[GitHub] michaelandrepearce edited a comment on issue #2548: ARTEMIS-2118 Enhanced Message Groups Support

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michaelandrepearce edited a comment on issue #2548: ARTEMIS-2118 Enhanced Message Groups Support
URL: https://github.com/apache/activemq-artemis/pull/2548#issuecomment-463091333
 
 
   @billpoole-mi No there wont be any special message.
   
   The intent here is for apps where you want evenly load balanced groups but where apps can handle a slight change in which groups they are handling, e.g. this is very usefull where a stateless app that simply needs to process and enrich data, and produces onwards. Any data relating to the group can be loaded lazily.
   
   RE: JMSXGroupLastForConsumer its not possible to retro-acitvely add a header, because consumers can be added at anypoint, and at that point the group may not have a message to dispatch onwards it would not be possible so it would not be possible to add.
   
   This said if you have the need, you can though listen for notification CONSUMER_ADDED on notifications address, and as such could then if you know that queue is using that feature, could know rebalance will occur.

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