Worklist callback cancel not working.

[anilta]

I have created a MWL callback function, our own, same like "DcmFindSCUCallback".
We are querying for only 200 MWL entries. There are 2000 .wl lists in Worklist server, we use wlmscpfs.

We maintain a count, and once we receive, we request cancel,

Code: Select all

 
struct ProgressCallbackInfo
{
   T_ASC_Association          *assoc;
   T_ASC_PresentationContextID presId;
   void                       *instance;
};

if (maxResultsExceeded)
   {
        ProgressCallbackInfo *myCallbackData = OFstatic_cast(ProgressCallbackInfo*, pCallbackData);
        if (myCallbackData && pRequest)
       {
         const OFCondition cond = DIMSE_sendCancelRequest(myCallbackData->assoc, myCallbackData->presId, pRequest->MessageID);
         if (cond.bad())
         {
                     // LOG ...
         }
      }
   }

Even though, after 200, we send cancel request, we still receive 2000 callbacks.

Is there any thing missing in my code?

[J. Riesmeier]

Did you already check the log output on the SCP side, i.e. whether the C-CANCEL-RQ has been received?

By the way, the "findscu" command line tool also has a --cancel option, which might help for testing purposes:

Code: Select all

  other network options:
          --cancel              [n]umber: integer
                                cancel after n responses (default: never)

[anilta]

Yes. I see clearly, our Cancel messages going to the server and displayed in their log windows.
I tested in both JDicom and wlmscpfs servers.

We expect the Service Class Providers should send us the last Worklist with "Success" after we send cancel command.

Or we should close the association forcibly after we send cancel?

[J. Riesmeier]

According to the DICOM standard (PS 3.4 Section K.4.1.3), you'll get a DIMSE status of FE00H (cancel) from the SCP.