org.apache.sqoop.connector.hdfs.TestHdfsBase.java Source code

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Here is the source code for org.apache.sqoop.connector.hdfs.TestHdfsBase.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.sqoop.connector.hdfs;

import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.CompressionCodec;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.UUID;

public class TestHdfsBase {

    protected HdfsPartition createPartition(Path[] paths) throws IOException {
        long[] offsets = new long[paths.length];
        long[] lengths = new long[paths.length];
        String[] locations = new String[paths.length];
        FileSystem fs = FileSystem.get(new Configuration());

        for (int i = 0; i < offsets.length; ++i) {
            locations[i] = paths[i].getName();
            lengths[i] = fs.getFileStatus(paths[i]).getLen();
        }

        return new HdfsPartition(paths, offsets, lengths, locations);
    }

    protected void createTextInput(String indir, Class<? extends CompressionCodec> clz, int numberOfFiles,
            int numberOfRows) throws IOException, InstantiationException, IllegalAccessException {
        Configuration conf = new Configuration();

        CompressionCodec codec = null;
        String extension = "";
        if (clz != null) {
            codec = clz.newInstance();
            if (codec instanceof Configurable) {
                ((Configurable) codec).setConf(conf);
            }
            extension = codec.getDefaultExtension();
        }

        int index = 1;
        for (int fi = 0; fi < numberOfFiles; fi++) {
            String fileName = indir + "/" + UUID.randomUUID() + extension;
            OutputStream filestream = FileUtils.create(fileName);
            BufferedWriter filewriter;
            if (codec != null) {
                filewriter = new BufferedWriter(new OutputStreamWriter(
                        codec.createOutputStream(filestream, codec.createCompressor()), "UTF-8"));
            } else {
                filewriter = new BufferedWriter(new OutputStreamWriter(filestream, "UTF-8"));
            }

            for (int ri = 0; ri < numberOfRows; ri++) {
                String row = index + "," + (double) index + ",'" + index + "'";
                filewriter.write(row + HdfsConstants.DEFAULT_RECORD_DELIMITER);
                index++;
            }

            filewriter.close();
        }
    }

    protected void createSequenceInput(String indir, Class<? extends CompressionCodec> clz, int numberOfFiles,
            int numberOfRows) throws IOException, InstantiationException, IllegalAccessException {
        Configuration conf = new Configuration();

        CompressionCodec codec = null;
        if (clz != null) {
            codec = clz.newInstance();
            if (codec instanceof Configurable) {
                ((Configurable) codec).setConf(conf);
            }
        }

        int index = 1;
        for (int fi = 0; fi < numberOfFiles; fi++) {
            Path filepath = new Path(indir, UUID.randomUUID() + ".seq");
            SequenceFile.Writer filewriter;
            if (codec != null) {
                filewriter = SequenceFile.createWriter(filepath.getFileSystem(conf), conf, filepath, Text.class,
                        NullWritable.class, SequenceFile.CompressionType.BLOCK, codec);
            } else {
                filewriter = SequenceFile.createWriter(filepath.getFileSystem(conf), conf, filepath, Text.class,
                        NullWritable.class, SequenceFile.CompressionType.NONE);
            }

            Text text = new Text();
            for (int ri = 0; ri < numberOfRows; ri++) {
                String row = index + "," + (double) index + ",'" + index + "'";
                text.set(row);
                filewriter.append(text, NullWritable.get());
                index++;
            }

            filewriter.close();
        }
    }
}