/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.backends.pdb;
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import static com.persistit.Transaction.CommitPolicy.*;
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import static java.util.Arrays.*;
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import static org.opends.messages.BackendMessages.*;
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import static org.opends.messages.UtilityMessages.*;
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import static org.opends.server.backends.pluggable.spi.StorageUtils.*;
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import static org.opends.server.util.StaticUtils.*;
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import java.io.Closeable;
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import java.io.File;
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import java.io.FileFilter;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.rmi.RemoteException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.ListIterator;
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import java.util.Map;
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import java.util.NoSuchElementException;
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import java.util.Objects;
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import java.util.Set;
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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.config.server.ConfigChangeResult;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.forgerock.opendj.config.server.ConfigurationChangeListener;
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import org.forgerock.opendj.ldap.ByteSequence;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.server.config.server.PDBBackendCfg;
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import org.forgerock.util.Reject;
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import org.opends.server.api.Backupable;
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import org.opends.server.api.DiskSpaceMonitorHandler;
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import org.opends.server.backends.pluggable.spi.AccessMode;
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import org.opends.server.backends.pluggable.spi.Cursor;
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import org.opends.server.backends.pluggable.spi.Importer;
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import org.opends.server.backends.pluggable.spi.ReadOnlyStorageException;
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import org.opends.server.backends.pluggable.spi.ReadOperation;
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import org.opends.server.backends.pluggable.spi.SequentialCursor;
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import org.opends.server.backends.pluggable.spi.Storage;
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import org.opends.server.backends.pluggable.spi.StorageInUseException;
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import org.opends.server.backends.pluggable.spi.StorageRuntimeException;
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import org.opends.server.backends.pluggable.spi.StorageStatus;
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import org.opends.server.backends.pluggable.spi.StorageUtils;
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import org.opends.server.backends.pluggable.spi.TreeName;
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import org.opends.server.backends.pluggable.spi.UpdateFunction;
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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.core.MemoryQuota;
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import org.opends.server.core.ServerContext;
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import org.opends.server.extensions.DiskSpaceMonitor;
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import org.opends.server.types.BackupConfig;
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import org.opends.server.types.BackupDirectory;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.RestoreConfig;
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import org.opends.server.util.BackupManager;
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import com.persistit.Configuration;
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import com.persistit.Configuration.BufferPoolConfiguration;
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import com.persistit.Exchange;
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import com.persistit.Key;
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import com.persistit.Persistit;
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import com.persistit.Transaction;
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import com.persistit.Transaction.CommitPolicy;
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import com.persistit.Value;
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import com.persistit.Volume;
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import com.persistit.VolumeSpecification;
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import com.persistit.exception.InUseException;
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import com.persistit.exception.PersistitException;
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import com.persistit.exception.RollbackException;
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import com.persistit.exception.TreeNotFoundException;
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/** PersistIt database implementation of the {@link Storage} engine. */
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public final class PDBStorage implements Storage, Backupable, ConfigurationChangeListener<PDBBackendCfg>,
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DiskSpaceMonitorHandler
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{
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private static final int IMPORT_DB_CACHE_SIZE = 32 * MB;
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private static final double MAX_SLEEP_ON_RETRY_MS = 50.0;
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private static final String VOLUME_NAME = "dj";
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private static final String JOURNAL_NAME = VOLUME_NAME + "_journal";
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/** The buffer / page size used by the PersistIt storage. */
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private static final int BUFFER_SIZE = 16 * 1024;
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/** PersistIt implementation of the {@link Cursor} interface. */
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private final class CursorImpl implements Cursor<ByteString, ByteString>
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{
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private ByteString currentKey;
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private ByteString currentValue;
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private final Exchange exchange;
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private CursorImpl(final Exchange exchange)
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{
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this.exchange = exchange;
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}
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@Override
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public void close()
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{
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// Release immediately because this exchange did not come from the txn cache
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releaseExchange(exchange);
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}
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@Override
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public boolean isDefined()
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{
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return exchange.getValue().isDefined();
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}
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@Override
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public ByteString getKey()
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{
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if (currentKey == null)
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{
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throwIfUndefined();
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currentKey = ByteString.wrap(exchange.getKey().reset().decodeByteArray());
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}
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return currentKey;
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}
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@Override
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public ByteString getValue()
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{
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if (currentValue == null)
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{
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throwIfUndefined();
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currentValue = ByteString.wrap(exchange.getValue().getByteArray());
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}
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return currentValue;
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}
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@Override
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public boolean next()
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{
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clearCurrentKeyAndValue();
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try
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{
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return exchange.next();
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public void delete()
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{
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throwIfUndefined();
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try
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{
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exchange.remove();
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean positionToKey(final ByteSequence key)
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{
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clearCurrentKeyAndValue();
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bytesToKey(exchange.getKey(), key);
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try
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{
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exchange.fetch();
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return exchange.getValue().isDefined();
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean positionToKeyOrNext(final ByteSequence key)
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{
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clearCurrentKeyAndValue();
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bytesToKey(exchange.getKey(), key);
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try
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{
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exchange.fetch();
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return exchange.getValue().isDefined() || exchange.next();
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean positionToIndex(int index)
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{
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// There doesn't seem to be a way to optimize this using Persistit.
