Example usage for org.apache.hadoop.mapreduce Job setReducerClass

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce Job setReducerClass.

Prototype

public void setReducerClass(Class<? extends Reducer> cls) throws IllegalStateException 

Source Link

Document

Set the Reducer for the job.

Usage

From source file:com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.api.user.UserScheduler.java

License:Open Source License

@Override
public int run(String[] args) throws Exception {
    try {/*from   ww w. j  a v  a  2s.  c o m*/
        CommonVariables.initMapReduce(this.getConf(), args);// ? MAP REDUCE
        CommonVariables.hBaseHelper = new HBaseHelper(this.getConf());

        // ??
        String matcherRegex = CommonVariables.getParameterValue(Argument.MapperInputFormatRegex);
        String hdfsInputPath = CommonVariables.getParameterValue(Argument.InputPath);
        String hdfsOutputPath = CommonVariables.getParameterValue(Argument.OutputPath);

        // ???
        if (StringUtils.isNotBlank(matcherRegex)) {
            CommonVariables.MAPPER_INPUT_FORMAT_REGEX = Pattern.compile(matcherRegex);
        }

        Path inputPath = new Path(hdfsInputPath);
        Path outputPath = new Path(hdfsOutputPath);

        Job job = Job.getInstance(this.getConf(), this.getClass().getName());
        job.setJarByClass(this.getClass());

        job.setMapperClass(UserMapper.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(Text.class);

        job.setReducerClass(UserReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        FileInputFormat.addInputPath(job, inputPath);
        FileOutputFormat.setOutputPath(job, outputPath);

        FileSystem fileSystem = FileSystem.get(new URI(outputPath.toString()), this.getConf());
        if (fileSystem.exists(outputPath)) {
            fileSystem.delete(outputPath, true);
        }

        // 
        boolean state = job.waitForCompletion(true);
        if (!state) {
            throw new Exception("MapReduce task execute failed.........");
        }

        return 0;
    } catch (Exception e) {
        e.printStackTrace();
        return 1;
    }
}

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From source file:com.marklogic.mapreduce.examples.HelloWorld.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();

    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
    Job job = Job.getInstance(conf, "hello world");
    job.setJarByClass(HelloWorld.class);

    // Map related configuration
    job.setInputFormatClass(DocumentInputFormat.class);
    job.setMapperClass(MyMapper.class);
    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(Text.class);

    // Reduce related configuration
    job.setReducerClass(MyReducer.class);
    job.setOutputFormatClass(ContentOutputFormat.class);
    job.setOutputKeyClass(DocumentURI.class);
    job.setOutputValueClass(Text.class);

    conf = job.getConfiguration();/* ww w  .j av a2s .c  o m*/
    conf.addResource("marklogic-hello-world.xml");

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCount.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 2) {
        System.err.println("Usage: LinkCount configFile outputDir");
        System.exit(2);/*w w  w  . j a v  a  2  s.c  om*/
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count");
    job.setJarByClass(LinkCount.class);
    job.setInputFormatClass(ValueInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(TextOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);
    conf.setClass(MarkLogicConstants.INPUT_VALUE_CLASS, Text.class, Writable.class);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCountCooccurrences.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 2) {
        System.err.println("Usage: LinkCountCooccurrences configFile outputDir");
        System.exit(2);/*from   ww w. java 2s  .c o  m*/
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count cooccurrences");
    job.setJarByClass(LinkCountCooccurrences.class);
    job.setInputFormatClass(KeyValueInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(TextOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);
    conf.setClass(MarkLogicConstants.INPUT_KEY_CLASS, Text.class, Writable.class);
    conf.setClass(MarkLogicConstants.INPUT_VALUE_CLASS, Text.class, Writable.class);
    conf.setClass(MarkLogicConstants.INPUT_LEXICON_FUNCTION_CLASS, HrefTitleMap.class,
            ElemAttrValueCooccurrences.class);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCountHDFS.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 2) {
        System.err.println("Usage: LinkCountHDFS inputDir outputDir");
        System.exit(2);/* w  w  w . j  a  v a  2s  .c  om*/
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count hdfs");
    job.setJarByClass(LinkCountHDFS.class);
    job.setInputFormatClass(HDFSInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);

