Java Histogram.getSnapshot方法代碼示例

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
/**
 * Build an {@link InfluxDbMeasurement} from a histogram.
 */
@VisibleForTesting InfluxDbMeasurement fromHistogram(final String metricName, final Histogram h, final long timestamp) {
  final Snapshot snapshot = h.getSnapshot();
  final DropwizardMeasurement measurement = parser.parse(metricName);

  final Map<String, String> tags = new HashMap<>(baseTags);
  tags.putAll(measurement.tags());

  return new InfluxDbMeasurement.Builder(measurement.name(), timestamp)
    .putTags(tags)
    .putField("count", snapshot.size())
    .putField("min", snapshot.getMin())
    .putField("max", snapshot.getMax())
    .putField("mean", snapshot.getMean())
    .putField("std-dev", snapshot.getStdDev())
    .putField("50-percentile", snapshot.getMedian())
    .putField("75-percentile", snapshot.get75thPercentile())
    .putField("95-percentile", snapshot.get95thPercentile())
    .putField("99-percentile", snapshot.get99thPercentile())
    .putField("999-percentile", snapshot.get999thPercentile())
    .putField("run-count", h.getCount())
    .build();
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
@Override
public void serialize(JsonHistogram jsonHistogram,
                      JsonGenerator json,
                      SerializerProvider provider) throws IOException {
    json.writeStartObject();
    json.writeStringField("name", jsonHistogram.name());
    json.writeObjectField(timestampFieldname, jsonHistogram.timestampAsDate());
    Histogram histogram = jsonHistogram.value();

    final Snapshot snapshot = histogram.getSnapshot();
    json.writeNumberField("count", histogram.getCount());
    json.writeNumberField("max", snapshot.getMax());
    json.writeNumberField("mean", snapshot.getMean());
    json.writeNumberField("min", snapshot.getMin());
    json.writeNumberField("p50", snapshot.getMedian());
    json.writeNumberField("p75", snapshot.get75thPercentile());
    json.writeNumberField("p95", snapshot.get95thPercentile());
    json.writeNumberField("p98", snapshot.get98thPercentile());
    json.writeNumberField("p99", snapshot.get99thPercentile());
    json.writeNumberField("p999", snapshot.get999thPercentile());

    json.writeNumberField("stddev", snapshot.getStdDev());
    addOneOpsMetadata(json);
    json.writeEndObject();
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
/** */
private void reportHistogram(String timestamp, String name, Histogram histogram) {
    final Snapshot snapshot = histogram.getSnapshot();

    report(timestamp,
        name,
        "count,max,mean,min,stddev,p50,p75,p90,p95,p98,p99,p999",
        "%d,%d,%f,%d,%f,%f,%f,%f,%f,%f,%f,%f",
        histogram.getCount(),
        snapshot.getMax(),
        snapshot.getMean(),
        snapshot.getMin(),
        snapshot.getStdDev(),
        snapshot.getMedian(),
        snapshot.get75thPercentile(),
        snapshot.getValue(0.9), // Add 90-th percentile to report.
        snapshot.get95thPercentile(),
        snapshot.get98thPercentile(),
        snapshot.get99thPercentile(),
        snapshot.get999thPercentile());
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
private void reportHistogram(JsonGenerator jsonGenerator, Entry<String, Histogram> entry, String timestampString) {
	try {
		writeStartMetric(entry.getKey(), jsonGenerator, timestampString);
		jsonGenerator.writeStartObject();
		final Histogram histogram = entry.getValue();
		final Snapshot snapshot = histogram.getSnapshot();
		jsonGenerator.writeNumberField("count", histogram.getCount());
		jsonGenerator.writeNumberField("min", convertDuration(snapshot.getMin()));
		jsonGenerator.writeNumberField("max", convertDuration(snapshot.getMax()));
		jsonGenerator.writeNumberField("mean", convertDuration(snapshot.getMean()));
		jsonGenerator.writeNumberField("stddev", convertDuration(snapshot.getStdDev()));
		jsonGenerator.writeNumberField("median", convertDuration(snapshot.getMedian()));
		jsonGenerator.writeNumberField("75th percentile", convertDuration(snapshot.get75thPercentile()));
		jsonGenerator.writeNumberField("95th percentile", convertDuration(snapshot.get95thPercentile()));
		jsonGenerator.writeNumberField("98th percentile", convertDuration(snapshot.get98thPercentile()));
		jsonGenerator.writeNumberField("99th percentile", convertDuration(snapshot.get99thPercentile()));
		jsonGenerator.writeNumberField("999th percentile", convertDuration(snapshot.get999thPercentile()));

		jsonGenerator.writeEndObject();
		writeEndMetric(jsonGenerator);

	} catch (IOException ioe) {
		LOGGER.error("Exception writing metrics to Elasticsearch index: " + ioe.toString());
	}

}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
/**
 * The {@link Snapshot} values of {@link Histogram} are reported as {@link StatisticSet} raw. In other words, the
 * conversion using the duration factor does NOT apply.
 * <p>
 * Please note, the reported values submitted only if they show some data (greater than zero) in order to:
 * <p>
 * 1. save some money
 * 2. prevent com.amazonaws.services.cloudwatch.model.InvalidParameterValueException if empty {@link Snapshot}
 * is submitted
 * <p>
 * If {@link Builder#withZeroValuesSubmission()} is {@code true}, then all values will be submitted
 *
 * @see Histogram#getSnapshot
 */
private void processHistogram(final String metricName, final Histogram histogram, final List<MetricDatum> metricData) {
    final Snapshot snapshot = histogram.getSnapshot();

    if (builder.withZeroValuesSubmission || snapshot.size() > 0) {
        for (final Percentile percentile : builder.percentiles) {
            final double value = snapshot.getValue(percentile.getQuantile());
            stageMetricDatum(true, metricName, value, StandardUnit.None, percentile.getDesc(), metricData);
        }
    }

