Mark Hillary created CAMEL-5396:
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Summary: Improve performance of DefaultJmsKeyFormatStrategy
Key: CAMEL-5396
URL: https://issues.apache.org/jira/browse/CAMEL-5396
Project: Camel
Issue Type: Improvement
Components: camel-jms
Affects Versions: 2.9.2
Reporter: Mark Hillary
The current default implementation uses String.replace/replaceAll to escape the
illegal characters in the header key. This is unfortunate because
replace/replaceAll are implemented in terms of regular expressions which makes
the escaping quite costly for something that is executed for every single
message. Also it's quite likely that the headers will be identical for every
single message that's published via JMS.
The attached patch makes two changes;
* Use Commons Lang StringUtil.replaceEach which using a StringBuilder
internally to do the replacement. This adds a dependency on Commons Lang.
* Cache the output of StringUtil.replaceEach in a ConcurrentHashMap. This could
be moved to a separate class if caching every key is a concern. Or this could
be changed to use an LRUCache
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