org.apache.hadoop.mapred.gridmix.test.system.GridmixJobStory.java Source code

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Here is the source code for org.apache.hadoop.mapred.gridmix.test.system.GridmixJobStory.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.hadoop.mapred.gridmix.test.system;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.tools.rumen.ZombieJobProducer;
import org.apache.hadoop.tools.rumen.ZombieJob;
import org.apache.hadoop.conf.Configuration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Build the job stories with a given trace file. 
 */
public class GridmixJobStory {
    private static Log LOG = LogFactory.getLog(GridmixJobStory.class);
    private Path path;
    private Map<JobID, ZombieJob> zombieJobs;
    private Configuration conf;

    public GridmixJobStory(Path path, Configuration conf) {
        this.path = path;
        this.conf = conf;
        try {
            zombieJobs = buildJobStories();
            if (zombieJobs == null) {
                throw new NullPointerException("No jobs found in a " + " given trace file.");
            }
        } catch (IOException ioe) {
            LOG.warn("Error:" + ioe.getMessage());
        } catch (NullPointerException npe) {
            LOG.warn("Error:" + npe.getMessage());
        }
    }

    /**
     * Get the zombie jobs as a map.
     * @return the zombie jobs map.
     */
    public Map<JobID, ZombieJob> getZombieJobs() {
        return zombieJobs;
    }

    /**
     * Get the zombie job of a given job id.
     * @param jobId - gridmix job id.
     * @return - the zombie job object.
     */
    public ZombieJob getZombieJob(JobID jobId) {
        return zombieJobs.get(jobId);
    }

    private Map<JobID, ZombieJob> buildJobStories() throws IOException {
        ZombieJobProducer zjp = new ZombieJobProducer(path, null, conf);
        Map<JobID, ZombieJob> hm = new HashMap<JobID, ZombieJob>();
        ZombieJob zj = zjp.getNextJob();
        while (zj != null) {
            hm.put(zj.getJobID(), zj);
            zj = zjp.getNextJob();
        }
        if (hm.size() == 0) {
            return null;
        } else {
            return hm;
        }
    }
}