com.ideo.sweetdev.core.util
Class LockManager

java.lang.Object
  com.ideo.sweetdev.core.util.LockManager

public class LockManager

extends java.lang.Object

Utility class that manager multi-Thread access on readable/writtable resource.

Field Summary

static long	MAXWAITING_LCKACCES max time waiting for lock access
static long	MAXWAITING_READING max time waiting for reading
static long	MAXWAITING_UPDATING max time waiting for updating

Constructor Summary

LockManager()
Creates a new LockManager object.

LockManager(long _waitingForReading, long _waitingForUpdating)
Creates a new LockManager object.

Method Summary

void	getReadAccessLock() Try to get a reading access right.
long	getWaitingForReadingTime() get time wainting for reading
long	getWaitingForUpdatingTime() get time waiting for updating
void	notifyAllWaitingThreads() Wake up every threads waiting for any access.
void	notifyReaders() Wake up every threads waiting for reading access.
void	notifyUpdaters() Wake up every threads waiting for updating access.
void	releaseReadAccessLock() Release reading access right.
void	releaseWriteAccessLock() release the write access lock
void	releaseWriteAccessLock(int _lockCounter) Release writting access right.
void	releaseWriteAccessLockAll() release all the write access locks
void	setWriteAccessLock() Set a writting access right.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAXWAITING_READING

public static final long MAXWAITING_READING

max time waiting for reading

See Also:

Constant Field Values

MAXWAITING_UPDATING

public static final long MAXWAITING_UPDATING

max time waiting for updating

See Also:

Constant Field Values

MAXWAITING_LCKACCES

public static final long MAXWAITING_LCKACCES

max time waiting for lock access

See Also:

Constant Field Values

Constructor Detail

LockManager

public LockManager()

Creates a new LockManager object.

LockManager

public LockManager(long _waitingForReading,
                   long _waitingForUpdating)

Creates a new LockManager object.

Parameters:

_waitingForReading - time wainting for reading

_waitingForUpdating - time wainting for updating

Method Detail

getWaitingForReadingTime

public long getWaitingForReadingTime()

get time wainting for reading

Returns:

time wainting for reading

getWaitingForUpdatingTime

public long getWaitingForUpdatingTime()

get time waiting for updating

Returns:

time wainting for updating

getReadAccessLock

public void getReadAccessLock()
                       throws TechnicalException

Try to get a reading access right. The lock could be done only when no writting access exists.

Throws:

TechnicalException - te

setWriteAccessLock

public void setWriteAccessLock()
                        throws TechnicalException

Set a writting access right. The lock could be done only when every reading access is over.

Throws:

TechnicalException - te

releaseWriteAccessLock

public void releaseWriteAccessLock(int _lockCounter)

Release writting access right.

Parameters:

_lockCounter - int

releaseWriteAccessLock

public void releaseWriteAccessLock()

release the write access lock

releaseWriteAccessLockAll

public void releaseWriteAccessLockAll()

release all the write access locks

releaseReadAccessLock

public void releaseReadAccessLock()

Release reading access right.

notifyReaders

public void notifyReaders()

Wake up every threads waiting for reading access.

notifyUpdaters

public void notifyUpdaters()

Wake up every threads waiting for updating access.

notifyAllWaitingThreads

public void notifyAllWaitingThreads()

Wake up every threads waiting for any access.