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https://issues.apache.org/jira/browse/QPIDJMS-295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16182422#comment-16182422
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Robbie Gemmell commented on QPIDJMS-295:
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JMS_AMQP_ContentEncoding is an ActiveMQ-specific extension, using an
Application Property which the broker internally utilises when doing certain
things such as converting messages between different protocols when using some
of its 'transformers'. The broker itself will presumably be stripping that
Application Property (itself a spec violation) somewhere while doing that given
your configuration, giving the resulting behaviour, as the Qpid JMS client does
not specifically know about that property and does not map it to the
content-encoding field of the AMQP message Properties section (not Application
Properties, which is separate).
Finalising behaviour around content type and encoding is an outstanding area of
work, its a fairly complicated subject, but really sits entirely outwith JMS
functionality.
> AMQP property content-encoding cannot be retrieved via
> JMS_AMQP_ContentEncoding
> -------------------------------------------------------------------------------
>
> Key: QPIDJMS-295
> URL: https://issues.apache.org/jira/browse/QPIDJMS-295
> Project: Qpid JMS
> Issue Type: Bug
> Components: qpid-jms-client
> Affects Versions: 0.23.0
> Reporter: Leo Riguspi
>
> The AMQP property content-encoding can be set but not retrieved:
> 1. Create a message and set the vendor property JMS_AMQP_ContentEncoding=gzip
> using QPid JMS
> 2. Send the message to an ActiveMQ broker via AMQP 1.0 with
> transport.transformer=jms (native does not work!)
> 3. Retrieve the message with QPid JMS: the property JMS_AMQP_ContentEncoding
> does not exist anymore in the message and there seem to be no other way of
> retrieving the content-encoding.
> Note that when consuming the same message with a python client the property
> seems to be set and accessible via the message.content_encoding field.
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