Problem with communication between servlets!!!!!!

Jochen Vastmans Thu, 20 Jan 2000 19:50:24 -0800

Hi,

I'm new to servlets...

What i want to do:

In a servlet(LookupCD) i create an instance of an Enterprise JavaBean(session bean).
The servlet generates an html-page with all info of an entitybean and also a link.
When i click on this link it starts up a new servlet but i want to pass that instance
of the sessionbean on to this new servlet(AddToBasket)

I know that this is possible with the request dispatcher, and to set Attribute on request

So when i click the link the requestdispatcher must be called...
I have added some code of the lookupCD servlet.

Can you tell me what i have to change in this code-example???

Best Regards,

Jochen Vastmans
[EMAIL PROTECTED]

// CODE

public class LookupCompactDisc extends HttpServlet implements SingleThreadModel{

public void init(ServletConfig config) throws ServletException {

    super.init(config);

    initiate(); //creates an instance of the sessionbean - cs -> (CustSession)

    context = config.getServletContext();
}

public void doGet(HttpServletRequest req, HttpServletResponse res){
//delagate to doPost
doPost(req,res);
}

public void doPost(HttpServletRequest req, HttpServletResponse res){

try {
 String artist=req.getParameter("artist").toLowerCase();
 String title=req.getParameter("title").toLowerCase();

 // Vector with instances of the entitybean - (CompactDisc)
 Vector compactdiscs=cs.lookupCompactDisc(artist,title);

 // HERE A ADDED -cs- AS ATTRIBUTE
 req.setAttribute("CustSession",(CustSession) cs);

 // this will generate html
 res.setContentType("text/html");
 PrintWriter out = res.getWriter();
 if(compactdiscs == null)
 out.println("No item was found.");
 else{
 out.println("<html><head></head><body>");

for(int i=0;i<compactdiscs.size();i++){

Functions f = new Functions();
CompactDisc cd = (CompactDisc) compactdiscs.elementAt(i);
long id = cd.getID();
String pid = String.valueOf(id);
String cdname = f.toUpperCase(cd.getArtist());
String cdtitle = f.toUpperCase(cd.getTitle());
String cdrc = f.toUpperCase(cd.getRecordCompany());
double cdprice = cd.getPriceEuro();
String price = String.valueOf(cdprice);

out.println(""+cdname+" ");
out.println(cdtitle+" ");
out.println(cdrc+" ");
out.println("Price: "+price+" euro");

// HERE IS MY PROBLEM!!!!
// HERE IS THE LINK TO START THE OTHER SERVLET
// I want to pass the sessionbean -cs- on to AddToBasket
// when the link is clicked...
out.println("<a href="+"http://<my host>/servlets.customer.AddToBasket?id="+pid+">Buy Item</a>");
 // I think it should be
 context.getRequestDispatcher("/servlet.customer.AddToBasket").forward(req,res);
 }

out.println("</form></body></html>");
 }
}
catch (Exception e) {
e.printStackTrace();
}
 }
....
}

Problem with communication between servlets!!!!!!

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