com.yammer.metrics.reporting.ConsoleReporter Maven / Gradle / Ivy
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package com.yammer.metrics.reporting;
import com.yammer.metrics.Metrics;
import com.yammer.metrics.core.*;
import com.yammer.metrics.stats.Snapshot;
import com.yammer.metrics.core.MetricPredicate;
import java.io.PrintStream;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Map.Entry;
import java.util.SortedMap;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
/**
* A simple reporters which prints out application metrics to a {@link PrintStream} periodically.
*/
public class ConsoleReporter extends AbstractPollingReporter implements
MetricProcessor {
private static final int CONSOLE_WIDTH = 80;
/**
* Enables the console reporter for the default metrics registry, and causes it to print to
* STDOUT with the specified period.
*
* @param period the period between successive outputs
* @param unit the time unit of {@code period}
*/
public static void enable(long period, TimeUnit unit) {
enable(Metrics.defaultRegistry(), period, unit);
}
/**
* Enables the console reporter for the given metrics registry, and causes it to print to STDOUT
* with the specified period and unrestricted output.
*
* @param metricsRegistry the metrics registry
* @param period the period between successive outputs
* @param unit the time unit of {@code period}
*/
public static void enable(MetricsRegistry metricsRegistry, long period, TimeUnit unit) {
final ConsoleReporter reporter = new ConsoleReporter(metricsRegistry,
System.out,
MetricPredicate.ALL);
reporter.start(period, unit);
}
private final PrintStream out;
private final MetricPredicate predicate;
private final Clock clock;
private final TimeZone timeZone;
private final Locale locale;
/**
* Creates a new {@link ConsoleReporter} for the default metrics registry, with unrestricted
* output.
*
* @param out the {@link PrintStream} to which output will be written
*/
public ConsoleReporter(PrintStream out) {
this(Metrics.defaultRegistry(), out, MetricPredicate.ALL);
}
/**
* Creates a new {@link ConsoleReporter} for a given metrics registry.
*
* @param metricsRegistry the metrics registry
* @param out the {@link PrintStream} to which output will be written
* @param predicate the {@link MetricPredicate} used to determine whether a metric will be
* output
*/
public ConsoleReporter(MetricsRegistry metricsRegistry, PrintStream out, MetricPredicate predicate) {
this(metricsRegistry, out, predicate, Clock.defaultClock(), TimeZone.getDefault());
}
/**
* Creates a new {@link ConsoleReporter} for a given metrics registry.
*
* @param metricsRegistry the metrics registry
* @param out the {@link PrintStream} to which output will be written
* @param predicate the {@link MetricPredicate} used to determine whether a metric will be
* output
* @param clock the {@link Clock} used to print time
* @param timeZone the {@link TimeZone} used to print time
*/
public ConsoleReporter(MetricsRegistry metricsRegistry,
PrintStream out,
MetricPredicate predicate,
Clock clock,
TimeZone timeZone) {
this(metricsRegistry, out, predicate, clock, timeZone, Locale.getDefault());
}
/**
* Creates a new {@link ConsoleReporter} for a given metrics registry.
