org.apache.jackrabbit.core.journal
Class JournalLock

java.lang.Object
  EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock
      EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock
          org.apache.jackrabbit.core.journal.JournalLock

All Implemented Interfaces:

EDU.oswego.cs.dl.util.concurrent.ReadWriteLock

public class JournalLock
extends EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

A reentrant read-write lock used by the Journal for synchronization. Unlike a normal reentrant lock, this one allows the lock to be re-entered not just by a thread that's already holding the lock but by any thread within the same transaction.

Nested Class Summary

Nested classes/interfaces inherited from class EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock

EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.ReaderLock, EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.Signaller, EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.WriterLock

Field Summary

Fields inherited from class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

IONE, readers_, writeHolds_

Fields inherited from class EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock

activeReaders_, activeWriter_, readerLock_, waitingReaders_, waitingWriters_, writerLock_

Constructor Summary

JournalLock()

Method Summary

protected boolean	allowReader()
protected EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.Signaller	endRead()
protected EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.Signaller	endWrite()
protected boolean	startRead()
protected boolean	startWrite()

Methods inherited from class EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock

cancelledWaitingReader, cancelledWaitingWriter, readLock, startReadFromNewReader, startReadFromWaitingReader, startWriteFromNewWriter, startWriteFromWaitingWriter, writeLock

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JournalLock

public JournalLock()

Method Detail

allowReader

protected boolean allowReader()

Overrides:

allowReader in class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

startWrite

protected boolean startWrite()

Overrides:

startWrite in class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

endWrite

protected EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.Signaller endWrite()

Overrides:

endWrite in class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

startRead

protected boolean startRead()

Overrides:

startRead in class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

endRead

protected EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock.Signaller endRead()

Overrides:

endRead in class EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock