asked on

JSP Redirection

Hello everybody,

I'm working with servlets in a project. I have 5 servlets and I need the comunication between them. I am communicate them with the context and for initialize the servlets I 'm doing with the response.sendredirect(path).
The trouble that I have its that I need to redirect the servlet to a jsp. I tried with getServletContext().getRequestDispatcher("/SG_ConfigServCentral.jsp").forward(request, response); But I get an exception (java.lang.IllegalStateException: WEB2645: Cannot forward after response has been committed) and I tried with include instead of forward but didn't work too.

Can anyone help me please?

Thanks a lot

ASKER CERTIFIED SOLUTION

mark-b

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SOLUTION

wolfc

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epadilla

ASKER

Hello again,

Yes I did something with the response, because I did the response.sendRedirect(path of the other servlets), so my question is if I can redirect a jsp afterI worked with the response. Here is my code

public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException
{
String stOption;
int inOption;
ServletContext scContext;
HttpServletResponse htResponse;

scContext = this.getServletConfig().getServletContext();

stOption = request.getParameter("param0");
inOption = Integer.parseInt(stOption);

switch (inOption)
{
case 0:

bsInitHostServlets(response);

if (inServletsCounter == -1)
{
asSpooler = (SG__Servlet) scContext.getAttribute("Servlet");
bosSpooler = (SG__Servlet2) scContext.getAttribute("Servlet2");
sb_InitCloseSockets();
tbThreadVector.inInterfaceServlet = asSpooler;
tbThreadVector.inInterfaceServlet2 = bosSpooler;
}
break;

case 2:
bs_voPrintSpooler();
break;

}
response.setContentType(CONTENT_TYPE);

PrintWriter out = response.getWriter();

scContext.getRequestDispatcher("/jsp/SG_ConfigServCentral.jsp").include(
request, response);

public void bsInitHostServlets(HttpServletResponse response) throws
IOException
{
String stPath = "";

stPath = bsReturnServletPath(inServletsCounter, true);

if (stPath != "")
{
try
{
response.sendRedirect(stPath);
inServletsCounter++;
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
else
inServletsCounter = -1;
}

public String bsReturnServletPath(int inServletNumber, boolean boAllSer)
{
String stPath = "";
String stParam;

if (boAllSer == true)
stParam = "param0=0";
else
stParam = "param0=1";

switch (inServletNumber)
{
case 0:
stPath = "/sg_comms_servlet?" + stParam;
break;

case 1:
stPath = "/sg_servlet1?" + stParam;

break;

case 2:
stPath = "/sg_servlet2?" + stParam;

break;
}
return stPath;
}

Thanks a lot.

epadilla

ASKER

Another comment, I am using the JBuilder and this exception only appear when I upload my project to iPlanet Web Server 6.0. Because when I compile in the JBuilder it works fine.

Thanks

SOLUTION

Mick Barry

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epadilla

ASKER

Well I need to do the following:

Servlet1 is the base of all my project, and I want that Servlet1 communicate with Servlet2 for initialize some proccess, and I need that Servlet2 return the control to Servlet1, I did it with parameters, like this:

SERVLET 1

response.sendRedirect(Path of servlet2?param=0);

SERVLET 2

response.sendRedirect(Path of Servlet1?param=0);

After that I need to display a JSP for the user.

Any other idea for try to do this??

Mick Barry

doesn't sound like its a redirect you need, you cannot share processing between servlets.
once a servlet has redirected it should return.

wolfc

At what line to you get the IllegalStateException, because after a sendRedirect you're not allowed to do anything as well. :-)