org.apache.derby.impl.store.raw.xact
Class ContainerLocking3

java.lang.Object
  extended by org.apache.derby.impl.store.raw.xact.NoLocking
      extended by org.apache.derby.impl.store.raw.xact.ContainerLocking3
All Implemented Interfaces:
LockingPolicy
Direct Known Subclasses:
RowLocking3Escalate

public class ContainerLocking3
extends NoLocking

A locking policy that implements container level locking with isolation degree 3.

See Also:
LockingPolicy

Field Summary
protected  LockFactory lf
           
 
Fields inherited from interface org.apache.derby.iapi.store.raw.LockingPolicy
MODE_CONTAINER, MODE_NONE, MODE_RECORD
 
Constructor Summary
protected ContainerLocking3(LockFactory lf)
           
 
Method Summary
 int getMode()
          Get the mode of this policy
 boolean lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate)
          Obtain a Container shared or exclusive lock until the end of the nested transaction.
 
Methods inherited from class org.apache.derby.impl.store.raw.xact.NoLocking
lockRecordForRead, lockRecordForWrite, unlockContainer, unlockRecordAfterRead, zeroDurationLockRecordForWrite
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

lf

protected final LockFactory lf
Constructor Detail

ContainerLocking3

protected ContainerLocking3(LockFactory lf)
Method Detail

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

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

Built on Thu 2011-03-10 11:54:14+0000, from revision ???

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