Example usage for org.apache.commons.math.util MathUtils gcd

Introduction

In this page you can find the example usage for org.apache.commons.math.util MathUtils gcd.

Prototype

public static long gcd(final long p, final long q) 

Source Link

Document

Gets the greatest common divisor of the absolute value of two numbers, using the "binary gcd" method which avoids division and modulo operations.

Usage

From source file:org.apache.flink.streaming.api.invokable.operator.co.CoBatchReduceInvokable.java

public CoBatchReduceInvokable(CoReduceFunction<IN1, IN2, OUT> coReducer, long batchSize1, long batchSize2,
        long slideSize1, long slideSize2) {
    super(coReducer);
    this.coReducer = coReducer;
    this.batchSize1 = batchSize1;
    this.batchSize2 = batchSize2;
    this.slideSize1 = slideSize1;
    this.slideSize2 = slideSize2;
    this.granularity1 = (int) MathUtils.gcd(batchSize1, slideSize1);
    this.granularity2 = (int) MathUtils.gcd(batchSize2, slideSize2);
    this.batchPerSlide1 = slideSize1 / granularity1;
    this.batchPerSlide2 = slideSize2 / granularity2;
    this.numberOfBatches1 = batchSize1 / granularity1;
    this.numberOfBatches2 = batchSize2 / granularity2;
}

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From source file:org.apache.flink.streaming.api.invokable.operator.WindowReduceInvokable.java

public WindowReduceInvokable(GroupReduceFunction<IN, OUT> reduceFunction, long windowSize, long slideInterval) {
    super(reduceFunction);
    this.reducer = reduceFunction;
    this.windowSize = windowSize;
    this.slideSize = slideInterval;
    this.granularity = MathUtils.gcd(windowSize, slideSize);
    this.listSize = (int) granularity;
}

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From source file:org.apache.flink.streaming.api.invokable.operator.WindowReduceInvokable.java

public WindowReduceInvokable(ReduceFunction<IN> reduceFunction, long windowSize, long slideInterval) {
    super(reduceFunction);
    this.windowSize = windowSize;
    this.slideSize = slideInterval;
    this.granularity = MathUtils.gcd(windowSize, slideSize);
    this.listSize = (int) granularity;
}

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From source file:org.apache.hadoop.metrics2.impl.MetricsSystemImpl.java

private synchronized void configureSinks() {
    sinkConfigs = config.getInstanceConfigs(SINK_KEY);
    int confPeriod = 0;
    for (Entry<String, MetricsConfig> entry : sinkConfigs.entrySet()) {
        MetricsConfig conf = entry.getValue();
        int sinkPeriod = conf.getInt(PERIOD_KEY, PERIOD_DEFAULT);
        confPeriod = confPeriod == 0 ? sinkPeriod : MathUtils.gcd(confPeriod, sinkPeriod);
        String sinkName = entry.getKey();
        LOG.debug("sink " + sinkName + " config:\n" + conf);
        try {/*from  w ww .j a va  2s .  co m*/
            MetricsSinkAdapter sa = newSink(sinkName, conf.getString(DESC_KEY, sinkName), conf);
            // we allow config of later registered sinks
            if (sa != null) {
                sa.start();
                sinks.put(sinkName, sa);
            }
        } catch (Exception e) {
            LOG.warn("Error creating " + sinkName, e);
        }
    }
    period = confPeriod > 0 ? confPeriod : config.getInt(PERIOD_KEY, PERIOD_DEFAULT);
}

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From source file:org.netxilia.functions.MathFunctions.java

/**
 * Returns the greatest common divisor of one or more integers.
 * /*from  w  w  w  . j a  v  a  2 s  .c  om*/
 * @return
 */
public long GCD(Iterator<Long> values) {
    if (!values.hasNext()) {
        return 1;
    }
    long result = values.next();
    while (values.hasNext()) {
        result = MathUtils.gcd(result, values.next());
    }
    return result;
}

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