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clearCurrentKeyAndValue();
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exchange.getKey().to(Key.BEFORE);
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try
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{
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for (int i = 0; i <= index; i++)
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{
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if (!exchange.next())
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{
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return false;
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}
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}
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return true;
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean positionToLastKey()
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{
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clearCurrentKeyAndValue();
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exchange.getKey().to(Key.AFTER);
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try
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{
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return exchange.previous();
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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private void clearCurrentKeyAndValue()
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{
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currentKey = null;
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currentValue = null;
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}
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private void throwIfUndefined()
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{
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if (!isDefined())
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{
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throw new NoSuchElementException();
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}
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}
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}
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/** PersistIt implementation of the {@link Importer} interface. */
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private final class ImporterImpl implements Importer
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{
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private final ThreadLocal<Map<TreeName, Exchange>> exchanges = new ThreadLocal<Map<TreeName, Exchange>>()
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{
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@Override
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protected Map<TreeName, Exchange> initialValue()
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{
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return new HashMap<>();
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}
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};
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@Override
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public void close()
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{
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PDBStorage.this.close();
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}
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@Override
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public void clearTree(final TreeName treeName)
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{
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final Transaction txn = db.getTransaction();
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deleteTree(txn, treeName);
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createTree(txn, treeName);
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}
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private void createTree(final Transaction txn, final TreeName treeName)
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{
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try
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{
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txn.begin();
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getNewExchange(treeName, true);
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txn.commit(commitPolicy);
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}
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catch (PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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finally
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{
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txn.end();
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}
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}
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private void deleteTree(Transaction txn, final TreeName treeName)
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{
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Exchange ex = null;
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try
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{
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txn.begin();
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ex = getNewExchange(treeName, true);
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ex.removeTree();
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txn.commit(commitPolicy);
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}
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catch (PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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finally
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{
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txn.end();
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}
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}
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@Override
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public void put(final TreeName treeName, final ByteSequence key, final ByteSequence value)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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bytesToValue(ex.getValue(), value);
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ex.store();
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}
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catch (final Exception e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public ByteString read(final TreeName treeName, final ByteSequence key)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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ex.fetch();
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return valueToBytes(ex.getValue());
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}
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catch (final PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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private Exchange getExchangeFromCache(final TreeName treeName) throws PersistitException
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{
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Map<TreeName, Exchange> threadExchanges = exchanges.get();
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Exchange exchange = threadExchanges.get(treeName);
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if (exchange == null)
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{
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exchange = getNewExchange(treeName, false);
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threadExchanges.put(treeName, exchange);
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}
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return exchange;
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}
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@Override
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public SequentialCursor<ByteString, ByteString> openCursor(TreeName treeName)
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{
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try
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{
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return new CursorImpl(getNewExchange(treeName, false));
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}
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catch (PersistitException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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}
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/** Common interface for internal WriteableTransaction implementations. */
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private interface StorageImpl extends WriteableTransaction, Closeable {
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}
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/** PersistIt implementation of the {@link WriteableTransaction} interface. */
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private final class WriteableStorageImpl implements StorageImpl
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{
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private static final String DUMMY_RECORD = "_DUMMY_RECORD_";
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private final Map<TreeName, Exchange> exchanges = new HashMap<>();
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@Override
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public void put(final TreeName treeName, final ByteSequence key, final ByteSequence value)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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bytesToValue(ex.getValue(), value);
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ex.store();
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean delete(final TreeName treeName, final ByteSequence key)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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return ex.remove();
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public void deleteTree(final TreeName treeName)
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{
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Exchange ex = null;
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try
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{
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ex = getExchangeFromCache(treeName);
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ex.removeTree();
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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finally
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{
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exchanges.values().remove(ex);
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releaseExchange(ex);
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}
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}
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@Override
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public long getRecordCount(TreeName treeName)
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{
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// FIXME: is there a better/quicker way to do this?
