org.hibernate.dialect.lock
Class PessimisticReadUpdateLockingStrategy

java.lang.Object
  extended by org.hibernate.dialect.lock.PessimisticReadUpdateLockingStrategy
All Implemented Interfaces:
LockingStrategy

public class PessimisticReadUpdateLockingStrategy
extends Object
implements LockingStrategy

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

This strategy is valid for LockMode.PESSIMISTIC_READ This class is a clone of UpdateLockingStrategy.

Since:
3.5

Constructor Summary
PessimisticReadUpdateLockingStrategy(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, int timeout, 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

PessimisticReadUpdateLockingStrategy

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

Parameters:
lockable - The metadata for the entity to be locked.
lockMode - Indicates 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,
                 int timeout,
                 SessionImplementor session)
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)
timeout - timeout in milliseconds, 0 = no wait, -1 = wait indefinitely
session - The session from which the lock request originated

generateLockString

protected String generateLockString()

getLockMode

protected LockMode getLockMode()


Copyright © 2001-2015 Red Hat, Inc. All Rights Reserved.