com.inmobi.messaging.consumer.databus.mapred.TestDatabusBytesWritableInputFormat.java Source code

Introduction

Here is the source code for com.inmobi.messaging.consumer.databus.mapred.TestDatabusBytesWritableInputFormat.java

Source

package com.inmobi.messaging.consumer.databus.mapred;

/*
 * #%L
 * messaging-client-databus
 * %%
 * Copyright (C) 2012 - 2014 InMobi
 * %%
 * Licensed 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.
 * #L%
 */

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.Reporter;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

import com.inmobi.messaging.Message;
import com.inmobi.messaging.consumer.databus.TestAbstractInputFormat;

public class TestDatabusBytesWritableInputFormat extends TestAbstractInputFormat {

    private static final Log LOG = LogFactory.getLog(TestDatabusBytesWritableInputFormat.class.getName());
    DatabusBytesWritableInputFormat databusInputFormat;

    @BeforeTest
    public void setUp() throws Exception {
        databusInputFormat = new DatabusBytesWritableInputFormat();
        rootDir = new Path("file:///", new Path(System.getProperty("test.root.dir"), "databustestMapRed"));
        super.setUp();
    }

    /**
     * read the the given input split.
     * @return List : List of read messages
     */
    private List<Message> readSplit(DatabusBytesWritableInputFormat format, InputSplit split, JobConf job,
            Reporter reporter) throws IOException {
        List<Message> result = new ArrayList<Message>();
        RecordReader<LongWritable, BytesWritable> reader = format.getRecordReader(split, job, reporter);
        LongWritable key = ((DatabusBytesWritableRecordReader) reader).createKey();
        BytesWritable value = ((DatabusBytesWritableRecordReader) reader).createValue();

        while (((DatabusBytesWritableRecordReader) reader).next(key, value)) {
            byte[] data = new byte[value.getLength()];
            System.arraycopy(value.getBytes(), 0, data, 0, value.getLength());
            result.add(new Message(ByteBuffer.wrap(data)));
            value = (BytesWritable) ((DatabusBytesWritableRecordReader) reader).createValue();
        }
        reader.close();
        return result;
    }

    protected void splitFile(int numSplits) throws Exception {
        InputSplit[] inputSplit = databusInputFormat.getSplits(defaultConf, numSplits);
        LOG.info("number of splits : " + inputSplit.length);
        for (InputSplit split : inputSplit) {
            readMessages.addAll(readSplit(databusInputFormat, split, defaultConf, reporter));
        }
    }

    /**
     * It reads the collector file (i.e. non compressed file) and assert on the
     * read messages
     */
    @Test
    public void testDatabusBytesWritableInputFormat() throws Exception {
        FileInputFormat.setInputPaths(defaultConf, collectorDir);
        splitFile(5);
        assertMessages(100);
    }

    /**
     * It reads the local stream file(i.e. compressed file) and assert on the
     * read messages
     */
    @Test
    protected void testGZFile() throws Exception {
        Path localstreamDir = new Path(cluster.getLocalFinalDestDirRoot(), testStream);
        List<Path> minuteDirs = new ArrayList<Path>();
        listAllPaths(localstreamDir, minuteDirs);
        if (minuteDirs.size() > 0) {
            FileInputFormat.setInputPaths(defaultConf, minuteDirs.get(0).getParent());
            readMessages = new ArrayList<Message>();
            splitFile(1);
            assertMessages(0);
        }
    }

    @AfterTest
    public void cleanUp() throws Exception {
        LOG.debug("Cleaning up the dir: " + rootDir);
        fs.delete(rootDir, true);
    }
}