Publish and subscribe broker with multiple orthogonal topic trees

A method for brokering a publish subscribe process, the method comprising:

• receiving, by a hardware receiver, a message and two or more orthogonal message topics, wherein a topic is a branch of a topic tree;
• identifying, by one or more processors, all subscribers whose subscription topics match the received two or more orthogonal message topics;
• and
• sending, by a hardware transmitter, the message to only identified subscribers and not to subscribers having just one of the orthogonal message topics.

A computer program product for brokering a publish subscribe process, the computer program product comprising a computer readable storage medium having program code embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, and wherein the program code is readable and executable by a processor to perform a method comprising:

• receiving, by a hardware receiver, a message and two or more orthogonal message topics, wherein a topic is a branch of a topic tree;
• identifying all subscribers whose subscription topics match the received two or more orthogonal message topics;
• and
• sending, by a hardware transmitter, the message to only the identified subscribers and not to subscribers having just one of the orthogonal message topics.