org.hibernate.dialect.lock
Class PessimisticForceIncrementLockingStrategy

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

All Implemented Interfaces:

LockingStrategy

public class PessimisticForceIncrementLockingStrategy
extends Object
implements LockingStrategy

A pessimistic locking strategy that increments the version immediately (obtaining an exclusive write lock).

This strategy is valid for LockMode.PESSIMISTIC_FORCE_INCREMENT

Since:

3.5

Author:

Scott Marlow

Constructor Summary

PessimisticForceIncrementLockingStrategy(Lockable lockable, LockMode lockMode)
Construct locking strategy.

Method Summary

protected LockMode	getLockMode() Retrieve the specific lock mode defined.
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

PessimisticForceIncrementLockingStrategy

public PessimisticForceIncrementLockingStrategy(Lockable lockable,
                                                LockMode lockMode)

Construct locking strategy.

Parameters:

lockable - The metadata for the entity to be locked.

lockMode - Indicates the type of lock to be acquired.

Method Detail

lock

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

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

Throws:

StaleObjectStateException - Indicates an optimistic lock failure as part of acquiring the requested database lock.

JDBCException - Indicates errors from the JDBC driver.

getLockMode

protected LockMode getLockMode()

Retrieve the specific lock mode defined.

Returns:

The specific lock mode.