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try(final Cursor<?, ?> cursor = openCursor(treeName))
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{
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long count = 0;
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while (cursor.next())
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{
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count++;
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}
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return count;
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}
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}
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@Override
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public Cursor<ByteString, ByteString> openCursor(final TreeName treeName)
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{
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try
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{
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/*
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* Acquire a new exchange for the cursor rather than using a cached
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* exchange in order to avoid reentrant accesses to the same tree
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* interfering with the cursor position.
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*/
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return new CursorImpl(getNewExchange(treeName, false));
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public void openTree(final TreeName treeName, boolean createOnDemand)
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{
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if (createOnDemand)
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{
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openCreateTree(treeName);
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}
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else
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{
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try
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{
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getExchangeFromCache(treeName);
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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}
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@Override
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public ByteString read(final TreeName treeName, final ByteSequence key)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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ex.fetch();
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return valueToBytes(ex.getValue());
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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@Override
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public boolean update(final TreeName treeName, final ByteSequence key, final UpdateFunction f)
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{
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try
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{
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final Exchange ex = getExchangeFromCache(treeName);
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bytesToKey(ex.getKey(), key);
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ex.fetch();
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final ByteSequence oldValue = valueToBytes(ex.getValue());
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final ByteSequence newValue = f.computeNewValue(oldValue);
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if (!Objects.equals(newValue, oldValue))
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{
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if (newValue == null)
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{
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ex.remove();
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}
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else
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{
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ex.getValue().clear().putByteArray(newValue.toByteArray());
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ex.store();
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}
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return true;
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}
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return false;
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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}
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private void openCreateTree(final TreeName treeName)
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{
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Exchange ex = null;
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try
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{
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ex = getNewExchange(treeName, true);
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// Work around a problem with forced shutdown right after tree creation.
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// Tree operations are not part of the journal, so force a couple operations to be able to recover.
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ByteString dummyKey = ByteString.valueOfUtf8(DUMMY_RECORD);
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put(treeName, dummyKey, ByteString.empty());
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delete(treeName, dummyKey);
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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finally
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{
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releaseExchange(ex);
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}
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}
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private Exchange getExchangeFromCache(final TreeName treeName) throws PersistitException
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{
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Exchange exchange = exchanges.get(treeName);
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if (exchange == null)
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{
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exchange = getNewExchange(treeName, false);
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exchanges.put(treeName, exchange);
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}
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return exchange;
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}
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@Override
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public void close()
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{
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for (final Exchange ex : exchanges.values())
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{
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releaseExchange(ex);
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}
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exchanges.clear();
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}
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}
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/** PersistIt read-only implementation of {@link StorageImpl} interface. */
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private final class ReadOnlyStorageImpl implements StorageImpl {
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private final WriteableStorageImpl delegate;
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ReadOnlyStorageImpl(WriteableStorageImpl delegate)
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{
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this.delegate = delegate;
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}
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@Override
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public ByteString read(TreeName treeName, ByteSequence key)
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{
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return delegate.read(treeName, key);
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}
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@Override
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public Cursor<ByteString, ByteString> openCursor(TreeName treeName)
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{
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return delegate.openCursor(treeName);
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}
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@Override
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public long getRecordCount(TreeName treeName)
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{
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return delegate.getRecordCount(treeName);
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}
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@Override
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public void openTree(TreeName treeName, boolean createOnDemand)
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{
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if (createOnDemand)
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{
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throw new ReadOnlyStorageException();
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}
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Exchange ex = null;
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try
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{
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ex = getNewExchange(treeName, false);
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}
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catch (final TreeNotFoundException e)
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{
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// ignore missing trees.
