Automated generation of service definitions for message queue application clients

A method for use in a computer system including a plurality of application instances and respectively corresponding message queues, the method comprising:

• retrieving a middleware application programming interface (API) trace of interactions between the plurality of application instances and their respectively corresponding message queues, with the API trace including a plurality of programmable command format (PCF) messages, each PCF message representing a connection to a message broker in the message brokering system and for long running applications, application use time;
• analyzing, by machine logic, the plurality of PCF messages;
• merging, by machine logic, the plurality of PCF messages into a plurality of merged PCF message, with each merged PCF message corresponding to the messages communicated by one application instance of the plurality of application instances and/or its respectively corresponding message queue;
• extracting, by machine logic, extracted information from the plurality of merged PCF messages;
• and
• for each given application instance of the plurality of application instances, discovering a message exchange pattern (MEP) and determining a confidence score for the discovered MEP;
• and, on condition that the confidence score is determined to be low, identifying the MEP as a two-way operation pattern, but otherwise identifying the MEP as a one-way operation and generating, by machine logic, a web services description language (WSDL) formatted service definition document for the given application instance based, at least in part, upon the extracted information, with the service definition document for the given application instance including information indicative of computational services provided by the given application instance when the given application instance performs as an application client of a message broker and the discovered MEP as identified.

A computer program product for automatically generating model documents, the computer program product comprising:

• a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:
• computer readable program code for retrieving a middleware application programming interface (API) trace of interactions between different application instances and corresponding message queues in a message brokering system each of the different application instances having a connection with a corresponding one of the message queues, the trace having a form of programmable command format (PCF) messages, each PCF message representing a connection to a message broker in the message brokering system and for long running applications, application use time;
• computer readable program code for analyzing the PCF messages in the trace and merging any of the PCF messages in the trace representing a same connection between a same one of the different application instances and a corresponding one of the message queues and further merging any of the PCF messages in the trace representing a same one of the application instances so as to reduce the PCF messages in the trace to include PCF references for unique application instances, the merger of the PCF messages producing a reduced set of PCF messages from the trace, extracting information from the reduced set of the PCF messages and indicating an accuracy of the extracted information identifying the application instances and related message exchange data;
• computer readable program code for identifying the application instances and related message exchange data;
• computer readable program code for discovering a message exchange pattern (MEP) and determining a confidence score for the discovered MEP;
• and,
• computer readable program code for, on condition that the confidence score is determined to be low, identifying the MEP as a two-way operation pattern, but otherwise identifying the MEP as a one-way operation and,
• computer readable program code for generating a web services description language (WSDL) formatted service definition document for each identified application instance using the related message exchange data to describe in WSDL statements contained in the WSDL formatted service definition document, computational services provided by the identified application instance and including the discovered MEP as identified.