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org.eclipse.persistence.internal.helper

public Class DeferredLockManager

Class Inheritance

extends Object

java.lang.Object
org.eclipse.persistence.internal.helper.DeferredLockManager

Imports

INTERNAL:

Purpose: Be used for deadlock avoidance through allowing detection and resolution.

Responsibilities:

Keep track of all deferred locks of each thread.
Keep track of all active locks of each thread..
Maintain the depth of the each thread.

Field Summary

Modifier and Type	Field and Description
protected Vector<ConcurrencyManager>	activeLocks
protected Vector<ConcurrencyManager>	deferredLocks
protected boolean	isThreadComplete
public static boolean	SHOULD_USE_DEFERRED_LOCKS
protected int	threadDepth

Constructor Summary

Access	Constructor and Description
public	DeferredLockManager() DeferredLockManager constructor comment.

Method Summary

Modifier and Type	Method and Description
public void	addActiveLock(Object manager) add a concurrency manager as active locks to the DLM
public void	addDeferredLock(Object manager) add a concurrency manager as deferred locks to the DLM
public void	decrementDepth() decrement the depth of the thread
public Vector<ConcurrencyManager>	getActiveLocks() Return a set of the active locks from the DLM
public Vector<ConcurrencyManager>	getDeferredLocks() Return a set of the deferred locks
public int	getThreadDepth() Return the depth of the thread associated with the DLM, being used to release the lock
public boolean	hasDeferredLock() Return if there are any deferred locks.
public void	incrementDepth() increment the depth of the thread
public boolean	isThreadComplete() Return if the thread is complete
public void	releaseActiveLocksOnThread() Release the active lock on the DLM
public void	setActiveLocks(Vector<ConcurrencyManager> activeLocks) set a set of the active locks to the DLM
public void	setDeferredLocks(Vector<ConcurrencyManager> deferredLocks) set a set of the deferred locks to the DLM
public void	setIsThreadComplete(boolean isThreadComplete) set if the thread is complete in the given DLM

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

activeLocks	back to summary
protected Vector<ConcurrencyManager> activeLocks

deferredLocks	back to summary
protected Vector<ConcurrencyManager> deferredLocks

isThreadComplete	back to summary
protected boolean isThreadComplete

SHOULD_USE_DEFERRED_LOCKS	back to summary
public static boolean SHOULD_USE_DEFERRED_LOCKS

threadDepth	back to summary
protected int threadDepth

Constructor Detail

DeferredLockManager	back to summary
public DeferredLockManager() DeferredLockManager constructor comment.

Method Detail

addActiveLock	back to summary
public void addActiveLock(Object manager) add a concurrency manager as active locks to the DLM

addDeferredLock	back to summary
public void addDeferredLock(Object manager) add a concurrency manager as deferred locks to the DLM

decrementDepth	back to summary
public void decrementDepth() decrement the depth of the thread

getActiveLocks	back to summary
public Vector<ConcurrencyManager> getActiveLocks() Return a set of the active locks from the DLM

getDeferredLocks	back to summary
public Vector<ConcurrencyManager> getDeferredLocks() Return a set of the deferred locks

getThreadDepth	back to summary
public int getThreadDepth() Return the depth of the thread associated with the DLM, being used to release the lock

hasDeferredLock	back to summary
public boolean hasDeferredLock() Return if there are any deferred locks.

incrementDepth	back to summary
public void incrementDepth() increment the depth of the thread

isThreadComplete	back to summary
public boolean isThreadComplete() Return if the thread is complete

releaseActiveLocksOnThread	back to summary
public void releaseActiveLocksOnThread() Release the active lock on the DLM

setActiveLocks	back to summary
public void setActiveLocks(Vector<ConcurrencyManager> activeLocks) set a set of the active locks to the DLM

setDeferredLocks	back to summary
public void setDeferredLocks(Vector<ConcurrencyManager> deferredLocks) set a set of the deferred locks to the DLM

setIsThreadComplete	back to summary
public void setIsThreadComplete(boolean isThreadComplete) set if the thread is complete in the given DLM