001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 *
019 */
020package org.apache.directory.server.core.partition.impl.btree.jdbm;
021
022
023import java.io.IOException;
024import java.util.UUID;
025
026import jdbm.RecordManager;
027import jdbm.helper.Serializer;
028
029import org.apache.directory.api.ldap.model.entry.Entry;
030import org.apache.directory.api.ldap.model.schema.SchemaManager;
031import org.apache.directory.api.ldap.model.schema.comparators.UuidComparator;
032import org.apache.directory.server.xdbm.MasterTable;
033
034
035/**
036 * The master table used to store the Attributes of entries.
037 *
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 */
040public class JdbmMasterTable extends JdbmTable<String, Entry> implements MasterTable
041{
042    /**
043     * Creates the master table using JDBM B+Trees for the backing store.
044     *
045     * @param recMan the JDBM record manager
046     * @param schemaManager the schema manager
047     * @throws IOException if there is an error opening the Db file.
048     */
049    public JdbmMasterTable( RecordManager recMan, SchemaManager schemaManager ) throws IOException
050    {
051        super( schemaManager, DBF, recMan, UuidComparator.INSTANCE, UuidSerializer.INSTANCE,
052            new EntrySerializer( schemaManager ) );
053
054        UuidComparator.INSTANCE.setSchemaManager( schemaManager );
055    }
056
057
058    protected JdbmMasterTable( RecordManager recMan, SchemaManager schemaManager, String dbName, Serializer serializer )
059        throws Exception
060    {
061        super( schemaManager, DBF, recMan, UuidComparator.INSTANCE, UuidSerializer.INSTANCE, serializer );
062    }
063
064
065    /**
066     * Get's the next value from this SequenceBDb.  This has the side-effect of
067     * changing the current sequence values permanently in memory and on disk.
068     * Master table sequence begins at BigInteger.ONE.  The BigInteger.ZERO is
069     * used for the fictitious parent of the suffix root entry.
070     *
071     * @return the current value incremented by one.
072     */
073    public String getNextId( Entry entry )
074    {
075        return UUID.randomUUID().toString();
076    }
077}