| /* |
| * 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.domain; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandles; |
| import java.net.URL; |
| import java.text.SimpleDateFormat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| import org.apache.nutch.crawl.CrawlDatum; |
| import org.apache.nutch.util.NutchConfiguration; |
| import org.apache.nutch.util.TimingUtil; |
| import org.apache.nutch.util.URLUtil; |
| |
| /** |
| * Extracts some very basic statistics about domains from the crawldb |
| */ |
| public class DomainStatistics extends Configured implements Tool { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private static final Text FETCHED_TEXT = new Text("FETCHED"); |
| private static final Text NOT_FETCHED_TEXT = new Text("NOT_FETCHED"); |
| |
| public static enum MyCounter { |
| FETCHED, NOT_FETCHED, EMPTY_RESULT |
| }; |
| |
| private static final int MODE_HOST = 1; |
| private static final int MODE_DOMAIN = 2; |
| private static final int MODE_SUFFIX = 3; |
| private static final int MODE_TLD = 4; |
| |
| public int run(String[] args) throws Exception { |
| if (args.length < 3) { |
| System.err.println("Usage: DomainStatistics inputDirs outDir mode [numOfReducer]"); |
| |
| System.err.println("\tinputDirs\tComma separated list of crawldb input directories"); |
| System.err.println("\t\t\tE.g.: crawl/crawldb/"); |
| |
| System.err.println("\toutDir\t\tOutput directory where results should be dumped"); |
| |
| System.err.println("\tmode\t\tSet statistics gathering mode"); |
| System.err.println("\t\t\t\thost\tGather statistics by host"); |
| System.err.println("\t\t\t\tdomain\tGather statistics by domain"); |
| System.err.println("\t\t\t\tsuffix\tGather statistics by suffix"); |
| System.err.println("\t\t\t\ttld\tGather statistics by top level directory"); |
| |
| System.err.println("\t[numOfReducers]\tOptional number of reduce jobs to use. Defaults to 1."); |
| |
| return 1; |
| } |
| String inputDir = args[0]; |
| String outputDir = args[1]; |
| int numOfReducers = 1; |
| |
| if (args.length > 3) { |
| numOfReducers = Integer.parseInt(args[3]); |
| } |
| |
| SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); |
| long start = System.currentTimeMillis(); |
| LOG.info("DomainStatistics: starting at " + sdf.format(start)); |
| |
| int mode = 0; |
| String jobName = "DomainStatistics"; |
| if (args[2].equals("host")) { |
| jobName = "Host statistics"; |
| mode = MODE_HOST; |
| } else if (args[2].equals("domain")) { |
| jobName = "Domain statistics"; |
| mode = MODE_DOMAIN; |
| } else if (args[2].equals("suffix")) { |
| jobName = "Suffix statistics"; |
| mode = MODE_SUFFIX; |
| } else if (args[2].equals("tld")) { |
| jobName = "TLD statistics"; |
| mode = MODE_TLD; |
| } |
| |
| Configuration conf = getConf(); |
| conf.setInt("domain.statistics.mode", mode); |
| conf.setBoolean("mapreduce.fileoutputcommitter.marksuccessfuljobs", false); |
| |
| Job job = Job.getInstance(conf, jobName); |
| job.setJarByClass(DomainStatistics.class); |
| |
| String[] inputDirsSpecs = inputDir.split(","); |
| for (int i = 0; i < inputDirsSpecs.length; i++) { |
| File completeInputPath = new File(new File(inputDirsSpecs[i]), "current"); |
| FileInputFormat.addInputPath(job, new Path(completeInputPath.toString())); |
| } |
| |
| job.setInputFormatClass(SequenceFileInputFormat.class); |
| FileOutputFormat.setOutputPath(job, new Path(outputDir)); |
| job.setOutputFormatClass(TextOutputFormat.class); |
| |
| job.setMapOutputKeyClass(Text.class); |
| job.setMapOutputValueClass(LongWritable.class); |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(LongWritable.class); |
| |
| job.setMapperClass(DomainStatisticsMapper.class); |
| job.setReducerClass(DomainStatisticsReducer.class); |
| job.setCombinerClass(DomainStatisticsCombiner.class); |
| job.setNumReduceTasks(numOfReducers); |
| |
| try { |
| boolean success = job.waitForCompletion(true); |
| if (!success) { |
| String message = "Injector job did not succeed, job status: " |
| + job.getStatus().getState() + ", reason: " |
| + job.getStatus().getFailureInfo(); |
| LOG.error(message); |
| // throw exception so that calling routine can exit with error |
| throw new RuntimeException(message); |
| } |
| } catch (IOException | InterruptedException | ClassNotFoundException e) { |
| LOG.error(jobName + " job failed", e); |
| throw e; |
| } |
| |
| long end = System.currentTimeMillis(); |
| LOG.info("DomainStatistics: finished at " + sdf.format(end) + ", elapsed: " |
| + TimingUtil.elapsedTime(start, end)); |
| return 0; |
| } |
| |
| static class DomainStatisticsMapper extends |
| Mapper<Text, CrawlDatum, Text, LongWritable> { |
| int mode = 0; |
| |
| public void setup(Context context) { |
| mode = context.getConfiguration().getInt("domain.statistics.mode", |
| MODE_DOMAIN); |
| } |
| |
| public void map(Text urlText, CrawlDatum datum, Context context) |
| throws IOException, InterruptedException { |
| |
| if (datum.getStatus() == CrawlDatum.STATUS_DB_FETCHED |
| || datum.getStatus() == CrawlDatum.STATUS_DB_NOTMODIFIED) { |
| |
| try { |
| URL url = new URL(urlText.toString()); |
| String out = null; |
| switch (mode) { |
| case MODE_HOST: |
| out = url.getHost(); |
| break; |
| case MODE_DOMAIN: |
| out = URLUtil.getDomainName(url); |
| break; |
| case MODE_SUFFIX: |
| out = URLUtil.getDomainSuffix(url).getDomain(); |
| break; |
| case MODE_TLD: |
| out = URLUtil.getTopLevelDomainName(url); |
| break; |
| } |
| if (out.trim().equals("")) { |
| LOG.info("url : " + url); |
| context.getCounter(MyCounter.EMPTY_RESULT).increment(1); |
| } |
| |
| context.write(new Text(out), new LongWritable(1)); |
| } catch (Exception ex) { |
| } |
| |
| context.getCounter(MyCounter.FETCHED).increment(1); |
| context.write(FETCHED_TEXT, new LongWritable(1)); |
| } else { |
| context.getCounter(MyCounter.NOT_FETCHED).increment(1); |
| context.write(NOT_FETCHED_TEXT, new LongWritable(1)); |
| } |
| } |
| } |
| |
| static class DomainStatisticsReducer extends |
| Reducer<Text, LongWritable, LongWritable, Text> { |
| public void reduce(Text key, Iterable<LongWritable> values, Context context) |
| throws IOException, InterruptedException { |
| long total = 0; |
| |
| for (LongWritable val : values) { |
| total += val.get(); |
| } |
| |
| context.write(new LongWritable(total), key); |
| } |
| } |
| |
| public static class DomainStatisticsCombiner extends |
| Reducer<Text, LongWritable, Text, LongWritable> { |
| public void reduce(Text key, Iterable<LongWritable> values, Context context) |
| throws IOException, InterruptedException { |
| long total = 0; |
| |
| for (LongWritable val : values) { |
| total += val.get(); |
| } |
| context.write(key, new LongWritable(total)); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| ToolRunner.run(NutchConfiguration.create(), new DomainStatistics(), args); |
| } |
| |
| } |