| /** |
| * 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.pig.test; |
| |
| import java.io.IOException; |
| import java.util.Properties; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.pig.ExecType; |
| import org.apache.pig.backend.hadoop.datastorage.ConfigurationUtil; |
| import org.apache.pig.backend.hadoop.executionengine.Launcher; |
| |
| /** |
| * This class builds a single instance of itself with the Singleton |
| * design pattern. While building the single instance, it sets up a |
| * mini cluster that actually consists of a mini DFS cluster and a |
| * mini MapReduce cluster on the local machine and also sets up the |
| * environment for Pig to run on top of the mini cluster. |
| * |
| * This class is the base class for MiniCluster, which has slightly |
| * difference among different versions of hadoop. MiniCluster implementation |
| * is located in $PIG_HOME/shims. |
| */ |
| abstract public class MiniGenericCluster { |
| protected MiniDFSCluster m_dfs = null; |
| protected FileSystem m_fileSys = null; |
| protected Configuration m_conf = null; |
| |
| protected static MiniGenericCluster INSTANCE = null; |
| protected static boolean isSetup = false; |
| |
| public static String EXECTYPE_MR = "mr"; |
| public static String EXECTYPE_TEZ = "tez"; |
| |
| /** |
| * Returns the single instance of class MiniGenericCluster that represents |
| * the resources for a mini dfs cluster and a mini mr (or tez) cluster. The |
| * system property "test.exec.type" is used to decide whether a mr or tez mini |
| * cluster will be returned. |
| */ |
| public static MiniGenericCluster buildCluster() { |
| if (INSTANCE == null) { |
| String execType = System.getProperty("test.exec.type"); |
| if (execType == null) { |
| // Default to MR |
| System.setProperty("test.exec.type", EXECTYPE_MR); |
| return buildCluster(EXECTYPE_MR); |
| } |
| |
| return buildCluster(execType); |
| } |
| return INSTANCE; |
| } |
| |
| public static MiniGenericCluster buildCluster(String execType) { |
| if (INSTANCE == null) { |
| if (execType.equalsIgnoreCase(EXECTYPE_MR)) { |
| INSTANCE = new MiniCluster(); |
| } else if (execType.equalsIgnoreCase(EXECTYPE_TEZ)) { |
| INSTANCE = new TezMiniCluster(); |
| } else { |
| throw new RuntimeException("Unknown test.exec.type: " + execType); |
| } |
| } |
| if (!isSetup) { |
| INSTANCE.setupMiniDfsAndMrClusters(); |
| isSetup = true; |
| } |
| return INSTANCE; |
| } |
| |
| abstract public ExecType getExecType(); |
| |
| abstract protected void setupMiniDfsAndMrClusters(); |
| |
| public void shutDown(){ |
| INSTANCE.shutdownMiniDfsAndMrClusters(); |
| } |
| |
| @Override |
| protected void finalize() { |
| shutdownMiniDfsAndMrClusters(); |
| } |
| |
| protected void shutdownMiniDfsAndMrClusters() { |
| isSetup = false; |
| shutdownMiniDfsClusters(); |
| shutdownMiniMrClusters(); |
| m_conf = null; |
| } |
| |
| protected void shutdownMiniDfsClusters() { |
| try { |
| if (m_fileSys != null) { m_fileSys.close(); } |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| if (m_dfs != null) { m_dfs.shutdown(); } |
| m_fileSys = null; |
| m_dfs = null; |
| } |
| |
| abstract protected void shutdownMiniMrClusters(); |
| |
| public Properties getProperties() { |
| errorIfNotSetup(); |
| return ConfigurationUtil.toProperties(m_conf); |
| } |
| |
| public Configuration getConfiguration() { |
| return new Configuration(m_conf); |
| } |
| |
| public void setProperty(String name, String value) { |
| errorIfNotSetup(); |
| m_conf.set(name, value); |
| } |
| |
| public FileSystem getFileSystem() { |
| errorIfNotSetup(); |
| return m_fileSys; |
| } |
| |
| /** |
| * Throw RunTimeException if isSetup is false |
| */ |
| private void errorIfNotSetup(){ |
| if(isSetup) |
| return; |
| String msg = "function called on MiniCluster that has been shutdown"; |
| throw new RuntimeException(msg); |
| } |
| |
| static public Launcher getLauncher() { |
| String execType = System.getProperty("test.exec.type"); |
| if (execType == null) { |
| System.setProperty("test.exec.type", EXECTYPE_MR); |
| } |
| if (execType.equalsIgnoreCase(EXECTYPE_MR)) { |
| return MiniCluster.getLauncher(); |
| } else if (execType.equalsIgnoreCase(EXECTYPE_TEZ)) { |
| return TezMiniCluster.getLauncher(); |
| } else { |
| throw new RuntimeException("Unknown test.exec.type: " + execType); |
| } |
| } |
| } |