流量汇总案例

1.需求

现在我们采集到了一份用户访问流量的数据，我们需要从这份数据中统计出每个用户的流量数据。

部分测试数据如下：可以拷贝出去做测试

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    954 200
1363157993055   13560436646 C4-17-FE-BA-DE-D9:CMCC  120.196.100.99          18  15  1116    954 200
1363157984041   13660573991 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   15989102119 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   13480453104 5C-0E-8B-C7-FC-80:CMCC-EASY 120.197.40.4            3   3   180 180 200
1363157984040   13602246565 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   13922114466 00-FD-07-A2-EC-BA:CMCC  120.196.100.82  img.qfc.cn      12  12  3008    3720    200
1363157982040   13506468823 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   13925047413 00-1F-64-E1-E6-9A:CMCC  120.196.100.55  t3.baidu.com    搜索引擎    69  63  11058   48243   200
1363157988072   13760758710 00-FD-07-A4-7B-08:CMCC  120.196.100.82          2   2   120 120 200
1363157985066   13726228888 00-FD-07-A4-72-B8:CMCC  120.196.100.82  i02.c.aliimg.com        24  27  2481    24681   200
1363157993055   13560416666 C4-17-FE-BA-DE-D9:CMCC  120.196.100.99          18  15  1116    954 200
1363157993055   13560436766 C4-17-FE-BA-DE-D9:CMCC  120.196.100.99          18  15  1116    954 200

2.需求分析

Map阶段读取一行数据需要记录’上行流量’,‘下行流量’以及’总流量’,单个基本数据类型不方便保存,引入自定义对象保存，但需要序列化.

3.具体实现

3.1创建自定义对象

注意需要实现序列化，此处我们实现Writable接口，重写相关的方法

package com.sxt.mr.flow;import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;import org.apache.hadoop.io.Writable;
/*** 存储流量相关数据* @author 波波烤鸭**/
public class Flow implements Writable {// 上下流量private long upFlow;// 下行流量private long downFlow;// 总流量private long sumFlow;public long getUpFlow() {return upFlow;}public void setUpFlow(long upFlow) {this.upFlow = upFlow;}public long getDownFlow() {return downFlow;}public void setDownFlow(long downFlow) {this.downFlow = downFlow;}public Flow(long upFlow, long downFlow) {super();this.upFlow = upFlow;this.downFlow = downFlow;this.sumFlow = upFlow + downFlow;}/*** 无参构造方法必须要有 反射的时候需要用到*/public Flow() {super();}/*** 序列化方法*/@Overridepublic void write(DataOutput out) throws IOException {// TODO Auto-generated method stubout.writeLong(upFlow);out.writeLong(downFlow);out.writeLong(sumFlow);}@Overridepublic String toString() {return upFlow + "\t" + downFlow + "\t" + sumFlow;}/*** 反序列化 反序列化的顺序和序列化的顺序一致*/@Overridepublic void readFields(DataInput in) throws IOException {// TODO Auto-generated method stubupFlow = in.readLong();downFlow = in.readLong();sumFlow = in.readLong();}public long getSumFlow() {return sumFlow;}public void setSumFlow(long sumFlow) {this.sumFlow = sumFlow;}
}

3.2 自定义MapTask

注意输出的value就是我们自定义的类型

public class MyMapTask extends Mapper<LongWritable, Text, Text, Flow>{@Overrideprotected void map(LongWritable key, Text value, Context context)throws IOException, InterruptedException {// 将一行数据转换为StringString line = value.toString();// 切分字段String[] fields = line.split("\t");// 取出手机号String phoneNum = fields[1];// 取出上行流量下行流量long upFlow = Long.parseLong(fields[fields.length-3]);long downFlow = Long.parseLong(fields[fields.length-2]);Flow flow = new Flow(upFlow,downFlow);context.write(new Text(phoneNum), flow);}
}

3.3 自定义ReduceTask

public class MyReduceTask extends Reducer<Text, Flow, Text, Flow>{@Overrideprotected void reduce(Text key, Iterable<Flow> values, Context context)throws IOException, InterruptedException {long sum_upflow = 0;long sum_downflow = 0;for (Flow flow : values) {sum_upflow += flow.getUpFlow();sum_downflow += flow.getDownFlow();}Flow f = new Flow(sum_upflow,sum_downflow);// 必须重写Flow的toString方法context.write(new Text(key), f);}
}

3.4 启动类测试

采用本地模式运行

package com.sxt.mr.flow;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 FlowTest {public static void main(String[] args) throws Exception {Configuration conf = new Configuration(true);conf.set("mapreduce.framework.name", "local");// 输出到HDFS文件系统中// conf.set("fs.defaultFS", "hdfs://hadoop-node01:9000");// 输出到本地文件系统conf.set("fs.defaultFS", "file:///");Job job = Job.getInstance(conf);job.setJarByClass(FlowTest.class);// 指定本job要使用的map/reduce的工具类job.setMapperClass(MyMapTask.class);job.setReducerClass(MyReduceTask.class);// 指定mapper输出kv的类型job.setMapOutputKeyClass(Text.class);job.setMapOutputValueClass(Flow.class);job.setOutputKeyClass(Text.class);job.setOutputValueClass(Flow.class);// 指定job的原始文件输入目录// 6.设置输出输出类FileInputFormat.setInputPaths(job, new Path("c:/tools/bigdata/mr/flow/input/"));FileOutputFormat.setOutputPath(job, new Path("c:/tools/bigdata/mr/flow/output/"));//将job中配置的相关参数，以及job所用的jar包提交给yarn运行//job.submit();  waitForCompletion等待执行完成boolean flag = job.waitForCompletion(true);System.exit(flag?0:1);}
}

3.5 输出结果

4. 总结

本案例主要是演示了自定义对象在MapReduce任务中的使用，注意序列化！

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