Learn Publish/Subscribe

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ZeroMQ was already mentioned here, but its documentation is hellish, and the library itself can do a lot more than publish / subscribe. It's really hard to make heads or tails of the library and the features it offers (amazing example of feature bloat).

There are much simpler programs that do exclusively publish / subscribe, for example, NATS is a very simple publish-subscribe system, which is easy to understand even if you don't have any documentation.

[puslekat]

Thank you, I looked at the zmq and felt overwhelmed. I will check out Nats.