| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.ozone.recon.recovery; |
| |
| import static org.apache.hadoop.ozone.recon.ReconConstants.RECON_OM_SNAPSHOT_DB; |
| import static org.apache.hadoop.ozone.recon.ReconServerConfigKeys.OZONE_RECON_OM_SNAPSHOT_DB_DIR; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import javax.inject.Inject; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.apache.hadoop.hdds.conf.OzoneConfiguration; |
| import org.apache.hadoop.ozone.om.OmMetadataManagerImpl; |
| import org.apache.hadoop.hdds.utils.db.DBStore; |
| import org.apache.hadoop.hdds.utils.db.DBStoreBuilder; |
| import org.apache.hadoop.ozone.recon.ReconUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Recon's implementation of the OM Metadata manager. By extending and |
| * relying on the OmMetadataManagerImpl, we can make sure all changes made to |
| * schema in OM will be automatically picked up by Recon. |
| */ |
| public class ReconOmMetadataManagerImpl extends OmMetadataManagerImpl |
| implements ReconOMMetadataManager { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ReconOmMetadataManagerImpl.class); |
| |
| private OzoneConfiguration ozoneConfiguration; |
| private ReconUtils reconUtils; |
| |
| @Inject |
| public ReconOmMetadataManagerImpl(OzoneConfiguration configuration, |
| ReconUtils reconUtils) { |
| this.reconUtils = reconUtils; |
| this.ozoneConfiguration = configuration; |
| } |
| |
| @Override |
| public void start(OzoneConfiguration configuration) throws IOException { |
| LOG.info("Starting ReconOMMetadataManagerImpl"); |
| File reconDbDir = |
| reconUtils.getReconDbDir(configuration, OZONE_RECON_OM_SNAPSHOT_DB_DIR); |
| File lastKnownOMSnapshot = |
| reconUtils.getLastKnownDB(reconDbDir, RECON_OM_SNAPSHOT_DB); |
| if (lastKnownOMSnapshot != null) { |
| LOG.info("Last known snapshot for OM : {}", |
| lastKnownOMSnapshot.getAbsolutePath()); |
| initializeNewRdbStore(lastKnownOMSnapshot); |
| } |
| } |
| |
| /** |
| * Replace existing DB instance with new one. |
| * |
| * @param dbFile new DB file location. |
| */ |
| private void initializeNewRdbStore(File dbFile) throws IOException { |
| try { |
| DBStoreBuilder dbStoreBuilder = |
| DBStoreBuilder.newBuilder(ozoneConfiguration) |
| .setName(dbFile.getName()) |
| .setPath(dbFile.toPath().getParent()); |
| addOMTablesAndCodecs(dbStoreBuilder); |
| DBStore newStore = dbStoreBuilder.build(); |
| setStore(newStore); |
| LOG.info("Created OM DB snapshot at {}.", |
| dbFile.getAbsolutePath()); |
| } catch (IOException ioEx) { |
| LOG.error("Unable to initialize Recon OM DB snapshot store.", |
| ioEx); |
| } |
| if (getStore() != null) { |
| initializeOmTables(); |
| } |
| } |
| |
| @Override |
| public void updateOmDB(File newDbLocation) throws IOException { |
| if (getStore() != null) { |
| File oldDBLocation = getStore().getDbLocation(); |
| if (oldDBLocation.exists()) { |
| LOG.info("Cleaning up old OM snapshot db at {}.", |
| oldDBLocation.getAbsolutePath()); |
| FileUtils.deleteDirectory(oldDBLocation); |
| } |
| } |
| initializeNewRdbStore(newDbLocation); |
| } |
| |
| } |