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org.eclipse.net4j.util.concurrent
Class RWOLockManager.LockState<OBJECT,CONTEXT>

java.lang.Object
  extended by org.eclipse.net4j.util.concurrent.RWOLockManager.LockState<OBJECT,CONTEXT>
Enclosing class:
RWOLockManager<OBJECT,CONTEXT>
public static class RWOLockManager.LockState<OBJECT,CONTEXT>
extends Object

Represents a combination of locks for one OBJECT. The different lock types are represented by the values of the enum IRWLockManager.LockType

The locking semantics established by this class are as follows:

  • a read lock prevents a write lock by another, but allows read locks by others and allows a write option by another, and is therefore non-exclusive
  • a write lock prevents read locks by others, a write lock by another, and a write option by another, and is therefore exclusive
  • a write option prevents write locks by others and a write option by another, but allows read locks by others, and is therefore exclusive
    • .

    Since:
    3.2

    Method Summary
     OBJECT getLockedObject()
               
     Set<CONTEXT> getReadLockOwners()
               
     CONTEXT getWriteLockOwner()
               
     CONTEXT getWriteOptionOwner()
               
     boolean hasLock(IRWLockManager.LockType type)
               
     boolean hasLock(IRWLockManager.LockType type, CONTEXT view, boolean byOthers)
               
     String toString()
               
     
    Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
     

    Method Detail

    getLockedObject

    public OBJECT getLockedObject()

    hasLock

    public boolean hasLock(IRWLockManager.LockType type,
                       CONTEXT view,
                       boolean byOthers)

    hasLock

    public boolean hasLock(IRWLockManager.LockType type)

    toString

    public String toString()
    Overrides:
    toString in class Object

    getReadLockOwners

    public Set<CONTEXT> getReadLockOwners()

    getWriteLockOwner

    public CONTEXT getWriteLockOwner()

    getWriteOptionOwner

    public CONTEXT getWriteOptionOwner()
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    Copyright (c) 2011, 2012 Eike Stepper (Berlin, Germany) and others.