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From "Aaron Whiteside (JIRA)" <>
Subject [jira] [Created] (CAMEL-7994) SJMSComponent effectively ignores setConnectionCount()
Date Mon, 03 Nov 2014 21:32:34 GMT
Aaron Whiteside created CAMEL-7994:

             Summary: SJMSComponent effectively ignores setConnectionCount()
                 Key: CAMEL-7994
             Project: Camel
          Issue Type: Bug
          Components: camel-sjms
    Affects Versions: 2.14.0
            Reporter: Aaron Whiteside

SJMSComponent effectively ignores setConnectionCount()

This is because the JmsProducer, by default, pre-populates sessions+producers on Producer.doStart(),
which is called by the CamelContext in a single thread and the way the ConnectionFactoryResource
is configured, it returns the most recently idle connection (So really it always returns the
first connection opened).

This patch attached makes the ConnectionFactoryResource effectively return connections in
a round-robbin. Unit test attached in included.

This is important because TCP has a certain overhead per socket which makes it impossible
to achieve much more than 6~ messages a second, regardless of the CPU and IO resources available
to a broker. To fully utilize a broker multiple connections must be opened.

This is also important if your ConnectionFactory represent a cluster (Like in the case of
HornetQ), where subsequent connections are balanced across nodes in the cluster.

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