Jain Sip processRequest method not being called

Question

I am writing an application in Java to make calls and view when people are in calls, their phone is ringing or are idle, using the library Jain-Sip and at the moment am trying to correctly implement presence with SUBSCRIBE and NOTIFY messages. I am able to get presence data to be received, but after a while the presence data stops being displayed by my program.

I believe this is because the overridden method "processRequest" is not being called. This is the earliest point in the program where NOTIFY messages are being handled and not even the print statements are being output.

The bizarre thing about this is that the notify messages are being sent when I make calls, and the presence data is there. I know this because I have done Wireshark traces when running the program.

Note: No exceptions are occurring during execution of the program, to cause erroneous behaviour.

If anybody has any insight into why this is happening, I would be very grateful.

Thanks a lot, Adam

Answer 1

Make sure you add your listener class correctly. The only other possible cause would be if the NOTIFY is unsolicited, which should not be the case but it happens. Try to enable this flag gov.nist.javax.sip.DELIVER_UNSOLICITED_NOTIFY. See more about it here https://jsip.ci.cloudbees.com/job/jsip/javadoc/gov/nist/javax/sip/SipStackImpl.html

Otherwise you will need to attach DEBUG logs to figure it out, could be malformed request or something of the sort.