Dynamic queue alias

A computer program product comprising:

• one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising:
• program instructions to, responsive to receiving a message that includes respective target cache information including a target name and a change flag count from an application for a queue alias of a queue manager, enable dynamic routing of the message between a plurality of data centers, wherein a first data center of the plurality of data centers becomes disabled, wherein enabling dynamic routing of the message comprises:
• program instructions to determine a target location, by:
• program instructions to compare change flag counts associated with the queue alias and the received message,
• program instructions to identify that the change flag counts associated with the queue alias and the received message are not equal,
• program instructions to, responsive to identifying that the change flag counts associated with the queue alias and the received message are not equal, update target cache information of the application and the message,
• program instructions to, responsive to identifying that the change flag count of the received message matches a current change flag count of the queue alias, determine the target location is a target location associated with the received target name, and
• program instructions to, responsive to determining that the first data center is available, altering the queue alias to resume message delivery to the first data center.

A computer system comprising:

• one or more computer processors;
• one or more computer readable storage media;
• and
• program instructions stored on the one or more computer readable storage media for execution by at least one of the one or more computer processors, the program instructions comprising:
• program instructions to, responsive to receiving a message that includes respective target cache information including a target name and a change flag count from an application for a queue alias of a queue manager, enable dynamic routing of the message between a plurality of data centers, wherein a first data center of the plurality of data centers becomes disabled, wherein enabling dynamic routing of the message comprises:
• program instructions to determine a target location, by:
• program instructions to compare change flag counts associated with the queue alias and the received message,
• program instructions to identify that the change flag counts associated with the queue alias and the received message are not equal,
• program instructions to, responsive to identifying that the change flag counts associated with the queue alias and the received message are not equal, update target cache information of the application and the message,
• program instructions to, responsive to identifying that the change flag count of the received message matches a current change flag count of the queue alias, determine the target location is a target location associated with the received target name, and,
• program instructions to, responsive to determining that the first data center is available, altering the queue alias to resume message delivery to the first data center.