Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Complete
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Affects Version/s: 2.1 GA
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Fix Version/s: 2.2 M3 Sprint 4, 2.2 M3
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Component/s: Documentation
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Labels:None
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Environment:Mac OS X 10.7.3
Java 1.6.0_29
Spring AMQP 1.0.0.RELEASE
Spring Integration 2.1.0.RELEASE
Description
I was attempting to have a header enricher add a content type header to a message that was subsequently being handled by an outbound AMQP channel adapter and found that various combinations of contentType and content-type for the header name weren't working.
After digging through DefaultAmqpHeaderMapper and AmqpHeaders I realized that it needs an 'amqp_' prefix in order for the header mapper to automatically copy it. It would be good for this to be mentioned in the docs, or a better way of handling standard AMQP headers to be developed.
Here is a snippet illustrating the final config that worked:
<int:chain input-channel="input" output-channel="output">
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<int:object-to-json-transformer />
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<int:header-enricher>
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<int:header name="amqp_contentType" value="application/json" overwrite="true" />
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</int:header-enricher>
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</int:chain>
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Activity
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Another (perhaps additional) nice feature would be an "amqp:header-enricher" element that simply provides common AMQP header names as sub-elements (like we do for mail, jms, etc.) Thoughts?
Mark Fisher
added a comment - Another (perhaps additional) nice feature would be an "amqp:header-enricher" element that simply provides common AMQP header names as sub-elements (like we do for mail, jms, etc.) Thoughts? Adding a dedicated (short) chapter specifically for AMQP Headers. There I am listing all available, automatically mapped AMQP Headers.
Gunnar Hillert
added a comment - Adding a dedicated (short) chapter specifically for AMQP Headers. There I am listing all available, automatically mapped AMQP Headers. Gunnar Hillert
added a comment - Issued PR: https://github.com/SpringSource/spring-integration/pull/521 
One option to avoid these issues is to use a SpEL expression - it can get a little verbose with long package names, though...
<int:header name="#{T(org.springframework.integration.amqp.AmqpHeaders).CONTENT_TYPE}" value="application/json" overwrite="true" />I agree it should be documented though (perhaps as well as showing this technique).