AbstractSelectLockingStrategy (Hibernate Javadocs)

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.

Constructor Summary

Constructors
Modifier Constructor Description

protected AbstractSelectLockingStrategy(Lockable lockable, LockMode lockMode)

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail

AbstractSelectLockingStrategy

protected AbstractSelectLockingStrategy(Lockable lockable,
                                        LockMode lockMode)

Method Detail

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()
```