| /* |
| * 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.mapreduce.lib.output.committer.manifest; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.compress.CompressionCodec; |
| import org.apache.hadoop.io.compress.GzipCodec; |
| import org.apache.hadoop.mapreduce.MRJobConfig; |
| import org.apache.hadoop.mapreduce.OutputFormat; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| /** |
| * A subclass of {@link TextOutputFormat} which logs what is happening, and |
| * returns a {@link LoggingLineRecordWriter} which allows the caller |
| * to get the destination path. |
| * @param <K> key |
| * @param <V> value |
| */ |
| public class TextOutputForTests<K, V> extends TextOutputFormat<K, V> { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(TextOutputForTests.class); |
| |
| public static final String NAME |
| = "org.apache.hadoop.fs.s3a.commit.LoggingTextOutputFormat"; |
| |
| @Override |
| public LoggingLineRecordWriter<K, V> getRecordWriter(TaskAttemptContext job) |
| throws IOException, InterruptedException { |
| Configuration conf = job.getConfiguration(); |
| boolean isCompressed = getCompressOutput(job); |
| String keyValueSeparator = conf.get(SEPARATOR, "\t"); |
| CompressionCodec codec = null; |
| String extension = ""; |
| if (isCompressed) { |
| Class<? extends CompressionCodec> codecClass = |
| getOutputCompressorClass(job, GzipCodec.class); |
| codec = ReflectionUtils.newInstance(codecClass, conf); |
| extension = codec.getDefaultExtension(); |
| } |
| Path file = getDefaultWorkFile(job, extension); |
| FileSystem fs = file.getFileSystem(conf); |
| FSDataOutputStream fileOut = fs.create(file, true); |
| LOG.debug("Creating LineRecordWriter with destination {}", file); |
| if (isCompressed) { |
| return new LoggingLineRecordWriter<>( |
| file, new DataOutputStream(codec.createOutputStream(fileOut)), |
| keyValueSeparator); |
| } else { |
| return new LoggingLineRecordWriter<>(file, fileOut, keyValueSeparator); |
| } |
| } |
| |
| /** |
| * Write a line; counts the number of lines written and logs @ debug in the |
| * {@code close()} call. |
| * @param <K> key |
| * @param <V> value |
| */ |
| public static class LoggingLineRecordWriter<K, V> |
| extends LineRecordWriter<K, V> { |
| |
| private final Path dest; |
| |
| private long lines; |
| |
| public LoggingLineRecordWriter(Path dest, DataOutputStream out, |
| String keyValueSeparator) { |
| super(out, keyValueSeparator); |
| this.dest = dest; |
| } |
| |
| public LoggingLineRecordWriter(DataOutputStream out, Path dest) { |
| super(out); |
| this.dest = dest; |
| } |
| |
| @Override |
| public synchronized void write(K key, V value) throws IOException { |
| super.write(key, value); |
| lines++; |
| } |
| |
| public synchronized void close(TaskAttemptContext context) |
| throws IOException { |
| LOG.debug("Closing output file {} with {} lines :{}", |
| dest, lines, out); |
| out.close(); |
| } |
| |
| public Path getDest() { |
| return dest; |
| } |
| |
| public long getLines() { |
| return lines; |
| } |
| } |
| |
| /** |
| * Bind to a configuration for job submission. |
| * @param conf configuration |
| */ |
| public static void bind(Configuration conf) { |
| conf.setClass(MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, |
| TextOutputForTests.class, |
| OutputFormat.class); |
| } |
| } |