org.compass.needle.terracotta
Class ManagedTerracottaLockAdapter

java.lang.Object
  org.apache.lucene.store.Lock
      org.compass.needle.terracotta.ManagedTerracottaLockAdapter

public class ManagedTerracottaLockAdapter
extends Lock

An adapter ontop of a lock that releases the managed read lock when trying to obtain a Lucene lock and obtains the read lock again once the Lucene lock obtain is done. It is done in order to prevent dead locks when several clients/threads obtain the read lock when the "transaction" starts, and they wait for the lucene lock without actually releasing the read lock for other "write locks (the add file)" to be able to be obtained.

Author:

kimchy

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.store.Lock

Lock.With

Field Summary

Fields inherited from class org.apache.lucene.store.Lock

failureReason, LOCK_OBTAIN_WAIT_FOREVER, LOCK_POLL_INTERVAL

Constructor Summary

ManagedTerracottaLockAdapter(ReadWriteLock rwl, Lock lock)

Method Summary

boolean	isLocked()
boolean	obtain()
boolean	obtain(long lockWaitTimeout)
void	release()

Methods inherited from class java.lang.Object

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

Constructor Detail

ManagedTerracottaLockAdapter

public ManagedTerracottaLockAdapter(ReadWriteLock rwl,
                                    Lock lock)

Method Detail

obtain

public boolean obtain(long lockWaitTimeout)
               throws LockObtainFailedException,
                      IOException

Overrides:

obtain in class Lock

Throws:

LockObtainFailedException

IOException

obtain

public boolean obtain()
               throws IOException

Specified by:

obtain in class Lock

Throws:

IOException

release

public void release()
             throws IOException

Specified by:

release in class Lock

Throws:

IOException

isLocked

public boolean isLocked()

Specified by:

isLocked in class Lock