org.apache.sysml.runtime.matrix.data.UnPaddedOutputFormat.java Source code

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Here is the source code for org.apache.sysml.runtime.matrix.data.UnPaddedOutputFormat.java

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/*
 * 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.sysml.runtime.matrix.data;

import java.io.IOException;

import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.util.Progressable;
import org.apache.sysml.runtime.io.IOUtilFunctions;
import org.apache.sysml.runtime.matrix.mapred.MRConfigurationNames;

public class UnPaddedOutputFormat<K extends Writable, V extends Writable> extends FileOutputFormat<K, V> {

    public static class UnpaddedRecordWriter<K extends Writable, V extends Writable> implements RecordWriter<K, V> {
        /** file input stream */
        private FSDataOutputStream out;

        public UnpaddedRecordWriter(FSDataOutputStream fstream) {
            out = fstream;
        }

        @Override
        public void close(Reporter report) throws IOException {
            IOUtilFunctions.closeSilently(out);
        }

        @Override
        public void write(K key, V value) throws IOException {
            key.write(out);
            value.write(out);
        }
    }

    @Override
    public RecordWriter<K, V> getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)
            throws IOException {
        Path file = FileOutputFormat.getTaskOutputPath(job, name);
        FileSystem fs = file.getFileSystem(job);
        FSDataOutputStream fileOut = fs.create(file, true,
                job.getInt(MRConfigurationNames.IO_FILE_BUFFER_SIZE, 4096), progress);
        return new UnpaddedRecordWriter<>(fileOut);
    }
}