[
https://issues.apache.org/jira/browse/WSCOMMONS-280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rich Scheuerle updated WSCOMMONS-280:
-------------------------------------
Summary: Performance: Control string interning of
OMStAXWrapper.getNamespaceURI()...Default should be no (was: Performacne:
Control string interning of OMStAXWrapper.getNamespaceURI()...Default should be
no)
> Performance: Control string interning of
> OMStAXWrapper.getNamespaceURI()...Default should be no
> -----------------------------------------------------------------------------------------------
>
> Key: WSCOMMONS-280
> URL: https://issues.apache.org/jira/browse/WSCOMMONS-280
> Project: WS-Commons
> Issue Type: Bug
> Components: AXIOM
> Reporter: Rich Scheuerle
> Assignee: Rich Scheuerle
>
> Problem:
> A recent change was made to OMStAXWrapper.getNamespaceURI() to always intern
> the returned namespace uri string. This cause an unnecessary lock on the
> String pool, which degrades
> performance. This change was added due to address the following issue:
> http://thread.gmane.org/gmane.text.xml.security.devel/5825. The solution
> below provides a way for the user to request
> interning.
> More Information:
> Most XMLStreamReader parsers have a flag to toggle String interning. For
> performance reasons, many of these parsers default to no interning.
> Thus the OMStAXWrapper should also default to no interning.
> The OMStAXWrapper is a wrapper around a parser or OM tree.
> If the underlying parser has already interned the namespace, there is no
> reason to repeat the interning.
> The problem is that there is no standard parser property to detect string
> interning. (Woodstox has a property on the XMLInputFactory. IBM's parser
> has a property on the XMLStreamReader).
> Solution:
> I added isNamespaceURIInterning and setNamespaceURIInterning methods to
> OMStAXWrapper. This gives the user the control. The default is reverted
> back to no interning.
> Future:
> This is a tactical solution.
> We might need to revisit this code if StAX provides public properties to
> control the interning of namespace uris and strings.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
