remove akka-zeromq module #15864
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This was referenced Sep 11, 2014
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-zer akka#15864 remove zeromq module
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Initially, I just wanted to implement integration test for BAHIR-66. Google pointed me to JeroMQ, which provides official ZeroMQ binding for Java and does not require native libraries. I have decided to give it a try, but quickly realized that akka-zeromq module (transient dependency from current Bahir master) is not compatible with JeroMQ. Actually Akka team also wanted to move to JeroMQ (akka/akka#13856), but in the end decided to remove akka-zeromq project completely (akka/akka#15864, https://www.lightbend.com/blog/akka-roadmap-update-2014). Having in mind that akka-zeromq does not support latest version of ZeroMQ protocol and further development may come delayed, I have decided to refactor streaming-zeromq implementation and leverage JeroMQ. With the change we receive various benefits, such as support for PUB-SUB and PUSH-PULL messaging patterns and the ability to bind the socket on whatever end of communication channel (see test cases), subscription to multiple channels, etc. JeroMQ seems pretty reliable and reconnection is handled out-of-the-box. Actually, we could even start the ZeroMQ subscriber trying to connect to remote socket before other end created and bound the socket. While I tried to preserve backward compatibility of method signatures, there was no easy way to support Akka API and business logic that users could put there (e.g. akka.actor.ActorSystem). Closes #71
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As discussed in this roadmap update the ømq integration module is removed, it shall live on outside of the main Akka repository if there is enough public interest.
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