org.infinispan.lucene.impl

Class TransactionalLockFactory

java.lang.Object

org.apache.lucene.store.LockFactory

org.infinispan.lucene.impl.TransactionalLockFactory

public class TransactionalLockFactory
extends org.apache.lucene.store.LockFactory

Factory for locks obtained in InfinispanDirectory, this factory produces instances of TransactionalSharedLuceneLock.

Usually Lucene acquires the lock when creating an IndexWriter and releases it when closing it; these open-close operations are mapped to transactions as begin-commit, so all changes are going to be effective at IndexWriter close. The advantage is that a transaction rollback will be able to undo all changes applied to the index, but this requires enough memory to hold all the changes until the commit.

Using a TransactionalSharedLuceneLock is not compatible with Lucene's default MergeScheduler: use an in-thread implementation like SerialMergeScheduler indexWriter.setMergeScheduler( new SerialMergeScheduler() );

Since:

4.0

Author:

Sanne Grinovero, Lukasz Moren

See Also:

TransactionalSharedLuceneLock, SerialMergeScheduler

Field Summary

Fields

Modifier and Type	Field and Description
static TransactionalLockFactory	INSTANCE

Constructor Summary

Constructors

Constructor and Description
TransactionalLockFactory()

Method Summary

Modifier and Type	Method and Description
org.infinispan.lucene.impl.TransactionalSharedLuceneLock	obtainLock(org.apache.lucene.store.Directory dir, String lockName)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final TransactionalLockFactory INSTANCE

Constructor Detail

TransactionalLockFactory

public TransactionalLockFactory()

Method Detail

obtainLock

public org.infinispan.lucene.impl.TransactionalSharedLuceneLock obtainLock(org.apache.lucene.store.Directory dir,
                                                                           String lockName)
                                                                    throws IOException

Specified by:

obtainLock in class org.apache.lucene.store.LockFactory

Throws:

IOException