/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.server.core.partition.impl.avl;
import java.net.URI;
import org.apache.directory.server.constants.ApacheSchemaConstants;
import org.apache.directory.server.core.partition.impl.btree.AbstractBTreePartition;
import org.apache.directory.server.core.partition.impl.btree.LongComparator;
import org.apache.directory.server.xdbm.Index;
import org.apache.directory.server.xdbm.impl.avl.AvlIndex;
import org.apache.directory.server.xdbm.impl.avl.AvlMasterTable;
import org.apache.directory.server.xdbm.impl.avl.AvlRdnIndex;
import org.apache.directory.server.xdbm.search.impl.CursorBuilder;
import org.apache.directory.server.xdbm.search.impl.DefaultOptimizer;
import org.apache.directory.server.xdbm.search.impl.DefaultSearchEngine;
import org.apache.directory.server.xdbm.search.impl.EvaluatorBuilder;
import org.apache.directory.server.xdbm.search.impl.NoOpOptimizer;
import org.apache.directory.shared.ldap.model.entry.Entry;
import org.apache.directory.shared.ldap.model.schema.SchemaManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* An XDBM Partition backed by in memory AVL Trees.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class AvlPartition extends AbstractBTreePartition<Long>
{
/** static logger */
private static final Logger LOG = LoggerFactory.getLogger( AvlPartition.class );
/**
* Creates a store based on AVL Trees.
*/
public AvlPartition( SchemaManager schemaManager )
{
super( schemaManager );
}
/**
* {@inheritDoc}
*/
protected void doInit() throws Exception
{
if ( !initialized )
{
EvaluatorBuilder<Long> evaluatorBuilder = new EvaluatorBuilder<Long>( this, schemaManager );
CursorBuilder<Long> cursorBuilder = new CursorBuilder<Long>( this, evaluatorBuilder );
// setup optimizer and registries for parent
if ( !optimizerEnabled )
{
optimizer = new NoOpOptimizer();
}
else
{
optimizer = new DefaultOptimizer<Entry, Long>( this );
}
searchEngine = new DefaultSearchEngine<Long>( this, cursorBuilder, evaluatorBuilder, optimizer );
if ( isInitialized() )
{
return;
}
// Create the master table (the table containing all the entries)
master = new AvlMasterTable<Entry>( id, new LongComparator(), null, false );
super.doInit();
}
}
/**
* {@inheritDoc}
*/
public Long getDefaultId()
{
return 1L;
}
/**
* {@inheritDoc}
*/
public Long getRootId()
{
return 0L;
}
/**
* {@inheritDoc}
*/
public void sync() throws Exception
{
// Nothing to do
}
/**
* always returns false, cause this is a in-memory store
*/
@Override
public boolean isSyncOnWrite()
{
return false;
}
/**
* Always returns 0 (zero), cause this is a in-memory store
*/
@Override
public int getCacheSize()
{
return 0;
}
@Override
protected Index<?, Entry, Long> convertAndInit( Index<?, Entry, Long> index ) throws Exception
{
AvlIndex<?, Entry> avlIndex;
if ( index.getAttributeId().equals( ApacheSchemaConstants.APACHE_RDN_AT_OID ) )
{
avlIndex = new AvlRdnIndex<Entry>( index.getAttributeId() );
}
else if ( index instanceof AvlIndex<?, ?> )
{
avlIndex = (AvlIndex<?, Entry> ) index;
}
else
{
LOG.debug( "Supplied index {} is not a AvlIndex. "
+ "Will create new AvlIndex using copied configuration parameters.", index );
avlIndex = new AvlIndex( index.getAttributeId() );
}
avlIndex.init( schemaManager, schemaManager.lookupAttributeTypeRegistry( index.getAttributeId() ) );
return avlIndex;
}
/**
* {@inheritDoc}
*/
public URI getPartitionPath()
{
// It's a in-memory partition, return null
return null;
}
}