Package org.flowable.common.engine.impl.lock

Class LockManagerImpl

java.lang.Object

org.flowable.common.engine.impl.lock.LockManagerImpl

All Implemented Interfaces:

LockManager

public class LockManagerImpl
extends Object
implements LockManager

Author:

Filip Hrisafov

Field Summary

Fields

Modifier and Type	Field	Description
protected CommandExecutor	commandExecutor
protected String	engineType
protected boolean	hasAcquiredLock
protected static final int	LOCK_NAME_MAX_LENGTH
protected CommandConfig	lockCommandConfig
protected Duration	lockForceAcquireAfter
protected String	lockName
protected Duration	lockPollRate
protected static final org.slf4j.Logger	LOGGER

Constructor Summary

Constructors

Constructor	Description
LockManagerImpl(CommandExecutor commandExecutor, String lockName, Duration lockPollRate, String engineType)
LockManagerImpl(CommandExecutor commandExecutor, String lockName, Duration lockPollRate, Duration forceAcquireAfter, String engineType)

Method Summary

Modifier and Type	Method	Description
boolean	acquireLock()	Acquire the lock.
boolean	acquireLock(Duration lockForceAcquireAfter)	Acquire the lock.
protected <T> T	executeCommand(Command<T> command)
protected Duration	getLockPollRate()
void	releaseAndDeleteLock()	Release the lock and delete the resources for the lock if needed.
void	releaseLock()	Release the lock.
void	waitForLock(Duration waitTime)	Wait for the given waitTime to acquire the lock
<T> T	waitForLockRunAndRelease(Duration waitTime, Supplier<T> supplier)	Wait to acquire a lock, once a lock is acquired execute the supplier and release finally the lock.

Methods inherited from class java.lang.Object

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

Field Details

LOGGER

protected static final org.slf4j.Logger LOGGER

LOCK_NAME_MAX_LENGTH

protected static final int LOCK_NAME_MAX_LENGTH

See Also:

• Constant Field Values

commandExecutor

protected CommandExecutor commandExecutor

lockName

protected String lockName

lockPollRate

protected Duration lockPollRate

engineType

protected String engineType

lockCommandConfig

protected CommandConfig lockCommandConfig

hasAcquiredLock

protected boolean hasAcquiredLock

lockForceAcquireAfter

protected Duration lockForceAcquireAfter

Constructor Details

LockManagerImpl

public LockManagerImpl(CommandExecutor commandExecutor,
 String lockName,
 Duration lockPollRate,
 String engineType)

LockManagerImpl

public LockManagerImpl(CommandExecutor commandExecutor,
 String lockName,
 Duration lockPollRate,
 Duration forceAcquireAfter,
 String engineType)

Method Details

waitForLock

public void waitForLock(Duration waitTime)

Description copied from interface: LockManager

Wait for the given waitTime to acquire the lock

Specified by:

waitForLock in interface LockManager

Parameters:

waitTime - the duration to wait before throwing an exception

acquireLock

public boolean acquireLock()

Description copied from interface: LockManager

Acquire the lock.

Specified by:

acquireLock in interface LockManager

Returns:

true if the lock was acquired, false otherwise

acquireLock

public boolean acquireLock(Duration lockForceAcquireAfter)

Description copied from interface: LockManager

Acquire the lock. The lockForceAcquireAfter will be used to acquire an expired lock

Specified by:

acquireLock in interface LockManager

Parameters:

lockForceAcquireAfter - the amount of time after which the lock should be acquired

Returns:

true if the lock was acquired, false otherwise

releaseLock

public void releaseLock()

Description copied from interface: LockManager

Release the lock.

Specified by:

releaseLock in interface LockManager

releaseAndDeleteLock

public void releaseAndDeleteLock()

Description copied from interface: LockManager

Release the lock and delete the resources for the lock if needed.

Specified by:

releaseAndDeleteLock in interface LockManager

waitForLockRunAndRelease

public <T> T waitForLockRunAndRelease(Duration waitTime,
 Supplier<T> supplier)

Description copied from interface: LockManager

Wait to acquire a lock, once a lock is acquired execute the supplier and release finally the lock.

Specified by:

waitForLockRunAndRelease in interface LockManager

Parameters:

waitTime - the duration to wait before throwing an exception

supplier - the supplier to be executed once the lock is acquired

Returns:

the result from the supplier

executeCommand

protected <T> T executeCommand(Command<T> command)

getLockPollRate

protected Duration getLockPollRate()