| This class is capable of receiving notifications about the undeployment of
a webapp, and responds by ensuring that commons-logging releases all
memory associated with the undeployed webapp.
In general, the WeakHashtable support added in commons-logging release 1.1
ensures that logging classes do not hold references that prevent an
undeployed webapp's memory from being garbage-collected even when multiple
copies of commons-logging are deployed via multiple classloaders (a
situation that earlier versions had problems with). However there are
some rare cases where the WeakHashtable approach does not work; in these
situations specifying this class as a listener for the web application will
ensure that all references held by commons-logging are fully released.
To use this class, configure the webapp deployment descriptor to call
this class on webapp undeploy; the contextDestroyed method will tell
every accessable LogFactory class that the entry in its map for the
current webapp's context classloader should be cleared.
since:
1.1 | 