Mega Code Archive
Implements ApplicationListener
<![CDATA[
File: context.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="heartbeatTask" class="HeartbeatTask"/>
<bean id="scheduledTask" class="org.springframework.scheduling.timer.ScheduledTimerTask">
<property name="timerTask"><ref local="heartbeatTask"/></property>
<property name="period"><value>1000</value></property>
</bean>
<bean id="timerFactory" class="org.springframework.scheduling.timer.TimerFactoryBean">
<property name="scheduledTimerTasks">
<list>
<ref local="scheduledTask"/>
</list>
</property>
</bean>
<bean id="heartbeatForwarder" class="HeartbeatForwarder"/>
</beans>
File: Main.java
import java.util.TimerTask;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
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");
Thread.sleep(30 * 1000);
}
}
class HeartbeatTask extends TimerTask implements ApplicationEventPublisherAware {
private ApplicationEventPublisher eventPublisher;
public void run() {
HeartbeatEvent event = new HeartbeatEvent(this);
eventPublisher.publishEvent(event);
}
public void setApplicationEventPublisher(ApplicationEventPublisher eventPublisher) {
this.eventPublisher = eventPublisher;
}
}
class HeartbeatForwarder implements ApplicationListener {
public void onApplicationEvent(ApplicationEvent event) {
if (event instanceof HeartbeatEvent) {
System.out.println("Received heartbeat event: " + event.getTimestamp());
}
}
}
class HeartbeatEvent extends ApplicationEvent {
public HeartbeatEvent(Object source) {
super(source);
}
}
]]>