/*
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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 2008-2009 Sun Microsystems, Inc.
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* Portions copyright 2013 ForgeRock AS.
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*/
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package org.opends.server.backends.jeb;
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import static org.opends.messages.JebMessages.*;
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import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
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import static org.opends.server.loggers.debug.DebugLogger.getTracer;
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import java.io.IOException;
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import java.util.Collection;
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import java.util.LinkedList;
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import java.util.List;
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import org.opends.messages.Message;
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import org.opends.server.api.CompressedSchema;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.protocols.asn1.ASN1;
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import org.opends.server.protocols.asn1.ASN1Exception;
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import org.opends.server.protocols.asn1.ASN1Reader;
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import org.opends.server.protocols.asn1.ASN1Writer;
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import org.opends.server.types.ByteStringBuilder;
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import org.opends.server.types.DebugLogLevel;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.InitializationException;
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import com.sleepycat.je.Cursor;
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import com.sleepycat.je.Database;
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import com.sleepycat.je.DatabaseConfig;
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import com.sleepycat.je.DatabaseEntry;
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import com.sleepycat.je.DatabaseException;
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import com.sleepycat.je.Environment;
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import com.sleepycat.je.LockConflictException;
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import com.sleepycat.je.LockMode;
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import com.sleepycat.je.OperationStatus;
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/**
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* This class provides a compressed schema implementation whose definitions are
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* stored in a Berkeley DB JE database.
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*/
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public final class JECompressedSchema extends CompressedSchema
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{
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/**
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* The name of the database used to store compressed attribute description
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* definitions.
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*/
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private static final String DB_NAME_AD = "compressed_attributes";
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/**
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* The name of the database used to store compressed object class set
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* definitions.
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*/
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private static final String DB_NAME_OC = "compressed_object_classes";
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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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// The compressed attribute description schema database.
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private Database adDatabase;
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// The environment in which the databases are held.
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private Environment environment;
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// The compresesd object class set schema database.
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private Database ocDatabase;
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private final ByteStringBuilder storeAttributeWriterBuffer =
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new ByteStringBuilder();
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private final ASN1Writer storeAttributeWriter = ASN1
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.getWriter(storeAttributeWriterBuffer);
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private final ByteStringBuilder storeObjectClassesWriterBuffer =
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new ByteStringBuilder();
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private final ASN1Writer storeObjectClassesWriter = ASN1
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.getWriter(storeObjectClassesWriterBuffer);
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/**
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* Creates a new instance of this JE compressed schema manager.
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*
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* @param environment
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* A reference to the database environment in which the databases
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* will be held.
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* @throws DatabaseException
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* If a database problem occurs while loading the compressed schema
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* definitions from the database.
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* @throws InitializationException
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* If an error occurs while loading and processing the compressed
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* schema definitions.
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*/
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public JECompressedSchema(final Environment environment)
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throws DatabaseException, InitializationException
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{
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this.environment = environment;
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load();
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}
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/**
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* Closes the databases and releases any resources held by this compressed
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* schema manager.
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*/
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public void close()
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{
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try
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{
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adDatabase.sync();
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}
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catch (final Exception e)
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{
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// Ignore.
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}
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try
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{
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adDatabase.close();
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}
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catch (final Exception e)
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{
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// Ignore.
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}
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try
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{
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ocDatabase.sync();
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}
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catch (final Exception e)
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{
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// Ignore.
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}
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try
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{
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ocDatabase.close();
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}
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catch (final Exception e)
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{
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// Ignore.
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}
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adDatabase = null;
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ocDatabase = null;
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environment = null;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected void storeAttribute(final byte[] encodedAttribute,
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final String attributeName, final Collection<String> attributeOptions)
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throws DirectoryException
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{
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try
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{
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storeAttributeWriterBuffer.clear();
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storeAttributeWriter.writeStartSequence();
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storeAttributeWriter.writeOctetString(attributeName);
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for (final String option : attributeOptions)
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{
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storeAttributeWriter.writeOctetString(option);
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}
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storeAttributeWriter.writeEndSequence();
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store(adDatabase, encodedAttribute, storeAttributeWriterBuffer);
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}
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catch (final IOException e)
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{
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// TODO: Shouldn't happen but should log a message
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected void storeObjectClasses(final byte[] encodedObjectClasses,
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final Collection<String> objectClassNames) throws DirectoryException
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{
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try
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{
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storeObjectClassesWriterBuffer.clear();
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storeObjectClassesWriter.writeStartSequence();
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for (final String ocName : objectClassNames)
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{
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storeObjectClassesWriter.writeOctetString(ocName);
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}
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storeObjectClassesWriter.writeEndSequence();
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store(ocDatabase, encodedObjectClasses, storeObjectClassesWriterBuffer);
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}
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catch (final IOException e)
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{
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// TODO: Shouldn't happen but should log a message
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}
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}
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/**
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* Loads the compressed schema information from the database.
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*
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* @throws DatabaseException
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* If a database error occurs while loading the definitions from the
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* database.
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* @throws InitializationException
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* If an error occurs while loading and processing the definitions.
