| /** |
| * 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.sqoop.util; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| import org.apache.sqoop.config.ConfigurationConstants; |
| |
| /** |
| * Utility class; returns task attempt Id of the current job |
| * regardless of Hadoop version being used. |
| */ |
| public final class TaskId { |
| |
| private TaskId() { } |
| |
| /** |
| * Return the task attempt id as a string. |
| * @param conf the Configuration to check for the current task attempt id. |
| * @param defaultVal the value to return if a task attempt id is not set. |
| * @return the current task attempt id, or the default value if one isn't set. |
| */ |
| public static String get(Configuration conf, String defaultVal) { |
| return conf.get("mapreduce.task.id", |
| conf.get("mapred.task.id", defaultVal)); |
| } |
| |
| /** |
| * Return the local filesystem dir where the current task attempt can |
| * perform work. |
| * @return a File describing a directory where local temp data for the |
| * task attempt can be stored. |
| */ |
| public static File getLocalWorkPath(Configuration conf) throws IOException { |
| String tmpDir = conf.get( |
| ConfigurationConstants.PROP_JOB_LOCAL_DIRECTORY, |
| "/tmp/"); |
| |
| // Create a local subdir specific to this task attempt. |
| String taskAttemptStr = TaskId.get(conf, "task_attempt"); |
| File taskAttemptDir = new File(tmpDir, taskAttemptStr); |
| if (!taskAttemptDir.exists()) { |
| boolean createdDir = taskAttemptDir.mkdirs(); |
| if (!createdDir) { |
| throw new IOException("Could not create missing task attempt dir: " |
| + taskAttemptDir.toString()); |
| } |
| } |
| |
| return taskAttemptDir; |
| } |
| |
| } |