/**
* 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.crunch.examples;
import java.io.Serializable;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.crunch.CombineFn;
import org.apache.crunch.DoFn;
import org.apache.crunch.Emitter;
import org.apache.crunch.PCollection;
import org.apache.crunch.PTable;
import org.apache.crunch.Pair;
import org.apache.crunch.Pipeline;
import org.apache.crunch.PipelineResult;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.types.writable.Writables;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.util.GenericOptionsParser;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
@SuppressWarnings("serial")
public class TotalBytesByIP extends Configured implements Tool, Serializable {
static enum COUNTERS {
NO_MATCH,
CORRUPT_SIZE
}
static final String logRegex = "^([\\w.]+) (\\S+) (\\S+) \\[([\\w:/]+\\s[+\\-]\\d{4})\\] \"(.+?)\" (\\d{3}) (\\d+) \"([^\"]+)\" \"([^\"]+)\"";
public int run(String[] args) throws Exception {
if (args.length != 2) {
System.err.println();
System.err.println("Two and only two arguments are accepted.");
System.err.println("Usage: " + this.getClass().getName() + " [generic options] input output");
System.err.println();
GenericOptionsParser.printGenericCommandUsage(System.err);
return 1;
}
// Create an object to coordinate pipeline creation and execution.
Pipeline pipeline = new MRPipeline(TotalBytesByIP.class, getConf());
// Reference a given text file as a collection of Strings.
PCollection<String> lines = pipeline.readTextFile(args[0]);
// Combiner used for summing up response size
CombineFn<String, Long> longSumCombiner = CombineFn.SUM_LONGS();
// Table of (ip, sum(response size))
PTable<String, Long> ipAddrResponseSize = lines
.parallelDo(extractIPResponseSize, Writables.tableOf(Writables.strings(), Writables.longs())).groupByKey()
.combineValues(longSumCombiner);
pipeline.writeTextFile(ipAddrResponseSize, args[1]);
// Execute the pipeline as a MapReduce.
PipelineResult result = pipeline.done();
return result.succeeded() ? 0 : 1;
}
// Function to parse apache log records
// Given a standard apache log line, extract the ip address and
// request size. Outputs the ip and response size.
//
// Input: 55.1.3.2 ...... 200 512 ....
// Output: (55.1.3.2, 512)
DoFn<String, Pair<String, Long>> extractIPResponseSize = new DoFn<String, Pair<String, Long>>() {
transient Pattern pattern;
public void initialize() {
pattern = Pattern.compile(logRegex);
}
public void process(String line, Emitter<Pair<String, Long>> emitter) {
Matcher matcher = pattern.matcher(line);
if (matcher.matches()) {
try {
Long requestSize = Long.parseLong(matcher.group(7));
String remoteAddr = matcher.group(1);
emitter.emit(Pair.of(remoteAddr, requestSize));
} catch (NumberFormatException e) {
// corrupt line, we should increment counter
}
}
}
};
public static void main(String[] args) throws Exception {
int result = ToolRunner.run(new Configuration(), new TotalBytesByIP(), args);
System.exit(result);
}
}