/**
* Copyright 2012 - CommonCrawl Foundation
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
**/
package org.commoncrawl.mapred.pipelineV3.domainmeta.linkstats;
import java.io.IOException;
import java.text.NumberFormat;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.commoncrawl.mapred.pipelineV3.CrawlPipelineStep;
import org.commoncrawl.mapred.pipelineV3.CrawlPipelineTask;
import org.commoncrawl.mapred.pipelineV3.domainmeta.DomainMetadataTask;
import org.commoncrawl.util.JobBuilder;
import org.commoncrawl.util.TextBytes;
import com.google.common.collect.ImmutableList;
/**
*
* @author rana
*
*/
public class CountInLinksStep extends CrawlPipelineStep {
public static final String OUTPUT_DIR_NAME = "inlinkCounts";
private static final Log LOG = LogFactory.getLog(CountInLinksStep.class);
private static final NumberFormat NUMBER_FORMAT = NumberFormat.getInstance();
static {
NUMBER_FORMAT.setMinimumIntegerDigits(5);
NUMBER_FORMAT.setGroupingUsed(false);
}
public CountInLinksStep(CrawlPipelineTask task) throws IOException {
super(task, "Count Inlinks Step", OUTPUT_DIR_NAME);
}
@Override
public Log getLogger() {
return LOG;
}
@Override
public void runStep(Path outputPathLocation) throws IOException {
LOG.info("Task Identity Path is:" + getTaskIdentityPath());
LOG.info("Temp Path is:" + outputPathLocation);
ImmutableList<Path> paths = new ImmutableList.Builder<Path>().addAll(
((DomainMetadataTask) getTask()).getRestrictedMergeDBDataPaths()).build();
JobConf job = new JobBuilder(getPipelineStepName() + " - Phase 1", getConf()).inputIsSeqFile().inputs(paths)
.mapperKeyValue(TextBytes.class, TextBytes.class).outputKeyValue(TextBytes.class, TextBytes.class).mapper(
LinkStatusToInlinkingDomainMapper.class).reducer(UniqueIncomingRootDomainCounter.class, false).numReducers(
10).outputIsSeqFile().output(outputPathLocation).build();
LOG.info("Running Step 1");
JobClient.runJob(job);
LOG.info("Done Running Step 1");
}
}