Subscriber message payload handling

A computer-implemented method for modified payload data handling in a publish/subscribe system, comprising:

• receiving a first message published by a first publisher, the first message comprising a message header and payload data;
• identifying the payload data within the received first message;
• extracting and storing the payload data of the received first message;
• receiving a second message published by a second publisher, the second message comprising function data that provides a function to modify the payload data of the received first message;
• identifying the function data within the received second message;
• extracting and storing the function data of the received second message;
• using the function of the stored function data of the received second message to modify the extracted and stored payload data of the received first message;
• and
• creating a third message comprising the modified payload data of the received first message for distribution to a subscriber programmed to process the modified payload data in the third message.

A computer program product comprising a computer readable storage device including computer readable program code, where the computer readable program code when executed on a computer causes the computer to:

• receive a first message published by a first publisher, the received first message comprising a message header and payload data;
• identify the payload data within the received first message;
• extract and store the payload data of the received first message;
• receive a second message published by a second publisher, the received second message comprising function data that provides a function to modify the payload data of the received first message;
• identify the function data within the received second message;
• extract and store the function data of the received second message;
• use the function of the stored function data of the received second message to modify the extracted and stored payload data of the received first message;
• and
• create a third message comprising the modified payload data of the received first message for distribution to a subscriber programmed to process the modified payload data in the third message.