Event-Driven System

An Event-Driven System is a software system that processes events through event-driven architecture to enable event-driven tasks.

• AKA: Event-Based System, Event-Oriented System, Event-Processing System.
• Context:
  • It can typically include Event Emitters through event source components.
  • It can typically implement Event Consumers via event handler components.
  • It can typically maintain Event Channels using event transport mechanisms.
  • It can typically process Event Notifications through message passing systems.
  • It can typically support Event Subscriptions via publish-subscribe patterns.
  • ...
  • It can often enable Loose Coupling through asynchronous communication.
  • It can often provide Scalability via distributed event processing.
  • It can often implement Event Ordering using event sequence management.
  • It can often support Event Persistence through event store systems.
  • ...
  • It can range from being a Simple Event-Driven System to being a Complex Event-Driven System, depending on its event processing complexity.
  • It can range from being a Centralized Event-Driven System to being a Distributed Event-Driven System, depending on its architectural topology.
  • It can range from being a Push-Based Event-Driven System to being a Pull-Based Event-Driven System, depending on its event delivery model.
  • ...
  • It can utilize Message Brokers for event routing.
  • It can implement Event Buses for event distribution.
  • It can leverage Stream Processing Platforms for event stream handling.
  • It can employ Event Stores for event persistence.
  • It can integrate Complex Event Processing for event correlation.
  • ...
• Example(s):
  • Application Event-Driven Systems, such as:
    • GUI Event-Driven System, which responds to user interface events through event listeners.
    • Web Event-Driven System, which handles HTTP requests via event handlers.
    • Mobile Event-Driven System, which processes touch events through event callbacks.
  • Middleware Event-Driven Systems, such as:
    • Message Queue Event-Driven System, which routes messages through queue mechanisms.
    • Enterprise Service Bus, which integrates services via event mediation.
    • Streaming Platform Event-Driven System, which processes data streams through event pipelines.
  • Infrastructure Event-Driven Systems, such as:
    • Serverless Event-Driven System, which executes functions based on event triggers.
    • Microservice Event-Driven System, which coordinates services through event communication.
    • IoT Event-Driven System, which manages device events via event hubs.
  • Domain-Specific Event-Driven Systems, such as:
    • Financial Event-Driven System, which processes trading events through event matching.
    • Gaming Event-Driven System, which handles game events via event loops.
    • Event-Driven AI System, which processes AI events through intelligent handlers.
  • Service-Based System Pattern, which often implements event-driven communication.
  • Reactive Organizational Software-Based Agent, which uses event-driven behavior.
  • ...
• Counter-Example(s):
  • Request-Response System, which uses synchronous communication rather than event-based messaging.
  • Batch Processing System, which processes data batches rather than individual events.
  • Time-Driven System, which operates on fixed schedules rather than event occurrences.
• See: Software System, System Architecture, Event-Driven Architecture, Event, Message-Driven Architecture, Publish-Subscribe Pattern, Event Sourcing, Asynchronous System.

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