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https://issues.apache.org/jira/browse/QPID-7607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15801501#comment-15801501
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Rob Godfrey commented on QPID-7607:
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I don't think we need to worry about a receiving client not understanding the
annotation... by definition a client should ignore an x-opt- annotation if they
do not understand it. I think it's more that if it is computationally
expensive (and I doubt it is, because we are already doing a deep traversal of
the objects in the map) we could choose not to add the annotation if we do not
believe the client would act upon it. I would suggest we simply always add the
annotation if the message conforms with the JMS requirements.
> AMQP 1.0 conversion layer to use 'Map' x-opt-jms-msg-type annotation when
> message is representable as a JMS Map Message and recipent known to be the
> Qpid JMS Client
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-7607
> URL: https://issues.apache.org/jira/browse/QPID-7607
> Project: Qpid
> Issue Type: Improvement
> Components: Java Broker
> Reporter: Keith Wall
> Priority: Minor
> Fix For: qpid-java-7.0
>
>
> If the AMQP 1.0 converts a message for the Qpid JMS Client and the body is a
> Map whose content conforms to the JMSMapMessage restrictions (string keys,
> restricted domain of values etc), the conversion layer should set the
> “x-opt-jms-msg-type” annotation with a Map value so that the client, on
> receipt, will produce a JMS Map Message for the application.
> For map messages converted from other protocols to AMQP 1.0, this will ensure
> fidelity (currently the user receives an ObjectMessage - see test
> {{org.apache.qpid.jms.provider.amqp.message.AmqpCodecTest#testCreateAmqpObjectMessageFromAmqpValueWithMap}}).
> For management responses, this will ensure that many management responses can
> be handled simply.
> If the map does not conform to the JMS restrictions or the client is not a
> Qpid JMS Client, the annotation must not be applied.
> Q: how should the broker know the client understands the
> “x-opt-jms-msg-type” annotation?
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