Skip to main content

Guava EventBus

Geoffrey Hunter
Geoffrey Hunter
mbedded.ninja Author

Overview​

The Guava EventBus is a Java library owned by Google. It is a event broadcasting system which implements an event/listener pattern.

Advantages​

  • Provides a mechanism for loose coupling between objects.

Disadvantages​

  • No returns codes/status/exceptions can be returned from eventBus.post(). This is an advantage that the observer pattern has over an event bus, as it can return values/catch exceptions.

Exceptions​

Exceptions thrown by event handlers will not be caught by the function which called eventBus.post().

Exception support has been discussed in Issue 766 in the Guava GitHub repository.