Java Doc for RowLocking2nohold.java in » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » store » raw » xact » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.raw.xact

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.apache.derby.impl.store.raw.xact .NoLocking

org.apache.derby.impl.store.raw.xact .RowLocking3

org.apache.derby.impl.store.raw.xact .RowLockingRR

org.apache.derby.impl.store.raw.xact .RowLocking2

org.apache.derby.impl.store.raw.xact .RowLocking2nohold

RowLocking2nohold
public class RowLocking2nohold extends RowLocking2 (Code)
	A locking policy that implements row level locking with isolation degree 2, never holding read locks after they are granted. Exactly the same as RowLocking2, except that read locks are acquired using zeroDuration locks, which are immediately released by the lock manager after they are granted. See Also: org.apache.derby.iapi.store.raw.LockingPolicy

Constructor Summary
protected	RowLocking2nohold(LockFactory lf)

Method Summary
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	unlockRecordAfterRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean forUpdate, boolean row_qualified)

Constructor Detail

RowLocking2nohold
protected RowLocking2nohold(LockFactory lf)(Code)

Method Detail

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.

Read lock will be acquired using zeroDuration lock.
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.

unlockRecordAfterRead
public void unlockRecordAfterRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean forUpdate, boolean row_qualified)(Code)

Methods inherited from org.apache.derby.impl.store.raw.xact.RowLocking2

public boolean lockContainer(Transaction t, ContainerHandle container, boolean waitForLock, boolean forUpdate) throws StandardException(Code)(Java Doc)
public boolean lockRecordForRead(Transaction t, ContainerHandle container_handle, 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 void unlockContainer(Transaction t, ContainerHandle container_handle)(Code)(Java Doc)
public void unlockRecordAfterRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean forUpdate, boolean row_qualified) throws StandardException(Code)(Java Doc)

Methods inherited from org.apache.derby.impl.store.raw.xact.RowLockingRR

protected RowLock getReadLockType()(Code)(Java Doc)
protected RowLock getUpdateLockType()(Code)(Java Doc)
protected RowLock getWriteLockType()(Code)(Java Doc)
public void unlockRecordAfterRead(Transaction t, ContainerHandle container_handle, RecordHandle record, boolean forUpdate, boolean row_qualified) throws StandardException(Code)(Java Doc)

Fields inherited from org.apache.derby.impl.store.raw.xact.RowLocking3

final protected LockFactory lf(Code)(Java Doc)

Methods inherited from org.apache.derby.impl.store.raw.xact.RowLocking3

public int getMode()(Code)(Java Doc)
protected RowLock getReadLockType()(Code)(Java Doc)
protected RowLock getUpdateLockType()(Code)(Java Doc)
protected RowLock getWriteLockType()(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_handle, 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 boolean zeroDurationLockRecordForWrite(Transaction t, RecordHandle record, boolean lockForInsertPreviousKey, boolean waitForLock) throws StandardException(Code)(Java Doc)

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)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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