gobblin.runtime.mapreduce.GobblinOutputCommitterTest.java Source code

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Here is the source code for gobblin.runtime.mapreduce.GobblinOutputCommitterTest.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 gobblin.runtime.mapreduce;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobStatus;

import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import com.google.common.collect.Lists;
import com.google.common.io.Closer;

import gobblin.configuration.ConfigurationKeys;
import gobblin.source.workunit.MultiWorkUnit;
import gobblin.source.workunit.WorkUnit;
import gobblin.util.ForkOperatorUtils;

/**
 * Unit tests for {@link GobblinOutputFormat}
 */
@Test(groups = { "gobblin.runtime.mapreduce" })
public class GobblinOutputCommitterTest {

    private Configuration conf;
    private FileSystem fs;
    private List<Path> stagingDirs;

    private static final Path OUTPUT_PATH = new Path("gobblin-test/output-format-test");

    private static final String STAGING_DIR_NAME = "staging";
    private static final String OUTPUT_DIR_NAME = "output";
    private static final String JOB_NAME = "GobblinOutputFormatTest";

    @BeforeClass
    public void setupWorkUnitFiles() throws IOException {
        this.conf = new Configuration();
        this.fs = FileSystem.getLocal(this.conf);
        this.stagingDirs = Lists.newArrayList();

        // Create a list of WorkUnits to serialize
        WorkUnit wu1 = createAndSetWorkUnit("wu1");
        WorkUnit wu2 = createAndSetWorkUnit("wu2");
        WorkUnit wu3 = createAndSetWorkUnit("wu3");
        WorkUnit wu4 = createAndSetWorkUnit("wu4");

        // Create a MultiWorkUnit to serialize
        MultiWorkUnit mwu1 = MultiWorkUnit.createEmpty();
        mwu1.setProp(ConfigurationKeys.TASK_ID_KEY, System.nanoTime());
        mwu1.addWorkUnits(Arrays.asList(wu3, wu4));

        Path inputDir = new Path(new Path(OUTPUT_PATH, JOB_NAME), "input");

        // Writer each WorkUnit to a separate file under inputDir
        Closer closer = Closer.create();
        try {
            wu1.write(closer.register(this.fs
                    .create(new Path(inputDir, wu1.getProp(ConfigurationKeys.TASK_ID_KEY) + Path.SEPARATOR + "_")
                            .suffix("wu"))));
            wu2.write(closer.register(this.fs
                    .create(new Path(inputDir, wu2.getProp(ConfigurationKeys.TASK_ID_KEY) + Path.SEPARATOR + "_")
                            .suffix("wu"))));
            mwu1.write(closer.register(this.fs
                    .create(new Path(inputDir, mwu1.getProp(ConfigurationKeys.TASK_ID_KEY) + Path.SEPARATOR + "_")
                            .suffix("mwu"))));
        } finally {
            closer.close();
        }
    }

    @Test()
    public void testAbortJob() throws IOException {
        // Make sure all the staging dirs have been created
        for (Path stagingDir : this.stagingDirs) {
            Assert.assertTrue(this.fs.exists(stagingDir));
        }

        // Cleanup the staging dirs
        Configuration conf = new Configuration();
        conf.set(ConfigurationKeys.FS_URI_KEY, ConfigurationKeys.LOCAL_FS_URI);
        conf.set(ConfigurationKeys.MR_JOB_ROOT_DIR_KEY, OUTPUT_PATH.toString());
        conf.set(ConfigurationKeys.JOB_NAME_KEY, JOB_NAME);

        new GobblinOutputCommitter().abortJob(Job.getInstance(conf), JobStatus.State.RUNNING);

        // Make sure all the staging dirs have been deleted
        for (Path stagingDir : this.stagingDirs) {
            Assert.assertTrue(!this.fs.exists(stagingDir));
        }
    }

    /**
     * Helper method to create a {@link WorkUnit}, set it's staging directories, and create the staging directories on the
     * local fs
     * @param workUnitName is the name of the {@link WorkUnit} to create
     * @return the {@link WorkUnit} that was created
     * @throws IOException
     */
    private WorkUnit createAndSetWorkUnit(String workUnitName) throws IOException {
        WorkUnit wu = WorkUnit.createEmpty();
        wu.setProp(ForkOperatorUtils.getPropertyNameForBranch(ConfigurationKeys.TASK_ID_KEY, 1, 0),
                System.nanoTime());

        Path wuStagingDir = new Path(OUTPUT_PATH,
                JOB_NAME + Path.SEPARATOR + workUnitName + Path.SEPARATOR + STAGING_DIR_NAME);
        wu.setProp(ForkOperatorUtils.getPropertyNameForBranch(ConfigurationKeys.WRITER_STAGING_DIR, 1, 0),
                wuStagingDir.toString());
        this.fs.mkdirs(wuStagingDir);
        this.stagingDirs.add(wuStagingDir);

        Path wuOutputDir = new Path(OUTPUT_PATH,
                JOB_NAME + Path.SEPARATOR + workUnitName + Path.SEPARATOR + OUTPUT_DIR_NAME);
        wu.setProp(ForkOperatorUtils.getPropertyNameForBranch(ConfigurationKeys.WRITER_OUTPUT_DIR, 1, 0),
                wuOutputDir.toString());
        this.fs.mkdirs(wuOutputDir);
        this.stagingDirs.add(wuOutputDir);
        return wu;
    }

    @AfterClass
    public void deleteWorkUnitFiles() throws IOException {
        this.fs.delete(OUTPUT_PATH, true);
    }
}