/*
* 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.btree.jdbm;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import javax.naming.NamingException;
import jdbm.helper.MRU;
import jdbm.recman.BaseRecordManager;
import jdbm.recman.CacheRecordManager;
import org.apache.directory.server.core.partition.impl.btree.LongComparator;
import org.apache.directory.server.i18n.I18n;
import org.apache.directory.server.xdbm.ParentIdAndRdn;
import org.apache.directory.server.xdbm.ParentIdAndRdnComparator;
import org.apache.directory.shared.ldap.model.schema.AttributeType;
import org.apache.directory.shared.ldap.model.schema.MatchingRule;
import org.apache.directory.shared.ldap.model.schema.SchemaManager;
import org.apache.directory.shared.util.SynchronizedLRUMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A special index which stores Rdn objects.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class JdbmRdnIndex<E> extends JdbmIndex<ParentIdAndRdn<Long>, E>
{
/** A logger for this class */
private static final Logger LOG = LoggerFactory.getLogger( JdbmRdnIndex.class );
public JdbmRdnIndex()
{
initialized = false;
}
public JdbmRdnIndex( String attributeId )
{
initialized = false;
setAttributeId( attributeId );
}
public void init( SchemaManager schemaManager, AttributeType attributeType ) throws IOException
{
LOG.debug( "Initializing an Index for attribute '{}'", attributeType.getName() );
//System.out.println( "IDX Initializing RDNindex for AT " + attributeType.getOid() + ", wkDirPath : " + wkDirPath + ", base dir : " + this.wkDirPath );
keyCache = new SynchronizedLRUMap( cacheSize );
this.attributeType = attributeType;
if ( attributeId == null )
{
setAttributeId( attributeType.getName() );
}
if ( this.wkDirPath == null )
{
NullPointerException e = new NullPointerException( "The index working directory has not be set" );
e.printStackTrace();
throw e;
}
String path = new File( this.wkDirPath, attributeType.getOid() ).getAbsolutePath();
//System.out.println( "IDX Created index " + path );
BaseRecordManager base = new BaseRecordManager( path );
base.disableTransactions();
this.recMan = new CacheRecordManager( base, new MRU( cacheSize ) );
try
{
initTables( schemaManager );
}
catch ( IOException e )
{
// clean up
close();
throw e;
}
// finally write a text file in the format <OID>-<attribute-name>.txt
FileWriter fw = new FileWriter( new File( path + "-" + attributeType.getName() + ".txt" ) );
// write the AttributeType description
fw.write( attributeType.toString() );
fw.close();
initialized = true;
}
/**
* Initializes the forward and reverse tables used by this Index.
*
* @param schemaManager The server schemaManager
* @throws IOException if we cannot initialize the forward and reverse
* tables
* @throws NamingException
*/
private void initTables( SchemaManager schemaManager ) throws IOException
{
MatchingRule mr = attributeType.getEquality();
if ( mr == null )
{
throw new IOException( I18n.err( I18n.ERR_574, attributeType.getName() ) );
}
ParentIdAndRdnComparator<Long> comp = new ParentIdAndRdnComparator<Long>( mr.getOid() );
LongComparator.INSTANCE.setSchemaManager( schemaManager );
forward = new JdbmTable<ParentIdAndRdn<Long>, Long>( schemaManager, attributeType.getOid() + FORWARD_BTREE,
recMan, comp, null, LongSerializer.INSTANCE );
reverse = new JdbmTable<Long, ParentIdAndRdn<Long>>( schemaManager, attributeType.getOid() + REVERSE_BTREE,
recMan, LongComparator.INSTANCE, LongSerializer.INSTANCE, null );
}
public void add( ParentIdAndRdn<Long> rdn, Long entryId ) throws Exception
{
forward.put( rdn, entryId );
reverse.put( entryId, rdn );
}
public void drop( Long entryId ) throws Exception
{
ParentIdAndRdn<Long> rdn = reverse.get( entryId );
forward.remove( rdn );
reverse.remove( entryId );
}
public void drop( ParentIdAndRdn<Long> rdn, Long id ) throws Exception
{
long val = forward.get( rdn );
if ( val == id )
{
forward.remove( rdn );
reverse.remove( val );
}
}
public ParentIdAndRdn<Long> getNormalized( ParentIdAndRdn<Long> rdn ) throws Exception
{
return rdn;
}
}