org.apache.nutch.util.NutchJob.java Source code

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Here is the source code for org.apache.nutch.util.NutchJob.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.nutch.util;

import org.apache.avro.util.Utf8;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Job;
import org.apache.nutch.metadata.Nutch;

import java.io.IOException;

/** A {@link Job} for Nutch jobs. */
public class NutchJob extends Job {

    public NutchJob(Configuration conf) throws IOException {
        super(conf);
        setJarByClass(this.getClass());
    }

    public NutchJob(Configuration conf, String jobName) throws IOException {
        super(conf, jobName);
        // prefix jobName with crawlId if not empty
        String crawlId = conf.get("storage.crawl.id");
        if (!StringUtils.isEmpty(crawlId)) {
            jobName = "[" + crawlId + "]" + jobName;
            setJobName(jobName);
        }
        setJarByClass(this.getClass());
    }

    @Override
    public boolean waitForCompletion(boolean verbose)
            throws IOException, InterruptedException, ClassNotFoundException {
        boolean succeeded = super.waitForCompletion(verbose);
        if (!succeeded) {
            // check if we want to fail whenever a job fails. (expert setting)
            if (getConfiguration().getBoolean("fail.on.job.failure", true)) {
                throw new RuntimeException("job failed: " + "name=" + getJobName() + ", jobid=" + getJobID());
            }
        }
        return succeeded;
    }

    public static boolean shouldProcess(CharSequence mark, Utf8 batchId) {
        if (mark == null) {
            return false;
        }
        boolean isAll = batchId.equals(Nutch.ALL_CRAWL_ID);
        if (!isAll && !mark.equals(batchId)) {
            return false;
        }
        return true;
    }
}