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package mobvista.prd.datasource.table;
import com.google.common.collect.Interner;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import mobvista.dmp.util.MRUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.GzipCodec;
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;
import org.apache.hadoop.util.GenericOptionsParser;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2017/3/9 0009.
* desc：根据setting日志得到的app_id与pkg_name对应关系表join抓取到的app_id，app_name，platform，impression
* 如果一个pkg_name对应多个app_id，则取impression大的app_id
* 得到app_id，pkg_name，app_name
*/
public class MergeAppIDMR {
public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
Configuration conf = new Configuration();
String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
conf.set("file", otherArgs[2]);
Job job = Job.getInstance(conf, "MergeAppIDMR");
job.setJarByClass(MergeAppIDMR.class);
job.setMapperClass(MergeAppMapper.class);
job.setMapOutputKeyClass(Text.class);
job.setMapOutputValueClass(Text.class);
job.setReducerClass(MergeAppReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(NullWritable.class);
FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
public static class MergeAppMapper extends Mapper<LongWritable, Text, Text, Text> {
Map<String, String> packageMap = Maps.newHashMap();
Text outKey = new Text();
Text outValue = new Text();
public void setup(Context context) throws IOException, InterruptedException {
//读取CalcPackageDictMR的结果，放入Map中
String path = context.getConfiguration().get("file");
FileSystem fileSystem = FileSystem.get(URI.create(path), context.getConfiguration());
BufferedReader reader = new BufferedReader(new InputStreamReader(fileSystem.open(new Path(path))));
String readLine = "";
while ((readLine = reader.readLine()) != null) {
String[] arr = readLine.split("\t", -1);
packageMap.put(arr[2], arr[0] + "\t" + arr[1] + "\t" + arr[3]);
}
reader.close();
}
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
try {
String line = value.toString();
if (line.contains("\t")) {
String[] fields = line.split("\t", -1);
String appName = packageMap.get(fields[0]);
if (appName == null) {
return;
}
if (fields[1] == null || fields[1].equals("") || fields[1].length() == 0) {
return;
}
outKey.set(fields[0]);
outValue.set(fields[1] + "\t" + appName);
context.write(outKey, outValue);
} else if (line.contains(",")) {
String[] fields = line.split(",", -1);
String appName = packageMap.get(fields[0]); //app_id
if (appName == null) {
return;
}
if (fields[1] == null || fields[1].equals("") || fields[1].length() == 0) {
return;
}
outKey.set(fields[1]);
outValue.set(fields[0] + "\t" + appName); //app_id,platform,app_name,impression
context.write(outKey, outValue);
}
} catch (Exception e) {
return;
}
}
}
public static class MergeAppReducer extends Reducer<Text, Text, Text, NullWritable> {
Text outKey = new Text();
public void reduce (Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
List<String> list = Lists.newArrayList();
for (Text val : values) {
list.add(val.toString());
}
String out = "";
if (list.size() > 1) {
int max = 0;
for (String line : list) {
String[] arr = line.split("\t",-1);
String num = arr[3].replace(",","");
if (Integer.parseInt(num) > max) {
max = Integer.parseInt(num);
out = arr[0] + "\t" + arr[2];
}
}
} else {
String[] arr = list.get(0).split("\t",-1);
out = arr[0] + "\t" + arr[2];
}
String[] fields = out.split("\t",-1);
outKey.set(MRUtils.JOINER.join(fields[0],key,fields[1])); //app_id,pkg_name,app_name
context.write(outKey, NullWritable.get());
}
}
}