Package org.somda.sdc.common.event

Class AbstractEventMessage<T>

java.lang.Object

org.somda.sdc.common.event.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 Summary

Constructors

Modifier	Constructor	Description
protected	AbstractEventMessage(T payload)

Method Summary

Modifier and Type	Method	Description
T	getPayload()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AbstractEventMessage

protected AbstractEventMessage(T payload)

Method Details

getPayload

public T getPayload()