io.dataapps.chlorine.hadoop.AbstractPipeline.java Source code

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Here is the source code for io.dataapps.chlorine.hadoop.AbstractPipeline.java

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/*
 * Copyright 2016, DataApps Corporation (http://dataApps.io) .
 * 
 * Licensed 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 io.dataapps.chlorine.hadoop;

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.mapreduce.Job;

public abstract class AbstractPipeline {
    static final Log LOG = LogFactory.getLog(AbstractPipeline.class);

    protected boolean runJobToCompletion(Job j) {

        LOG.info("***********Run job: " + j.getJobName());
        try {
            if (!waitForCompletion(j, true)) {
                LOG.error("Job " + j.getJobName() + " failed.");
                return false;
            }
        } catch (Exception e) {
            LOG.error(e);
            return false;
        }
        LOG.info("Job " + j.getJobName() + " successful.");
        return true;
    }

    private synchronized boolean waitForCompletion(Job j, boolean verbose)
            throws IOException, InterruptedException, ClassNotFoundException {
        j.submit();
        while (!j.isComplete()) {
            try {
                wait(5000);
            } catch (InterruptedException ie) {
            }
        }
        return j.isSuccessful();
    }

    abstract public void run();
}