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}
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catch (final PersistitException | RollbackException e)
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{
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throw new StorageRuntimeException(e);
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}
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finally
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{
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releaseExchange(ex);
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}
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}
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@Override
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public void close()
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{
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delegate.close();
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}
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@Override
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public void deleteTree(TreeName name)
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{
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throw new ReadOnlyStorageException();
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}
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@Override
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public void put(TreeName treeName, ByteSequence key, ByteSequence value)
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{
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throw new ReadOnlyStorageException();
|
}
|
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@Override
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public boolean update(TreeName treeName, ByteSequence key, UpdateFunction f)
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{
|
throw new ReadOnlyStorageException();
|
}
|
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@Override
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public boolean delete(TreeName treeName, ByteSequence key)
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{
|
throw new ReadOnlyStorageException();
|
}
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}
|
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Exchange getNewExchange(final TreeName treeName, final boolean create) throws PersistitException
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{
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final Exchange ex = db.getExchange(volume, treeName.toString(), create);
|
ex.setMaximumValueSize(Value.MAXIMUM_SIZE);
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return ex;
|
}
|
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void releaseExchange(Exchange ex)
|
{
|
// Don't keep exchanges with enlarged value - let them be GC'd.
|
// This is also done internally by Persistit in TransactionPlayer line 197.
|
if (ex.getValue().getEncodedBytes().length < Value.DEFAULT_MAXIMUM_SIZE)
|
{
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db.releaseExchange(ex);
|
}
|
}
|
|
private StorageImpl newStorageImpl() {
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final WriteableStorageImpl writeableStorage = new WriteableStorageImpl();
|
return accessMode.isWriteable() ? writeableStorage : new ReadOnlyStorageImpl(writeableStorage);
|
}
|
|
private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
|
|
private final ServerContext serverContext;
|
private final File backendDirectory;
|
private CommitPolicy commitPolicy;
|
private AccessMode accessMode;
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private Persistit db;
|
private Volume volume;
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private PDBBackendCfg config;
|
private DiskSpaceMonitor diskMonitor;
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private PDBMonitor monitor;
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private MemoryQuota memQuota;
|
private StorageStatus storageStatus = StorageStatus.working();
|
|
/**
|
* Creates a new persistit storage with the provided configuration.
|
*
|
* @param cfg
|
