org.infinispan.lucene.locking.BaseLockFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of infinispan-embedded-query
Show all versions of infinispan-embedded-query
Infinispan Embedded Query All-in-One module
package org.infinispan.lucene.locking;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.store.LockFactory;
import org.infinispan.Cache;
import org.infinispan.context.Flag;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
/**
* Default factory for locks obtained in InfinispanDirectory
,
* this factory produces instances of BaseLuceneLock
.
*
* @since 4.0
* @author Sanne Grinovero
* @see org.infinispan.lucene.locking.BaseLuceneLock
*/
@SuppressWarnings("unchecked")
public class BaseLockFactory extends LockFactory {
static final String DEF_LOCK_NAME = IndexWriter.WRITE_LOCK_NAME;
private static final Log log = LogFactory.getLog(BaseLockFactory.class);
private final Cache cache;
private final String indexName;
private final BaseLuceneLock defLock;
public BaseLockFactory(Cache cache, String indexName) {
this.cache = cache.getAdvancedCache().withFlags(Flag.SKIP_INDEXING);
this.indexName = indexName;
defLock = new BaseLuceneLock(this.cache, indexName, DEF_LOCK_NAME);
}
/**
* {@inheritDoc}
*/
@Override
public BaseLuceneLock makeLock(String lockName) {
BaseLuceneLock lock;
//It appears Lucene always uses the same name so we give locks
//having this name a special treatment:
if (DEF_LOCK_NAME.equals(lockName)) {
lock = defLock;
}
else {
// this branch is never taken with current Lucene version.
lock = new BaseLuceneLock(cache, indexName, lockName);
}
if (log.isTraceEnabled()) {
log.tracef("Lock prepared, not acquired: %s for index %s", lockName, indexName);
}
return lock;
}
/**
* {@inheritDoc}
*/
@Override
public void clearLock(String lockName) {
//Same special care as above for locks named DEF_LOCK_NAME:
if (DEF_LOCK_NAME.equals(lockName)) {
defLock.clearLock();
}
else {
new BaseLuceneLock(cache, indexName, lockName).clearLock();
}
if (log.isTraceEnabled()) {
log.tracef("Removed lock: %s for index %s", lockName, indexName);
}
}
}