| java.lang.Object
 org.apache.ojb.odmg.locking.AbstractLockStrategy
All known Subclasses: org.apache.ojb.odmg.locking.RepeatableReadStrategy, org.apache.ojb.odmg.locking.SerializableStrategy, org.apache.ojb.odmg.locking.ReadCommittedStrategy, org.apache.ojb.odmg.locking.ReadUncommittedStrategy,
| AbstractLockStrategy | | abstract public class AbstractLockStrategy implements LockStrategy(Code) | | The base class of all LockingStrategies. It provides the basic
infrastructure to read and write locks to the persistent storage.
author:
Thomas Mahler |
| Method Summary | |
| protected boolean | addReader(TransactionImpl tx, Object obj)
Add a reader lock entry for transaction tx on object obj
to the persistent storage. | | protected Collection | getReaders(Object obj)
returns a collection of Reader LockEntries for object obj. | | protected LockEntry | getWriter(Object obj)
returns the LockEntry for the Writer of object obj. | | protected boolean | hasReadLock(TransactionImpl tx, Object obj)
check if there is a reader lock entry for transaction tx on object obj
in the persistent storage. | | protected void | removeReader(TransactionImpl tx, Object obj)
remove a reader lock entry for transaction tx on object obj
from the persistent storage. | | protected void | removeWriter(LockEntry writer)
remove a writer lock entry for transaction tx on object obj
from the persistent storage. | | protected boolean | setWriter(TransactionImpl tx, Object obj)
generate a writer lock entry for transaction tx on object obj
and write it to the persistent storage. | | protected boolean | upgradeLock(LockEntry reader)
upgrade a reader lock entry for transaction tx on object obj
and write it to the persistent storage. |
| DEFAULT_LOCK_TIMEOUT | | public static long DEFAULT_LOCK_TIMEOUT(Code) | | the timeout for lock entries
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| AbstractLockStrategy | | public AbstractLockStrategy()(Code) | | |
| addReader | | protected boolean addReader(TransactionImpl tx, Object obj)(Code) | | Add a reader lock entry for transaction tx on object obj
to the persistent storage.
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| getReaders | | protected Collection getReaders(Object obj)(Code) | | returns a collection of Reader LockEntries for object obj.
If now LockEntries could be found an empty Vector is returned.
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| getWriter | | protected LockEntry getWriter(Object obj)(Code) | | returns the LockEntry for the Writer of object obj.
If now writer exists, null is returned.
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| hasReadLock | | protected boolean hasReadLock(TransactionImpl tx, Object obj)(Code) | | check if there is a reader lock entry for transaction tx on object obj
in the persistent storage.
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| removeReader | | protected void removeReader(TransactionImpl tx, Object obj)(Code) | | remove a reader lock entry for transaction tx on object obj
from the persistent storage.
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| removeWriter | | protected void removeWriter(LockEntry writer)(Code) | | remove a writer lock entry for transaction tx on object obj
from the persistent storage.
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| setWriter | | protected boolean setWriter(TransactionImpl tx, Object obj)(Code) | | generate a writer lock entry for transaction tx on object obj
and write it to the persistent storage.
|
| upgradeLock | | protected boolean upgradeLock(LockEntry reader)(Code) | | upgrade a reader lock entry for transaction tx on object obj
and write it to the persistent storage.
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