com.liferay.portal.kernel.concurrent
Interfaces 
RejectedExecutionHandler
ThreadPoolHandler
Classes 
AbortPolicy
BatchablePipe
CallerRunsPolicy
ClearThreadLocalThreadPoolHandler
CoalescedPipe
CompeteLatch
ConcurrentHashSet
ConcurrentLFUCache
DiscardOldestPolicy
DiscardPolicy
DiscardWithCancelPolicy
IncreasableEntry
LockRegistry
ReadWriteLockKey
ReadWriteLockRegistry
TaskQueue
ThreadPoolExecutor
ThreadPoolHandlerAdapter
ThrowableAwareRunnable