UpdateLockingStrategy (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.dialect.lock
Class UpdateLockingStrategy

java.lang.Object
  org.hibernate.dialect.lock.UpdateLockingStrategy

All Implemented Interfaces:: LockingStrategy

public class UpdateLockingStrategy
extends Object
implements LockingStrategy

A locking strategy where the locks are obtained through update statements.

This strategy is not valid for read style locks.

Since:: 3.2
Author:: Steve Ebersole

Constructor Summary

UpdateLockingStrategy(Lockable lockable, LockMode lockMode)
          Construct a locking strategy based on SQL UPDATE statements.

Method Summary

protected String generateLockString()


protected LockMode getLockMode()


void lock(Serializable id, Object version, Object object, SessionImplementor session)
          Acquire an appropriate type of lock on the underlying data that will endure until the end of the current transaction.

Methods inherited from class java.lang.Object

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

Constructor Detail

UpdateLockingStrategy

public UpdateLockingStrategy(Lockable lockable,
                             LockMode lockMode)

Construct a locking strategy based on SQL UPDATE statements.
Parameters:: lockable - The metadata for the entity to be locked.; lockMode - Indictates the type of lock to be acquired. Note that read-locks are not valid for this strategy.

Method Detail

lock

public void lock(Serializable id,
                 Object version,
                 Object object,
                 SessionImplementor session)
          throws StaleObjectStateException,
                 JDBCException

Description copied from interface: LockingStrategy

Acquire an appropriate type of lock on the underlying data that will endure until the end of the current transaction.

Specified by:: lock in interface LockingStrategy

Parameters:: id - The id of the row to be locked; version - The current version (or null if not versioned); object - The object logically being locked (currently not used); session - The session from which the lock request originated
Throws:: StaleObjectStateException - Indicates an optimisitic lock failure as part of acquiring the requested database lock.; JDBCException
See Also:: LockingStrategy.lock(java.io.Serializable, java.lang.Object, java.lang.Object, org.hibernate.engine.SessionImplementor)

generateLockString

protected String generateLockString()

getLockMode

protected LockMode getLockMode()