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Are publish-subscribe systems (e.g. ActiveMQ, Google App Engine pub/sub, and pypubsub) mainly for message communication between applications running over multiple machines with different memory spaces? Or can they be used for handling efficiently message communication between components of a single application running within a single machine?

Oliver
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morfys
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    Unclear what you are asking – Zig Mandel Apr 05 '15 at 15:26
  • Thanks for the feedback. I tried to clarify. – morfys Apr 05 '15 at 17:48
  • have you seen here? https://cloud.google.com/pubsub/docs At least for that one, it doesnt seem like its oriented to running it within a single machine. if you are worried about memory or overheads, im pretty sure it will have them. – Zig Mandel Apr 05 '15 at 17:58
  • Thanks for the tip. pypubsub seems well-suited for use within a single application, but I just wanted to check if people have had experience with it here. – morfys Apr 10 '15 at 16:10

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PyPubSub was designed to provide message communication between components of a single application. This does not imply running within a single machine, although a single machine would be the typical scenario. If a "network distributed" application (one that consists of severa collaborating components spread across multiple machines) takes care of marshalling data between the machines, pypubsub could still be used to great effect.

Oliver
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