程序包 org.hibernate.dialect.lock

类 PessimisticReadSelectLockingStrategy

java.lang.Object

org.hibernate.dialect.lock.AbstractSelectLockingStrategy

org.hibernate.dialect.lock.PessimisticReadSelectLockingStrategy

所有已实现的接口:

LockingStrategy

public class PessimisticReadSelectLockingStrategy
extends AbstractSelectLockingStrategy

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

For non-read locks, this is achieved through the Dialect's specific SELECT ... FOR UPDATE syntax. This strategy is valid for LockMode.PESSIMISTIC_READ This class is a clone of SelectLockingStrategy.

从以下版本开始:

3.5

作者:

Steve Ebersole, Scott Marlow

另请参阅:

Dialect.getForUpdateString(org.hibernate.LockMode), Dialect.appendLockHint(org.hibernate.LockMode, String)

构造器概要

构造器

构造器	说明
PessimisticReadSelectLockingStrategy(Lockable lockable, LockMode lockMode)	Construct a locking strategy based on SQL SELECT statements.

方法概要

修饰符和类型	方法	说明
protected String	generateLockString(int lockTimeout)
void	lock(Serializable id, Object version, Object object, int timeout, SharedSessionContractImplementor session)	Acquire an appropriate type of lock on the underlying data that will endure until the end of the current transaction.

从类继承的方法 org.hibernate.dialect.lock.AbstractSelectLockingStrategy

determineSql, getLockable, getLockMode, getNoWaitSql, getSkipLockedSql

从类继承的方法 java.lang.Object

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

构造器详细资料

PessimisticReadSelectLockingStrategy

public PessimisticReadSelectLockingStrategy(Lockable lockable,
                                            LockMode lockMode)

Construct a locking strategy based on SQL SELECT statements.

参数:

lockable - The metadata for the entity to be locked.

lockMode - Indicates the type of lock to be acquired.

方法详细资料

lock

public void lock(Serializable id,
                 Object version,
                 Object object,
                 int timeout,
                 SharedSessionContractImplementor session)

从接口复制的说明: LockingStrategy

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

参数:

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(int lockTimeout)

指定者:

generateLockString 在类中 AbstractSelectLockingStrategy