Package de.aristaflow.adept2.util.locking

Class AcquireLockException

java.lang.Object

java.lang.Throwable

java.lang.Exception

de.aristaflow.adept2.util.LockException

de.aristaflow.adept2.util.locking.AcquireLockException

All Implemented Interfaces:

Serializable

public class AcquireLockException
extends LockException

An AcquireLockException indicates that a lock of a specific type on an object can not be acquired since the object is already locked by another locking object (and possibly with another type of lock). Since the current lock can be released some time in the future, a retry could help.
This exception is only thrown when a long-term lock blocks an acquisition; a blocking short-term lock is usually indicated by a thrown InterruptedException.

Author:

Ulrich Kreher

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
AcquireLockException(Object lockedObject, Object lockOwner, Object lockAcquiringObject, String lockType)	Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated lockType since the lockedObject is already locked (with the same lock type) by the designated lockOwner.
AcquireLockException(Object lockedObject, Object lockAcquiringObject, String lockType)	Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated lockType since the lockedObject is already locked (with the same lock type) but the current lock owner is unknown.
AcquireLockException(Object lockedObject, Object lockOwner, String currentLockType, Object lockAcquiringObject, String acquiringLockType)	Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated acquiringLockType since the lockedObject is already locked (with the currentLockType) by the designated lockOwner.
AcquireLockException(Object lockedObject, String currentLockType, Object lockAcquiringObject, String acquiringLockType)	Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated acquiringLockType since the lockedObject is already locked (with the currentLockType) but the current lock owner is unknown.

Method Summary

Modifier and Type	Method	Description
String	getAcquiringLockType()	Returns the type of the lock which was tried to being acquired.
Object	getAcquiringObject()	Returns the object that wants to acquire the lock.
String	getMessage()

Methods inherited from class de.aristaflow.adept2.util.LockException

getLockedObject, getLockOwner, getLockType

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Details

AcquireLockException

public AcquireLockException(Object lockedObject,
 Object lockAcquiringObject,
 String lockType)

Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated lockType since the lockedObject is already locked (with the same lock type) but the current lock owner is unknown.

Parameters:

lockedObject - The object that is currently locked and that should be locked again.

lockAcquiringObject - The object that wanted to acquire the lock which lead to the created exception.

lockType - The type of the lock which can not be acquired since it is currently held on the object.

AcquireLockException

public AcquireLockException(Object lockedObject,
 String currentLockType,
 Object lockAcquiringObject,
 String acquiringLockType)

Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated acquiringLockType since the lockedObject is already locked (with the currentLockType) but the current lock owner is unknown.

Parameters:

lockedObject - The object that is currently locked and that should be locked again.

currentLockType - The type of the lock which is currently held on the object.

lockAcquiringObject - The object that wanted to acquire the lock which lead to the created exception.

acquiringLockType - The type of the lock which can not be acquired.

AcquireLockException

public AcquireLockException(Object lockedObject,
 Object lockOwner,
 Object lockAcquiringObject,
 String lockType)

Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated lockType since the lockedObject is already locked (with the same lock type) by the designated lockOwner.

Parameters:

lockedObject - The object that is currently locked and that should be locked again.

lockOwner - The object that currently locks the object.

lockAcquiringObject - The object that wanted to acquire the lock which lead to the created exception.

lockType - The type of the lock which can not be acquired since it is currently held on the object.

AcquireLockException

public AcquireLockException(Object lockedObject,
 Object lockOwner,
 String currentLockType,
 Object lockAcquiringObject,
 String acquiringLockType)

Creates a new lock exception indicating that the designated lockAcquiringObject can not acquire the lock of the designated acquiringLockType since the lockedObject is already locked (with the currentLockType) by the designated lockOwner.

Parameters:

lockedObject - The object that is currently locked and that should be locked again.

lockOwner - The object that currently locks the object.

currentLockType - The type of the lock which is currently held on the object.

lockAcquiringObject - The object that wanted to acquire the lock which lead to the created exception.

acquiringLockType - The type of the lock which can not be acquired.

Method Details

getAcquiringObject

public Object getAcquiringObject()

Returns the object that wants to acquire the lock.

Returns:

The object that wants to acquire the lock.

getAcquiringLockType

public String getAcquiringLockType()

Returns the type of the lock which was tried to being acquired. This may differ from the lock type currently held.

Returns:

The type of the lock which was tried to being acquired.

getMessage

public String getMessage()

Overrides:

getMessage in class Throwable