Event-Oriented Software Design Pattern

An Event-Oriented Software Design Pattern is a software system design pattern that defines structured mechanisms for processing events through event handlers and controlling event flows.

• Context:
  • It can (typically) provide event processing through:
    • Event Detection via event loops
    • Event Dispatching via event dispatchers
    • Event Handling via event handlers
  • It can (typically) manage event flow using:
    • Event Queues for event buffering
    • Event Filters for event selection
    • Event Routers for event distribution
  • It can (often) implement event processing models such as:
    • Synchronous Processing for immediate event handling
    • Asynchronous Processing for deferred event handling
    • Concurrent Processing for parallel event handling
  • It can range from being a Simple Event Handler to being a Complex Event Processor, depending on its processing requirements.
  • It can serve as an implementation pattern within Event-Driven Architecture for event management.
  • ...
• Examples:
  • Core Patterns, such as:
    • Reactor Pattern for event demultiplexing
    • Observer Pattern for event notification
    • Publisher-Subscriber Pattern for event distribution
  • Processing Patterns, such as:
    • Event Queue Pattern for event buffering
    • Event Filter Pattern for event selection
    • Event Router Pattern for event routing
  • Implementation Patterns, such as:
    • Event Loop Pattern for event detection
    • Event Dispatcher Pattern for event dispatching
    • Event Handler Chain Pattern for event processing
  • ...
• Counter-Examples:
  • Data Processing Patterns, which focus on data transformations rather than event handling.
  • Request-Response Patterns, which implement synchronous communication rather than event-based flow.
  • Pipeline Patterns, which process sequential operations rather than event-driven operations.
• See: Design Pattern, Event-Driven Architecture, Event-Driven Programming, Event (Computing).

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