HazelcastSessionReplication.java

package com.hazelcast.HazelcastSessionReplication;

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 java.io.IOException;
import java.util.Enumeration;

public class HazelcastSessionReplication extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession session = request.getSession();
        if (session.isNew()) {
            request.setAttribute("isNewTest", "Session is created first time.");
        } else {
            request.setAttribute("isNewTest", "Session already created");
            session.setMaxInactiveInterval(120);
        }

        if (request.getParameter("action") != null) {
            if (request.getParameter("action").equals("Set Attribute") && request.getParameter("key") != null
                    && !request.getParameter("value").equals("null")) {
                session.setAttribute(request.getParameter("key"), request.getParameter("value"));
            }

            if (request.getParameter("action").equals("Get Attribute") && request.getParameter("key") != null) {
                request.setAttribute("getKey", session.getAttribute(request.getParameter("key")));
            }

            if (request.getParameter("action").equals("Delete Attribute") && request.getParameter("key") != null) {
                session.removeAttribute(request.getParameter("key"));
            }
        }

        Enumeration names = session.getAttributeNames();
        StringBuilder sb = new StringBuilder();
        sb.append("<table border=\"1\"><th>Key</th><th>Value</th>");
        while (names.hasMoreElements()) {
            String name = (String) names.nextElement();
            sb.append("<tr><td>").append(name).append("</td><td>").append(session.getAttribute(name)).append("</td></tr>");
        }
        sb.append("</table>");
        String res = sb.toString();

        request.setAttribute("res", res);
        request.getRequestDispatcher("/hazelcast.jsp").forward(request, response);
    }
}