servicelifemonitor.java

《j2ee开发全程实录》随书源码

package com.cownew.PIS.framework.server.lifeMgr;

import java.util.ArrayList;
import java.util.List;



public class ServiceLifeMonitor
{
	private List listenerList;
	
	private String sessionId;

	public ServiceLifeMonitor(String sessionId)
	{
		listenerList = new ArrayList();
		this.sessionId = sessionId;
	}
	
	public void addServiceLifeListener(IServiceLifeListener listener)
	{
		listenerList.add(listener);
	}
	
	public void removeListener(IServiceLifeListener listener)
	{
		listenerList.remove(listener);
	}
	
	public void removeAllListener()
	{
		listenerList.clear();
	}
	
	public void beforeInvoke() 
	{
		for (int i = 0, n = listenerList.size(); i < n; i++)
		{
			IServiceLifeListener listener = (IServiceLifeListener) listenerList
					.get(i);
			listener.beforeInvoke(sessionId);
		}
	}
	
	public void afterInvoke() 
	{
		for (int i = 0, n = listenerList.size(); i < n; i++)
		{
			IServiceLifeListener listener = (IServiceLifeListener) listenerList
					.get(i);
			listener.afterInvoke(sessionId);
		}
		removeAllListener();
	}
	
}