public class UpdateLockingStrategy extends Object implements LockingStrategy
A locking strategy where the locks are obtained through update statements. <p/> This strategy is not valid for read style locks.
Constructor and Description |
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UpdateLockingStrategy(Lockable lockable,
LockMode lockMode)
Construct a locking strategy based on SQL UPDATE statements.
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Modifier and Type | Method and Description |
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protected String |
generateLockString() |
protected LockMode |
getLockMode() |
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.
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public UpdateLockingStrategy(Lockable lockable, LockMode lockMode)
Construct a locking strategy based on SQL UPDATE statements.
lockable
- The metadata for the entity to be locked.lockMode
- Indictates the type of lock to be acquired. Note that
read-locks are not valid for this strategy.public void lock(Serializable id, Object version, Object object, int timeout, SharedSessionContractImplementor session) throws StaleObjectStateException, JDBCException
LockingStrategy
Acquire an appropriate type of lock on the underlying data that will endure until the end of the current transaction.
lock
in interface LockingStrategy
id
- The id of the row to be lockedversion
- 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 indefinitelysession
- The session from which the lock request originatedStaleObjectStateException
- Indicates an inability to locate the database row as part of acquiring
the requested lock.JDBCException
protected String generateLockString()
protected LockMode getLockMode()
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