Package org.somda.sdc.common.event

Class AbstractEventMessage<T>

  • Type Parameters:
    T - payload type.
    All Implemented Interfaces:
    EventMessage
    public abstract class AbstractEventMessage<T>
extends Object
implements EventMessage
    Simple message container to ease use with EventBus.

    Google Guava's event bus library dispatches events based on function parametrization. Given a class with a Subscribe annotation: 

     public class Foo {
     @Subscribe
     void doSomethingWith(Bar payload) {
         // ...
     }
 }
    If an instance of Foo is registered for an event bus and EventBus.post(Object) with a Bar instance is invoked, Guava knows which function to call by looking at the parameters of all Subsribe-annotated functions.

    The abstract event message helps in strong-typing EventBus-accepted functions and encapsulates a default payload that is requestable by using the getPayload() method.

    • Constructor Detail

      • AbstractEventMessage

        protected AbstractEventMessage​(T payload)

    • Method Detail

      • getPayload

        public T getPayload()