/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.backends.jeb;
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import com.sleepycat.je.*;
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import org.opends.server.types.DN;
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import org.opends.server.util.StaticUtils;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import org.opends.server.loggers.debug.DebugTracer;
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import java.util.Comparator;
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/**
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* This class represents the DN database, or dn2id, which has one record
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* for each entry. The key is the normalized entry DN and the value
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* is the entry ID.
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*/
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public class DN2ID extends DatabaseContainer
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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/**
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* The key comparator used for the DN database.
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*/
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private Comparator<byte[]> dn2idComparator;
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/**
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* Create a DN2ID instance for the DN database in a given entryContainer.
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*
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* @param name The name of the DN database.
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* @param env The JE environment.
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* @param entryContainer The entryContainer of the DN database.
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* @throws DatabaseException If an error occurs in the JE database.
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*/
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@SuppressWarnings("unchecked")
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DN2ID(String name, Environment env, EntryContainer entryContainer)
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throws DatabaseException
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{
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super(name, env, entryContainer);
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dn2idComparator = new EntryContainer.KeyReverseComparator();
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DatabaseConfig dn2idConfig = new DatabaseConfig();
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if(env.getConfig().getReadOnly())
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{
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dn2idConfig.setReadOnly(true);
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dn2idConfig.setAllowCreate(false);
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dn2idConfig.setTransactional(false);
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}
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else if(!env.getConfig().getTransactional())
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{
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dn2idConfig.setAllowCreate(true);
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dn2idConfig.setTransactional(false);
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dn2idConfig.setDeferredWrite(true);
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}
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else
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{
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dn2idConfig.setAllowCreate(true);
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dn2idConfig.setTransactional(true);
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}
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this.dbConfig = dn2idConfig;
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//This line causes an unchecked cast error if the SuppressWarnings
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//annotation is removed at the beginning of this method.
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this.dbConfig.setBtreeComparator((Class<? extends Comparator<byte[]>>)
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dn2idComparator.getClass());
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}
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/**
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* Create a DN database key from an entry DN.
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* @param dn The entry DN.
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* @return A DatabaseEntry containing the key.
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*/
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private static DatabaseEntry DNdata(DN dn)
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{
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byte[] normDN = StaticUtils.getBytes(dn.toNormalizedString());
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return new DatabaseEntry(normDN);
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}
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/**
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* Insert a new record into the DN database.
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* @param txn A JE database transaction to be used for the database operation,
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* or null if none.
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* @param dn The entry DN, which is the key to the record.
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* @param id The entry ID, which is the value of the record.
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* @return true if the record was inserted, false if a record with that key
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* already exists.
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* @throws DatabaseException If an error occurred while attempting to insert
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* the new record.
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*/
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public boolean insert(Transaction txn, DN dn, EntryID id)
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throws DatabaseException
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{
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DatabaseEntry key = DNdata(dn);
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DatabaseEntry data = id.getDatabaseEntry();
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OperationStatus status;
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status = insert(txn, key, data);
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if (status != OperationStatus.SUCCESS)
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{
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return false;
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}
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return true;
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}
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/**
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* Write a record to the DN database. If a record with the given key already
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* exists, the record will be replaced, otherwise a new record will be
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* inserted.
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* @param txn A JE database transaction to be used for the database operation,
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* or null if none.
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* @param dn The entry DN, which is the key to the record.
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* @param id The entry ID, which is the value of the record.
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* @return true if the record was written, false if it was not written.
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* @throws DatabaseException If an error occurred while attempting to write
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* the record.
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*/
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public boolean put(Transaction txn, DN dn, EntryID id)
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throws DatabaseException
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{
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DatabaseEntry key = DNdata(dn);
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DatabaseEntry data = id.getDatabaseEntry();
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OperationStatus status;
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status = put(txn, key, data);
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if (status != OperationStatus.SUCCESS)
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{
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return false;
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}
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return true;
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}
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/**
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* Write a record to the DN database, where the key and value are already
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* formatted.
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* @param txn A JE database transaction to be used for the database operation,
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* or null if none.
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* @param key A DatabaseEntry containing the record key.
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* @param data A DatabaseEntry containing the record value.
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* @return true if the record was written, false if it was not written.
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* @throws DatabaseException If an error occurred while attempting to write
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* the record.
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*/
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public boolean putRaw(Transaction txn, DatabaseEntry key, DatabaseEntry data)
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throws DatabaseException
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{
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OperationStatus status;
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status = put(txn, key, data);
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if (status != OperationStatus.SUCCESS)
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{
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return false;
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}
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return true;
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}
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/**
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* Remove a record from the DN database.
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* @param txn A JE database transaction to be used for the database operation,
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* or null if none.
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* @param dn The entry DN, which is the key to the record.
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* @return true if the record was removed, false if it was not removed.
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* @throws DatabaseException If an error occurred while attempting to remove
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* the record.
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*/
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public boolean remove(Transaction txn, DN dn)
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throws DatabaseException
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{
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DatabaseEntry key = DNdata(dn);
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OperationStatus status = delete(txn, key);
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if (status != OperationStatus.SUCCESS)
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{
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return false;
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}
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return true;
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}
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/**
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* Fetch the entry ID for a given DN.
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* @param txn A JE database transaction to be used for the database read, or
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* null if none is required.
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* @param dn The DN for which the entry ID is desired.
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* @param lockMode The JE locking mode to be used for the read.
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* @return The entry ID, or null if the given DN is not in the DN database.
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* @throws DatabaseException If an error occurs in the JE database.
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*/
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public EntryID get(Transaction txn, DN dn, LockMode lockMode)
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throws DatabaseException
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{
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DatabaseEntry key = DNdata(dn);
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DatabaseEntry data = new DatabaseEntry();
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OperationStatus status;
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status = read(txn, key, data, LockMode.DEFAULT);
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if (status != OperationStatus.SUCCESS)
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{
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return null;
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}
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return new EntryID(data);
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}
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/**
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* Gets the comparator for records stored in this database.
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*
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* @return The comparator for records stored in this database.
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*/
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public Comparator<byte[]> getComparator()
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{
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return dn2idComparator;
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}
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}
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