org.springframework.data.hadoop.mapreduce.StreamingTest.java Source code

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Here is the source code for org.springframework.data.hadoop.mapreduce.StreamingTest.java

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/*
 * Copyright 2011 the original author or authors.
 * 
 * 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.
 */
package org.springframework.data.hadoop.mapreduce;

import javax.annotation.Resource;

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.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.data.hadoop.TestUtils;
import org.springframework.data.hadoop.util.VersionUtils;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.junit.Assert.*;
import static org.junit.Assume.assumeTrue;

/**
 * Test running a basic streaming example
 * 
 * $HADOOP_HOME/bin/hadoop  jar $HADOOP_HOME/hadoop-streaming.jar \
 *    -D mapreduce.job.reduces=2 \
 *   -input myInputDirs \
 *   -output myOutputDir \
 *   -mapper /bin/cat \
 *   -reducer /bin/wc 
 *
 * 
 * @author Costin Leau
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/org/springframework/data/hadoop/streaming/basic.xml")
public class StreamingTest {

    @Autowired
    private ApplicationContext ctx;
    @Resource(name = "ns-stream-job")
    private Job job;

    {
        TestUtils.hackHadoopStagingOnWin();
    }

    @Test
    public void testStreaming() throws Exception {
        cleanOutput(ctx);

        assertTrue(ctx.isPrototype("vanilla-stream-job"));
        Job job = ctx.getBean("vanilla-stream-job", Job.class);
        job.waitForCompletion(true);

        // equivalent
        //    Configuration cfg = ctx.getBean(Configuration.class);
        //   StreamJob stream = new StreamJob();
        //   stream.setConf(cfg);
        //   String[] args = new String[] { "-verbose", "-input", "test", "-output", "output", "-mapper",
        //            "E:\\tools\\nix\\unxutils\\cat", "-reducer", "E:\\tools\\nix\\unxutils\\wc" };
        //   stream.run(args);
        //

    }

    @Test
    public void testStreamingNS() throws Exception {
        cleanOutput(ctx);
        Job job = ctx.getBean("ns-stream-job", Job.class);
        job.waitForCompletion(true);
    }

    private void cleanOutput(ApplicationContext ctx) throws Exception {
        FileSystem fs = FileSystem.get(ctx.getBean(Configuration.class));
        fs.copyFromLocalFile(new Path("../build.gradle"), new Path("test/"));
        fs.delete(new Path("output"), true);
    }

    @Test
    public void testJobProperties() throws Exception {
        assertNotNull(job);
        Configuration cfg = job.getConfiguration();
        assertNotNull(cfg);

        assertEquals("chasing", cfg.get("star"));
        assertEquals("captain eo", cfg.get("return"));
        assertEquals("last", cfg.get("train"));
        assertEquals("the dream", cfg.get("dancing"));
        assertEquals("in the mirror", cfg.get("tears"));
        assertEquals("eo", cfg.get("captain"));
    }
}