Java tutorial
/* * 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.solr.hadoop.hack; import java.io.File; import java.io.IOException; import java.util.Random; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.mapred.JobConf; import org.apache.hadoop.mapred.JobID; import org.apache.hadoop.mapred.JobPriority; import org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate; import org.apache.hadoop.mapred.TaskCompletionEvent; import org.apache.hadoop.security.AccessControlException; import org.apache.hadoop.security.UserGroupInformation; import org.apache.hadoop.yarn.conf.YarnConfiguration; import org.apache.lucene.util.LuceneTestCase; /** * This class is an MR2 replacement for older MR1 MiniMRCluster, that was used * by tests prior to MR2. This replacement class uses the new MiniMRYarnCluster * in MR2 but provides the same old MR1 interface, so tests can be migrated from * MR1 to MR2 with minimal changes. * * Due to major differences between MR1 and MR2, a number of methods are either * unimplemented/unsupported or were re-implemented to provide wrappers around * MR2 functionality. * * @deprecated Use {@link org.apache.hadoop.mapred.MiniMRClientClusterFactory} * instead */ @Deprecated public class MiniMRCluster { private static final Log LOG = LogFactory.getLog(MiniMRCluster.class); private MiniMRClientCluster mrClientCluster; public String getTaskTrackerLocalDir(int taskTracker) { throw new UnsupportedOperationException(); } public String[] getTaskTrackerLocalDirs(int taskTracker) { throw new UnsupportedOperationException(); } class JobTrackerRunner { // Mock class } class TaskTrackerRunner { // Mock class } public JobTrackerRunner getJobTrackerRunner() { throw new UnsupportedOperationException(); } TaskTrackerRunner getTaskTrackerRunner(int id) { throw new UnsupportedOperationException(); } public int getNumTaskTrackers() { throw new UnsupportedOperationException(); } public void setInlineCleanupThreads() { throw new UnsupportedOperationException(); } public void waitUntilIdle() { throw new UnsupportedOperationException(); } private void waitTaskTrackers() { throw new UnsupportedOperationException(); } public int getJobTrackerPort() { throw new UnsupportedOperationException(); } public JobConf createJobConf() { JobConf jobConf = null; try { jobConf = new JobConf(mrClientCluster.getConfig()); } catch (IOException e) { LOG.error(e); } return jobConf; } public JobConf createJobConf(JobConf conf) { JobConf jobConf = null; try { jobConf = new JobConf(mrClientCluster.getConfig()); } catch (IOException e) { LOG.error(e); } return jobConf; } static JobConf configureJobConf(JobConf conf, String namenode, int jobTrackerPort, int jobTrackerInfoPort, UserGroupInformation ugi) { throw new UnsupportedOperationException(); } public MiniMRCluster(int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts) throws Exception { this(0, 0, numTaskTrackers, namenode, numDir, racks, hosts); } public MiniMRCluster(int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts, JobConf conf) throws Exception { this(0, 0, numTaskTrackers, namenode, numDir, racks, hosts, null, conf); } public MiniMRCluster(int numTaskTrackers, String namenode, int numDir) throws Exception { this(0, 0, numTaskTrackers, namenode, numDir); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, null); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, racks, null); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, racks, hosts, null); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts, UserGroupInformation ugi) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, racks, hosts, ugi, null); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts, UserGroupInformation ugi, JobConf conf) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, racks, hosts, ugi, conf, 0); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts, UserGroupInformation ugi, JobConf conf, int numTrackerToExclude) throws Exception { this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir, racks, hosts, ugi, conf, numTrackerToExclude, new Clock()); } public MiniMRCluster(int jobTrackerPort, int taskTrackerPort, int numTaskTrackers, String namenode, int numDir, String[] racks, String[] hosts, UserGroupInformation ugi, JobConf conf, int numTrackerToExclude, Clock clock) throws Exception { if (conf == null) conf = new JobConf(); FileSystem.setDefaultUri(conf, namenode); String identifier = this.getClass().getSimpleName() + "_" + Integer.toString(LuceneTestCase.random().nextInt(Integer.MAX_VALUE)); mrClientCluster = MiniMRClientClusterFactory.create(this.getClass(), identifier, numTaskTrackers, conf, new File(conf.get("testWorkDir"))); } public UserGroupInformation getUgi() { throw new UnsupportedOperationException(); } public TaskCompletionEvent[] getTaskCompletionEvents(JobID id, int from, int max) throws IOException { throw new UnsupportedOperationException(); } public void setJobPriority(JobID jobId, JobPriority priority) throws AccessControlException, IOException { throw new UnsupportedOperationException(); } public JobPriority getJobPriority(JobID jobId) { throw new UnsupportedOperationException(); } public long getJobFinishTime(JobID jobId) { throw new UnsupportedOperationException(); } public void initializeJob(JobID jobId) throws IOException { throw new UnsupportedOperationException(); } public MapTaskCompletionEventsUpdate getMapTaskCompletionEventsUpdates(int index, JobID jobId, int max) throws IOException { throw new UnsupportedOperationException(); } public JobConf getJobTrackerConf() { JobConf jobConf = null; try { jobConf = new JobConf(mrClientCluster.getConfig()); } catch (IOException e) { LOG.error(e); } return jobConf; } public int getFaultCount(String hostName) { throw new UnsupportedOperationException(); } public void startJobTracker() { // Do nothing } public void startJobTracker(boolean wait) { // Do nothing } public void stopJobTracker() { // Do nothing } public void stopTaskTracker(int id) { // Do nothing } public void startTaskTracker(String host, String rack, int idx, int numDir) throws IOException { // Do nothing } void addTaskTracker(TaskTrackerRunner taskTracker) { throw new UnsupportedOperationException(); } int getTaskTrackerID(String trackerName) { throw new UnsupportedOperationException(); } public void shutdown() { try { mrClientCluster.stop(); } catch (IOException e) { LOG.error(e); } } static class Clock { long getTime() { return System.currentTimeMillis(); } } }