/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/io/HiveSequenceFileOutputFormat.java
Java | 79 lines | 34 code | 10 blank | 35 comment | 0 complexity | 493d9982b8210ec798e4924ad16f4227 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.hive.ql.io;
- import java.io.IOException;
- import java.util.Properties;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.hive.ql.exec.Utilities;
- import org.apache.hadoop.hive.ql.exec.FileSinkOperator.RecordWriter;
- import org.apache.hadoop.io.BytesWritable;
- import org.apache.hadoop.io.SequenceFile;
- import org.apache.hadoop.io.Writable;
- import org.apache.hadoop.io.WritableComparable;
- import org.apache.hadoop.mapred.JobConf;
- import org.apache.hadoop.mapred.SequenceFileOutputFormat;
- import org.apache.hadoop.util.Progressable;
- /** A {@link HiveOutputFormat} that writes {@link SequenceFile}s. */
- public class HiveSequenceFileOutputFormat extends SequenceFileOutputFormat
- implements HiveOutputFormat<WritableComparable, Writable> {
- BytesWritable EMPTY_KEY = new BytesWritable();
- /**
- * create the final out file, and output an empty key as the key.
- *
- * @param jc
- * the job configuration file
- * @param finalOutPath
- * the final output file to be created
- * @param valueClass
- * the value class used for create
- * @param isCompressed
- * whether the content is compressed or not
- * @param tableProperties
- * the tableInfo of this file's corresponding table
- * @param progress
- * progress used for status report
- * @return the RecordWriter for the output file
- */
- @Override
- public RecordWriter getHiveRecordWriter(JobConf jc, Path finalOutPath,
- Class<? extends Writable> valueClass, boolean isCompressed,
- Properties tableProperties, Progressable progress) throws IOException {
- FileSystem fs = finalOutPath.getFileSystem(jc);
- final SequenceFile.Writer outStream = Utilities.createSequenceWriter(jc,
- fs, finalOutPath, BytesWritable.class, valueClass, isCompressed);
- return new RecordWriter() {
- public void write(Writable r) throws IOException {
- outStream.append(EMPTY_KEY, r);
- }
- public void close(boolean abort) throws IOException {
- outStream.close();
- }
- };
- }
- }