Re-add support for ComsumerType.Simple/JMS SimpleMessageListenerContainer
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Key: CAMEL-3938
URL: https://issues.apache.org/jira/browse/CAMEL-3938
Project: Camel
Issue Type: Improvement
Components: camel-jms
Affects Versions: 2.7.0
Reporter: Joshua Watkins
A while ago there was a discussion topic that the
SimpleMessageListenerContainer/ConsumerType.Simple was removed from
camel-jms as it was deprecated. However from looking at the latest Spring
docs (
http://static.springsource.org/spring/docs/3.1.0.M1/javadoc-api/org/springf
ramework/jms/listener/SimpleMessageListenerContainer.html ) it is alive
and kicking.
Is there another reason that this feature was removed?
The reason I am so keen on the SimpleMessageListenerContainer is that the
DefaultMessageListenerContainer does not allow you to constrain the number
of threads used in a useful way. If you give it a task executor with a
maximum 5 threads and want to listen on 10 routes, only 5 of those routes
would be consumed from. There is even a note about this fact in the docs (
http://static.springsource.org/spring/docs/3.1.0.M1/javadoc-api/org/springf
ramework/jms/listener/DefaultMessageListenerContainer.html#setTaskExecutor(
java.util.concurrent.Executor) ). This makes the
SimpleMessageListenerContainer invaluable for scaling out an application
using camel-jms.
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