* The configuration.
|
* @param serverContext
|
* This server instance context
|
* @throws ConfigException if memory cannot be reserved
|
*/
|
// FIXME: should be package private once importer is decoupled.
|
public PDBStorage(final PDBBackendCfg cfg, ServerContext serverContext) throws ConfigException
|
{
|
this.serverContext = serverContext;
|
backendDirectory = getBackendDirectory(cfg);
|
config = cfg;
|
cfg.addPDBChangeListener(this);
|
}
|
|
private Configuration buildImportConfiguration()
|
{
|
final Configuration dbCfg = buildConfiguration(AccessMode.READ_WRITE);
|
getBufferPoolCfg(dbCfg).setMaximumMemory(IMPORT_DB_CACHE_SIZE);
|
commitPolicy = SOFT;
|
return dbCfg;
|
}
|
|
private Configuration buildConfiguration(AccessMode accessMode)
|
{
|
this.accessMode = accessMode;
|
|
final Configuration dbCfg = new Configuration();
|
dbCfg.setLogFile(new File(backendDirectory, VOLUME_NAME + ".log").getPath());
|
dbCfg.setJournalPath(new File(backendDirectory, JOURNAL_NAME).getPath());
|
dbCfg.setCheckpointInterval(config.getDBCheckpointerWakeupInterval());
|
// Volume is opened read write because recovery will fail if opened read-only
|
dbCfg.setVolumeList(asList(new VolumeSpecification(new File(backendDirectory, VOLUME_NAME).getPath(), null,
|
BUFFER_SIZE, 4096, Long.MAX_VALUE / BUFFER_SIZE, 2048, true, false, false)));
|
final BufferPoolConfiguration bufferPoolCfg = getBufferPoolCfg(dbCfg);
|
bufferPoolCfg.setMaximumCount(Integer.MAX_VALUE);
|
|
diskMonitor = serverContext.getDiskSpaceMonitor();
|
memQuota = serverContext.getMemoryQuota();
|
if (config.getDBCacheSize() > 0)
|
{
|
bufferPoolCfg.setMaximumMemory(config.getDBCacheSize());
|
memQuota.acquireMemory(config.getDBCacheSize());
|
}
|
else
|
{
|
bufferPoolCfg.setMaximumMemory(memQuota.memPercentToBytes(config.getDBCachePercent()));
|
memQuota.acquireMemory(memQuota.memPercentToBytes(config.getDBCachePercent()));
|
}
|
commitPolicy = config.isDBTxnNoSync() ? SOFT : GROUP;
|
dbCfg.setJmxEnabled(false);
|
return dbCfg;
|
}
|
|
@Override
|
public void close()
|
{
|
if (db != null)
|
{
|
DirectoryServer.deregisterMonitorProvider(monitor);
|
monitor = null;
|
try
|
{
|
db.close();
|
db = null;
|
}
|
catch (final PersistitException e)
|
{
|
throw new IllegalStateException(e);
|
}
|
}
|
if (config.getDBCacheSize() > 0)
|
{
|
memQuota.releaseMemory(config.getDBCacheSize());
|
}
|
else
|
{
|
memQuota.releaseMemory(memQuota.memPercentToBytes(config.getDBCachePercent()));
|
}
|
config.removePDBChangeListener(this);
|
diskMonitor.deregisterMonitoredDirectory(getDirectory(), this);
|
}
|
|
private static BufferPoolConfiguration getBufferPoolCfg(Configuration dbCfg)
|
{
|
return dbCfg.getBufferPoolMap().get(BUFFER_SIZE);
|
}
|
|
@Override
|
public void open(AccessMode accessMode) throws ConfigException, StorageRuntimeException
|
{
|
Reject.ifNull(accessMode, "accessMode must not be null");
|
open0(buildConfiguration(accessMode));
|
}
|
|
private void open0(final Configuration dbCfg) throws ConfigException
|
{
|
setupStorageFiles(backendDirectory, config.getDBDirectoryPermissions(), config.dn());
|
try
|
{
|
if (db != null)
|
{
|
throw new IllegalStateException(
|
"Database is already open, either the backend is enabled or an import is currently running.");
|
}
|
db = new Persistit(dbCfg);
|
|
final long bufferCount = getBufferPoolCfg(dbCfg).computeBufferCount(db.getAvailableHeap());
|
final long totalSize = bufferCount * BUFFER_SIZE / 1024;
|
logger.info(NOTE_PDB_MEMORY_CFG, config.getBackendId(), bufferCount, BUFFER_SIZE, totalSize);
|
|
db.initialize();
|
volume = db.loadVolume(VOLUME_NAME);
|
monitor = new PDBMonitor(config.getBackendId() + " PDB Database", db);
|
DirectoryServer.registerMonitorProvider(monitor);
|
}
|
catch(final InUseException e) {
|
throw new StorageInUseException(e);
|
}
|
catch (final PersistitException | RollbackException e)
|
{
|
throw new StorageRuntimeException(e);
|
}
|
registerMonitoredDirectory(config);
|
}
|
|
@Override
|
public <T> T read(final ReadOperation<T> operation) throws Exception
|
{
|
// This check may be unnecessary for PDB, but it will help us detect bad business logic
|
// in the pluggable backend that would cause problems for JE.
