locklib

Class NullLockPreChecker<LockType>

java.lang.Object

locklib.NullLockPreChecker<LockType>

Type Parameters:

LockType - the type of lock

All Implemented Interfaces:

LockManagerListener<LockType>, LockPreChecker<LockType>

public class NullLockPreChecker<LockType>
extends Object
implements LockPreChecker<LockType>

Lock pre-checker that accepts waiting for all locks, possibly generating a deadlock.

Constructor Summary

Constructors

Constructor and Description
NullLockPreChecker() Creates a new pre-checker.

Method Summary

Modifier and Type	Method and Description
void	locked(LockGrant<LockType> g) A lock has been granted.
void	pre_check_wait(LockRequest<LockType> r, Target<LockType> t) Checks if we can wait for a lock.
void	unlocked(LockGrant<LockType> g) A lock has been released.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullLockPreChecker

public NullLockPreChecker()

Creates a new pre-checker.

Method Detail

pre_check_wait

public void pre_check_wait(LockRequest<LockType> r,
                           Target<LockType> t)

Description copied from interface: LockPreChecker

Checks if we can wait for a lock. This method should throw an exception if waiting for the lock is not allowed.

Specified by:

pre_check_wait in interface LockPreChecker<LockType>

Parameters:

r - the lock request

t - the lock target

locked

public void locked(LockGrant<LockType> g)

Description copied from interface: LockManagerListener

A lock has been granted.

Specified by:

locked in interface LockManagerListener<LockType>

Parameters:

g - the granted lock

unlocked

public void unlocked(LockGrant<LockType> g)

Description copied from interface: LockManagerListener

A lock has been released.

Specified by:

unlocked in interface LockManagerListener<LockType>

Parameters:

g - the released lock