org.apache.jena.tdbloader3.AbstractMiniMRClusterTest.java Source code

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Here is the source code for org.apache.jena.tdbloader3.AbstractMiniMRClusterTest.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.jena.tdbloader3;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.MiniMRCluster;

public abstract class AbstractMiniMRClusterTest {

    protected static MiniDFSCluster dfsCluster;
    protected static MiniMRCluster mrCluster;
    protected static FileSystem fs;
    protected static final int numNodes = 2;
    protected static final String config = "target/hadoop-localhost-test.xml";

    public static void startCluster() throws IOException {
        FileUtils.deleteDirectory(new File("build/test"));

        Configuration configuration = new Configuration();
        // this is to avoid problems with permissions in the ./build directory used by tests... none of these attempts works.
        // configuration.setBoolean("dfs.permissions", false) ;
        // configuration.set("dfs.datanode.data.dir.perm", "755") ;
        // "dfs.umask=022"
        System.setProperty("hadoop.log.dir", "build/test/logs");
        dfsCluster = new MiniDFSCluster(configuration, numNodes, true, null);
        mrCluster = new MiniMRCluster(numNodes, dfsCluster.getFileSystem().getUri().toString(), 1);

        // Generate Hadoop configuration
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        mrCluster.createJobConf().writeXml(baos);
        String cfg = baos.toString();
        cfg = cfg.replace("<name>dfs.permissions</name><value>true</value>",
                "<name>dfs.permissions</name><value>false</value>");
        FileOutputStream out = new FileOutputStream(config);
        out.write(cfg.getBytes());
        out.close();

        // Copy testing data onto (H)DFS
        fs = dfsCluster.getFileSystem();
        fs.copyFromLocalFile(new Path("src/test/resources"), new Path("src/test/resources"));
    }

    public static void stopCluster() throws IOException {
        if (dfsCluster != null) {
            dfsCluster.shutdown();
            dfsCluster = null;
        }
        if (mrCluster != null) {
            mrCluster.shutdown();
            mrCluster = null;
        }
    }

}