Phoenix Backend

The Phoenix Framework is a highly scalable, real-time backend framework built on top of the Elixir language and the Erlang VM (BEAM). It is designed for high-concurrency applications that require low latency and massive throughput. Core Architecture Components Phoenix follows a modified MVC (Model-View-Controller) pattern, emphasizing explicit data flow and functional programming. • Endpoint: The entry point for all requests. It handles initial tasks like session management and security headers. • Router: Maps incoming HTTP requests (verbs and paths) to specific Controllers. It also supports "Pipelines" to group common middleware (e.g., authentication). • Controllers: Act as the "brain" of the request. They interact with your business logic and return a response (usually JSON for backends). • Contexts: These are dedicated Elixir modules that group related functionality. For example, an Accounts context might handle both User and Credential data, acting as a clear API for the rest of the application. • Ecto: The database wrapper and query generator. It uses Schemas to define data structures and Changesets to handle data validation and casting.