*
* @param metricsRegistry the metrics registry
* @param out the {@link PrintStream} to which output will be written
* @param predicate the {@link MetricPredicate} used to determine whether a metric will be
* output
* @param clock the {@link com.yammer.metrics.core.Clock} used to print time
* @param timeZone the {@link TimeZone} used to print time
* @param locale the {@link Locale} used to print values
*/
public ConsoleReporter(MetricsRegistry metricsRegistry,
PrintStream out,
MetricPredicate predicate,
Clock clock,
TimeZone timeZone, Locale locale) {
super(metricsRegistry, "console-reporter");
this.out = out;
this.predicate = predicate;
this.clock = clock;
this.timeZone = timeZone;
this.locale = locale;
}
@Override
public void run() {
try {
final DateFormat format = DateFormat.getDateTimeInstance(DateFormat.SHORT,
DateFormat.MEDIUM,
locale);
format.setTimeZone(timeZone);
final String dateTime = format.format(new Date(clock.time()));
out.print(dateTime);
out.print(' ');
for (int i = 0; i < (CONSOLE_WIDTH - dateTime.length() - 1); i++) {
out.print('=');
}
out.println();
for (Entry> entry : getMetricsRegistry().groupedMetrics(
predicate).entrySet()) {
out.print(entry.getKey());
out.println(':');
for (Entry subEntry : entry.getValue().entrySet()) {
out.print(" ");
out.print(subEntry.getKey().getName());
out.println(':');
subEntry.getValue().processWith(this, subEntry.getKey(), out);
out.println();
}
out.println();
}
out.println();
out.flush();
} catch (Exception e) {
e.printStackTrace(out);
}
}
@Override
public void processGauge(MetricName name, Gauge gauge, PrintStream stream) {
stream.printf(locale, " value = %s\n", gauge.value());
}
@Override
public void processCounter(MetricName name, Counter counter, PrintStream stream) {
stream.printf(locale, " count = %d\n", counter.count());
}
@Override
public void processMeter(MetricName name, Metered meter, PrintStream stream) {
final String unit = abbrev(meter.rateUnit());
stream.printf(locale, " count = %d\n", meter.count());
stream.printf(locale, " mean rate = %2.2f %s/%s\n",
meter.meanRate(),
meter.eventType(),
unit);
stream.printf(locale, " 1-minute rate = %2.2f %s/%s\n",
meter.oneMinuteRate(),
meter.eventType(),
unit);
stream.printf(locale, " 5-minute rate = %2.2f %s/%s\n",
meter.fiveMinuteRate(),
meter.eventType(),
unit);
stream.printf(locale, " 15-minute rate = %2.2f %s/%s\n",
meter.fifteenMinuteRate(),
meter.eventType(),
unit);
}
@Override
public void processHistogram(MetricName name, Histogram histogram, PrintStream stream) {
final Snapshot snapshot = histogram.getSnapshot();
stream.printf(locale, " min = %2.2f\n", histogram.min());
stream.printf(locale, " max = %2.2f\n", histogram.max());
stream.printf(locale, " mean = %2.2f\n", histogram.mean());
stream.printf(locale, " stddev = %2.2f\n", histogram.stdDev());
stream.printf(locale, " median = %2.2f\n", snapshot.getMedian());
stream.printf(locale, " 75%% <= %2.2f\n", snapshot.get75thPercentile());
stream.printf(locale, " 95%% <= %2.2f\n", snapshot.get95thPercentile());
stream.printf(locale, " 98%% <= %2.2f\n", snapshot.get98thPercentile());
stream.printf(locale, " 99%% <= %2.2f\n", snapshot.get99thPercentile());
stream.printf(locale, " 99.9%% <= %2.2f\n", snapshot.get999thPercentile());
}
@Override
public void processTimer(MetricName name, Timer timer, PrintStream stream) {
processMeter(name, timer, stream);
final String durationUnit = abbrev(timer.durationUnit());
final Snapshot snapshot = timer.getSnapshot();
stream.printf(locale, " min = %2.2f%s\n", timer.min(), durationUnit);
stream.printf(locale, " max = %2.2f%s\n", timer.max(), durationUnit);
stream.printf(locale, " mean = %2.2f%s\n", timer.mean(), durationUnit);
stream.printf(locale, " stddev = %2.2f%s\n", timer.stdDev(), durationUnit);
stream.printf(locale, " median = %2.2f%s\n", snapshot.getMedian(), durationUnit);
stream.printf(locale, " 75%% <= %2.2f%s\n", snapshot.get75thPercentile(), durationUnit);
stream.printf(locale, " 95%% <= %2.2f%s\n", snapshot.get95thPercentile(), durationUnit);
stream.printf(locale, " 98%% <= %2.2f%s\n", snapshot.get98thPercentile(), durationUnit);
stream.printf(locale, " 99%% <= %2.2f%s\n", snapshot.get99thPercentile(), durationUnit);
stream.printf(locale, " 99.9%% <= %2.2f%s\n", snapshot.get999thPercentile(), durationUnit);
}
private String abbrev(TimeUnit unit) {
switch (unit) {
case NANOSECONDS:
return "ns";
case MICROSECONDS:
return "us";
case MILLISECONDS:
return "ms";
case SECONDS:
return "s";
case MINUTES:
return "m";
case HOURS:
return "h";
case DAYS:
return "d";
default:
throw new IllegalArgumentException("Unrecognized TimeUnit: " + unit);
}
}
}
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