Review XmlConfiguration locking #5095
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gregw
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Use a pool of parsers rather than a shared static Signed-off-by: Greg Wilkins <gregw@webtide.com>
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* Some updates to the new Pool class: + fixed a race with pending reservations + use a pending counter + Reservation API to simplify Entry API + removed public methods on Entry API * Some updates to the new Pool class: + fixed a race with pending reservations + use a pending counter + Reservation API to simplify Entry API + removed public methods on Entry API * Updates from review * Updates from review Tests for cache size and acquire with creator * Method no longer required with Reservation * update from the feedback on the feedback of the feedback from the review. Moved enable to Entry, removed Reservation class and clarified usage in javadoc * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance fixed javadoc * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance fixed javadoc * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance fixed javadoc * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance updates from review
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* Issue #5095 XmlConfiguration Parser Pool Use a pool of parsers rather than a shared static Signed-off-by: Greg Wilkins <gregw@webtide.com> * Some updates to the new Pool class: + fixed a race with pending reservations + use a pending counter + Reservation API to simplify Entry API + removed public methods on Entry API * Some updates to the new Pool class: + fixed a race with pending reservations + use a pending counter + Reservation API to simplify Entry API + removed public methods on Entry API * Updates from review * Updates from review Tests for cache size and acquire with creator * Method no longer required with Reservation * update from the feedback on the feedback of the feedback from the review. Moved enable to Entry, removed Reservation class and clarified usage in javadoc * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance * removed fake test Signed-off-by: Greg Wilkins <gregw@webtide.com> * Issue #5095 XmlConfiguration locking Use pool instead of static shared instance updates from review
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Spawned by #5083.
Jetty version
9.4.x
Description
XmlConfigurationhas astaticinstance ofXmlParserand in the constructor locks on it and performs the parsing.This is fine from the locking point of view, but it grabs a JVM-wide lock so that
XmlConfigurations can only execute serially, which may not be desirable and may slow down startup.The JVM-wide
XmlParserinstance was created once for performance reasons due to costly initialization?Can we do better?
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