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java.lang.Objectorg.eclipse.persistence.descriptors.FieldsLockingPolicy
org.eclipse.persistence.descriptors.SelectedFieldsLockingPolicy
public class SelectedFieldsLockingPolicy
Purpose: An implementation of the OptimisticLockingPolicy interface. This policy compares selected fields in the WHERE clause when doing an update or a delete. If any field has been changed, an optimistic locking exception will be thrown. Note that the fields specified must be mapped and not be primary keys.
NOTE: This policy can only be used inside a unit of work.
Nested Class Summary |
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Nested classes/interfaces inherited from interface org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy |
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org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy.LockOnChange |
Constructor Summary | |
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SelectedFieldsLockingPolicy()
PUBLIC: Create a new selected fields locking policy. |
Method Summary | |
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void |
addLockFieldName(String fieldName)
PUBLIC: Add a fieldname to lock on. |
void |
addLockValuesToTranslationRow(ObjectLevelModifyQuery query)
INTERNAL: Values to be included in the locking mechanism are added to the translation row. |
Vector |
getLockFields()
INTERNAL: Returns the lock fields |
void |
initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)
INTERNAL: It is responsible for initializing the policy; |
void |
setLockFieldNames(Vector lockFieldNames)
PUBLIC: Set the field names to lock on. |
void |
setLockFields(Map lockFieldsByTable)
INTERNAL: Used to set the field names to be used in this policy. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SelectedFieldsLockingPolicy()
Method Detail |
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public void addLockFieldName(String fieldName)
public void addLockValuesToTranslationRow(ObjectLevelModifyQuery query) throws DatabaseException
addLockValuesToTranslationRow
in interface org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy
addLockValuesToTranslationRow
in class FieldsLockingPolicy
DatabaseException
public Vector getLockFields()
public void initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)
initialize
in interface org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy
initialize
in class FieldsLockingPolicy
public void setLockFieldNames(Vector lockFieldNames)
public void setLockFields(Map lockFieldsByTable)
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