Example usage for org.joda.time Duration Duration

Introduction

In this page you can find the example usage for org.joda.time Duration Duration.

Prototype

public Duration(ReadableInstant start, ReadableInstant end)

Source Link

Document

Creates a duration from the given interval endpoints.

Usage

From source file:com.facebook.stats.AbstractCompositeCounter.java

License:Apache License

/**
 * Updates the current composite counter so that it is up to date with the
 * current timestamp./*from  w  w w.j  a v a 2 s.  c  o m*/
 * <p/>
 * This should be called by any method that needs to have the most updated
 * view of the current set of counters.
 */
protected synchronized void trimIfNeeded() {
    Duration delta = new Duration(start, new DateTime()).minus(maxLength);

    if (delta.isLongerThan(Duration.ZERO)) {
        start = start.toDateTime().plus(delta);

        if (start.isAfter(end)) {
            end = start;
        }

        Iterator<C> iter = eventCounters.iterator();

        while (iter.hasNext()) {
            EventCounterIf<C> counter = iter.next();

            // trim any counter with an end up to and including start since our composite counter is
            // [start, ... and each counter is [..., end)
            if (!start.isBefore(counter.getEnd())) {
                iter.remove();
            } else {
                break;
            }
        }
    }
}

From source file:com.facebook.stats.AssociativeAggregationCounter.java

License:Apache License

@Override
public Duration getLength() {
    return new Duration(start, end);
}

From source file:com.facebook.stats.DecayCounter.java

License:Apache License

/**
 * @return counter value after computing exponential decay of the counter
 *         value//w  w w  . j  av a  2 s . c o  m
 */
@Override
public long getValue() {
    DateTime now = getNow();

    // don't start decay unless it's at least 1s after the decayStart
    if (now.isAfter(decayStart.toDateTime().plusSeconds(1))) {
        Duration elapsed = new Duration(decayStart, now);
        long millis = elapsed.getMillis();

        // compute total decay for millis / 1000 seconds
        double thisDecay = Math.pow(1.0 - decayRatePerSecond, (double) (millis / (double) 1000));

        return (long) (count.get() * thisDecay);
    } else {
        return count.get();
    }
}

From source file:com.facebook.stats.EventCounterImpl.java

License:Apache License

@Override

public Duration getLength() {
    return new Duration(start, end);
}

From source file:com.facebook.stats.EventRateImpl.java

License:Apache License

private Duration getPeriodSize() {
    // normalize by the time since server start
    ReadableDateTime now = new DateTime();
    Duration periodSize = new Duration(start, now);

    if (periodSize.isLongerThan(windowSize)) {
        return windowSize;
    } else {/*from  w  ww . j ava2s  .  c  om*/
        return periodSize;
    }
}

From source file:com.facebook.stats.MultiWindowGauge.java

License:Apache License

private long calcRate(EventCounterIf<GaugeCounter> counter) {
    long value = counter.getValue();
    ReadableDateTime end = counter.getEnd();
    ReadableDateTime start = counter.getStart();
    ReadableDateTime now = new DateTime();
    Duration duration = now.isBefore(end) ? new Duration(start, now) : // so far
            new Duration(start, end);
    long secs = duration.getStandardSeconds();
    return secs > 0 ? value / secs : value;
}

From source file:com.facebook.stats.MultiWindowGauge.java

License:Apache License

@Override
public long getAllTimeRate() {
    Duration sinceStart = new Duration(start, new DateTime());
    if (sinceStart.getStandardSeconds() == 0) {
        return 0;
    }/*from   ww  w  .  j  a  v a  2  s . c  o m*/
    return allTimeCounter.getValue() / sinceStart.getStandardSeconds();
}

From source file:com.facebook.stats.MultiWindowRate.java

License:Apache License

@Override
public long getAllTimeRate() {
    Duration sinceStart = new Duration(start, getNow());

    if (sinceStart.getStandardSeconds() == 0) {
        return 0;
    }/*from   w  w  w.  j  av a 2 s.c o m*/

    return allTimeCounter.getValue() / sinceStart.getStandardSeconds();
}

From source file:com.facebook.stats.mx.StatsUtil.java

License:Apache License

public static Duration extentOf(EventCounterIf counter1, EventCounterIf counter2) {
    ReadableDateTime start = counter1.getStart();
    ReadableDateTime end = counter1.getEnd();

    if (counter2.getStart().isBefore(start)) {
        start = counter2.getStart();/*ww  w .j a v a  2s.  co  m*/
    }

    if (counter2.getEnd().isAfter(end)) {
        end = counter2.getEnd();
    }

    return new Duration(start, end);
}

From source file:com.facebook.stats.mx.StatsUtil.java

License:Apache License

public static void main(String[] args) {
    DateTime start = new DateTime("2012-01-01T01:01:00.000Z");
    DateTime end = new DateTime("2012-01-01T01:02:00.000Z");
    Duration x = new Duration(start, end);
    System.err.println(x.getMillis());
}