Monitoring messages in a distributed data processing system

A system for monitoring messages in a distributed data processing system, the system comprising:

• means for putting a message containing a monitoring token on a queue on a server;
• means for receiving a call to get the message from the queue on the server;
• means for determining, with an API exit running on the server, whether the call to get the message is made by a process running on a remote client or by a process running on the server;
• and
• means for removing the monitoring token from the message with the API exit.

A computer program product for monitoring messages in a distributed data processing computer program product, the computer program product comprising:

• a recording medium;
• means, recorded on the recording medium, for putting a message containing a monitoring token on a queue on a server;
• means, recorded on the recording medium, for receiving a call to get the message from the queue on the server;
• means, recorded on the recording medium, for determining, with an API exit running on the server, whether the call to get the message is made by a process running on a remote client or by a process running on the server;
• and
• means, recorded on the recording medium, for removing the monitoring token from the message with the API exit.