JAX-WS: Performance Improvement to JAXB Unmarshalling
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Key: AXIS2-3519
URL: https://issues.apache.org/jira/browse/AXIS2-3519
Project: Axis 2.0 (Axis2)
Issue Type: Bug
Reporter: Rich Scheuerle
Assignee: Rich Scheuerle
History:
According to the Sun specification, JAXB Unmarshallers for a specific
JAXBContext are not thread safe, but they can be pooled and reused.
It is expensive to create a JAXB Unmarshaller. Also JAXB Unmarshaller objects
can have a big footprint.
Solution:
The JAXBUtils code is the one-stop provider of JAXB Unmarshallers for the
engine. This code will be improved to support a pooled list of Unmarshallers
for each JAXBContext. The pool will be pruned if it gets too big. The pool is
backed by a ConcurrentHashMap. (ConcurrentHashMap is a new class in Java 5,
and the JAXWS module requires Java 5).
Kudos to David Strite of IBM for suggesting this fix and providing me a patch
(via private email).
I just completed testing. I will be committing this change (one file) shortly.
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