|
final Transaction txn = db.getTransaction();
|
for (;;)
|
{
|
txn.begin();
|
try
|
{
|
try (final StorageImpl storageImpl = newStorageImpl())
|
{
|
final T result = operation.run(storageImpl);
|
txn.commit(commitPolicy);
|
return result;
|
}
|
catch (final StorageRuntimeException e)
|
{
|
if (e.getCause() != null)
|
{
|
throw (Exception) e.getCause();
|
}
|
throw e;
|
}
|
}
|
catch (final RollbackException e)
|
{
|
// retry
|
}
|
catch (final Exception e)
|
{
|
txn.rollback();
|
throw e;
|
}
|
finally
|
{
|
txn.end();
|
}
|
}
|
}
|
|
@Override
|
public Importer startImport() throws ConfigException, StorageRuntimeException
|
{
|
open0(buildImportConfiguration());
|
return new ImporterImpl();
|
}
|
|
@Override
|
public void write(final WriteOperation operation) throws Exception
|
{
|
final Transaction txn = db.getTransaction();
|
for (;;)
|
{
|
txn.begin();
|
try
|
{
|
try (final StorageImpl storageImpl = newStorageImpl())
|
{
|
operation.run(storageImpl);
|
txn.commit(commitPolicy);
|
return;
|
}
|
catch (final StorageRuntimeException e)
|
{
|
if (e.getCause() != null)
|
{
|
throw (Exception) e.getCause();
|
}
|
throw e;
|
}
|
}
|
catch (final RollbackException e)
|
{
|
// retry after random sleep (reduces transactions collision. Drawback: increased latency)
|
Thread.sleep((long) (Math.random() * MAX_SLEEP_ON_RETRY_MS));
|
}
|
catch (final Exception e)
|
{
|
txn.rollback();
|
throw e;
|
}
|
finally
|
{
|
txn.end();
|
}
|
}
|
}
|
|
@Override
|
public boolean supportsBackupAndRestore()
|
{
|
return true;
|
}
|
|
@Override
|
public File getDirectory()
|
{
|
return getBackendDirectory(config);
|
}
|
|
private static File getBackendDirectory(PDBBackendCfg cfg)
|
{
|
return getDBDirectory(cfg.getDBDirectory(), cfg.getBackendId());
|
}
|
|
@Override
|
public ListIterator<Path> getFilesToBackup() throws DirectoryException
|
{
|
try
|
{
|
if (db == null)
|
{
|
return getFilesToBackupWhenOffline();
|
}
|
|
// FIXME: use full programmatic way of retrieving backup file once available in persistIt
|
// When requesting files to backup, append only mode must also be set (-a) otherwise it will be ended
|
// by PersistIt and performing backup may corrupt the DB.
|
String filesAsString = db.getManagement().execute("backup -a -f");
|
String[] allFiles = filesAsString.split("[\r\n]+");
|
final List<Path> files = new ArrayList<>();
|
for (String file : allFiles)
|
{
|
files.add(Paths.get(file));
|
}
|
return files.listIterator();
|
}
|
catch (Exception e)
|
{
|
throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
|
ERR_BACKEND_LIST_FILES_TO_BACKUP.get(config.getBackendId(), stackTraceToSingleLineString(e)));
|
}
|
}
|
|
/** Filter to retrieve the database files to backup. */
|
private static final FileFilter BACKUP_FILES_FILTER = new FileFilter()
|
{
|
@Override
|
public boolean accept(File file)
|
{
|
String name = file.getName();
|
return VOLUME_NAME.equals(name) || name.matches(JOURNAL_NAME + "\\.\\d+$");
|
}
|
};
|
|
/**
|
* Returns the list of files to backup when there is no open database.
|
* <p>
|
* It is not possible to rely on the database returning the files, so the files must be retrieved
|
* from a file filter.
|
*/
|
private ListIterator<Path> getFilesToBackupWhenOffline() throws DirectoryException
|
{
|
return BackupManager.getFiles(getDirectory(), BACKUP_FILES_FILTER, config.getBackendId()).listIterator();
|
}
|
|
@Override
|
public Path beforeRestore() throws DirectoryException
|
{
|
return null;
|
}
|
|
@Override
|
public boolean isDirectRestore()
|
{
|
// restore is done in an intermediate directory
|
return false;
|
}
|
|
@Override
|
public void afterRestore(Path restoreDirectory, Path saveDirectory) throws DirectoryException
|
{
|
// intermediate directory content is moved to database directory
|
File targetDirectory = getDirectory();
|
recursiveDelete(targetDirectory);
|
try
|
{
|
Files.move(restoreDirectory, targetDirectory.toPath());
|
}
|
catch(IOException e)
|
{
|
LocalizableMessage msg = ERR_CANNOT_RENAME_RESTORE_DIRECTORY.get(restoreDirectory, targetDirectory.getPath());
|
throw new DirectoryException(DirectoryServer.getServerErrorResultCode(), msg);
|
}
|
}
|
|
/**
|
* Switch the database in append only mode.
|
* <p>
|
* This is a mandatory operation before performing a backup.
|
*/
|
private void switchToAppendOnlyMode() throws DirectoryException
|
{
|
try
|
{
|
// FIXME: use full programmatic way of switching to this mode once available in persistIt
|
db.getManagement().execute("backup -a -c");
|
}
|
catch (RemoteException e)
|
{
|
throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
|
ERR_BACKEND_SWITCH_TO_APPEND_MODE.get(config.getBackendId(), stackTraceToSingleLineString(e)));
|
}
|
}
|
|
/**
|
* Terminate the append only mode of the database.
