| /* |
| * 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.nutch.util; |
| |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandles; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.mapreduce.Job; |
| |
| /** A {@link Job} for Nutch jobs. */ |
| public class NutchJob extends Job { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @SuppressWarnings("deprecation") |
| public NutchJob(Configuration conf, String jobName) throws IOException { |
| super(conf, jobName); |
| } |
| |
| public static Job getInstance(Configuration conf) throws IOException { |
| return Job.getInstance(conf); |
| } |
| |
| /** |
| * Clean up the file system in case of a job failure. |
| * @param tempDir The temporary directory which needs to be |
| * deleted/cleaned-up. |
| * @param fs The {@link org.apache.hadoop.fs.FileSystem} on which |
| * the tempDir resides. |
| * @throws IOException Occurs if there is fatal I/O error whilst performing |
| * the cleanup. |
| */ |
| public static void cleanupAfterFailure(Path tempDir, FileSystem fs) |
| throws IOException { |
| cleanupAfterFailure(tempDir, null, fs); |
| } |
| |
| /** |
| * Clean up the file system in case of a job failure. |
| * @param tempDir The temporary directory which needs to be |
| * deleted/cleaned-up. |
| * @param lock A lockfile if one exists. |
| * @see LockUtil#removeLockFile(FileSystem, Path) |
| * @param fs The {@link org.apache.hadoop.fs.FileSystem} on which |
| * the tempDir resides. |
| * @throws IOException Occurs if there is fatal I/O error whilst performing |
| * the cleanup. |
| */ |
| public static void cleanupAfterFailure(Path tempDir, Path lock, FileSystem fs) |
| throws IOException { |
| try { |
| if (fs.exists(tempDir)) { |
| fs.delete(tempDir, true); |
| } |
| if (lock != null) { |
| LockUtil.removeLockFile(fs, lock); |
| } |
| } catch (IOException e) { |
| LOG.error("NutchJob cleanup failed: {}", e.getMessage()); |
| throw e; |
| } |
| } |
| |
| } |