org.apache.kudu.mapreduce.HadoopTestingUtility.java Source code

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Here is the source code for org.apache.kudu.mapreduce.HadoopTestingUtility.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.kudu.mapreduce;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

/**
 * This class is analog to HBaseTestingUtility except that we only need it for the MR tests.
 */
public class HadoopTestingUtility {

    private static final Log LOG = LogFactory.getLog(HadoopTestingUtility.class);

    private File testDir;

    private Configuration conf = new Configuration();

    /**
     * System property key to get base test directory value
     */
    public static final String BASE_TEST_DIRECTORY_KEY = "test.build.data.basedirectory";

    /**
     * Default base directory for test output.
     */
    private static final String DEFAULT_BASE_TEST_DIRECTORY = "target/mr-data";

    public Configuration getConfiguration() {
        return this.conf;
    }

    /**
     * Sets up a temporary directory for the test to run in. Call cleanup() at the end of your
     * tests to remove it.
     * @param testName Will be used to build a part of the directory name for the test
     * @return Where the test is homed
     */
    public File setupAndGetTestDir(String testName, Configuration conf) {
        if (this.testDir != null) {
            return this.testDir;
        }
        Path testPath = new Path(getBaseTestDir(), testName + System.currentTimeMillis());
        this.testDir = new File(testPath.toString()).getAbsoluteFile();
        this.testDir.mkdirs();
        // Set this property so when mapreduce jobs run, they will use this as their home dir.
        System.setProperty("test.build.dir", this.testDir.toString());
        System.setProperty("hadoop.home.dir", this.testDir.toString());
        conf.set("hadoop.tmp.dir", this.testDir.toString() + "/mapred");

        LOG.info("Test configured to write to " + this.testDir);
        return this.testDir;
    }

    private Path getBaseTestDir() {
        String pathName = System.getProperty(BASE_TEST_DIRECTORY_KEY, DEFAULT_BASE_TEST_DIRECTORY);
        return new Path(pathName);
    }

    public void cleanup() throws IOException {
        FileSystem.closeAll();
        if (this.testDir != null) {
            delete(this.testDir);
        }
    }

    private void delete(File dir) throws IOException {
        if (dir == null || !dir.exists()) {
            return;
        }
        try {
            FileUtils.deleteDirectory(dir);
        } catch (IOException ex) {
            LOG.warn("Failed to delete " + dir.getAbsolutePath());
        }
    }
}