| java.lang.Object
 com.quadcap.sql.lock.LockManager
| LockManager | | public class LockManager (Code) | | Manage a hierarchical set of read/write/intention locks.
author:
Stan Bailes |
| Method Summary | |
| void | acquireLock(HeldLock h)
| | final void | checkParentsLockMode(Transaction t, Lock lock, int mode)
Ensure that the lock's parent(s) are properly locked, to enable
locking lock in the specified mode. | | final boolean | couldLockWithParentMode(int pmode, int mode)
| | public Transaction | findTransaction(long transId)
Find an existing transaction. | | final public Lock | getLock(Transaction t, Lock parent, String name, int mode)
Instantiate the specified lock on behalf of transaction 't',
which may or may not already have this lock. | | final HeldLock | getLockForTransaction(Transaction t, Lock lock)
| | final public Transaction | getTransaction(long transId)
Allocate a new Transaction. | | final Iterator | locksForTransaction(Transaction t)
Return an Iterator over the held locks positioned at the first
lock owned by transaction 't'. | | void | promoteLock(HeldLock h, int mode)
| | public void | releaseTransaction(Transaction t)
| | public String | toString()
| | public Iterator | transactions()
| | final Sync | waitForLock(HeldLock h)
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| tmpHeld | | HeldLock tmpHeld(Code) | | Temp held lock object used for searching
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| LockManager | | public LockManager()(Code) | | Constructor
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| checkParentsLockMode | | final void checkParentsLockMode(Transaction t, Lock lock, int mode)(Code) | | Ensure that the lock's parent(s) are properly locked, to enable
locking lock in the specified mode.
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| couldLockWithParentMode | | final boolean couldLockWithParentMode(int pmode, int mode)(Code) | | |
| findTransaction | | public Transaction findTransaction(long transId)(Code) | | Find an existing transaction. Return null if the specified
transaction doesn't exist.
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| getLock | | final public Lock getLock(Transaction t, Lock parent, String name, int mode) throws SQLException(Code) | | Instantiate the specified lock on behalf of transaction 't',
which may or may not already have this lock.
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| getTransaction | | final public Transaction getTransaction(long transId)(Code) | | Allocate a new Transaction. All lock operations are performed
on behalf of a Transaction.
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| locksForTransaction | | final Iterator locksForTransaction(Transaction t)(Code) | | Return an Iterator over the held locks positioned at the first
lock owned by transaction 't'.
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| releaseTransaction | | public void releaseTransaction(Transaction t)(Code) | | End a transaction, releasing all of its locks
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| transactions | | public Iterator transactions()(Code) | | Return an iterator over all active transactions
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