Transaction tracking for high availability architecture using a tracking token and middleware instance information

A system for providing transaction affinity for transactions comprised of multiple requests, the system comprising:

• a memory having computer readable instructions;
• and
• one or more processors for executing the computer readable instructions, the computer readable instructions controlling the one or more processors to perform operations comprising:
• receiving, at an application server, a first request from a client, the first request corresponding to a start of a transaction comprising multiple requests;
• based on receiving the first request from the client:
• generating, at the application server, a transaction tracking token;
• processing, at the application server, the first request, the processing the first request comprising sending the first request with the transaction tracking token to a gateway;
• and
• receiving, at the application server, a first response corresponding to the first request from the gateway, the first response comprising middleware instance information corresponding to a middleware instance selected by the gateway for the transaction in response to receiving the first request, the middleware instance selected by the gateway from a plurality of middleware instances based at least in part on a functionality of the middleware instance required by the transaction;
• subsequent to receiving the first request, receiving, at the application server, a second request from the client, the second request corresponding to the transaction;
• and
• processing, by the application server, the second request based at least in part on the previously generated transaction token and on the middleware instance information corresponding to the previously selected middleware instance, the processing the second request comprising sending the second request to the gateway with the middleware instance information.

A non-transitory computer program product for providing transaction affinity for transactions comprised of multiple requests, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by one or more processors to cause the one or more processors to perform operations comprising:

• receiving, at an application server, a first request from a client, the first request corresponding to a start of a transaction comprising multiple requests;
• based on receiving the first request from the client:
• generating, at the application server, a transaction tracking token;
• processing, at the application server, the first request, the processing the first request comprising sending the first request with the transaction tracking token to a gateway;
• and
• receiving, at the application server, a first response corresponding to the first request from the gateway, the first response comprising middleware instance information corresponding to a middleware instance selected by the gateway for the transaction in response to receiving the first request, the middleware instance selected by the gateway from a plurality of middleware instances based at least in part on a functionality of the middleware instance required by the transaction;
• subsequent to receiving the first request, receiving, at the application server, a second request from the client, the second request corresponding to the transaction;
• and
• processing, by the application server, the second request based at least in part on the previously generated transaction token and on the middleware instance information corresponding to the previously selected middleware instance, the processing the second request comprising sending the second request to the gateway with the middleware instance information.