HttpSesstionActivationLIstener示例

HttpSesstionActivationLIstener示例：

http://www.cnblogs.com/xdp-gacl/p/3969249.html

钝化的session会已sessionid为文件名，存储于apache-tomcat-7.0.35workCatalinalocalhostTestBootWebstono目录下面；

META-INF/context.xml:

<Context>
    <Manager className="org.apache.catalina.session.PersistentManager" maxIdleSwap="1">
        <Store className="org.apache.catalina.session.FileStore" directory="stono" />
    </Manager>
</Context>

HttpSessionActivationListener:

package com.stono.servlet.listeners;
import java.io.Serializable;
import javax.servlet.http.HttpSessionActivationListener;
import javax.servlet.http.HttpSessionEvent;
/* 文档中提到进行JVM迁移的时候才能激发此事件； */
public class MyHttpSessionActivationListener implements HttpSessionActivationListener, Serializable {
    private static final long serialVersionUID = 1L;
    public MyHttpSessionActivationListener() {
    }
    public MyHttpSessionActivationListener(String name) {
        this.name = name;
    }
    private String name;
    public String getName() {
        return name;
    }
    @Override
    public void sessionDidActivate(HttpSessionEvent arg0) {
        System.out.println("com.stono.servlet.listeners.MyHttpSessionActivationListener.sessionDidActivate(HttpSessionEvent):" + arg0.getSession().getId());
    }
    @Override
    public void sessionWillPassivate(HttpSessionEvent arg0) {
        System.out.println("com.stono.servlet.listeners.MyHttpSessionActivationListener.sessionWillPassivate(HttpSessionEvent):" + arg0.getSession().getId());
    }
    public void setName(String name) {
        this.name = name;
    }
}

servlet:

package com.stono.servlet.listenerorder;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.stono.servlet.listeners.MyHttpSessionActivationListener;
public class TestServlet1 extends HttpServlet {
    private static final long serialVersionUID = 1L;
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession();
        session.setAttribute("a", new MyHttpSessionActivationListener("stono"));
        PrintWriter writer = resp.getWriter();
        writer.println("this is from com.stono.servlet.listenerorder.TestServlet1");
    }
}