public enum PessimisticLockScope extends java.lang.Enum<PessimisticLockScope>
javax.persistence.lock.scope
property for pessimistic locking. This property may be passed as
an argument to the methods of the EntityManager,
Query, and TypedQuery interfaces that
allow lock modes to be specified or used with the
NamedQuery annotation.| Enum Constant and Description |
|---|
EXTENDED
In addition to the behavior for
PessimisticLockScope.NORMAL, element collections
and relationships owned by the entity that are contained in
join tables will be locked if the
javax.persistence.lock.scope property is specified
with a value of PessimisticLockScope.EXTENDED. |
NORMAL
This value defines the default behavior for pessimistic locking.
|
| Modifier and Type | Method and Description |
|---|---|
static PessimisticLockScope |
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.
|
static PessimisticLockScope[] |
values()
Returns an array containing the constants of this enum type, in
the order they are declared.
|
public static final PessimisticLockScope NORMAL
The persistence provider must lock the database row(s) that correspond to the non-collection-valued persistent state of that instance. If a joined inheritance strategy is used, or if the entity is otherwise mapped to a secondary table, this entails locking the row(s) for the entity instance in the additional table(s). Entity relationships for which the locked entity contains the foreign key will also be locked, but not the state of the referenced entities (unless those entities are explicitly locked). Element collections and relationships for which the entity does not contain the foreign key (such as relationships that are mapped to join tables or unidirectional one-to-many relationships for which the target entity contains the foreign key) will not be locked by default.
public static final PessimisticLockScope EXTENDED
PessimisticLockScope.NORMAL, element collections
and relationships owned by the entity that are contained in
join tables will be locked if the
javax.persistence.lock.scope property is specified
with a value of PessimisticLockScope.EXTENDED.
The state of entities referenced by such relationships will not
be locked (unless those entities are explicitly locked).
Locking such a relationship or element collection generally locks only
the rows in the join table or collection table for that
relationship or collection. This means that phantoms will be
possible.public static PessimisticLockScope[] values()
for (PessimisticLockScope c : PessimisticLockScope.values()) System.out.println(c);
public static PessimisticLockScope valueOf(java.lang.String name)
name - the name of the enum constant to be returned.java.lang.IllegalArgumentException - if this enum type has no constant with the specified namejava.lang.NullPointerException - if the argument is null