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. Therefore, when performance is important, this issue has to be considered. Lock Mode ( setLockMode ) ObjectDB uses ... adds support for pessimistic locking . The setLockMode method sets a lock mode that has to be applied ... a pessimistic WRITE lock on all the result objects:   List results = query. setLockMode

JPA Method in javax.persistence.Query Query setLockMode (    LockModeType  lockMode ) Set the lock mode type to be used for the query execution. Parameters: lockMode - lock mode Return: the same query instance Throws: IllegalStateException - if the query is found not to be a Java

JPA Method in javax.persistence.TypedQuery TypedQuery setLockMode (    LockModeType  lockMode ) Set the lock mode type to be used for the query execution. Parameters: lockMode - lock mode Return: the same query instance Throws: IllegalStateException - if the query is found not

for the  setLockMode and  setHint methods. Every  @NamedQuery annotation is attached

. setLockMode () or TypedQuery. setLockMode () method. Lock modes can be used to specify either optimistic or

is not valid for the implementation Since: JPA 1.0 Query setLockMode ( LockModeType  lockMode

for the implementation Since: JPA 2.0 TypedQuery setLockMode ( LockModeType  lockMode) Set the lock

- if the second argument is not valid for the implementation Since: JPA 2.1 Query setLockMode

.CheckCacheThenDatabase); /* q. setLockMode (LockModeType.OPTIMISTIC); */ try { java.lang.Object r = q.getSingleResult