|
* <p>
|
* This should be called only when database was previously switched to append only mode.
|
*/
|
private void endAppendOnlyMode() throws DirectoryException
|
{
|
try
|
{
|
// FIXME: use full programmatic way of ending append mode once available in persistIt
|
db.getManagement().execute("backup -e");
|
}
|
catch (RemoteException e)
|
{
|
throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
|
ERR_BACKEND_END_APPEND_MODE.get(config.getBackendId(), stackTraceToSingleLineString(e)));
|
}
|
}
|
|
@Override
|
public void createBackup(BackupConfig backupConfig) throws DirectoryException
|
{
|
if (db != null)
|
{
|
switchToAppendOnlyMode();
|
}
|
try
|
{
|
new BackupManager(config.getBackendId()).createBackup(this, backupConfig);
|
}
|
finally
|
{
|
if (db != null)
|
{
|
endAppendOnlyMode();
|
}
|
}
|
}
|
|
@Override
|
public void removeBackup(BackupDirectory backupDirectory, String backupID) throws DirectoryException
|
{
|
new BackupManager(config.getBackendId()).removeBackup(backupDirectory, backupID);
|
}
|
|
@Override
|
public void restoreBackup(RestoreConfig restoreConfig) throws DirectoryException
|
{
|
new BackupManager(config.getBackendId()).restoreBackup(this, restoreConfig);
|
}
|
|
@Override
|
public Set<TreeName> listTrees()
|
{
|
try
|
{
|
String[] treeNames = volume.getTreeNames();
|
final Set<TreeName> results = new HashSet<>(treeNames.length);
|
for (String treeName : treeNames)
|
{
|
if (!treeName.equals("_classIndex"))
|
{
|
results.add(TreeName.valueOf(treeName));
|
}
|
}
|
return results;
|
}
|
catch (PersistitException e)
|
{
|
throw new StorageRuntimeException(e);
|
}
|
}
|
|
/**
|
* TODO: it would be nice to use the low-level key/value APIs. They seem quite
|
* inefficient at the moment for simple byte arrays.
|
*/
|
private static Key bytesToKey(final Key key, final ByteSequence bytes)
|
{
|
final byte[] tmp = bytes.toByteArray();
|
return key.clear().appendByteArray(tmp, 0, tmp.length);
|
}
|
|
private static Value bytesToValue(final Value value, final ByteSequence bytes)
|
{
|
value.clear().putByteArray(bytes.toByteArray());
|
return value;
|
}
|
|
private static ByteString valueToBytes(final Value value)
|
{
|
if (value.isDefined())
|
{
|
return ByteString.wrap(value.getByteArray());
|
}
|
return null;
|
}
|
|
@Override
|
public boolean isConfigurationChangeAcceptable(PDBBackendCfg newCfg,
|
List<LocalizableMessage> unacceptableReasons)
|
{
|
long newSize = computeSize(newCfg);
|
long oldSize = computeSize(config);
|
return (newSize <= oldSize || memQuota.isMemoryAvailable(newSize - oldSize))
|
&& checkConfigurationDirectories(newCfg, unacceptableReasons);
|
}
|
|
private long computeSize(PDBBackendCfg cfg)
|
{
|
return cfg.getDBCacheSize() > 0 ? cfg.getDBCacheSize() : memQuota.memPercentToBytes(cfg.getDBCachePercent());
|
}
|
|
/**
|
* Checks newly created backend has a valid configuration.
