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java.lang.Objectorg.apache.derby.impl.store.raw.xact.NoLocking
A locking policy that implements no locking.
LockingPolicy
Field Summary |
Fields inherited from interface org.apache.derby.iapi.store.raw.LockingPolicy |
MODE_CONTAINER, MODE_NONE, MODE_RECORD |
Constructor Summary | |
protected |
NoLocking()
|
Method Summary | |
int |
getMode()
Get the mode of this policy |
boolean |
lockContainer(Transaction t,
ContainerHandle container,
boolean waitForLock,
boolean forUpdate)
Called when a container is opened. |
void |
lockRecordForRead(Latch latch,
RecordHandle record,
boolean forUpdate)
Lock a record while holding a page latch. |
boolean |
lockRecordForRead(Transaction t,
ContainerHandle container,
RecordHandle record,
boolean waitForLock,
boolean forUpdate)
Called before a record is fetched. |
void |
lockRecordForWrite(Latch latch,
RecordHandle record)
Lock a record for write while holding a page latch. |
boolean |
lockRecordForWrite(Transaction t,
RecordHandle record,
boolean lockForInsert,
boolean waitForLock)
Called before a record is inserted, updated or deleted. |
void |
unlockContainer(Transaction t,
ContainerHandle container)
Called when a container is closed. |
void |
unlockRecordAfterRead(Transaction t,
ContainerHandle container,
RecordHandle record,
boolean forUpdate,
boolean row_qualified)
Called after a record has been fetched. |
boolean |
zeroDurationLockRecordForWrite(Transaction t,
RecordHandle record,
boolean lockForPreviousKey,
boolean waitForLock)
Request a write lock which will be released immediately upon grant. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
protected NoLocking()
Method Detail |
public boolean lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate) throws StandardException
LockingPolicy
lockContainer
in interface LockingPolicy
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?
StandardException
- Standard Cloudscape error policyContainerHandle
public void unlockContainer(Transaction t, ContainerHandle container)
LockingPolicy
unlockContainer
in interface LockingPolicy
ContainerHandle
,
ContainerHandle.close()
public boolean lockRecordForRead(Transaction t, ContainerHandle container, RecordHandle record, boolean waitForLock, boolean forUpdate) throws StandardException
LockingPolicy
lockRecordForRead
in interface LockingPolicy
t
- Transaction to associate lock with.container
- Open Container used to get record. Will be used
to row locks by the container they belong to.record
- Record to lock.waitForLock
- Should lock request wait until granted?forUpdate
- Should container be locked for update, or read?
StandardException
- Standard Cloudscape error policyPage
public void lockRecordForRead(Latch latch, RecordHandle record, boolean forUpdate) throws StandardException
LockingPolicy
lockRecordForRead
in interface LockingPolicy
latch
- Latch held.record
- Record to lock.forUpdate
- Should container be locked for update, or read?
StandardException
- Standard Cloudscape error policyPage
public boolean zeroDurationLockRecordForWrite(Transaction t, RecordHandle record, boolean lockForPreviousKey, boolean waitForLock) throws StandardException
LockingPolicy
zeroDurationLockRecordForWrite
in interface LockingPolicy
t
- Transaction to associate lock with.record
- Record to lock.waitForLock
- Should lock request wait until granted?
StandardException
- Standard Cloudscape error policyPage
public boolean lockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsert, boolean waitForLock) throws StandardException
LockingPolicy
lockRecordForWrite
in interface LockingPolicy
t
- Transaction to associate lock with.record
- Record to lock.lockForInsert
- Lock is for an insert.waitForLock
- Should lock request wait until granted?
StandardException
- Standard Cloudscape error policyPage
public void lockRecordForWrite(Latch latch, RecordHandle record) throws StandardException
LockingPolicy
lockRecordForWrite
in interface LockingPolicy
latch
- Page latch held.record
- Record to lock.
StandardException
- Standard Cloudscape error policyPage
public void unlockRecordAfterRead(Transaction t, ContainerHandle container, RecordHandle record, boolean forUpdate, boolean row_qualified) throws StandardException
LockingPolicy
unlockRecordAfterRead
in interface LockingPolicy
StandardException
- Standard Cloudscape error policyPage
public int getMode()
LockingPolicy
getMode
in interface LockingPolicy
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