes, offering global semantics for accessing and managing processes in distributed systems.
- The Repository pattern abstracts data persistence mechanics, decoupling core logic from storage details and facilitating testing and backend swapping.
- Context modules in Elixir provide semantic boundaries for system functions, offering composability, clarity, and refactoring flexibility.
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