|
* @param cfg the new configuration
|
* @param unacceptableReasons the list of accumulated errors and their messages
|
* @param context the server context
|
* @return true if newly created backend has a valid configuration
|
*/
|
static boolean isConfigurationAcceptable(PDBBackendCfg cfg, List<LocalizableMessage> unacceptableReasons,
|
ServerContext context)
|
{
|
if (context != null)
|
{
|
MemoryQuota memQuota = context.getMemoryQuota();
|
if (cfg.getDBCacheSize() > 0 && !memQuota.isMemoryAvailable(cfg.getDBCacheSize()))
|
{
|
unacceptableReasons.add(ERR_BACKEND_CONFIG_CACHE_SIZE_GREATER_THAN_JVM_HEAP.get(
|
cfg.getDBCacheSize(), memQuota.getAvailableMemory()));
|
return false;
|
}
|
else if (!memQuota.isMemoryAvailable(memQuota.memPercentToBytes(cfg.getDBCachePercent())))
|
{
|
unacceptableReasons.add(ERR_BACKEND_CONFIG_CACHE_PERCENT_GREATER_THAN_JVM_HEAP.get(
|
cfg.getDBCachePercent(), memQuota.memBytesToPercent(memQuota.getAvailableMemory())));
|
return false;
|
}
|
}
|
return checkConfigurationDirectories(cfg, unacceptableReasons);
|
}
|
|
private static boolean checkConfigurationDirectories(PDBBackendCfg cfg,
|
List<LocalizableMessage> unacceptableReasons)
|
{
|
final ConfigChangeResult ccr = new ConfigChangeResult();
|
File newBackendDirectory = getBackendDirectory(cfg);
|
|
checkDBDirExistsOrCanCreate(newBackendDirectory, ccr, true);
|
checkDBDirPermissions(cfg.getDBDirectoryPermissions(), cfg.dn(), ccr);
|
if (!ccr.getMessages().isEmpty())
|
{
|
unacceptableReasons.addAll(ccr.getMessages());
|
return false;
|
}
|
return true;
|
}
|
|
@Override
|
public ConfigChangeResult applyConfigurationChange(PDBBackendCfg cfg)
|
{
|
final ConfigChangeResult ccr = new ConfigChangeResult();
|
|
try
|
{
|
File newBackendDirectory = getBackendDirectory(cfg);
|
|
// Create the directory if it doesn't exist.
|
if(!cfg.getDBDirectory().equals(config.getDBDirectory()))
|
{
|
checkDBDirExistsOrCanCreate(newBackendDirectory, ccr, false);
|
if (!ccr.getMessages().isEmpty())
|
{
|
return ccr;
|
}
|
|
ccr.setAdminActionRequired(true);
|
ccr.addMessage(NOTE_CONFIG_DB_DIR_REQUIRES_RESTART.get(config.getDBDirectory(), cfg.getDBDirectory()));
|
}
|
|
if (!cfg.getDBDirectoryPermissions().equalsIgnoreCase(config.getDBDirectoryPermissions())
|
|| !cfg.getDBDirectory().equals(config.getDBDirectory()))
|
{
|
checkDBDirPermissions(cfg.getDBDirectoryPermissions(), cfg.dn(), ccr);
|
if (!ccr.getMessages().isEmpty())
|
{
|
return ccr;
|
}
|
|
setDBDirPermissions(newBackendDirectory, cfg.getDBDirectoryPermissions(), cfg.dn(), ccr);
|
if (!ccr.getMessages().isEmpty())
|
{
|
return ccr;
|
}
|
}
|
registerMonitoredDirectory(cfg);
|
config = cfg;
|
commitPolicy = config.isDBTxnNoSync() ? SOFT : GROUP;
|
}
|
catch (Exception e)
|
{
|
addErrorMessage(ccr, LocalizableMessage.raw(stackTraceToSingleLineString(e)));
|
}
|
return ccr;
|
}
|
|
private void registerMonitoredDirectory(PDBBackendCfg cfg)
|
{
|
diskMonitor.registerMonitoredDirectory(
|
cfg.getBackendId() + " backend",
|
getDirectory(),
|
cfg.getDiskLowThreshold(),
|
cfg.getDiskFullThreshold(),
|
this);
|
}
|
|
@Override
|
public void removeStorageFiles() throws StorageRuntimeException
|
{
|
StorageUtils.removeStorageFiles(backendDirectory);
|
}
|
|
@Override
|
public StorageStatus getStorageStatus()
|
{
|
return storageStatus;
|
}
|
|
@Override
|
public void diskFullThresholdReached(File directory, long thresholdInBytes) {
|
storageStatus = statusWhenDiskSpaceFull(directory, thresholdInBytes, config.getBackendId());
|
}
|
|
@Override
|
public void diskLowThresholdReached(File directory, long thresholdInBytes) {
|
storageStatus = statusWhenDiskSpaceLow(directory, thresholdInBytes, config.getBackendId());
|
}
|
|
@Override
|
public void diskSpaceRestored(File directory, long lowThresholdInBytes, long fullThresholdInBytes) {
|
storageStatus = StorageStatus.working();
|
}
|
}
|
