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Posted to dev@qpid.apache.org by "Rob Godfrey (JIRA)" <ji...@apache.org> on 2015/12/14 11:16:46 UTC
[jira] [Commented] (QPID-6946) Implement Federation for Java Broker
[ https://issues.apache.org/jira/browse/QPID-6946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15055752#comment-15055752 ]
Rob Godfrey commented on QPID-6946:
-----------------------------------
Hi Karl - I'm actually looking at Federation/Global addressing in the Java Broker at the moment.
There are a number of different use cases / patterns for federation, including
1) Remote producer/consumer on point-to-point messaging (i.e. a queue has one single physical location, but federation allows clients attached to remote brokers to send/receive from that queue).
2) Remote producer/consumer on pub/sub messaging (similar to the point to point case above - a single broker is the "home" of the topic, but clients attached to a different broker may publish to or consume from the topic. Here there optimisations in broker -> broker traffic so that we don't duplicate message distribution). Distribution from the "home" broker to other brokers is essentially hierarchical.
3) Global "Shared" Queue: a queue which doesn't have a single physical location, its state is distributed amongst all participating brokers. Messages will not move off the local broker unless there is no (or insufficient) local demand for the messages. (Note in such a queue there is no way to "browse" the global queue).
4) Global "Distributed" topic ... like 2) only with no notion of a single home for the topic... distribution is not hierarchical but rather a mesh of some kind.
Which patterns/use cases are you most interested in?
> Implement Federation for Java Broker
> ------------------------------------
>
> Key: QPID-6946
> URL: https://issues.apache.org/jira/browse/QPID-6946
> Project: Qpid
> Issue Type: New Feature
> Components: Java Broker
> Reporter: Karl Andersson
>
> C++ Version has Federation support but as far as I know, the Java Broker doesn't. There is a Design Proposal from 2008: https://cwiki.apache.org/confluence/display/qpid/Java+Federation+Design+Proposal
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