org.apache.openjpa.lib.util.concurrent
Interfaces 
ConcurrentMap
Condition
Lock
NanoTimer
Queue
WaitQueue.QueuedSync
Classes 
AbstractConcurrentEventManager
ConcurrentHashMap
ConcurrentHashMap.Entry
ConcurrentHashSet
ConcurrentLinkedQueue
ConcurrentReferenceHashMap
ConcurrentReferenceHashSet
CopyOnWriteArrayList
CopyOnWriteArraySet
ReentrantLock
TimeUnit
Utils
WaitQueue
WaitQueue.WaitNode