google guava eventbus example

GoolgeGuavaEventBus.java

import com.google.common.eventbus.EventBus;

public class GoolgeGuavaEventBus
{
  public static void main(String[] args) {
    EventBus eventBus = new EventBus();
    //register the receiver
    Listener1 l1 = new Listener1();
    Listener2 l2 = new Listener2();
    eventBus.register(l1);
    eventBus.register(l2);

    // eventBus.unregister(l1); //unregister a receiver
    eventBus.post("my message for Listener1 and Listener2!");
  }
}

Listener1.java

import com.google.common.eventbus.Subscribe;

public class Listener1
{
  // identify post by param-signature
  @Subscribe
  public void doAnything(String s) {
    System.out.println("receipt message in Listener1: '" + s + "'");
  }
}

Listener2.java

import com.google.common.eventbus.Subscribe;

public class Listener2
{
  // identify post by param-signature
  @Subscribe
  public void doAlsoAnything(String s) {
    System.out.println("receipt message in Listener2: '" + s + "'");
  }
}

pom.xml

<!-- add dependencies -->
<dependencies>
  <dependency>
    <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>19.0</version>
  </dependency>
</dependencies>