org.apache.whirr.service.hadoop.integration.AbstractHadoopServiceTest.java Source code

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Here is the source code for org.apache.whirr.service.hadoop.integration.AbstractHadoopServiceTest.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.whirr.service.hadoop.integration;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.lib.LongSumReducer;
import org.apache.hadoop.mapred.lib.TokenCountMapper;
import org.apache.whirr.TestConstants;
import org.junit.AfterClass;
import org.junit.Test;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertNull;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

/**
 * Subclasses should implement @BeforeClass static void setUp()
 * to set the controller.
 */
public abstract class AbstractHadoopServiceTest {

    protected static HadoopServiceController controller;

    @AfterClass
    public static void tearDown() throws Exception {
        controller.shutdown();
    }

    public AbstractHadoopServiceTest() {
        super();
    }

    @Test(timeout = TestConstants.ITEST_TIMEOUT)
    public void test() throws Exception {
        Configuration conf = controller.getConfiguration();
        JobConf job = new JobConf(conf, HadoopServiceTest.class);

        FileSystem fs = FileSystem.get(conf);

        OutputStream os = fs.create(new Path("input"));
        Writer wr = new OutputStreamWriter(os);
        wr.write("b a\n");
        wr.close();

        job.setMapperClass(TokenCountMapper.class);
        job.setReducerClass(LongSumReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(LongWritable.class);
        FileInputFormat.setInputPaths(job, new Path("input"));
        FileOutputFormat.setOutputPath(job, new Path("output"));

        JobClient.runJob(job);

        FSDataInputStream in = fs.open(new Path("output/part-00000"));
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        assertEquals("a\t1", reader.readLine());
        assertEquals("b\t1", reader.readLine());
        assertNull(reader.readLine());
        reader.close();

    }

    @Test(timeout = TestConstants.ITEST_TIMEOUT)
    public void testExistsTemporaryFolderAndHiveWarehouse() throws Exception {
        Configuration conf = controller.getConfiguration();
        FileSystem fs = FileSystem.get(conf);

        assertThat(fs.exists(new Path("/tmp")), is(true));
        assertThat(fs.exists(new Path("/user/hive/warehouse")), is(true));
    }

}