    // prevent empty snapshot from causing InvalidParameterValueException
    if (snapshot.size() > 0) {
        stageMetricDatum(builder.withArithmeticMean, metricName, snapshot.getMean(), StandardUnit.None, DIMENSION_SNAPSHOT_MEAN, metricData);
        stageMetricDatum(builder.withStdDev, metricName, snapshot.getStdDev(), StandardUnit.None, DIMENSION_SNAPSHOT_STD_DEV, metricData);
        stageMetricDatumWithRawSnapshot(builder.withStatisticSet, metricName, snapshot, StandardUnit.None, metricData);
    }
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
private void reportHistogram(String name, Histogram histogram) throws IOException {
    final Snapshot snapshot = histogram.getSnapshot();
    statsdClient.send(prefix(name, "count"),
            format(histogram.getCount()),
            StatsdClient.StatType.GAUGE);
    statsdClient.send(prefix(name, "max"),
            format(snapshot.getMax()),
            StatsdClient.StatType.TIMER);
    statsdClient.send(prefix(name, "mean"),
            format(snapshot.getMean()),
            StatsdClient.StatType.TIMER);

    statsdClient.send(prefix(name, "p95"),
            format(snapshot.get95thPercentile()),
            StatsdClient.StatType.TIMER);

}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
public BasicMetricsContext(
	final String stepId, final IoType ioType, final IntSupplier actualConcurrencyGauge,
	final int driverCount, final int concurrency, final int thresholdConcurrency,
	final SizeInBytes itemDataSize, final int updateIntervalSec, final boolean stdOutColorFlag,
	final boolean avgPersistFlag, final boolean sumPersistFlag,
	final boolean perfDbResultsFileFlag
) {
	this.stepId = stepId;
	this.ioType = ioType;
	this.actualConcurrencyGauge = actualConcurrencyGauge;
	this.driverCount = driverCount;
	this.concurrency = concurrency;
	this.thresholdConcurrency = thresholdConcurrency > 0 ?
		thresholdConcurrency : Integer.MAX_VALUE;
	this.itemDataSize = itemDataSize;

	this.stdOutColorFlag = stdOutColorFlag;
	this.avgPersistFlag = avgPersistFlag;
	this.sumPersistFlag = sumPersistFlag;
	this.perfDbResultsFileFlag = perfDbResultsFileFlag;
	this.outputPeriodMillis = TimeUnit.SECONDS.toMillis(updateIntervalSec);

	respLatency = new Histogram(new SlidingWindowReservoir(DEFAULT_RESERVOIR_SIZE));
	respLatSnapshot = respLatency.getSnapshot();
	respLatencySum = new LongAdder();
	reqDuration = new Histogram(new SlidingWindowReservoir(DEFAULT_RESERVOIR_SIZE));
	reqDurSnapshot = reqDuration.getSnapshot();
	actualConcurrency = new Histogram(new SlidingWindowReservoir(DEFAULT_RESERVOIR_SIZE));
	actualConcurrencySnapshot = actualConcurrency.getSnapshot();
	reqDurationSum = new LongAdder();
	throughputSuccess = new CustomMeter(clock, updateIntervalSec);
	throughputFail = new CustomMeter(clock, updateIntervalSec);
	reqBytes = new CustomMeter(clock, updateIntervalSec);
	ts = System.nanoTime();
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
private void reportHistogram(String name, Histogram histogram, long timestamp, List<String> tags)
    throws IOException {
  final Snapshot snapshot = histogram.getSnapshot();

  if(histogram instanceof HistImplContainer) {
    HistImpl take = ((HistImplContainer)histogram).getHistImpl().copyAndReset();
    LOG.debug("Adding Circonus Histogram to report: " + name);
    request.addHistogram(new CirconusHistogram(
          name, take, timestamp, host, tags));
    if(suppress_bad_analytics) return;
  }

  if (expansions.contains(Expansion.COUNT)) {
    request.addGauge(new CirconusGauge(
        appendExpansionSuffix(name, Expansion.COUNT),
        histogram.getCount(),
        timestamp,
        host,
        tags));
  }

  Number[] values = { snapshot.getMax(), snapshot.getMean(), snapshot.getMin(), snapshot.getStdDev(),
      snapshot.getMedian(), snapshot.get75thPercentile(), snapshot.get95thPercentile(), snapshot.get98thPercentile(),
      snapshot.get99thPercentile(), snapshot.get999thPercentile() };

  for (int i = 0; i < STATS_EXPANSIONS.length; i++) {
    if (expansions.contains(STATS_EXPANSIONS[i])) {
      request.addGauge(new CirconusGauge(
          appendExpansionSuffix(name, STATS_EXPANSIONS[i]),
          toNumber(values[i]),
          timestamp,
          host,
          tags));
    }
  }
}
 

import com.codahale.metrics.Histogram; //導入方法依賴的package包/類
private String formatHistogram(String name, Histogram histogram, long timestamp) {
    final Snapshot snapshot = histogram.getSnapshot();

    StringBuilder outputBuilder = new StringBuilder();

    outputBuilder.append(formatLine(MetricNamingUtil.join(name, "count"), histogram.getCount(), timestamp));
    outputBuilder.append(formatSamplingSnapshot(name, snapshot, timestamp, false));

    return outputBuilder.toString();
}