Package org.hibernate.dialect.lock

Class AbstractSelectLockingStrategy

java.lang.Object

org.hibernate.dialect.lock.AbstractSelectLockingStrategy

All Implemented Interfaces:

LockingStrategy

Direct Known Subclasses:

PessimisticReadSelectLockingStrategy, PessimisticWriteSelectLockingStrategy, SelectLockingStrategy

public abstract class AbstractSelectLockingStrategy
extends Object
implements LockingStrategy

Base LockingStrategy implementation to support implementations based on issuing SQL SELECT statements. For non-read locks, this is achieved via the dialect's native SELECT ... FOR UPDATE syntax.

Author:

Steve Ebersole

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractSelectLockingStrategy(Lockable lockable, LockMode lockMode)

Method Summary

Modifier and Type	Method	Description
protected HibernateException	convertException(Object entity, JDBCException ex)
protected String	determineSql(int timeout)
protected String	generateLockString(int lockTimeout)
protected Lockable	getLockable()
protected LockMode	getLockMode()
protected String	getNoWaitSql()
protected String	getSkipLockedSql()
void	lock(Object id, Object version, Object object, int timeout, EventSource 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 Details

AbstractSelectLockingStrategy

protected AbstractSelectLockingStrategy(Lockable lockable,
 LockMode lockMode)

Method Details

getLockable

protected Lockable getLockable()

getLockMode

protected LockMode getLockMode()

generateLockString

protected String generateLockString(int lockTimeout)

lock

public void lock(Object id,
 Object version,
 Object object,
 int timeout,
 EventSource 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)

timeout - timeout in milliseconds, 0 = no wait, -1 = wait indefinitely

session - The session from which the lock request originated

Throws:

StaleObjectStateException - Indicates an inability to locate the database row as part of acquiring the requested lock.

JDBCException

convertException

protected HibernateException convertException(Object entity,
 JDBCException ex)

determineSql

protected String determineSql(int timeout)

getNoWaitSql

protected String getNoWaitSql()

getSkipLockedSql

protected String getSkipLockedSql()