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From "Paolo Casagranda (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-2911) Option to make all consumers retroactive
Date Thu, 07 Apr 2011 16:07:05 GMT

    [ https://issues.apache.org/jira/browse/AMQ-2911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017018#comment-13017018
] 

Paolo Casagranda commented on AMQ-2911:
---------------------------------------

Very useful patch! The "always retroactive" flag could be an important basic feature in some
scenarios.
I hope it will be included in next (5.6?) release.


> Option to make all consumers retroactive
> ----------------------------------------
>
>                 Key: AMQ-2911
>                 URL: https://issues.apache.org/jira/browse/AMQ-2911
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Broker
>            Reporter: Pete Redhead
>            Priority: Minor
>         Attachments: amq-alwaysretroactive.patch
>
>
> Our organisation uses ActiveMQ as part of our RadioVIS implementation. One feature we
found that we found was missing was the ability to treat all consumers as if they were setting
consumer.retroactive=true. i.e. when they connect to a topic, they are instantly sent the
topic's last message. 
> (We found it necessary to implement server side, as the clients come from a variety of
third-party providers, which do not implement the retroactive header).
> Included is a patch that allows this to be configured on a per-topic basis from the configuration
file, for example:
> {code:xml}
> <policyEntry topic=">" producerFlowControl="true" alwaysRetroactive="true" memoryLimit="1mb">
>   <subscriptionRecoveryPolicy>
>      <lastImageSubscriptionRecoveryPolicy />
>   </subscriptionRecoveryPolicy>
> </policyEntry>
> {code}

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