Examples with Histogram com.codahale.metrics.Histogram used on opensource projects

Example 41 with Histogram

use of com.codahale.metrics.Histogram in project ddf by codice.

the class SourceMetricsImpl method updateMetric.

public void updateMetric(String sourceId, String name, int incrementAmount) {
    LOGGER.debug("sourceId = {},   name = {}", sourceId, name);
    if (StringUtils.isBlank(sourceId) || StringUtils.isBlank(name)) {
        return;
    }
    String mapKey = sourceId + "." + name;
    SourceMetric sourceMetric = metrics.get(mapKey);
    if (sourceMetric == null) {
        LOGGER.debug("sourceMetric is null for {} - creating metric now", mapKey);
        // Loop through list of all sources until find the sourceId whose metric is being
        // updated
        boolean created = createMetric(catalogProviders, sourceId);
        if (!created) {
            createMetric(federatedSources, sourceId);
        }
        sourceMetric = metrics.get(mapKey);
    }
    // If this metric already exists, then just update its MBean
    if (sourceMetric != null) {
        LOGGER.debug("CASE 1: Metric already exists for {}", mapKey);
        if (sourceMetric.isHistogram()) {
            Histogram metric = (Histogram) sourceMetric.getMetric();
            LOGGER.debug("Updating histogram metric {} by amount of {}", name, incrementAmount);
            metric.update(incrementAmount);
        } else {
            Meter metric = (Meter) sourceMetric.getMetric();
            LOGGER.debug("Updating metric {} by amount of {}", name, incrementAmount);
            metric.mark(incrementAmount);
        }
        return;
    }
}

Example 42 with Histogram

use of com.codahale.metrics.Histogram in project sling by apache.

the class MetricWebConsolePlugin method addHistogramDetails.

private void addHistogramDetails(PrintWriter pw, SortedMap<String, Histogram> histograms) {
    if (histograms.isEmpty()) {
        return;
    }
    pw.println("<br>");
    pw.println("<div class='table'>");
    pw.println("<div class='ui-widget-header ui-corner-top buttonGroup'>Histograms</div>");
    pw.println("<table class='nicetable' id='data-histograms'>");
    pw.println("<thead>");
    pw.println("<tr>");
    pw.println("<th class='header'>Name</th>");
    pw.println("<th class='header'>Count</th>");
    pw.println("<th class='header'>50%</th>");
    pw.println("<th class='header'>Min</th>");
    pw.println("<th class='header'>Max</th>");
    pw.println("<th class='header'>Mean</th>");
    pw.println("<th class='header'>StdDev</th>");
    pw.println("<th class='header'>75%</th>");
    pw.println("<th class='header'>95%</th>");
    pw.println("<th class='header'>98%</th>");
    pw.println("<th class='header'>99%</th>");
    pw.println("<th class='header'>999%</th>");
    pw.println("<th>Duration Unit</th>");
    pw.println("</tr>");
    pw.println("</thead>");
    pw.println("<tbody>");
    String rowClass = "odd";
    for (Map.Entry<String, Histogram> e : histograms.entrySet()) {
        Histogram h = e.getValue();
        Snapshot s = h.getSnapshot();
        String name = e.getKey();
        double durationFactor = 1.0 / timeUnit.durationFor(name).toNanos(1);
        String durationUnit = timeUnit.durationFor(name).toString().toLowerCase(Locale.US);
        pw.printf("<tr class='%s ui-state-default'>%n", rowClass);
        pw.printf("<td>%s</td>", name);
        pw.printf("<td>%d</td>", h.getCount());
        pw.printf("<td>%f</td>", s.getMedian() * durationFactor);
        pw.printf("<td>%f</td>", s.getMin() * durationFactor);
        pw.printf("<td>%f</td>", s.getMax() * durationFactor);
        pw.printf("<td>%f</td>", s.getMean() * durationFactor);
        pw.printf("<td>%f</td>", s.getStdDev() * durationFactor);
        pw.printf("<td>%f</td>", s.get75thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get95thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get98thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get99thPercentile() * durationFactor);
        pw.printf("<td>%f</td>", s.get999thPercentile() * durationFactor);
        pw.printf("<td>%s</td>", durationUnit);
        pw.println("</tr>");
        rowClass = "odd".equals(rowClass) ? "even" : "odd";
    }
    pw.println("</tbody>");
    pw.println("</table>");
    pw.println("</div>");
}

Example 43 with Histogram

use of com.codahale.metrics.Histogram in project sling by apache.

the class MetricWrapperTest method histogram.

@Test
public void histogram() throws Exception {
    Histogram histo = registry.histogram("test");
    HistogramImpl histoStats = new HistogramImpl(histo);
    histoStats.update(100);
    assertEquals(1, histo.getCount());
    assertEquals(1, histoStats.getCount());
    assertEquals(100, histo.getSnapshot().getMax());
    assertSame(histo, histoStats.adaptTo(Histogram.class));
}

Example 44 with Histogram

use of com.codahale.metrics.Histogram in project metrics by dropwizard.

the class MetricsModuleTest method serializesHistograms.

@Test
public void serializesHistograms() throws Exception {
    final Histogram histogram = mock(Histogram.class);
    when(histogram.getCount()).thenReturn(1L);
    final Snapshot snapshot = mock(Snapshot.class);
    when(snapshot.getMax()).thenReturn(2L);
    when(snapshot.getMean()).thenReturn(3.0);
    when(snapshot.getMin()).thenReturn(4L);
    when(snapshot.getStdDev()).thenReturn(5.0);
    when(snapshot.getMedian()).thenReturn(6.0);
    when(snapshot.get75thPercentile()).thenReturn(7.0);
    when(snapshot.get95thPercentile()).thenReturn(8.0);
    when(snapshot.get98thPercentile()).thenReturn(9.0);
    when(snapshot.get99thPercentile()).thenReturn(10.0);
    when(snapshot.get999thPercentile()).thenReturn(11.0);
    when(snapshot.getValues()).thenReturn(new long[] { 1, 2, 3 });
    when(histogram.getSnapshot()).thenReturn(snapshot);
    assertThat(mapper.writeValueAsString(histogram)).isEqualTo("{" + "\"count\":1," + "\"max\":2," + "\"mean\":3.0," + "\"min\":4," + "\"p50\":6.0," + "\"p75\":7.0," + "\"p95\":8.0," + "\"p98\":9.0," + "\"p99\":10.0," + "\"p999\":11.0," + "\"stddev\":5.0}");
    final ObjectMapper fullMapper = new ObjectMapper().registerModule(new MetricsModule(TimeUnit.SECONDS, TimeUnit.MILLISECONDS, true, MetricFilter.ALL));
    assertThat(fullMapper.writeValueAsString(histogram)).isEqualTo("{" + "\"count\":1," + "\"max\":2," + "\"mean\":3.0," + "\"min\":4," + "\"p50\":6.0," + "\"p75\":7.0," + "\"p95\":8.0," + "\"p98\":9.0," + "\"p99\":10.0," + "\"p999\":11.0," + "\"values\":[1,2,3]," + "\"stddev\":5.0}");
}