Error while reading UcdContext [trying to read / set application values for users]

Question

Hi,
I am trying to write a program to store user selected values on NW7.3 Portal using "User Content Directory". I can see and read some code snippets on how to set and read the context but I am getting one error after another.
The error message I am getting is
"com.sapportals.portal.pcd.gl.PcdGlContext:service:[email protected]entClassLoader@84507ed@alive incompatible with interface com.sapportals.portal.pcd.gl.IPcdContext:sap.com/[email protected]der@f46d103@alive ". Code snippet is as given below at the end of the message.
1) I tried different ways to have a lookup and always gave message as "look up not found" and for pcd:portal_content came up with above error.
2) Once I read the UCD context, I would like to store some values based on user selection and store them. User may change the values whenever they like and I will be using the values for other purposes in another application.
3) Has any one successful in setting and reading UCD Context in NW 7.3. Will it be possible to share such sample code as the code snippets at http://help.sap.com/saphelp_nw73ehp1/helpdata/en/4a/8e1bce28e24dd8abd9f4de05e5587d/content.htm are not much of use unless I am able to read the UCD.
Thanks for your help!
Regards,
Raju
TestingUCD is my test application and the following is code snippet
InitialContext initialContext = null;
IPcdContext pcdCtx;
Hashtable env = new Hashtable();
env.put(UCD_INITIAL_CONTEXT_FACTORY, UCD_INITIAL_CONTEXT_FACTORY);
env.put(Context.SECURITY_PRINCIPAL, request.getUser());
env.put(Constants.REQUESTED_ASPECT, IPcdAttribute.PERSISTENCY_ASPECT);
try{
initialContext = new InitialContext(env);
//response.write("Before pcdCtx lookup");
try {
pcdCtx = (com.sapportals.portal.pcd.gl.PcdGlContext) initialContext.lookup("pcd:portal_content");
} catch(Exception e){
response.write("Some problem with lookup" + e.getMessage());

Answer 1

Hi,
There are quite few differences in the standard code snippet given by SAP Help on UCD and the once that you put above in the question.
Below is standard snippet.
Hashtable<Object, Object> env = new Hashtable<Object, Object>();
env.put(Context.INITIAL_CONTEXT_FACTORY,
IPcdContext.UCD_INITIAL_CONTEXT_FACTORY);
env.put(Context.SECURITY_PRINCIPAL, user);
InitialContext ctx = new InitialContext(env);
pcdCtx =  (IPcdContext) ctx.lookup("");
============================
Check the ones highlighted in BOLD and compare them in your code. In your code when ur doing initial lookup you are not using the Correct class type cast for the returned lookup object!
Your code shows as below:
pcdCtx = (com.sapportals.portal.pcd.gl.PcdGlContext) initialContext.lookup("pcd:portal_content");
But may be it shd have been something like below:
pcdCtx = (IPcdContext) initialContext.lookup("pcd:portal_content");
Pls verify and hopefully this resolves your issues around look up.
Thanks,
Swapna Priya.