/*
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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 legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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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 legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* 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 2013-2015 ForgeRock AS.
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*/
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package org.opends.server.backends.pluggable;
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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.forgerock.i18n.LocalizableMessage;
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import org.forgerock.i18n.slf4j.LocalizedLogger;
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import org.forgerock.opendj.io.ASN1;
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import org.forgerock.opendj.io.ASN1Reader;
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import org.forgerock.opendj.io.ASN1Writer;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.ByteStringBuilder;
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import org.opends.server.api.CompressedSchema;
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import org.opends.server.backends.pluggable.spi.Cursor;
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import org.opends.server.backends.pluggable.spi.Storage;
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import org.opends.server.backends.pluggable.spi.StorageRuntimeException;
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import org.opends.server.backends.pluggable.spi.TreeName;
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import org.opends.server.backends.pluggable.spi.WriteOperation;
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import org.opends.server.backends.pluggable.spi.WriteableTransaction;
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import org.opends.server.core.DirectoryServer;
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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 static org.opends.messages.JebMessages.*;
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/**
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* This class provides a compressed schema implementation whose definitions are
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* persisted in a database.
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*/
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final class JECompressedSchema extends CompressedSchema
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{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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/** The name of the database used to store compressed attribute description definitions. */
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private static final String DB_NAME_AD = "compressed_attributes";
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/** The name of the database used to store compressed object class set definitions. */
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private static final String DB_NAME_OC = "compressed_object_classes";
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/** The compressed attribute description schema tree. */
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private static final TreeName adTreeName = new TreeName("compressed_schema", DB_NAME_AD);
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/** The compressed object class set schema tree. */
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private static final TreeName ocTreeName = new TreeName("compressed_schema", DB_NAME_OC);
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/** The environment in which the databases are held. */
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private Storage storage;
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private final ByteStringBuilder storeAttributeWriterBuffer = new ByteStringBuilder();
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private final ASN1Writer storeAttributeWriter = ASN1.getWriter(storeAttributeWriterBuffer);
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private final ByteStringBuilder storeObjectClassesWriterBuffer = new ByteStringBuilder();
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private final ASN1Writer storeObjectClassesWriter = ASN1.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 storage
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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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* @param txn a non null database transaction
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* @throws StorageRuntimeException
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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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JECompressedSchema(final Storage storage, WriteableTransaction txn)
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throws StorageRuntimeException, InitializationException
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{
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this.storage = storage;
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load(txn);
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}
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/** {@inheritDoc} */
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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(adTreeName, 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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/** {@inheritDoc} */
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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(ocTreeName, 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 StorageRuntimeException
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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(WriteableTransaction txn) throws StorageRuntimeException, InitializationException
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{
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txn.openTree(adTreeName);
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txn.openTree(ocTreeName);
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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 = txn.openCursor(ocTreeName);
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try
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{
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while (ocCursor.next())
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{
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final byte[] encodedObjectClasses = ocCursor.getKey().toByteArray();
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final ASN1Reader reader = ASN1.getReader(ocCursor.getValue());
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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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}
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}
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catch (final IOException e)
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{
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logger.traceException(e);
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throw new InitializationException(
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ERR_JEB_COMPSCHEMA_CANNOT_DECODE_OC_TOKEN.get(e.getMessage()), e);
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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 = txn.openCursor(adTreeName);
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try
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{
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while (adCursor.next())
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{
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final byte[] encodedAttribute = adCursor.getKey().toByteArray();
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final ASN1Reader reader = ASN1.getReader(adCursor.getValue());
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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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}
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}
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catch (final IOException e)
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{
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logger.traceException(e);
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throw new InitializationException(
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ERR_JEB_COMPSCHEMA_CANNOT_DECODE_AD_TOKEN.get(e.getMessage()), e);
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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 boolean store(final TreeName treeName, final byte[] key, final ByteStringBuilder value)
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throws DirectoryException
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{
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final ByteString keyEntry = ByteString.wrap(key);
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try
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{
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storage.write(new WriteOperation()
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{
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@Override
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public void run(WriteableTransaction txn) throws Exception
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{
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txn.put(treeName, keyEntry, value);
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}
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});
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return true;
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}
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catch (final Exception e)
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{
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final LocalizableMessage m = ERR_JEB_COMPSCHEMA_CANNOT_STORE_EX.get(e.getMessage());
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throw new DirectoryException(DirectoryServer.getServerErrorResultCode(), m, e);
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}
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}
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}
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