prologic-msgbus/README.md

msgbus

A distirbuted, scalable Message Bus server and library written in Go

WIP: THis is still highly experimental and not fit for production use.

Update: (2017-08-07) This is now being used by autodock and is undergoing heavy development to deliver what is laid out here.

Install

$ go install github.com/prologic/msgbus/...

Usage

Run the message bus daemon/server:

$ msgbusd
2017/08/07 01:11:16 [msgbus] Subscribe id=[::1]:55341 topic=foo
2017/08/07 01:11:22 [msgbus] PUT id=0 topic=foo payload=hi
2017/08/07 01:11:22 [msgbus] NotifyAll id=0 topic=foo payload=hi
2017/08/07 01:11:26 [msgbus] PUT id=1 topic=foo payload=bye
2017/08/07 01:11:26 [msgbus] NotifyAll id=1 topic=foo payload=bye
2017/08/07 01:11:33 [msgbus] GET topic=foo
2017/08/07 01:11:33 [msgbus] GET topic=foo
2017/08/07 01:11:33 [msgbus] GET topic=foo

Subscribe to a topic using the message bus client:

$ msgbus sub foo
2017/08/07 01:11:22 [msgbus] received message: id=0 topic=foo payload=hi
2017/08/07 01:11:26 [msgbus] received message: id=1 topic=foo payload=bye

Send a few messages with the message bus client:

$ msgbus pub foo hi
$ msgbus pub foo bye

You can also manually pull messages using the client:

$ msgbus pull foo
2017/08/07 01:11:33 [msgbus] received message: id=0 topic=foo payload=hi
2017/08/07 01:11:33 [msgbus] received message: id=1 topic=foo payload=bye

This is slightly different from a listening subscriber (using websockets) where messages are pulled directly.

Design

Design decisions so far:

• In memory queues (may extend this with interfaces and persistence)
• HTTP API
• Websockets for realtime push of events
• Sequence ID Message tracking
• Pull and Push model

License

msgbus is licensed under the MIT License