Constructor Detail

• NoLocking

  protected NoLocking()

Method Detail

• lockContainer

  public boolean lockContainer​(Transaction t,
                               ContainerHandle container,
                               boolean waitForLock,
                               boolean forUpdate)
                        throws StandardException

  Description copied from interface: LockingPolicy
  Called when a container is opened.

  Specified by:

  lockContainer in interface LockingPolicy

  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)

  Description copied from interface: LockingPolicy
  Called when a container is closed.

  Specified by:

  unlockContainer in interface LockingPolicy

  See Also:

  ContainerHandle, ContainerHandle.close()

• lockRecordForRead

  public boolean lockRecordForRead​(Transaction t,
                                   ContainerHandle container,
                                   RecordHandle record,
                                   boolean waitForLock,
                                   boolean forUpdate)
                            throws StandardException

  Description copied from interface: LockingPolicy
  Called before a record is fetched.

  Specified by:

  lockRecordForRead in interface LockingPolicy

  Parameters:

  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?

  Throws:

  StandardException - Standard Derby error policy

  See Also:

  Page

• zeroDurationLockRecordForWrite

  public boolean zeroDurationLockRecordForWrite​(Transaction t,
                                                RecordHandle record,
                                                boolean lockForPreviousKey,
                                                boolean waitForLock)
                                         throws StandardException

  Description copied from interface: LockingPolicy
  Request a write lock which will be released immediately upon grant.

  Specified by:

  zeroDurationLockRecordForWrite in interface LockingPolicy

  Parameters:

  t - Transaction to associate lock with.

  record - Record to lock.

  lockForPreviousKey - Lock is for a previous key of a insert.

  waitForLock - Should lock request wait until granted?

  Returns:

  true if the lock was obtained, false if it wasn't. False should only be returned if the waitForLock argument was set to "false," and the lock was unavailable.

  Throws:

  StandardException - Standard Derby error policy

  See Also:

  Page

• lockRecordForWrite

  public boolean lockRecordForWrite​(Transaction t,
                                    RecordHandle record,
                                    boolean lockForInsert,
                                    boolean waitForLock)
                             throws StandardException

  Description copied from interface: LockingPolicy
  Called before a record is inserted, updated or deleted. If zeroDuration is true then lock is released immediately after it has been granted.

  Specified by:

  lockRecordForWrite in interface LockingPolicy

  Parameters:

  t - Transaction to associate lock with.

  record - Record to lock.

  lockForInsert - Lock is for an insert.

  waitForLock - Should lock request wait until granted?

  Returns:

  true if the lock was obtained, false if it wasn't. False should only be returned if the waitForLock argument was set to "false," and the lock was unavailable.

  Throws:

  StandardException - Standard Derby error policy

  See Also:

  Page

• unlockRecordAfterRead

  public void unlockRecordAfterRead​(Transaction t,
                                    ContainerHandle container,
                                    RecordHandle record,
                                    boolean forUpdate,
                                    boolean row_qualified)
                             throws StandardException

  Description copied from interface: LockingPolicy
  Called after a record has been fetched.

  Specified by:

  unlockRecordAfterRead in interface LockingPolicy

  Throws:

  StandardException - Standard Derby error policy

  See Also:

  Page

• getMode

  public int getMode()

  Description copied from interface: LockingPolicy
  Get the mode of this policy

  Specified by:

  getMode in interface LockingPolicy