How to create a servlet to use WCM API to serve File Resource Component Files

Step by Step process for creating a servlet to serve WCM File Resource Component files
-RAD (Rational Applicaion Developer) > file > new > project > web > dynamic web project > assign project name and ear project name > accept default project facets > assign context root > finish
-Right mouse on project > new > servlet > assign java package name eg "com.ibm.render" > assign class name eg "render" > assign desired url mapping or take default > accept defaults > finish

-Right mouse on project > properties > java build path > add external jars > add ilwwcm-api.jar and ilwwcm-api-impl.jar from portal directory:

:.../ibm/websphere/portalserver/wcm/prereq.wcm/wcm/shared/app

-Paste code (see below) in the servlet java source file

-Right mouse on servlet in RAD Project Explorer > export > ear file > assign location > finish

-Install ear file using WAS Admin Console > applications > enterprise applications > install > enter path to the ear file > use defaults for "select installation options" page > bind the app to websphere portal

-Instead of regenerating the .ear file every time you make a change while testing/developing the servlet, you can copy the .class file for the servlet from the RAD project directory to the deployed location under .../installedApps///.....

-After testing is complete re-export the ear file and "update" the app using WAS Admin Console > applications > enterprise applications > select the application > update > replace all files > take defaults

Sample URL used to invoke the servlet and render a pdf file in file resource component named "1040FileResourceComponent":

http://index.rtp.raleigh.ibm.com:10040/render/Render?name=1040FileResourceComponent&library=Web%20Content

Code for servlet java source file:

 

package com.ibm.render;    Change this to your preferred package name

import java.io.IOException;
import java.io.PrintWriter;
import java.io.*;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.ibm.workplace.wcm.api.exceptions.*;
import com.ibm.workplace.wcm.api.*;

/

• Servlet implementation class for Servlet: Render
  
• 
  
• /
  

public class Render extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
   /* (non-Java-doc)

• @see javax.servlet.http.HttpServlet#HttpServlet()
  
• /
  

public Render() {
super();
}   

/* (non-Java-doc)

• @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  
• /
  

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
TODO Auto-generated method stub

try {


 DocumentId docId=null;

 DocumentIdIterator itemsIterator=null;

 Workspace myworkspace = WCM_API.getRepository().getSystemWorkspace();
   
 if ( myworkspace == null )    {
      System.out.println( "Unable to get a valid workspace" );
    }
 else {
      System.out.println("Found workspace");
    }
   
 myworkspace.login();
 
  Set the workspace to the correct library.
 
 DocumentLibrary MyLibrary = myworkspace.getDocumentLibrary(request.getParameter("library"));
 
 if (MyLibrary == null)
   {
       System.out.println("Library is null
");

   }
 else {

       myworkspace.setCurrentDocumentLibrary(MyLibrary);
   }

itemsIterator = myworkspace.findComponentByName(request.getParameter("name"));

 docId = (DocumentId) itemsIterator.next();
    
 System.out.println("Document id: " + docId.toString());

 LibraryFileComponent myFileComponent = (LibraryFileComponent) myworkspace.getById(docId);

System.out.println("myFileComponent: " + myFileComponent.toString());

 String myFileName = myFileComponent.getFileName();
 
 System.out.println("File Name: " + myFileName);  

 byte[] myFile = myFileComponent.getFile();
 
 int size = myFile.length;
 
 int namesize = myFileName.length();

System.out.println("Bytes loaded...array size = " + myFile.length);

 String nametail = myFileName.substring(namesize-3);
         
 System.out.println("nametail: " + nametail);
 
 if(nametail.equals("pdf")) {
   response.setHeader("Content-Type", "application/pdf");
 }
 else if (nametail.equals("doc")) {
 response.setHeader("Content-Type", "application/msword");
 }
 else
 {
response.setHeader("Content-Type", "text/html");
 }
 
 
 
 OutputStream outputStream = response.getOutputStream();

 outputStream.write(myFile,0, size);
 
     outputStream.flush();

     myworkspace.logout();
     
}

catch (Exception e) {

out.println("Exception " + e.getMessage());
e.printStackTrace();
}

}  

/* (non-Java-doc)

• @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  
• /
  

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
TODO Auto-generated method stub
}         

}