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package mobvista.dmp.common;
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.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.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.JavaType;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* author: houying
* date : 16-11-9
* desc :
*/
public class InterestDeviceDistinctMR extends CommonMapReduce {
public static class InstallDistinctMapper extends Mapper<LongWritable, Text, Text, NullWritable> {
private ObjectMapper objectMapper;
private JavaType javaType;
private Map<String, String> broadcast;
private Text outKey = new Text();
@Override
protected void setup(Context context) throws IOException, InterruptedException {
objectMapper = new ObjectMapper();
javaType = objectMapper.getTypeFactory().constructMapType(HashMap.class, String.class, String.class);
try {
// 将broadcast反序列化成map对象
Configuration conf = context.getConfiguration();
String tag = conf.get(Constants.MR_BROADCAST_STR);
broadcast = buildBroadcast(tag, conf, 0, 3);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String[] array = MRUtils.SPLITTER.split(value.toString(), -1);
if (array.length != 4) {
CommonMapReduce.setMetrics(context, "DMP", "column_num_error", 1);
return;
}
String deviceId = array[0];
if (checkDeviceId(deviceId)) {
String deviceType = array[1];
String platform = array[2];
JsonNode appList = objectMapper.readTree(array[3]);
List<Map<String, Object>> tagList = Lists.newArrayList();
for (JsonNode app : appList) {
Map<String, String> map = objectMapper.readValue(app, javaType);
String date = map.get("date");
String packageName = map.get("package_name");
if ("ios".equalsIgnoreCase(platform) && packageName.matches("^id[0-9]+$")) {
packageName = packageName.replace("id", "");
}
String tags = broadcast.get(packageName);
if (tags != null) {
Map<String, Object> tag = Maps.newHashMap();
tag.put("package_name", packageName);
tag.put("tag", objectMapper.readValue(tags, List.class));
tag.put("date", date);
tagList.add(tag);
}
}
if (tagList.size() > 0) {
outKey.set(MRUtils.JOINER.join(
deviceId,
deviceType,
platform,
objectMapper.writeValueAsString(tagList)
));
context.write(outKey, NullWritable.get());
}
}
}
}
public static class InstallDistinctReducer extends CommonReducer {
private ObjectMapper objectMapper = new ObjectMapper();
@Override
protected void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
List<Map<String, Object>> appList = Lists.newArrayList();
for (Text text : values) {
String[] array = MRUtils.SPLITTER.split(text.toString(), -1);
if (array.length != 3) {
continue;
}
Map<String, Object> app = Maps.newHashMap();
app.put("package_name", array[0]);
app.put("tag", objectMapper.readValue(array[1], List.class));
app.put("date", array[2]);
appList.add(app);
}
if (appList.size() > 0) {
out.set(MRUtils.JOINER.join(
key.toString(),
objectMapper.writeValueAsString(appList)
));
context.write(out, NullWritable.get());
}
}
}
public static void main(String[] args) throws Exception {
start(new InterestDeviceDistinctMR(args[args.length - 1], InstallDistinctMapper.class, null), args);
}
public InterestDeviceDistinctMR(String name, Class<? extends Mapper> mapperClass, Class<? extends Reducer> reducerClass) {
super(name, mapperClass, reducerClass);
}
@Override
protected void otherSetting(Job job, String[] args) throws Exception {
// 读取广播内容，用于map side join
Configuration conf = job.getConfiguration();
conf.set(Constants.MR_BROADCAST_STR, args[0]);
job.setNumReduceTasks(0);
job.setMapOutputValueClass(NullWritable.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(NullWritable.class);
job.setInputFormatClass(TextInputFormat.class);
}
@Override
protected void setOutputPath(Job job, String[] args) throws IOException {
FileOutputFormat.setOutputPath(job, new Path(args[2]));
FileOutputFormat.setCompressOutput(job, true);
FileOutputFormat.setOutputCompressorClass(job, GzipCodec.class);
}
@Override
protected void setInputPath(Job job, String[] args) throws IOException {
FileInputFormat.addInputPath(job, new Path(args[1]));
}
}