org.apache.ojb.odmg.locking
Interface LockStrategy

All Known Implementing Classes:

AbstractLockStrategy, LockStrategyFactory.NOOPStrategy, ReadCommittedStrategy, ReadUncommittedStrategy, RepeatableReadStrategy, SerializableStrategy

Deprecated.

public interface LockStrategy

this interface defines method that a Locking Strategy must implement according to the transaction isolation level it represents.

Method Summary

boolean	checkRead(TransactionImpl tx, Object obj) Deprecated. checks whether the specified Object obj is read-locked by Transaction tx.
boolean	checkWrite(TransactionImpl tx, Object obj) Deprecated. checks whether the specified Object obj is write-locked by Transaction tx.
boolean	readLock(TransactionImpl tx, Object obj) Deprecated. acquire a read lock on Object obj for Transaction tx.
boolean	releaseLock(TransactionImpl tx, Object obj) Deprecated. release a lock on Object obj for Transaction tx.
boolean	upgradeLock(TransactionImpl tx, Object obj) Deprecated. acquire a lock upgrade (from read to write) lock on Object obj for Transaction tx.
boolean	writeLock(TransactionImpl tx, Object obj) Deprecated. acquire a write lock on Object obj for Transaction tx.

Method Detail

readLock

boolean readLock(TransactionImpl tx,
                 Object obj)

Deprecated.

acquire a read lock on Object obj for Transaction tx.

Parameters:

tx - the transaction requesting the lock

obj - the Object to be locked

Returns:

true if successful, else false

writeLock

boolean writeLock(TransactionImpl tx,
                  Object obj)

Deprecated.

acquire a write lock on Object obj for Transaction tx.

Parameters:

tx - the transaction requesting the lock

obj - the Object to be locked

Returns:

true if successful, else false

upgradeLock

boolean upgradeLock(TransactionImpl tx,
                    Object obj)

Deprecated.

acquire a lock upgrade (from read to write) lock on Object obj for Transaction tx.

Parameters:

tx - the transaction requesting the lock

obj - the Object to be locked

Returns:

true if successful, else false

releaseLock

boolean releaseLock(TransactionImpl tx,
                    Object obj)

Deprecated.

release a lock on Object obj for Transaction tx.

Parameters:

tx - the transaction releasing the lock

obj - the Object to be unlocked

Returns:

true if successful, else false

checkRead

boolean checkRead(TransactionImpl tx,
                  Object obj)

Deprecated.

checks whether the specified Object obj is read-locked by Transaction tx.

Parameters:

tx - the transaction

obj - the Object to be checked

Returns:

true if lock exists, else false

checkWrite

boolean checkWrite(TransactionImpl tx,
                   Object obj)

Deprecated.

checks whether the specified Object obj is write-locked by Transaction tx.

Parameters:

tx - the transaction

obj - the Object to be checked

Returns:

true if lock exists, else false