graph LR
NetworkIOManager["NetworkIOManager"]
ConnectionHandler["ConnectionHandler"]
EventDemultiplexer["EventDemultiplexer"]
EventDispatcher["EventDispatcher"]
SocketAbstractionLayer["SocketAbstractionLayer"]
NetworkIOManager -- "utilizes" --> EventDemultiplexer
NetworkIOManager -- "coordinates" --> ConnectionHandler
NetworkIOManager -- "dispatches events via" --> EventDispatcher
ConnectionHandler -- "uses" --> SocketAbstractionLayer
ConnectionHandler -- "reports new connections to" --> NetworkIOManager
EventDemultiplexer -- "reports events to" --> NetworkIOManager
EventDispatcher -- "receives events from" --> NetworkIOManager
SocketAbstractionLayer -- "used by" --> ConnectionHandler
One paragraph explaining the functionality which is represented by this graph. What the main flow is and what is its purpose.
The central orchestrator of NGINX's event-driven network operations. It coordinates connection acceptance, manages non-blocking I/O events, and dispatches them to higher-level handlers. This component is fundamental for NGINX's high-performance, event-driven model.
Related Classes/Methods: None
Manages the lifecycle of individual network connections. This includes accepting new client connections, associating them with I/O events, and handling their state transitions (e.g., active, closing). It relies on the SocketAbstractionLayer for raw socket operations. This component ensures robust connection management.
Related Classes/Methods: None
Provides the core non-blocking I/O multiplexing functionality, abstracting platform-specific mechanisms like epoll, kqueue, or select. It efficiently monitors multiple file descriptors for I/O readiness events and reports them to the NetworkIOManager. This is crucial for NGINX's scalability and ability to handle many concurrent connections.
Related Classes/Methods: None
Responsible for routing processed network events (e.g., read readiness, write completion, connection closure) from the NetworkIOManager to the appropriate higher-level application components. This component ensures that events are delivered to the correct handlers for further processing.
Related Classes/Methods: None
Offers a platform-independent interface for fundamental socket operations (e.g., socket(), bind(), listen(), accept(), connect(), read(), write(), close()). It encapsulates OS-specific socket API calls, contributing to NGINX's portability across different operating systems.
Related Classes/Methods: None