Spring transaction bound events
This library adds the necessary infrastructure to use Spring's ApplicationEventPublisher to publish events that are broadcasted on transaction commit. To use this, add the library to your classpath:
<dependency>
<groupId>org.springframework.labs</groupId>
<artifactId>spring-tx-events</artifactId>
<version>1.0.0.BUILD-SNAPSHOT</version>
</dependency>In your Spring configuration, add a bean named applicationEventMulticaster like this:
@Bean ApplicationEventMulticaster applicationEventMulticaster() {
return new TransactionAwareApplicationEventMulticaster();
}With that in place you can now create event classes that extend TransactionBoundApplicationEvent and use them as follows:
class MyComponent
private final ApplicationEventPublisher;
@Inject
public class MyComponent(ApplicationEventPublisher publisher) {
this.publisher = publisher;
}
@Transactional
public void pay(Order order, CreditCard creditCard) {
// process payment
publisher.publishEvent(new OrderPaidEvent(order.getId()));
}
}Assuming OrderPaidEvent inherits from TransactionBoundApplicationEvent, the published event will only be multicasted in case the transaction succeeds.
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