MapReduce 之流量汇总案例三+将统计结果将统计结果按照总流量正序排序（全排序）
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2022-06-29 21:55:51
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0）需求
根据需求1产生的结果再次对总流量进行排序。
1）数据准备
1363157985066 13726230503 00-FD-07-A4-72-B8:CMCC 120.196.100.82 i02.c.aliimg.com 24 27 2481 24681 200
1363157995052 13826544101 5C-0E-8B-C7-F1-E0:CMCC 120.197.40.4 4 0 264 0 200
1363157991076 13926435656 20-10-7A-28-CC-0A:CMCC 120.196.100.99 2 4 132 1512 200
1363154400022 13926251106 5C-0E-8B-8B-B1-50:CMCC 120.197.40.4 4 0 240 0 200
1363157993044 18211575961 94-71-AC-CD-E6-18:CMCC-EASY 120.196.100.99 iface.qiyi.com 视频网站 15 12 1527 2106 200
1363157995074 84138413 5C-0E-8B-8C-E8-20:7DaysInn 120.197.40.4 122.72.52.12 20 16 4116 1432 200
1363157993055 13560439658 C4-17-FE-BA-DE-D9:CMCC 120.196.100.99 18 15 1116 954 200
1363157995033 15920133257 5C-0E-8B-C7-BA-20:CMCC 120.197.40.4 sug.so.360.cn 信息安全 20 20 3156 2936 200
1363157983019 13719199419 68-A1-B7-03-07-B1:CMCC-EASY 120.196.100.82 4 0 240 0 200
1363157984041 13660577991 5C-0E-8B-92-5C-20:CMCC-EASY 120.197.40.4 s19.cnzz.com 站点统计 24 9 6960 690 200
1363157973098 15013685858 5C-0E-8B-C7-F7-90:CMCC 120.197.40.4 rank.ie.sogou.com 搜索引擎 28 27 3659 3538 200
1363157986029 15989002119 E8-99-C4-4E-93-E0:CMCC-EASY 120.196.100.99 www.umeng.com 站点统计 3 3 1938 180 200
1363157992093 13560439658 C4-17-FE-BA-DE-D9:CMCC 120.196.100.99 15 9 918 4938 200
1363157986041 13480253104 5C-0E-8B-C7-FC-80:CMCC-EASY 120.197.40.4 3 3 180 180 200
1363157984040 13602846565 5C-0E-8B-8B-B6-00:CMCC 120.197.40.4 2052.flash2-http.qq.com 综合门户 15 12 1938 2910 200
1363157995093 13922314466 00-FD-07-A2-EC-BA:CMCC 120.196.100.82 img.qfc.cn 12 12 3008 3720 200
1363157982040 13502468823 5C-0A-5B-6A-0B-D4:CMCC-EASY 120.196.100.99 y0.ifengimg.com 综合门户 57 102 7335 110349 200
1363157986072 18320173382 84-25-DB-4F-10-1A:CMCC-EASY 120.196.100.99 input.shouji.sogou.com 搜索引擎 21 18 9531 2412 200
1363157990043 13925057413 00-1F-64-E1-E6-9A:CMCC 120.196.100.55 t3.baidu.com 搜索引擎 69 63 11058 48243 200
1363157988072 13760778710 00-FD-07-A4-7B-08:CMCC 120.196.100.82 2 2 120 120 200
1363157985066 13726238888 00-FD-07-A4-72-B8:CMCC 120.196.100.82 i02.c.aliimg.com 24 27 2481 24681 200
1363157993055 13560436666 C4-17-FE-BA-DE-D9:CMCC 120.196.100.99 18 15 1116 954 2002）分析（缓冲区一开始在内存中，当100M满后，存入磁盘中先进行分区，再排序，hadoop只对key进行排序，并不会对value排序，因此要把流量作为key进行排序）
（1）把程序分两步走，第一步正常统计总流量，第二步再把结果进行排序
（2）context.write(总流量，手机号)
（3）FlowBean实现WritableComparable接口重写compareTo方法
3）代码实现
（1）FlowBean对象在在需求1基础上增加了比较功能
（2）编写mapper
package com.lzz.mapreduce.flowsort;
import java.io.IOException;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
public class FlowSortMapper extends Mapper<LongWritable, Text, FlowBean, Text>{
// 13502468823 7335 110349 117684
// 13560436666 3597 25635 29232
// 13560439658 2034 5892 7926
FlowBean k=new FlowBean();
Text v= new Text();
@Override
protected void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {
//1获取一行
String line=value.toString();
//2切割
String[] fields=line.split("\t");
//3封装对象
long upflow=Long.parseLong(fields[2]);
long downflow=Long.parseLong(fields[3]);
k.set(upflow,downflow);
v.set(fields[0]);
//4写出
context.write(k, v);
}
}
（3）编写reducer
package com.lzz.mapreduce.flowsort;
import java.io.IOException;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;
public class FlowSortReducer extends Reducer<FlowBean, Text, Text, FlowBean>{
@Override
protected void reduce(FlowBean key, Iterable<Text> values,Context context)
throws IOException, InterruptedException {
context.write(values.iterator().next(), key);
}
}
（4）编写driver
package com.lzz.mapreduce.flowsort;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
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.output.FileOutputFormat;
public class FlowSortDriver {
public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
Configuration configuration=new Configuration();
Job job=Job.getInstance(configuration);
job.setJarByClass(FlowSortDriver.class);
job.setMapperClass(FlowSortMapper.class);
job.setReducerClass(FlowSortReducer.class);
job.setMapOutputKeyClass(FlowBean.class);
job.setMapOutputValueClass(Text.class);
//设置分区
job.setPartitionerClass(FlowSortProvincePartitioner.class);
job.setNumReduceTasks(5);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(FlowBean.class);
FileInputFormat.setInputPaths(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));
boolean result=job.waitForCompletion(true);
System.exit(result?0:1);
}
}
结果