系统启动时队列自动下单--ServletContextListener

package com.liying.pear.queue;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.log4j.Logger;

import com.liying.monkey.core.util.BeanFactory;
import com.liying.pear.web.order.service.OrderService;

/**
* 进程监听器
*
* @author jqlin
*
*/
public class ProcessingListener implements ServletContextListener {
private static final Logger logger = Logger.getLogger(ProcessingListener.class);

@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
final OrderService ticketService = BeanFactory.getBean(OrderService.class);
if(ticketService == null) {
logger.warn("没有匹配的下单服务：" + OrderService.class.getName());
return;
}

new Thread(new Runnable() {
@Override
public void run() {
ticketService.initSendOrder();
}
}).start();
}

@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {

}
}

布署 ServletContextListener
你实现(implements)了 ServletContextListener 编译后，把它放在正确的WEB-INF/classes目录下，更改WEB-INF目录下的 web.xml文件，在web-app节点里添加：

<listener>
<listener-class>com.liying.pear.queue.ProcessingListener</listener-class>
</listener>