    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(TextOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    HDFSInputFormat.setInputPaths(job, new Path(otherArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCountInDoc.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 1) {
        System.err.println("Usage: LinkCountInDoc configFile");
        System.exit(2);/* w w  w  . j a v a2s .c o m*/
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count in doc");
    job.setJarByClass(LinkCountInDoc.class);
    job.setInputFormatClass(NodeInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(NodeOutputFormat.class);
    job.setOutputKeyClass(NodePath.class);
    job.setOutputValueClass(MarkLogicNode.class);

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCountInProperty.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 1) {
        System.err.println("Usage: LinkCountInProperty configFile");
        System.exit(2);//from   w w w. ja v  a 2 s. c o  m
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count in property");
    job.setJarByClass(LinkCountInProperty.class);
    job.setInputFormatClass(ValueInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(PropertyOutputFormat.class);
    job.setOutputKeyClass(DocumentURI.class);
    job.setOutputValueClass(MarkLogicNode.class);

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);
    conf.setClass(MarkLogicConstants.INPUT_VALUE_CLASS, Text.class, Writable.class);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.examples.LinkCountValue.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 2) {
        System.err.println("Usage: LinkCountValue configFile outputDir");
        System.exit(2);// www. j  a  v a2  s.  co  m
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "link count value");
    job.setJarByClass(LinkCountValue.class);
    job.setInputFormatClass(ValueInputFormat.class);
    job.setMapperClass(RefMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputFormatClass(TextOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);
    conf.setClass(MarkLogicConstants.INPUT_VALUE_CLASS, Text.class, Writable.class);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:com.marklogic.mapreduce.test.CustomQuery.java

License:Apache License

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    if (args.length < 1) {
        System.err.println("Usage: CustomQuery configFile");
        System.exit(2);//from   w  w w  .j  a  v a2s  . c o m
    }
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    Job job = Job.getInstance(conf, "custom query");
    job.setJarByClass(CustomQuery.class);

    job.setInputFormatClass(NodeInputFormat.class);
    job.setMapperClass(QueryMapper.class);
    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(Text.class);

    job.setReducerClass(QueryReducer.class);
    job.setOutputFormatClass(KeyValueOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);

    conf = job.getConfiguration();
    conf.addResource(otherArgs[0]);

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

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From source file:com.mb.saas.bi.job.WordCountJob.java

License:Apache License

public static boolean runHadoopMapReduceJob() throws Exception {
    System.setProperty("HADOOP_USER_NAME", "hadoop");

    File jarFile = UploadResource.createTempJar("bin");
    ClassLoader classLoader = UploadResource.getClassLoader();
    Thread.currentThread().setContextClassLoader(classLoader);

    Configuration conf = new Configuration();

    conf.set("fs.defaultFS", "hdfs://mbcluster/");
    conf.set("dfs.nameservices", "mbcluster");
    conf.set("dfs.ha.namenodes.mbcluster", "ns1,ns2");
    conf.set("dfs.namenode.rpc-address.mbcluster.ns1", "master:4001");
    conf.set("dfs.namenode.rpc-address.mbcluster.ns2", "backup:4001");
    conf.set("dfs.client.failover.proxy.provider.mbcluster",
            "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider");

    Job job = new Job(conf, "word count");
    job.setJarByClass(WordCountJob.class);
    job.setMapperClass(TokenizerMapper.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);

    if (jarFile != null)
        ((JobConf) job.getConfiguration()).setJar(jarFile.getAbsolutePath());

    boolean isMapReduceJarSetted = false;
    String hadoopMapReduceJar = "F:/henry_projects/mbHiveAnalyzer/t.jar";
    File file = new File(hadoopMapReduceJar);
    if (file.exists()) {
        ((JobConf) job.getConfiguration()).setJar(hadoopMapReduceJar);
        isMapReduceJarSetted = true;/*from   w w  w . ja  v  a 2s .co m*/
    }

    if (!isMapReduceJarSetted && jarFile != null)
        ((JobConf) job.getConfiguration()).setJar(jarFile.getAbsolutePath());

    job.setNumReduceTasks(1);
    FileInputFormat.addInputPath(job, new Path("/input/wordcount.txt"));
    FileOutputFormat.setOutputPath(job, new Path("/output/001"));
    System.exit(job.waitForCompletion(true) ? 0 : 1);
    return true;
}

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