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https://issues.apache.org/jira/browse/ARTEMIS-2118?focusedWorklogId=197967&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-197967
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ASF GitHub Bot logged work on ARTEMIS-2118:
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Author: ASF GitHub Bot
Created on: 13/Feb/19 07:36
Start Date: 13/Feb/19 07:36
Worklog Time Spent: 10m
Work Description: michaelandrepearce commented 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 Because an consumers can be added at anypoint,
when the group may not have a message to dispatch onwards it would not be
possible 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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Issue Time Tracking
-------------------
Worklog Id: (was: 197967)
Time Spent: 0.5h (was: 20m)
> Enhanced Message Groups Support
> --------------------------------
>
> Key: ARTEMIS-2118
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2118
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Reporter: Michael Andre Pearce
> Assignee: Michael Andre Pearce
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> This ticket is for supporting some Message Group Enhancements.
>
> Currently Artemis implements message groups in a simple way, equivalent to
> SimpleMessageGroupMap in activemq5.
> [http://activemq.apache.org/message-groups.html]
> "SimpleMessageGroupMap keeps track of every group but suffers from unbounded
> memory use."
>
> For use cases migrating from activemq5 its important artemis supports similar
> MessageGroupHashBucked feature.
> "MessageGroupHashBucked keeps track of every group and has bounded memory
> use."
> As such, this JIRA is to add support for being able to enable a semantic
> equivalent to MessageGroupHashBucket from activemq5, at the queue level.
>
> Also currently it is not possible for a specific queue disable grouping, this
> can be useful where a shared address by many queues, where some consumers
> care for ordering and others do not.
> Lastly add an ability to rebalance message groups when a consumer is added,
> this is useful where you want groups more evenly balanced when consumers come
> online, even after dispatching started.
>
>
>
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