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oracle.toplink.descriptors
Class PessimisticLockingPolicy
java.lang.Object
oracle.toplink.descriptors.PessimisticLockingPolicy
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable
-
public class PessimisticLockingPolicy
- extends java.lang.Object
- implements java.lang.Cloneable, java.io.Serializable
Description: This policy is used to configure bean level pessimistic locking feautre. It is set on the CMPPolicy instance of the ClassDescriptor Note that bean is not pessimistic locked in the following scenarios:
- No presence of a JTA transaction
- The current transaction is created and started by the Container for the invoking entity bean's method only. (i.e. invoke a business method without a client transaction)
- The bean has already been pessimistic locked in the current transaction
- Execution of ejbSelect
- Traversing relationship does not lock the returned result.
Responsibilities:
- Configure locking modes of WAIT or NO_WAIT
- Provide utitity to configure an ObjectLevelReadQuery with pessimstic locking based on this policy.
- Since:
- TopLink 10.1.3
- See Also:
CMPPolicy
, Serialized Form
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
PessimisticLockingPolicy
public PessimisticLockingPolicy()
getLockingMode
public short getLockingMode()
- Return locking mode. Default locking mode is ObjectLevelReadQuery.LOCK.
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- Returns:
- short locking mode value of ObjectLevelReadQuery.LOCK or ObjectLevelReadQuery.LOCK_NOWAIT
setLockingMode
public void setLockingMode(short mode)
- Set locking mode. If the mode is not a valid value, the locking mode is unchanged.
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- Parameters:
short
- mode must be value of ObjectLevelReadQuery.LOCK or ObjectLevelReadQuery.LOCK_NOWAIT
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