File: context.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
File: Main.java
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
public static void main(String[] args) throws Exception {
ApplicationContext ctx = new ClassPathXmlApplicationContext("context.xml");
EventPublisherDemo pub = (EventPublisherDemo) ctx.getBean("publisher");
pub.report("A");
pub.report("B");
}
}
class EventPublisherDemo implements ApplicationContextAware {
private ApplicationContext ctx;
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.ctx = applicationContext;
}
public void report(String message) {
ctx.publishEvent(new MessageEvent(this, message));
}
}
class MessageEvent extends ApplicationEvent {
private String message;
public MessageEvent(Object source, String message) {
super(source);
this.message = message;
}
public String getMessage() {
return message;
}
}
class MessageEventListener implements ApplicationListener {
public void onApplicationEvent(ApplicationEvent event) {
if (event instanceof MessageEvent) {
MessageEvent messageEvent = (MessageEvent) event;
System.out.println("Received " + messageEvent.getMessage());
}
}
}