package org.apache.pig.test.pigmix.mapreduce;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Map;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.KeyValueTextInputFormat;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.TextInputFormat;
import org.apache.hadoop.mapred.jobcontrol.Job;
import org.apache.hadoop.mapred.jobcontrol.JobControl;
import org.apache.hadoop.mapred.lib.IdentityMapper;
import org.apache.pig.test.pigmix.mapreduce.Library;
public class L3 {
public static class ReadPageViews extends MapReduceBase
implements Mapper<LongWritable, Text, Text, Text> {
public void map(
LongWritable k,
Text val,
OutputCollector<Text, Text> oc,
Reporter reporter) throws IOException {
List<Text> fields = Library.splitLine(val, '');
// Prepend an index to the value so we know which file
// it came from.
Text outVal = new Text("1" + fields.get(6).toString());
oc.collect(fields.get(0), outVal);
}
}
public static class ReadUsers extends MapReduceBase
implements Mapper<LongWritable, Text, Text, Text> {
public void map(
LongWritable k,
Text val,
OutputCollector<Text, Text> oc,
Reporter reporter) throws IOException {
List<Text> fields = Library.splitLine(val, '');
// Prepend an index to the value so we know which file
// it came from.
Text outVal = new Text("2");
oc.collect(fields.get(0), outVal);
}
}
public static class Join extends MapReduceBase
implements Reducer<Text, Text, Text, Text> {
public void reduce(
Text key,
Iterator<Text> iter,
OutputCollector<Text, Text> oc,
Reporter reporter) throws IOException {
// For each value, figure out which file it's from and store it
// accordingly.
List<String> first = new ArrayList<String>();
List<String> second = new ArrayList<String>();
while (iter.hasNext()) {
Text t = iter.next();
String value = t.toString();
if (value.charAt(0) == '1') first.add(value.substring(1));
else second.add(value.substring(1));
reporter.setStatus("OK");
}
reporter.setStatus("OK");
if (first.size() == 0 || second.size() == 0) return;
// Do the cross product, and calculate the sum
Double sum = 0.0;
for (String s1 : first) {
for (String s2 : second) {
try {
sum += Double.valueOf(s1);
} catch (NumberFormatException nfe) {
}
}
}
oc.collect(null, new Text(key.toString() + "" + sum.toString()));
}
}
public static void main(String[] args) throws IOException {
if (args.length!=3) {
System.out.println("Parameters: inputDir outputDir parallel");
System.exit(1);
}
String inputDir = args[0];
String outputDir = args[1];
String parallel = args[2];
String user = System.getProperty("user.name");
JobConf lp = new JobConf(L3.class);
lp.setJobName("L3 Load Page Views");
lp.setInputFormat(TextInputFormat.class);
lp.setOutputKeyClass(Text.class);
lp.setOutputValueClass(Text.class);
lp.setMapperClass(ReadPageViews.class);
Properties props = System.getProperties();
for (Map.Entry<Object,Object> entry : props.entrySet()) {
lp.set((String)entry.getKey(), (String)entry.getValue());
}
FileInputFormat.addInputPath(lp, new Path(inputDir + "/page_views"));
FileOutputFormat.setOutputPath(lp, new Path(outputDir + "/indexed_pages_3"));
lp.setNumReduceTasks(0);
Job loadPages = new Job(lp);
JobConf lu = new JobConf(L3.class);
lu.setJobName("L3 Load Users");
lu.setInputFormat(TextInputFormat.class);
lu.setOutputKeyClass(Text.class);
lu.setOutputValueClass(Text.class);
lu.setMapperClass(ReadUsers.class);
props = System.getProperties();
for (Map.Entry<Object,Object> entry : props.entrySet()) {
lu.set((String)entry.getKey(), (String)entry.getValue());
}
FileInputFormat.addInputPath(lu, new Path(inputDir + "/users"));
FileOutputFormat.setOutputPath(lu, new Path(outputDir + "/indexed_users_3"));
lu.setNumReduceTasks(0);
Job loadUsers = new Job(lu);
JobConf join = new JobConf(L3.class);
join.setJobName("L3 Join Users and Pages");
join.setInputFormat(KeyValueTextInputFormat.class);
join.setOutputKeyClass(Text.class);
join.setOutputValueClass(Text.class);
join.setMapperClass(IdentityMapper.class);
join.setReducerClass(Join.class);
props = System.getProperties();
for (Map.Entry<Object,Object> entry : props.entrySet()) {
join.set((String)entry.getKey(), (String)entry.getValue());
}
FileInputFormat.addInputPath(join, new Path(outputDir + "/indexed_pages_3"));
FileInputFormat.addInputPath(join, new Path(outputDir + "/indexed_users_3"));
FileOutputFormat.setOutputPath(join, new Path(outputDir + "/L3out"));
join.setNumReduceTasks(Integer.parseInt(parallel));
Job joinJob = new Job(join);
joinJob.addDependingJob(loadPages);
joinJob.addDependingJob(loadUsers);
JobControl jc = new JobControl("L3 join");
jc.addJob(loadPages);
jc.addJob(loadUsers);
jc.addJob(joinJob);
new Thread(jc).start();
int i = 0;
while(!jc.allFinished()){
ArrayList<Job> failures = jc.getFailedJobs();
if (failures != null && failures.size() > 0) {
for (Job failure : failures) {
System.err.println(failure.getMessage());
}
break;
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {}
if (i % 10000 == 0) {
System.out.println("Running jobs");
ArrayList<Job> running = jc.getRunningJobs();
if (running != null && running.size() > 0) {
for (Job r : running) {
System.out.println(r.getJobName());
}
}
System.out.println("Ready jobs");
ArrayList<Job> ready = jc.getReadyJobs();
if (ready != null && ready.size() > 0) {
for (Job r : ready) {
System.out.println(r.getJobName());
}
}
System.out.println("Waiting jobs");
ArrayList<Job> waiting = jc.getWaitingJobs();
if (waiting != null && waiting.size() > 0) {
for (Job r : ready) {
System.out.println(r.getJobName());
}
}
System.out.println("Successful jobs");
ArrayList<Job> success = jc.getSuccessfulJobs();
if (success != null && success.size() > 0) {
for (Job r : ready) {
System.out.println(r.getJobName());
}
}
}
i++;
}
ArrayList<Job> failures = jc.getFailedJobs();
if (failures != null && failures.size() > 0) {
for (Job failure : failures) {
System.err.println(failure.getMessage());
}
}
jc.stop();
}
}