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*/
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private void load() throws DatabaseException, InitializationException
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{
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final DatabaseConfig dbConfig = new DatabaseConfig();
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if (environment.getConfig().getReadOnly())
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{
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dbConfig.setReadOnly(true);
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dbConfig.setAllowCreate(false);
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dbConfig.setTransactional(false);
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}
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else if (!environment.getConfig().getTransactional())
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{
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dbConfig.setAllowCreate(true);
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dbConfig.setTransactional(false);
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dbConfig.setDeferredWrite(true);
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}
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else
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{
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dbConfig.setAllowCreate(true);
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dbConfig.setTransactional(true);
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}
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adDatabase = environment.openDatabase(null, DB_NAME_AD, dbConfig);
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ocDatabase = environment.openDatabase(null, DB_NAME_OC, dbConfig);
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// Cursor through the object class database and load the object class set
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// definitions. At the same time, figure out the highest token value and
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// initialize the object class counter to one greater than that.
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final Cursor ocCursor = ocDatabase.openCursor(null, null);
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try
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{
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final DatabaseEntry keyEntry = new DatabaseEntry();
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final DatabaseEntry valueEntry = new DatabaseEntry();
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OperationStatus status = ocCursor.getFirst(keyEntry, valueEntry,
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LockMode.READ_UNCOMMITTED);
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while (status == OperationStatus.SUCCESS)
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{
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final byte[] encodedObjectClasses = keyEntry.getData();
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final ASN1Reader reader = ASN1.getReader(valueEntry.getData());
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reader.readStartSequence();
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final List<String> objectClassNames = new LinkedList<String>();
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while (reader.hasNextElement())
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{
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objectClassNames.add(reader.readOctetStringAsString());
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}
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reader.readEndSequence();
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loadObjectClasses(encodedObjectClasses, objectClassNames);
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status = ocCursor.getNext(keyEntry, valueEntry,
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LockMode.READ_UNCOMMITTED);
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}
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}
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catch (final ASN1Exception ae)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, ae);
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}
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final Message m = ERR_JEB_COMPSCHEMA_CANNOT_DECODE_OC_TOKEN.get(ae
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.getMessage());
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throw new InitializationException(m, ae);
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}
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finally
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{
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ocCursor.close();
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}
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// Cursor through the attribute description database and load the attribute
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// set definitions.
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final Cursor adCursor = adDatabase.openCursor(null, null);
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try
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{
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final DatabaseEntry keyEntry = new DatabaseEntry();
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final DatabaseEntry valueEntry = new DatabaseEntry();
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OperationStatus status = adCursor.getFirst(keyEntry, valueEntry,
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LockMode.READ_UNCOMMITTED);
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while (status == OperationStatus.SUCCESS)
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{
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final byte[] encodedAttribute = keyEntry.getData();
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final ASN1Reader reader = ASN1.getReader(valueEntry.getData());
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reader.readStartSequence();
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final String attributeName = reader.readOctetStringAsString();
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final List<String> attributeOptions = new LinkedList<String>();
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while (reader.hasNextElement())
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{
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attributeOptions.add(reader.readOctetStringAsString());
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}
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reader.readEndSequence();
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loadAttribute(encodedAttribute, attributeName, attributeOptions);
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status = adCursor.getNext(keyEntry, valueEntry,
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LockMode.READ_UNCOMMITTED);
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}
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}
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catch (final ASN1Exception ae)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, ae);
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}
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final Message m = ERR_JEB_COMPSCHEMA_CANNOT_DECODE_AD_TOKEN.get(ae
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.getMessage());
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throw new InitializationException(m, ae);
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}
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finally
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{
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adCursor.close();
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}
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}
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private void store(final Database database, final byte[] key,
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final ByteStringBuilder value) throws DirectoryException
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{
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boolean successful = false;
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final DatabaseEntry keyEntry = new DatabaseEntry(key);
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final DatabaseEntry valueEntry = new DatabaseEntry(value.getBackingArray(),
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0, value.length());
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for (int i = 0; i < 3; i++)
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{
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try
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{
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final OperationStatus status = database.putNoOverwrite(null, keyEntry,
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valueEntry);
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if (status == OperationStatus.SUCCESS)
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{
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successful = true;
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break;
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}
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else
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{
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final Message m = ERR_JEB_COMPSCHEMA_CANNOT_STORE_STATUS.get(status
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.toString());
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throw new DirectoryException(
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DirectoryServer.getServerErrorResultCode(), m);
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}
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}
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catch (final LockConflictException ce)
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{
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continue;
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}
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catch (final DatabaseException de)
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{
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final Message m = ERR_JEB_COMPSCHEMA_CANNOT_STORE_EX.get(de
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.getMessage());
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throw new DirectoryException(
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DirectoryServer.getServerErrorResultCode(), m, de);
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}
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}
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if (!successful)
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{
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final Message m = ERR_JEB_COMPSCHEMA_CANNOT_STORE_MULTIPLE_FAILURES.get();
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throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
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m);
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}
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}
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}
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