| java.lang.Object
 org.apache.derby.impl.store.raw.xact.NoLocking
org.apache.derby.impl.store.raw.xact.RowLocking3
All known Subclasses: org.apache.derby.impl.store.raw.xact.RowLockingRR,
| Method Summary | |
| public int | getMode()
| | protected RowLock | getReadLockType()
Get type of lock to get while reading data. | | protected RowLock | getUpdateLockType()
Get type of lock to get while requesting "update" lock. | | protected RowLock | getWriteLockType()
Get type of lock to get while writing data. | | public boolean | lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate)
Obtain container level intent lock.
This implementation of row locking is 2 level, ie. | | public boolean | lockRecordForRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean waitForLock, boolean forUpdate)
Obtain lock on record being read.
Assumes that a table level IS has been acquired. | | public void | lockRecordForRead(Latch latch, RecordHandle record, boolean forUpdate)
Obtain lock on record being read while holding a latch.
Assumes that a table level IS has been acquired. | | public boolean | lockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsert, boolean waitForLock)
Obtain lock on record being written.
Assumes that a table level IX has been acquired. | | public void | lockRecordForWrite(Latch latch, RecordHandle record)
Obtain lock on record being written while holding a latch.
Assumes that a table level IX has been acquired. | | public boolean | zeroDurationLockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsertPreviousKey, boolean waitForLock)
Obtain lock on record being written.
Assumes that a table level IX has been acquired. |
| getMode | | public int getMode()(Code) | | |
| getReadLockType | | protected RowLock getReadLockType()(Code) | | Get type of lock to get while reading data.
This routine is provided so that class's like RowLockingRR can
override just this routine to get RS2 locks vs RS3 locks, and still
reuse all the other code in this class.
The lock type of a shared lock for this locking policy. |
| getUpdateLockType | | protected RowLock getUpdateLockType()(Code) | | Get type of lock to get while requesting "update" lock.
This routine is provided so that class's like RowLockingRR can
override just this routine to get RU2 locks vs RU3 locks, and still
reuse all the other code in this class.
The lock type of a shared lock for this locking policy. |
| getWriteLockType | | protected RowLock getWriteLockType()(Code) | | Get type of lock to get while writing data.
This routine is provided so that class's like RowLockingRR can
override just this routine to get RX2 locks vs RX3 locks, and still
reuse all the other code in this class.
The lock type of a shared lock for this locking policy. |
| lockContainer | | public boolean lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate) throws StandardException(Code) | | Obtain container level intent lock.
This implementation of row locking is 2 level, ie. table and row locking.
It will interact correctly with tables opened with ContainerLocking3
locking mode.
Updater's will get table level IX locks, and X row locks.
Reader's will get table level IS locks, and S row locks.
Parameters:
t - Transaction to associate lock with.
Parameters:
container - Container to lock.
Parameters:
waitForLock - Should lock request wait until granted?
Parameters:
forUpdate - Should container be locked for update, or read? 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.
exception:
StandardException - Standard exception policy. |
| lockRecordForRead | | public boolean lockRecordForRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean waitForLock, boolean forUpdate) throws StandardException(Code) | | Obtain lock on record being read.
Assumes that a table level IS has been acquired. Will acquire a Shared
or Update lock on the row, depending on the "forUpdate" parameter.
Parameters:
t - The transaction to associate the lock with.
Parameters:
record - The record to be locked.
Parameters:
waitForLock - Should lock request wait until granted?
Parameters:
forUpdate - Whether to open for read or write access. true if the lock was granted, false if waitForLock was false and the lock could not be granted.
exception:
StandardException - Standard exception policy. |
| lockRecordForRead | | public void lockRecordForRead(Latch latch, RecordHandle record, boolean forUpdate) throws StandardException(Code) | | Obtain lock on record being read while holding a latch.
Assumes that a table level IS has been acquired. Will acquire a Shared
or Update lock on the row, depending on the "forUpdate" parameter.
Parameters:
latch - The latch being held.
Parameters:
record - The record to be locked.
Parameters:
forUpdate - Whether to open for read or write access.
exception:
StandardException - Standard exception policy. |
| lockRecordForWrite | | public boolean lockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsert, boolean waitForLock) throws StandardException(Code) | | Obtain lock on record being written.
Assumes that a table level IX has been acquired. Will acquire an
Exclusive (X) lock on the row.
Parameters:
t - The transaction to associate the lock with.
Parameters:
record - The record to be locked.
Parameters:
lockForInsert - Lock is for an insert.
Parameters:
waitForLock - Should lock request wait until granted? true if the lock was granted, false if waitForLock was false and the lock could not be granted.
exception:
StandardException - Standard exception policy. |
| lockRecordForWrite | | public void lockRecordForWrite(Latch latch, RecordHandle record) throws StandardException(Code) | | Obtain lock on record being written while holding a latch.
Assumes that a table level IX has been acquired. Will acquire an
Exclusive (X) lock on the row.
Parameters:
latch - The latch being held
Parameters:
record - The record to be locked.
exception:
StandardException - Standard exception policy. |
| zeroDurationLockRecordForWrite | | public boolean zeroDurationLockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsertPreviousKey, boolean waitForLock) throws StandardException(Code) | | Obtain lock on record being written.
Assumes that a table level IX has been acquired. Will acquire an
Exclusive (X) lock on the row.
Parameters:
t - transaction to associate the lock with.
Parameters:
record - The record to be locked.
Parameters:
lockForInsertPreviousKey - Lock is for a previous key of a insert.
Parameters:
waitForLock - Should lock request wait until granted? true if the lock was granted, false if waitForLock was false and the lock could not be granted.
exception:
StandardException - Standard exception policy. |
| Methods inherited from org.apache.derby.impl.store.raw.xact.NoLocking | public int getMode()(Code)(Java Doc)
public boolean lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate) throws StandardException(Code)(Java Doc)
public boolean lockRecordForRead(Transaction t, ContainerHandle container, RecordHandle record, boolean waitForLock, boolean forUpdate) throws StandardException(Code)(Java Doc)
public void lockRecordForRead(Latch latch, RecordHandle record, boolean forUpdate) throws StandardException(Code)(Java Doc)
public boolean lockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsert, boolean waitForLock) throws StandardException(Code)(Java Doc)
public void lockRecordForWrite(Latch latch, RecordHandle record) throws StandardException(Code)(Java Doc)
public void unlockContainer(Transaction t, ContainerHandle container)(Code)(Java Doc)
public void unlockRecordAfterRead(Transaction t, ContainerHandle container, RecordHandle record, boolean forUpdate, boolean row_qualified) throws StandardException(Code)(Java Doc)
public boolean zeroDurationLockRecordForWrite(Transaction t, RecordHandle record, boolean lockForPreviousKey, boolean waitForLock) throws StandardException(Code)(Java Doc)
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