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https://issues.apache.org/activemq/browse/CAMEL-2729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-2729:
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Fix Version/s: 2.4.0
> Enable transaction propagation for SEDA component
> -------------------------------------------------
>
> Key: CAMEL-2729
> URL: https://issues.apache.org/activemq/browse/CAMEL-2729
> Project: Apache Camel
> Issue Type: Improvement
> Affects Versions: 2.2.0
> Reporter: Sergio Bossa
> Fix For: 2.4.0
>
> Attachments: seda-camel.zip
>
>
> I was recently working on a pure SEDA prototype based on Camel and ActiveMQ,
> and the biggest problem I had was the lack of transaction propagation among
> stages/threads, due to the Spring transaction-per-thread model which Camel
> relies on.
> Hence, it is currently impossible to commit/rollback transactions from a
> different stage than the one that initiated it.
> So, I developed a patch to org.apache.camel.component.jms.JmsConfiguration
> class in order to use a custom
> org.springframework.jms.listener.AbstractMessageListenerContainer which
> enables external transaction management.
> Then, I developed a Camel bean component to bind and propagate transactional
> resources among threads, and manually commit/rollback transactions.
> I'm attaching a sample project containing and showcasing all this stuff: it
> reads from an ActiveMQ queue, does dummy processing, and puts on another
> queue.
> In order to run:
> $> mvn test
> In order to run with an injected fault and do rollback:
> $> mvn test -Pfault-test
> WARN: requires a local ActiveMQ broker at tcp://localhost:61616
> I'd like to gain some feedback and eventually talk about including such a
> features into Camel code base, which would require to:
> 1) Patch JmsConfiguration in order to allow injection of external
> AbstractMessageListenerContainer implementations.
> 2) Patch JmsConfiguration in order to avoid forcing to set the
> TransactionManager.
> 3) Somewhat enrich the Seda component to natively support transaction
> propagation.
> Feel free to ask any question, and thanks for listening!
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