| /** |
| * 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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.hbase.master.snapshot; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.ThreadPoolExecutor; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceStability; |
| import org.apache.hadoop.hbase.HRegionInfo; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.client.RegionReplicaUtil; |
| import org.apache.hadoop.hbase.errorhandling.ForeignException; |
| import org.apache.hadoop.hbase.master.MasterServices; |
| import org.apache.hadoop.hbase.mob.MobUtils; |
| import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription; |
| import org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils; |
| import org.apache.hadoop.hbase.snapshot.SnapshotManifest; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.hbase.util.FSUtils; |
| import org.apache.hadoop.hbase.util.ModifyRegionUtils; |
| import org.apache.hadoop.hbase.util.Pair; |
| import org.apache.zookeeper.KeeperException; |
| |
| /** |
| * Take a snapshot of a disabled table. |
| * <p> |
| * Table must exist when taking the snapshot, or results are undefined. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class DisabledTableSnapshotHandler extends TakeSnapshotHandler { |
| private static final Log LOG = LogFactory.getLog(DisabledTableSnapshotHandler.class); |
| |
| /** |
| * @param snapshot descriptor of the snapshot to take |
| * @param masterServices master services provider |
| */ |
| public DisabledTableSnapshotHandler(SnapshotDescription snapshot, |
| final MasterServices masterServices) { |
| super(snapshot, masterServices); |
| } |
| |
| @Override |
| public DisabledTableSnapshotHandler prepare() throws Exception { |
| return (DisabledTableSnapshotHandler) super.prepare(); |
| } |
| |
| // TODO consider parallelizing these operations since they are independent. Right now its just |
| // easier to keep them serial though |
| @Override |
| public void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regionsAndLocations) |
| throws IOException, KeeperException { |
| try { |
| // 1. get all the regions hosting this table. |
| |
| // extract each pair to separate lists |
| Set<HRegionInfo> regions = new HashSet<HRegionInfo>(); |
| for (Pair<HRegionInfo, ServerName> p : regionsAndLocations) { |
| // Don't include non-default regions |
| HRegionInfo hri = p.getFirst(); |
| if (RegionReplicaUtil.isDefaultReplica(hri)) { |
| regions.add(hri); |
| } |
| // if it's the first region, add the mob region |
| if (Bytes.equals(hri.getStartKey(), HConstants.EMPTY_START_ROW)) { |
| HRegionInfo mobRegion = MobUtils.getMobRegionInfo(hri.getTable()); |
| regions.add(mobRegion); |
| } |
| } |
| |
| // 2. for each region, write all the info to disk |
| String msg = "Starting to write region info and WALs for regions for offline snapshot:" |
| + ClientSnapshotDescriptionUtils.toString(snapshot); |
| LOG.info(msg); |
| status.setStatus(msg); |
| |
| ThreadPoolExecutor exec = SnapshotManifest.createExecutor(conf, "DisabledTableSnapshot"); |
| try { |
| ModifyRegionUtils.editRegions(exec, regions, new ModifyRegionUtils.RegionEditTask() { |
| @Override |
| public void editRegion(final HRegionInfo regionInfo) throws IOException { |
| snapshotManifest.addRegion(FSUtils.getTableDir(rootDir, snapshotTable), regionInfo); |
| } |
| }); |
| } finally { |
| exec.shutdown(); |
| } |
| } catch (Exception e) { |
| // make sure we capture the exception to propagate back to the client later |
| String reason = "Failed snapshot " + ClientSnapshotDescriptionUtils.toString(snapshot) |
| + " due to exception:" + e.getMessage(); |
| ForeignException ee = new ForeignException(reason, e); |
| monitor.receive(ee); |
| status.abort("Snapshot of table: "+ snapshotTable + " failed because " + e.getMessage()); |
| } finally { |
| LOG.debug("Marking snapshot" + ClientSnapshotDescriptionUtils.toString(snapshot) |
| + " as finished."); |
| } |
| } |
| } |