Processing transactions using a multi-purpose callout processor

A computer system comprising:

• a memory;
• and
• a processor system communicatively coupled to the memory;
• the processor system configured to perform a method comprising:
• receiving a transaction input from an external client application, wherein the processor system comprises a multi-purpose callout processor, the transaction input comprises a request to perform a specific functionality by a transaction processing system, and the multi-purpose callout processor implements a multi-purpose application program interface between the external client application and the transaction processing system;
• and
• performing a callout based on the transaction input, wherein the multi-purpose callout processor is configured to perform a plurality of types of callouts.

A computer program product comprising:

• a computer-readable storage medium having program instructions embodied therewith, the program instructions readable by a processor system to cause the processor system to perform a method comprising:
• receiving, by a multi-purpose callout processor, a transaction input from an external client application, wherein the transaction input comprises a request to perform a specific functionality by a transaction processing system, and the multi-purpose callout processor implements a multi-purpose application program interface between the external client application and the transaction processing system;
• and
• performing a callout based on the transaction input, wherein the multi-purpose callout processor is configured to perform a plurality of types of callouts.