midpsessionlistener.java

本例集中讲解了一下J2ME和J2EE 之间是怎样结合的并通过例子来解释

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package com.sun.j2ee.blueprints.smarticket.web;

import javax.servlet.*;
import javax.servlet.http.*;

/**
 * Listens for session timeouts and performs necessary cleanup.
 */
public class MIDPSessionListener implements HttpSessionListener {

    public void sessionCreated(HttpSessionEvent se) {
	System.err.println("[TRACE]: Started session");
	MIDPService midpService = null;
	try {
	    midpService = new MIDPService();
	} catch (MIDPException ex) {
	    // already reported, can ignore
	}
	se.getSession().setAttribute("midpService", midpService);
    }

    public void sessionDestroyed(HttpSessionEvent se) {
	System.err.println("[TRACE]: Destroying session");
	MIDPService midpService = 
	    (MIDPService) se.getSession().getAttribute("midpService");
	try {
	    midpService.removeMovieInfo();
	} catch (MIDPException ex) {
	    // already reported, can ignore
	}
    }
}