| /** |
| * 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.falcon.hive.mapreduce; |
| |
| |
| import org.apache.falcon.hive.HiveDRArgs; |
| import org.apache.falcon.hive.exception.HiveReplicationException; |
| import org.apache.falcon.hive.util.DRStatusStore; |
| import org.apache.falcon.hive.util.FileUtils; |
| import org.apache.falcon.hive.util.HiveDRStatusStore; |
| import org.apache.falcon.hive.util.ReplicationStatus; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Reducer; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.concurrent.ScheduledThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Reducer class for Hive DR. |
| */ |
| public class CopyReducer extends Reducer<Text, Text, Text, Text> { |
| private DRStatusStore hiveDRStore; |
| private ScheduledThreadPoolExecutor timer; |
| |
| @Override |
| protected void setup(Context context) throws IOException, InterruptedException { |
| Configuration conf = context.getConfiguration(); |
| FileSystem fs= FileSystem.get( |
| FileUtils.getConfiguration(context.getConfiguration(), |
| conf.get(HiveDRArgs.TARGET_NN.getName()), |
| conf.get(HiveDRArgs.TARGET_NN_KERBEROS_PRINCIPAL.getName()))); |
| hiveDRStore = new HiveDRStatusStore(fs); |
| } |
| |
| private List<ReplicationStatus> sortStatusList(List<ReplicationStatus> replStatusList) { |
| Collections.sort(replStatusList, new Comparator<ReplicationStatus>() { |
| @Override |
| public int compare(ReplicationStatus r1, ReplicationStatus r2) { |
| return (int) (r1.getEventId() - r2.getEventId()); |
| } |
| }); |
| return replStatusList; |
| } |
| |
| @Override |
| protected void reduce(Text key, Iterable<Text> values, final Context context) |
| throws IOException, InterruptedException { |
| List<ReplicationStatus> replStatusList = new ArrayList<ReplicationStatus>(); |
| ReplicationStatus rs; |
| timer = new ScheduledThreadPoolExecutor(1); |
| timer.scheduleAtFixedRate(new Runnable() { |
| public void run() { |
| System.out.println("Hive DR copy reducer progress heart beat"); |
| context.progress(); |
| } |
| }, 0, 30, TimeUnit.SECONDS); |
| |
| try { |
| for (Text value : values) { |
| String[] fields = (value.toString()).split("\t"); |
| rs = new ReplicationStatus(fields[0], fields[1], fields[2], fields[3], fields[4], |
| ReplicationStatus.Status.valueOf(fields[5]), Long.parseLong(fields[6])); |
| replStatusList.add(rs); |
| } |
| |
| hiveDRStore.updateReplicationStatus(key.toString(), sortStatusList(replStatusList)); |
| } catch (HiveReplicationException e) { |
| throw new IOException(e); |
| } finally { |
| timer.shutdownNow(); |
| } |
| } |
| |
| @Override |
| protected void cleanup(Context context) throws IOException, InterruptedException { |
| } |
| } |