Synchronized access to XPathExpression resulting in contention for multiple
consumers
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Key: CAMEL-1930
URL: https://issues.apache.org/activemq/browse/CAMEL-1930
Project: Apache Camel
Issue Type: Bug
Components: camel-core
Affects Versions: 2.0-M3
Environment: Java 1.6, Spring 2.5.6
Reporter: Fabrice Delaporte
Hi,
I'm using Camel to do some JMS message routing. Messages are XML so xpath is a
natural choice.
However when using a choice with an xpath expression, the XPathBuilder creates
one XPathExpression object. According to the specification, these objects are
not thread safe so synchronizing looks natural. But then, using multiple jms
consumers is totally useless since no concurrent evaluations can be made.
XPathExpression objects would rather need to be stored in a ThreadLocal to
avoid synchronization and contention.
Cheers,
Fabrice
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