OutboxEventMulticaster 0.3.0 API

All Implemented Interfaces:

org.springframework.context.event.ApplicationEventMulticaster
```
public final class OutboxEventMulticaster
 implements ApplicationEventMulticaster
                    
```
Custom application event multicaster that intercepts @OutboxEvent annotated events.
This class extends Spring's SimpleApplicationEventMulticaster to provide automatic outbox persistence for domain events. When an event marked with @OutboxEvent is published, it is automatically saved to the outbox database.
Key Features:
- Automatic detection of @OutboxEvent annotations
- SpEL-based aggregateId extraction from event properties
- Expression caching for performance optimization
- Configurable publishing behavior (publishAfterSave flag)
SpEL Expression Caching: Parsed SpEL expressions are cached in a ConcurrentHashMap to avoid reparsing the same expressions for every event. This significantly improves performance for high-volume event processing.
Since:

0.3.0

Author:

Roland Beisel

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description
`OutboxEventMulticaster(SimpleApplicationEventMulticaster delegateEventMulticaster, OutboxRecordRepository outboxRecordRepository, OutboxEventSerializer outboxEventSerializer, OutboxProperties outboxProperties, Clock clock)`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Unit`	`multicastEvent(ApplicationEvent event, ResolvableType eventType)`	Intercepts and processes application events.
`Unit`	`multicastEvent(ApplicationEvent event)`	Convenience override that resolves the event type automatically.

Methods inherited from class org.springframework.context.event.ApplicationEventMulticaster
addApplicationListener, addApplicationListenerBean, removeAllListeners, removeApplicationListener, removeApplicationListenerBean, removeApplicationListenerBeans, removeApplicationListeners
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - OutboxEventMulticaster
```
OutboxEventMulticaster(SimpleApplicationEventMulticaster delegateEventMulticaster, OutboxRecordRepository outboxRecordRepository, OutboxEventSerializer outboxEventSerializer, OutboxProperties outboxProperties, Clock clock)
```
- Method Detail
  - multicastEvent
```
 Unit multicastEvent(ApplicationEvent event, ResolvableType eventType)
```
    Intercepts and processes application events.
    Processing flow:
    Extracts payload if event is marked with @OutboxEvent
    Saves event to outbox database (synchronized with transaction)
    Optionally publishes to listeners (controlled by publishAfterSave config)
    Handles non-outbox events normally
    Parameters:
    
    event - The application event to process
    
    eventType - The resolved event type
  - multicastEvent
```
 Unit multicastEvent(ApplicationEvent event)
```
    Convenience override that resolves the event type automatically.
    Delegates to the full multicastEvent(ApplicationEvent, ResolvableType) method with the event type resolved from the event instance.
    
    Parameters:
    
    event - The application event to process