Java/Spring/ApplicationListener
Implements ApplicationEventPublisherAware
<source lang="java">
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); }
}
</source>
Implements ApplicationListener
<source lang="java">
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); }
}
</source>