| /** |
| * 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.raid; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| import org.apache.hadoop.util.Daemon; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.FileStatus; |
| |
| import org.apache.hadoop.raid.protocol.PolicyInfo; |
| |
| /** |
| * Implementation of {@link RaidNode} that uses map reduce jobs to raid files. |
| */ |
| public class DistRaidNode extends RaidNode { |
| |
| public static final Log LOG = LogFactory.getLog(DistRaidNode.class); |
| |
| /** Daemon thread to monitor raid job progress */ |
| JobMonitor jobMonitor = null; |
| Daemon jobMonitorThread = null; |
| |
| public DistRaidNode(Configuration conf) throws IOException { |
| super(conf); |
| this.jobMonitor = new JobMonitor(conf); |
| this.jobMonitorThread = new Daemon(this.jobMonitor); |
| this.jobMonitorThread.start(); |
| |
| LOG.info("created"); |
| } |
| |
| /** |
| * {@inheritDocs} |
| */ |
| @Override |
| public void join() { |
| super.join(); |
| try { |
| if (jobMonitorThread != null) jobMonitorThread.join(); |
| } catch (InterruptedException ie) { |
| // do nothing |
| } |
| } |
| |
| /** |
| * {@inheritDocs} |
| */ |
| @Override |
| public void stop() { |
| if (stopRequested) { |
| return; |
| } |
| super.stop(); |
| if (jobMonitor != null) jobMonitor.running = false; |
| if (jobMonitorThread != null) jobMonitorThread.interrupt(); |
| } |
| |
| |
| /** |
| * {@inheritDocs} |
| */ |
| @Override |
| void raidFiles(PolicyInfo info, List<FileStatus> paths) throws IOException { |
| // We already checked that no job for this policy is running |
| // So we can start a new job. |
| DistRaid dr = new DistRaid(conf); |
| //add paths for distributed raiding |
| dr.addRaidPaths(info, paths); |
| boolean started = dr.startDistRaid(); |
| if (started) { |
| jobMonitor.monitorJob(info.getName(), dr); |
| } |
| } |
| |
| /** |
| * {@inheritDocs} |
| */ |
| @Override |
| int getRunningJobsForPolicy(String policyName) { |
| return jobMonitor.runningJobsCount(policyName); |
| } |
| |
| |
| } |