org.apache.tajo.storage.TestByteBufLineReader.java Source code

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Here is the source code for org.apache.tajo.storage.TestByteBufLineReader.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.tajo.storage;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.storage.text.ByteBufLineReader;
import org.apache.tajo.util.CommonTestingUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.File;
import java.io.FileInputStream;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.UUID;

import static org.junit.Assert.*;

public class TestByteBufLineReader {
    private TajoConf conf;
    private static String TEST_PATH = "target/test-data/TestByteBufLineReader";
    private Path testDir;
    private FileSystem fs;
    private static String LINE = "A big data warehouse system on Hadoop";

    @Before
    public void setUp() throws Exception {
        conf = new TajoConf();
        testDir = CommonTestingUtil.getTestDir(TEST_PATH);
        fs = testDir.getFileSystem(conf);
    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void testReaderWithLocalFS() throws Exception {
        Path tablePath = new Path(testDir, "testReaderWithLocalFS");
        Path filePath = new Path(tablePath, "data.dat");

        FileSystem fileSystem = filePath.getFileSystem(conf);
        assertTrue(fileSystem instanceof LocalFileSystem);

        FSDataOutputStream out = fs.create(filePath, true);
        out.write(LINE.getBytes(Charset.defaultCharset()));
        out.write('\n');
        out.close();

        assertTrue(fs.exists(filePath));

        FSDataInputStream inputStream = fs.open(filePath);
        assertFalse(inputStream.getWrappedStream() instanceof ByteBufferReadable);

        ByteBufLineReader lineReader = new ByteBufLineReader(new FSDataInputChannel(inputStream));
        assertEquals(LINE, lineReader.readLine());
        lineReader.seek(0);
        assertEquals(LINE, lineReader.readLine());
        assertNull(lineReader.readLine());

        lineReader.close();
        fs.close();
    }

    @Test
    public void testReaderWithDFS() throws Exception {
        final Configuration conf = new HdfsConfiguration();
        String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
        conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
        conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
        conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true);

        final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
        cluster.waitClusterUp();

        TajoConf tajoConf = new TajoConf(conf);
        tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

        Path tablePath = new Path("/testReaderWithDFS");
        Path filePath = new Path(tablePath, "data.dat");
        try {
            DistributedFileSystem fs = cluster.getFileSystem();
            FSDataOutputStream out = fs.create(filePath, true);
            out.write(LINE.getBytes(Charset.defaultCharset()));
            out.write('\n');
            out.close();

            assertTrue(fs.exists(filePath));
            FSDataInputStream inputStream = fs.open(filePath);
            assertTrue(inputStream.getWrappedStream() instanceof ByteBufferReadable);

            ByteBufLineReader lineReader = new ByteBufLineReader(new FSDataInputChannel(inputStream));
            assertEquals(LINE, lineReader.readLine());
            lineReader.seek(0);
            assertEquals(LINE, lineReader.readLine());
            assertNull(lineReader.readLine());

            lineReader.close();
            fs.close();
        } finally {
            cluster.shutdown(true);
        }
    }

    @Test
    public void testReaderWithNIO() throws Exception {
        Path tablePath = new Path(testDir, "testReaderWithNIO");
        Path filePath = new Path(tablePath, "data.dat");

        FileSystem fileSystem = filePath.getFileSystem(conf);
        assertTrue(fileSystem instanceof LocalFileSystem);

        FSDataOutputStream out = fs.create(filePath, true);
        out.write(LINE.getBytes(Charset.defaultCharset()));
        out.write('\n');
        out.close();

        File file = new File(filePath.toUri());
        assertTrue(file.exists());

        FileInputStream inputStream = new FileInputStream(file);
        FileChannel channel = inputStream.getChannel();

        ByteBufLineReader lineReader = new ByteBufLineReader(new LocalFileInputChannel(channel));

        assertEquals(LINE, lineReader.readLine());
        lineReader.seek(0);
        assertEquals(LINE, lineReader.readLine());
        assertNull(lineReader.readLine());

        lineReader.close();
        channel.close();
        inputStream.close();
    }
}