Improvements to code involving synchronized maps #52
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…ajor version number
This also fixes potential non-determinism in resizeAll() because all access to the caches map must be synchronized, but the caches.size() call wasn't synchronized.
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These are some improvements to
org.apache.jackrabbit.jcr2spi.ItemImpland other classes which use synchronized maps.The
listenersmember ofItemImplshould be made private because subclasses should not be allowed to mutate this map or iterate over it. Iterating over the map requires proper synchronization or else non-deterministic behavior can occur.Also, the changes to throw
NullPointerExceptionif anItemLifeCycleListenerinstance isnullis not really a change, because it was implicitly assumed that the listeners would not benull(notifyCreated() invokes itemCreated() on each initial listener without checking fornull).I would classify these changes as efficiency and code improvements, with three exceptions that fix concurrency issues: