org.apache.airavata.gfac.hadoop.provider.utils.HadoopUtils.java Source code

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Here is the source code for org.apache.airavata.gfac.hadoop.provider.utils.HadoopUtils.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.airavata.gfac.hadoop.provider.utils;

import org.apache.airavata.gfac.core.context.JobExecutionContext;
import org.apache.airavata.gfac.core.context.MessageContext;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Collection;

public class HadoopUtils {
    public static Configuration createHadoopConfiguration(JobExecutionContext jobExecutionContext,
            boolean isWhirrBasedDeployment, File hadoopConfigDir) throws FileNotFoundException {
        MessageContext inMessageContext = jobExecutionContext.getInMessageContext();
        Configuration hadoopConf = new Configuration();

        if (isWhirrBasedDeployment) {
            hadoopConf.addResource(
                    new FileInputStream(new File((String) inMessageContext.getParameter("HADOOP_SITE_XML"))));
        } else {
            readHadoopClusterConfigurationFromDirectory(hadoopConfigDir, hadoopConf);
        }

        return hadoopConf;
    }

    private static void readHadoopClusterConfigurationFromDirectory(File localHadoopConfigurationDirectory,
            Configuration hadoopConf) throws FileNotFoundException {
        Collection hadoopConfigurationFiles = FileUtils.listFiles(localHadoopConfigurationDirectory, null, false);
        for (Object f : hadoopConfigurationFiles) {
            hadoopConf.addResource(new FileInputStream((File) f));
        }
    }
}