XML file is not being displayed in browser? Why?

Question

Hi all!
I have a secnario file->XI->J2EE appl.
I am using  File sender adapter and HTTP Receiver adapter.
I placed XML file in D:\somedir of my machine, it is picking up well by XI, <b>all i want to know is how XI sends this XML file to my J2EE Appl.</b>Because my servlet should display the same XML file in browser. I deployed my J2EE appl on weblogic application server9.0 I am getting the following error:
The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and then click the Refresh button, or try again later.
XML document must have a top level element. Error processing resource 'http://localhost:7001/Invoke/DisplayRes'.
These are settings that i have given in my Receiver HTTP adapter:
Aadapter Type: HTTP
                   Receiver
Transport Protocol:  HTTP1.0
Message Protocol:    XI payload in HTTP body
Adapter Engine:      Integration Server
Addressing Type:     URL address
Target host:         localhost
Service Number:      7001(Port number of Weblogic appl server--where my J2EE appl is deployed).
Path     :  /Invoke/DisplayRes/(Context path of J2EE appl)
Authentication Type:Use Logon Data for SAP System
Content Type: text/xml
Username:   xiappluser
password:   xx
XML code:   UTF-8
This is my Servlet code:
public class DisplayRes extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
     doPost(request,response);
     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
     BufferedReader brin =new BufferedReader(new InputStreamReader(request.getInputStream()));
     String inputLine;
     StringBuffer sBuf = new StringBuffer();
     PrintWriter out = response.getWriter();
     response.setContentType("text/xml");
     while ((inputLine = brin.readLine()) != null)
         sBuf.append(inputLine);
           out.println(sBuf.toString());
          brin.close();
         out.flush();
Where i went wrong please help me,
NOTE: I want to know how XI sends XML file to my J2EE appl. I suppose my servlet receives it in request object.If so can i use like:
response.setContentType("text/xml");
  String xmlFile = request.getParameter("myXMLFile");
  PrintWriter out = response.getWriter();
  out.write(xmlFile);
  out.flush();
  out.close();
Please help me!
Thanks a lot!

Answer 1

Hi Datta,
You seem to have big problem with this scneario as you have raised this question couple of times , in couple of topics / threads. I will try to make a few things about this clear.
1. XI when sends data to a J2EE application , in your case a servlet, I believe you must be using a HTTP adapter to post the data to it. Whenever XI will post a XML data to a HTTP resource , it will post it as the request body and that is why the code in one of my previous post reads,
BufferedReader brin =new BufferedReader(new InputStreamReader(request.getInputStream()));
String inputLine;
StringBuffer sBuf = new StringBuffer();
PrintWriter out = response.getWriter();
response.setContentType("text/xml");
while ((inputLine = brin.readLine()) != null)
sBuf.append(inputLine);
out.println(sBuf.toString());
brin.close();
out.flush();
If you 've noticed, the statement
request.getInputStream()
retrieves the body of the request as binary data using a ServletInputStream.
So your answer to your question is
<b>XI transferes data to a servlet as a part of HTTP request body</b>, if you use a HTTP adapter.
2. By J2EE application , if you mean a server java proxy, then the method whose name matches with that of the Inbound Message interface recieves a parameter , from which you can retrieve the parameters passed by XI. Just check the getters of that object.
Hope this clears your basic doubts!!!
Rgds,
Amol