MQSeries.net :: View topic

drgincbia · Posted: Wed Feb 11, 2004 8:03 am Post subject:

We want to run the workflow applications in a separate JVM than the WebClient, so that each application does not impact the stability of the WebClient and other workflow applications. Here is what has been tried, but does not work. Can someone give us pointers on what code needs to change to accomplish this?

Target environment

WAS Ver 5.0.2 on AIX Ver 5.1, Workflow 3.4 SP 4

Summary

We have written a sample Web application (TEST) that interacts with the WF WebClient. The WebClient is currently installed to Application server (JVM1) within a Cluster (Cluster1) and the TEST application is also installed to the same Application server (JVM1) within the same Cluster (Cluster1). By installing the application this way both the application works well using the code below.

Question

We would like to move the TEST application to a different Application Server (JVM2) within a different Cluster (Cluster2) , so we can maintain the applications individually without impacting one another. (Recycle JVM2 without disturbing other WF applications, or other WF applications may not be impacted when the TEST application is being redeployed)

Configuration that did not work with the same code below

We tried to install the TEST to JVM2 in Cluster2 and got an error 500.

Sequential flow of the Sample application

1. The user logs into the WF WebClient application and sees his/her workitem.
2. User clicks on the workitem that launches the custom jsp (INF_JVMDocs.jsp ) in the /programs/ folder.
3. The custom jsp then forwards the user to a servlet (TestServlet ) in the TEST application
4. The servlet stores the context root of the WF in a session then transfers control to the JVMDocs.jsp within the TEST application
5. The jsp (JVMDocs.jsp) uses the session information to transfer the control back to the Workitem in the WF WebClient application

Sample source code that is being used

INF_JVMDocs.jsp located in WebClient /programs/ folder
TestServlet in the TEST application



<%@ page language="java" %>
<%!
ServletContext mycontext;
String Testcontext ="/test";
public void jspInit() {
mycontext = getServletConfig().getServletContext();

}
%>
<%

ServletContext context = mycontext.getContext(Testcontext);
RequestDispatcher rd = context.getRequestDispatcher("/TestServlet");
rd.forward(request,response);

%>

/*
* TestServlet
*/
import java.io.IOException;

import javax.servlet.RequestDispatcher;
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.ibm.workflow.servlet.client.RequestContext;

/**
* @version 1.0
* @author
*/
public class TestServlet extends HttpServlet {

/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req,resp);

}

/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
RequestContext mqcontext = (RequestContext) req.getAttribute("context");
HttpSession ses = req.getSession(true);
ses.setAttribute("mqcontext", mqcontext);
RequestDispatcher rd = req.getRequestDispatcher("/test.jsp");
rd.forward(req,resp);

}

}

Suggestions?
_________________
D. Grandia