Example usage for org.apache.hadoop.mapred MapRunnable run

Introduction

In this page you can find the example usage for org.apache.hadoop.mapred MapRunnable run.

Prototype

void run(RecordReader<K1, V1> input, OutputCollector<K2, V2> output, Reporter reporter) throws IOException;

Source Link

Document

Start mapping input <key, value> pairs.

Usage

From source file:org.apache.tez.mapreduce.processor.map.MapProcessor.java

License:Apache License

void runOldMapper(final JobConf job, final MRTaskReporter reporter, final MRInputLegacy input,
        final KeyValueWriter output) throws IOException, InterruptedException {

    // Initialize input in-line since it sets parameters which may be used by the processor.
    // Done only for MRInput.
    // TODO use new method in MRInput to get required info
    //input.initialize(job, master);

    InputSplit inputSplit = input.getOldInputSplit();

    updateJobWithSplit(job, inputSplit);

    RecordReader in = new OldRecordReader(input);

    OutputCollector collector = new OldOutputCollector(output);

    MapRunnable runner = (MapRunnable) ReflectionUtils.newInstance(job.getMapRunnerClass(), job);

    runner.run(in, collector, (Reporter) reporter);

    // Set progress to 1.0f if there was no exception,
    reporter.setProgress(1.0f);/*  w  w w .  java2 s. com*/
    // start the sort phase only if there are reducers
    this.statusUpdate();
}

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