sessiontracker.java

Struts+Spring开发

package org.ssi.Listener;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

public class SessionTracker implements HttpSessionListener {

	private static Map activeSessions = new HashMap();

	public void sessionCreated(HttpSessionEvent event) {
		HttpSession session = event.getSession();
		synchronized (activeSessions) {
			activeSessions.put(session.getId(), session);
		}
	}

	public void sessionDestroyed(HttpSessionEvent event) {
		HttpSession session = event.getSession();
		synchronized (activeSessions) {
			activeSessions.remove(session.getId());
		}
	}

	public static void closeAllSessions() {
		synchronized (activeSessions) {
			for (Iterator i = activeSessions.entrySet().iterator(); i.hasNext();) {
				Map.Entry entry = (Map.Entry) i.next();
				String sessionId = (String) entry.getKey();
				HttpSession session = (HttpSession) entry.getValue();
				session.invalidate();
				i.remove();
			}
		}
	}

}