| /** |
| * 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.avro.mapred.tether; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.FileOutputFormat; |
| import org.apache.hadoop.mapred.RecordWriter; |
| import org.apache.hadoop.util.Progressable; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.generic.GenericDatumWriter; |
| import org.apache.avro.file.DataFileWriter; |
| import org.apache.avro.file.CodecFactory; |
| import org.apache.avro.mapred.AvroJob; |
| import org.apache.avro.mapred.AvroOutputFormat; |
| |
| /** An {@link org.apache.hadoop.mapred.OutputFormat} for Avro data files. */ |
| class TetherOutputFormat |
| extends FileOutputFormat<TetherData, NullWritable> { |
| |
| /** Enable output compression using the deflate codec and specify its level.*/ |
| public static void setDeflateLevel(JobConf job, int level) { |
| FileOutputFormat.setCompressOutput(job, true); |
| job.setInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, level); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public RecordWriter<TetherData, NullWritable> |
| getRecordWriter(FileSystem ignore, JobConf job, |
| String name, Progressable prog) |
| throws IOException { |
| |
| Schema schema = AvroJob.getOutputSchema(job); |
| |
| final DataFileWriter writer = new DataFileWriter(new GenericDatumWriter()); |
| |
| if (FileOutputFormat.getCompressOutput(job)) { |
| int level = job.getInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, |
| CodecFactory.DEFAULT_DEFLATE_LEVEL); |
| writer.setCodec(CodecFactory.deflateCodec(level)); |
| } |
| |
| Path path = |
| FileOutputFormat.getTaskOutputPath(job, name+AvroOutputFormat.EXT); |
| writer.create(schema, path.getFileSystem(job).create(path)); |
| |
| return new RecordWriter<TetherData, NullWritable>() { |
| public void write(TetherData datum, NullWritable ignore) |
| throws IOException { |
| writer.appendEncoded(datum.buffer()); |
| } |
| public void close(Reporter reporter) throws IOException { |
| writer.close(); |
| } |
| }; |
| } |
| |
| } |