Java by API/javax.servlet.http/HttpSessionBindingEvent

HttpSessionBindingEvent: getName()

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletContext;
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 javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
public class SessionBindings extends HttpServlet {
  public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException,
      IOException {
    res.setContentType("text/plain");
    PrintWriter out = res.getWriter();
    // Get the current session object, create one if necessary
    HttpSession session = req.getSession();
    // Add a CustomBindingListener
    session.setAttribute("bindings.listener", new CustomBindingListener(getServletContext()));
    out.println("This page intentionally left blank");
  }
}
class CustomBindingListener implements HttpSessionBindingListener {
  ServletContext context;
  public CustomBindingListener(ServletContext context) {
    this.context = context;
  }
  public void valueBound(HttpSessionBindingEvent event) {
    context.log("[" + new Date() + "] BOUND as " + event.getName() + " to "
        + event.getSession().getId());
  }
  public void valueUnbound(HttpSessionBindingEvent event) {
    context.log("[" + new Date() + "] UNBOUND as " + event.getName() + " from "
        + event.getSession().getId());
  }
}

HttpSessionBindingEvent: getSession()

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletContext;
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 javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
public class SessionBindings extends HttpServlet {
  public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException,
      IOException {
    res.setContentType("text/plain");
    PrintWriter out = res.getWriter();
    // Get the current session object, create one if necessary
    HttpSession session = req.getSession();
    // Add a CustomBindingListener
    session.setAttribute("bindings.listener", new CustomBindingListener(getServletContext()));
    out.println("This page intentionally left blank");
  }
}
class CustomBindingListener implements HttpSessionBindingListener {
  ServletContext context;
  public CustomBindingListener(ServletContext context) {
    this.context = context;
  }
  public void valueBound(HttpSessionBindingEvent event) {
    context.log("[" + new Date() + "] BOUND as " + event.getName() + " to "
        + event.getSession().getId());
  }
  public void valueUnbound(HttpSessionBindingEvent event) {
    context.log("[" + new Date() + "] UNBOUND as " + event.getName() + " from "
        + event.getSession().getId());
  }
}