org.apache.derby.impl.store.raw.xact
Class ContainerLocking2
java.lang.Object
org.apache.derby.impl.store.raw.xact.NoLocking
org.apache.derby.impl.store.raw.xact.ContainerLocking2
- All Implemented Interfaces:
- LockingPolicy
public class ContainerLocking2
- extends NoLocking
A locking policy that implements container level locking with
isolation degree 2.
- See Also:
LockingPolicy
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
lf
private final LockFactory lf
ContainerLocking2
protected ContainerLocking2()
ContainerLocking2
protected ContainerLocking2(LockFactory lf)
lockContainer
public boolean lockContainer(Transaction t,
ContainerHandle container,
boolean waitForLock,
boolean forUpdate)
throws StandardException
- Obtain a Container shared or exclusive lock until
the end of the nested transaction.
- Specified by:
lockContainer
in interface LockingPolicy
- Overrides:
lockContainer
in class NoLocking
- Parameters:
t
- Transaction to associate lock with.container
- Container to lock.waitForLock
- Should lock request wait until granted?forUpdate
- Should container be locked for update, or read?
- Returns:
- true if the lock was obtained, false if it wasn't.
False should only be returned if the waitForLock policy was set to
"false," and the lock was unavailable.
- Throws:
StandardException
- Standard Derby error policy- See Also:
ContainerHandle
unlockContainer
public void unlockContainer(Transaction t,
ContainerHandle container)
- Unlock read locks.
In Cursor stability release all read locks obtained. unlockContainer()
will be called when the container is closed.
- Specified by:
unlockContainer
in interface LockingPolicy
- Overrides:
unlockContainer
in class NoLocking
- Parameters:
t
- The transaction to associate the lock with.container
- Container to unlock.- See Also:
ContainerHandle
,
ContainerHandle.close()
getMode
public int getMode()
- Description copied from interface:
LockingPolicy
- Get the mode of this policy
- Specified by:
getMode
in interface LockingPolicy
- Overrides:
getMode
in class NoLocking
Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.