[jira] Updated: (CAMEL-136) resequencer should support an optional Expression/Comparator to determine if the two messages belong to the same set (in which case should they be reordered)

["James Strachan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/activemq/browse/CAMEL-136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

James Strachan updated CAMEL-136:
---------------------------------

    Assignee:     (was: James Strachan)

> resequencer should support an optional Expression/Comparator to determine if the two messages belong to the same set (in which case should they be reordered) 
> --------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CAMEL-136
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-136
>             Project: Apache Camel
>          Issue Type: Improvement
>            Reporter: James Strachan
>            Priority: Minor
>
> e.g. to support reordering according to the JMSXGroupID / JMSXGroupSeq headers we only reorder messages for the same value of JMSXGroupID if the sequence numbers are out of range.
> For ActiveMQ we generally only reorder messages for the same Destination and ProducerId but differing ProducerSequenceId.
> So in pseudocode its 
> {code}
> if (groupComparator.compare(firstMessage, secondMessage) == 0) {
>   if (messageComparator.compare(firstMessage, secondMessage) > 0) {
>     // lets swap the messages
>   }
> {code}

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