ContextRefreshedEvent And ApplicationListener In Spring

This example shows how to use ApplicationListener in Spring framework. If you implement your own listener with the use of ApplicationListener, you can invoke the method at the start up of the spring application.

SpringContextListener.java

package javabeat.net.controller;

import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;

@Component
public class SpringContextListener implements ApplicationListener<ContextRefreshedEvent> {
	public void onApplicationEvent(ContextRefreshedEvent event) {
		System.out.println("ApplicationListener Invoked At Spring Container Startup");
	};
}

spring4-mvc-dispatcher-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:websocket="http://www.springframework.org/schema/websocket"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="

http://www.springframework.org/schema/beans


http://www.springframework.org/schema/beans/spring-beans.xsd


http://www.springframework.org/schema/context


http://www.springframework.org/schema/context/spring-context.xsd


http://www.springframework.org/schema/websocket


http://www.springframework.org/schema/websocket/spring-websocket-4.0.xsd">

<context:component-scan base-package="javabeat.net.controller" />
<context:property-placeholder location="classpath:application.properties"/>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

id="WebApp_ID" version="3.0">
<display-name>Spring MVC 4.0 Web Application</display-name>
	<servlet>
		<servlet-name>spring4-mvc-dispatcher</servlet-name>
		<servlet-class>
			org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>spring4-mvc-dispatcher</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

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He is Founder and Chief Editor of JavaBeat. He has more than 8+ years of experience on developing Web applications. He writes about Spring, DOJO, JSF, Hibernate and many other emerging technologies in this blog.

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