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

Example 96 with Histogram

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

the class BootstrapTest method bringsYourOwnMetricRegistry.

@Test
void bringsYourOwnMetricRegistry() {
    final MetricRegistry newRegistry = new MetricRegistry() {

        @Override
        public Histogram histogram(String name) {
            Histogram existed = (Histogram) getMetrics().get(name);
            return existed != null ? existed : new Histogram(new UniformReservoir());
        }
    };
    bootstrap.setMetricRegistry(newRegistry);
    bootstrap.registerMetrics();
    assertThat(newRegistry.getNames()).contains("jvm.buffers.mapped.capacity", "jvm.threads.count", "jvm.memory.heap.usage", "jvm.attribute.vendor", "jvm.classloader.loaded", "jvm.filedescriptor");
}

Example 97 with Histogram

use of com.codahale.metrics.Histogram in project infrautils by opendaylight.

the class MetricsFileReporter method report.

@Override
public void report(@SuppressWarnings("rawtypes") SortedMap<String, Gauge> gauges, SortedMap<String, Counter> counters, SortedMap<String, Histogram> histograms, SortedMap<String, Meter> meters, SortedMap<String, Timer> timers) {
    try {
        Calendar calendar = Calendar.getInstance();
        int hourOfTheDay = calendar.get(Calendar.HOUR_OF_DAY);
        int dayOfTheWeek = calendar.get(Calendar.DAY_OF_WEEK);
        // retains one week worth of counters
        rotateLastWeekFile(dayOfTheWeek, hourOfTheDay);
        boolean append = true;
        File file = createFile(dayOfTheWeek, hourOfTheDay);
        PrintWriter pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file, append), DEFAULT_ENCODING));
        pw.print("date,");
        pw.print(new Date());
        pw.println();
        pw.println("Counters:");
        for (Map.Entry<String, Counter> entry : counters.entrySet()) {
            Counter newCounter = entry.getValue();
            // avoid unnecessary write to report file
            // report the counter only if there is a change
            Long oldCounterObj = oldCounters.get(entry.getKey());
            long oldCounter = oldCounterObj != null ? oldCounterObj.longValue() : 0;
            if (newCounter.getCount() != oldCounter) {
                pw.print(entry.getKey());
                printWithSeparator(pw, "count", entry.getValue().getCount());
                printWithSeparator(pw, "diff", entry.getValue().getCount() - oldCounter);
                pw.println();
            }
        }
        pw.println("Gauges:");
        for (@SuppressWarnings("rawtypes") Map.Entry<String, Gauge> entry : gauges.entrySet()) {
            pw.print(entry.getKey());
            pw.println(entry.getValue().getValue());
        }
        pw.println("Histograms:");
        for (Map.Entry<String, Histogram> entry : histograms.entrySet()) {
            pw.print(entry.getKey());
            printWithSeparator(pw, "count", entry.getValue().getCount());
            printSampling(pw, entry.getValue());
            pw.println();
        }
        pw.println("Meters:");
        for (Map.Entry<String, Meter> entry : meters.entrySet()) {
            pw.print(entry.getKey());
            printMeter(pw, entry.getValue());
        }
        pw.println("Timers:");
        for (Map.Entry<String, Timer> entry : timers.entrySet()) {
            pw.print(entry.getKey());
            printSampling(pw, entry.getValue());
            printMeter(pw, entry.getValue());
        }
        pw.close();
    } catch (IOException e) {
        LOG.error("Failed to report counters to files", e);
    }
    counters.forEach((key, value) -> oldCounters.put(key, value.getCount()));
}