今天照着《hadoop实战》写了个小例子,解析tomcat日志统计各个浏览器的访问次数
- package com.ice.stat;
- import java.io.IOException;
- import java.util.regex.Matcher;
- import java.util.regex.Pattern;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.io.IntWritable;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.mapreduce.Job;
- import org.apache.hadoop.mapreduce.Mapper;
- import org.apache.hadoop.mapreduce.Reducer;
- import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
- import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
- public class TomcatLog{
- static class TomcatMapper extends Mapper<Object, Text, Text, IntWritable> {
- private static final IntWritable one = new IntWritable(1);
- private static Pattern pattern = Pattern.compile("([^,]*),([^,]*),([^,]*),([^,]*),([^,]*),([^,]*),([^,]*),([^,]*),(.*)");
- protected void map(Object key, Text value,
- Context context) throws IOException ,InterruptedException {
- String line = value.toString();
- System.out.println(line);
- Matcher m = pattern.matcher(line);
- if(m.matches()){
- String agent = m.group(9).toLowerCase();
- if(agent.contains("chrome")){
- agent = "chrome";
- }else if(agent.contains("safari")){
- agent = "safari";
- }else if(agent.contains("firefox")){
- agent = "firefox";
- }else{
- agent = "other";
- }
- Text t = new Text(agent);
- context.write(t, one);
- }
- };
- }
- static class TomcatReducer extends Reducer<Text, IntWritable, Text, IntWritable>{
- protected void reduce(Text key, java.lang.Iterable<IntWritable> value, org.apache.hadoop.mapreduce.Reducer<Text,IntWritable,Text,IntWritable>.Context context) throws IOException ,InterruptedException {
- int count = 0;
- for(IntWritable v : value){
- count = count + v.get();
- }
- context.write(key, new IntWritable(count));
- };
- }
- public static void main(String[] args) throws Exception {
- if(args.length != 2){
- System.err.println("参数个数不对");
- System.exit(-1);
- }
- Job job = new Job();
- job.setJarByClass(TomcatLog.class);
- FileInputFormat.addInputPath(job, new Path(args[0]));
- FileOutputFormat.setOutputPath(job, new Path(args[1]));
- job.setMapperClass(TomcatMapper.class);
- job.setReducerClass(TomcatReducer.class);
- job.setOutputKeyClass(Text.class);
- job.setOutputValueClass(IntWritable.class);
- System.exit(job.waitForCompletion(true) ? 0 : 1);
- }
- }
日志样例:
- 172.16.2.12,-,-,[06/Sep/2011:10:03:13 +0800],GET /icestat/jpivot/toolbar/sort-asc-up.png HTTP/1.1,200,336,-,Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2)
- 172.16.2.12,-,-,[06/Sep/2011:09:48:17 +0800],GET /icestat/ HTTP/1.1,200,171,http://10.65.11.241:8080/icestat/,Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.43 Safari/534.24
把日志放入hdfs
- hadoop fs -put icestat_access_log.2011-09-06.txt icestat_access_log.2011-09-06.txt
分析日志
- hadoop jar tomcatLog.jar icestat_access_log.2011-09-06.txt output6
查看输出
- [root@xxx hadoop-0.20.2]# hadoop fs -cat output6/part-r-00000
- 11/09/06 00:18:54 WARN conf.Configuration: DEPRECATED: hadoop-site.xml found in the classpath. Usage of hadoop-site.xml is deprecated. Instead use core-site.xml, mapred-site.xml and hdfs-site.xml to override properties of core-default.xml, mapred-default.xml and hdfs-default.xml respectively
- 11/09/06 00:18:54 WARN fs.FileSystem: "xxx :9000" is a deprecated filesystem name. Use "hdfs://xxx :9000/" instead.
- 11/09/06 00:18:54 WARN fs.FileSystem: "xxx :9000" is a deprecated filesystem name. Use "hdfs://xxx :9000/" instead.
- 11/09/06 00:18:54 WARN fs.FileSystem: "xxx :9000" is a deprecated filesystem name. Use "hdfs://xxx :9000/" instead.
- chrome 58
- firefox 23
- other 49
- safari 5
http://dsbjoe.iteye.com/blog/1166698