Tomcat Cluster Testing
A sample test file (sesstest.jsp):
<%@page language="java" %>
<html>
<body>
<h1><font color="red">Session serviced by machine1</font></h1>
<table align="center" border="1">
<tr>
<td>
Session ID
</td>
<td>
<%= session.getId() %></td>
</td>
<% session.setAttribute("abc","abc");%>
</tr>
<tr>
<td>
Created on
</td>
<td>
<%= session.getCreationTime() %>
</td>
</tr>
</table>
</body>
</html>
Put the above file on each instance and change the machine name.
Another test file:
<%@page import="java.util.ArrayList"%>
<%@page import="java.util.Date"%>
<%@page import="java.util.List"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<title>JSP Page</title>
<span style="color: blue; font-size: small;">Instance 1 </span>
<hr>
<span style="color: #cc0000; font-size: small;">
Session Id : <%=request.getSession().getId()%>
Is it New Session : <%=request.getSession().isNew()%>
Session Creation Date : <%=new Date(request.getSession().getCreationTime())%>
Session Access Date : <%=new Date(request.getSession().getLastAccessedTime())%>
</span>
<b>Cart List </b>
<hr>
<ul>
<%
String bookName = request.getParameter("bookName");
List<string> listOfBooks = (List<string>) request.getSession().getAttribute("Books");
if (listOfBooks == null) {
listOfBooks = new ArrayList<string>();
request.getSession().setAttribute("Books", listOfBooks);
}
if (bookName != null) {
listOfBooks.add(bookName);
request.getSession().setAttribute("Books", listOfBooks);
}
for (String book : listOfBooks) {
out.println("<li>"+book + "</li>");
}
%>
</ul>
<hr>
<form action="index.jsp" method="post">
Book Name <input name="bookName" type="text">
<input value="Add to Cart" type="submit">
</form>
<hr>
How to test session replication?
- Ensure that the <Cluster>, <Manager> elements are uncommented, and make sure that the <Context> element is commented out on all instances.
- Start all instances
- Start Apache server with mod_jk or mod_proxy
- Open a browser to http://load-balancer-ip/example/jsp/sesstest.jsp
- Check that its working correctly, then shutdown the instance that had your session
- Retest using the browser and hopefully it should pickup the other instance but have the same session ID
page revision: 1, last edited: 06 Apr 2014 22:04
