Example usage for org.apache.hadoop.io FloatWritable get

Introduction

In this page you can find the example usage for org.apache.hadoop.io FloatWritable get.

Prototype

public float get()

Source Link

Document

Return the value of this FloatWritable.

Usage

From source file:org.apache.mahout.cf.taste.hadoop.SlopeOneDiffsToAveragesReducer.java

License:Apache License

@Override
protected void reduce(ItemItemWritable key, Iterable<FloatWritable> values, Context context)
        throws IOException, InterruptedException {
    int count = 0;
    double total = 0.0;
    for (FloatWritable value : values) {
        total += value.get();
        count++;//from w w w . j  a  v  a 2  s .  c o m
    }
    context.write(key, new FloatWritable((float) (total / count)));
}

From source file:org.goldenorb.io.checkpoint.CheckPointDataTest.java

License:Apache License

/**
 * Tests the CheckPointDataInput class by reading several different types of Writables from the checkpoint.
 * Asserts that Writables that were written in are of the same value and type when reading in from HDFS.
 * //from  w  ww.j a  va 2  s.  c  o m
 * @throws Exception
 */
@Test
public void testCheckpointInput() throws Exception {

    int superStep = 0;
    int partition = 0;
    OrbConfiguration orbConf = new OrbConfiguration();
    orbConf.set("fs.default.name", "hdfs://localhost:" + cluster.getNameNodePort());
    orbConf.setJobNumber("0");
    orbConf.setFileOutputPath("test");

    CheckPointDataInput checkpointInput = new CheckPointDataInput(orbConf, superStep, partition);

    // Data is read on a FIFO basis

    IntWritable intInput = new IntWritable();
    intInput.readFields(checkpointInput);

    LongWritable longInput = new LongWritable();
    longInput.readFields(checkpointInput);

    Text textInput = new Text();
    textInput.readFields(checkpointInput);

    FloatWritable floatInput = new FloatWritable();
    floatInput.readFields(checkpointInput);

    checkpointInput.close();

    assertThat(checkpointInput, notNullValue());
    assertEquals(intInput.get(), 4);
    assertEquals(longInput.get(), 9223372036854775807L);
    assertEquals(textInput.toString(), "test");
    assertTrue(floatInput.get() == 3.14159F);
}

From source file:org.openflamingo.mapreduce.aggregator.FloatMaxAggregator.java

License:Apache License

@Override
public void aggregate(FloatWritable value) {
    float val = value.get();
    if (val > max) {
        max = val;
    }/*from   w  w w .j a  va  2 s .  c o  m*/
}

From source file:org.openflamingo.mapreduce.aggregator.FloatMaxAggregator.java

License:Apache License

@Override
public void setAggregatedValue(FloatWritable value) {
    max = value.get();
}

From source file:org.openflamingo.mapreduce.aggregator.FloatMinAggregator.java

License:Apache License

@Override
public void aggregate(FloatWritable value) {
    float val = value.get();
    if (val < min) {
        min = val;
    }/*from  w  w  w  . j  a  va2  s .  c  om*/
}

From source file:org.openflamingo.mapreduce.aggregator.FloatMinAggregator.java

License:Apache License

@Override
public void setAggregatedValue(FloatWritable value) {
    min = value.get();
}

From source file:org.openflamingo.mapreduce.aggregator.FloatOverwriteAggregator.java

License:Apache License

@Override
public void aggregate(FloatWritable value) {
    result = value.get();
}

From source file:org.openflamingo.mapreduce.aggregator.FloatOverwriteAggregator.java

License:Apache License

@Override
public void setAggregatedValue(FloatWritable value) {
    result = value.get();
}

From source file:org.openflamingo.mapreduce.aggregator.FloatProductAggregator.java

License:Apache License

@Override
public void aggregate(FloatWritable value) {
    product *= value.get();
}

From source file:org.openflamingo.mapreduce.aggregator.FloatProductAggregator.java

License:Apache License

@Override
public void setAggregatedValue(FloatWritable value) {
    product = value.get();
}