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package com.yammer.metrics;
import com.yammer.metrics.core.*;
import com.yammer.metrics.reporting.JmxReporter;
import java.util.concurrent.TimeUnit;
/**
* A set of factory methods for creating centrally registered metric instances.
*/
public class Metrics {
private static final MetricsRegistry DEFAULT_REGISTRY = new MetricsRegistry();
private static final Thread SHUTDOWN_HOOK = new Thread() {
public void run() {
JmxReporter.shutdownDefault();
}
};
static {
JmxReporter.startDefault(DEFAULT_REGISTRY);
Runtime.getRuntime().addShutdownHook(SHUTDOWN_HOOK);
}
private Metrics() { /* unused */ }
/**
* Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the given class and
* name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param metric the metric
* @param the type of the value returned by the metric
* @return {@code metric}
*/
public static Gauge newGauge(Class klass,
String name,
Gauge metric) {
return DEFAULT_REGISTRY.newGauge(klass, name, metric);
}
/**
* Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the given class and
* name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @param metric the metric
* @param the type of the value returned by the metric
* @return {@code metric}
*/
public static Gauge newGauge(Class klass,
String name,
String scope,
Gauge metric) {
return DEFAULT_REGISTRY.newGauge(klass, name, scope, metric);
}
/**
* Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the given metric name.
*
* @param metricName the name of the metric
* @param metric the metric
* @param the type of the value returned by the metric
* @return {@code metric}
*/
public static Gauge newGauge(MetricName metricName,
Gauge metric) {
return DEFAULT_REGISTRY.newGauge(metricName, metric);
}
/**
* Creates a new {@link com.yammer.metrics.core.Counter} and registers it under the given class
* and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @return a new {@link com.yammer.metrics.core.Counter}
*/
public static Counter newCounter(Class klass, String name) {
return DEFAULT_REGISTRY.newCounter(klass, name);
}
/**
* Creates a new {@link com.yammer.metrics.core.Counter} and registers it under the given class
* and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @return a new {@link com.yammer.metrics.core.Counter}
*/
public static Counter newCounter(Class klass,
String name,
String scope) {
return DEFAULT_REGISTRY.newCounter(klass, name, scope);
}
/**
* Creates a new {@link com.yammer.metrics.core.Counter} and registers it under the given metric
* name.
*
* @param metricName the name of the metric
* @return a new {@link com.yammer.metrics.core.Counter}
*/
public static Counter newCounter(MetricName metricName) {
return DEFAULT_REGISTRY.newCounter(metricName);
}
/**
* Creates a new {@link com.yammer.metrics.core.Histogram} and registers it under the given
* class and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param biased whether or not the histogram should be biased
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(Class klass,
String name,
boolean biased) {
return DEFAULT_REGISTRY.newHistogram(klass, name, biased);
}
/**
* Creates a new {@link com.yammer.metrics.core.Histogram} and registers it under the given
* class, name, and scope.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @param biased whether or not the histogram should be biased
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(Class klass,
String name,
String scope,
boolean biased) {
return DEFAULT_REGISTRY.newHistogram(klass, name, scope, biased);
}
/**
* Creates a new {@link com.yammer.metrics.core.Histogram} and registers it under the given
* metric name.
*
* @param metricName the name of the metric
* @param biased whether or not the histogram should be biased
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(MetricName metricName,
boolean biased) {
return DEFAULT_REGISTRY.newHistogram(metricName, biased);
}
/**
* Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and registers it under the
* given class and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(Class klass, String name) {
return DEFAULT_REGISTRY.newHistogram(klass, name);
}
/**
* Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and registers it under the
* given class, name, and scope.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(Class klass,
String name,
String scope) {
return DEFAULT_REGISTRY.newHistogram(klass, name, scope);
}
/**
* Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and registers it under the
* given metric name.
*
* @param metricName the name of the metric
* @return a new {@link com.yammer.metrics.core.Histogram}
*/
public static Histogram newHistogram(MetricName metricName) {
return newHistogram(metricName, false);
}
/**
* Creates a new {@link com.yammer.metrics.core.Meter} and registers it under the given class
* and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param eventType the plural name of the type of events the meter is measuring (e.g., {@code
* "requests"})
* @param unit the rate unit of the new meter
* @return a new {@link com.yammer.metrics.core.Meter}
*/
public static Meter newMeter(Class klass,
String name,
String eventType,
TimeUnit unit) {
return DEFAULT_REGISTRY.newMeter(klass, name, eventType, unit);
}
/**
* Creates a new {@link com.yammer.metrics.core.Meter} and registers it under the given class,
* name, and scope.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @param eventType the plural name of the type of events the meter is measuring (e.g., {@code
* "requests"})
* @param unit the rate unit of the new meter
* @return a new {@link com.yammer.metrics.core.Meter}
*/
public static Meter newMeter(Class klass,
String name,
String scope,
String eventType,
TimeUnit unit) {
return DEFAULT_REGISTRY.newMeter(klass, name, scope, eventType, unit);
}
/**
* Creates a new {@link com.yammer.metrics.core.Meter} and registers it under the given metric
* name.
*
* @param metricName the name of the metric
* @param eventType the plural name of the type of events the meter is measuring (e.g., {@code
* "requests"})
* @param unit the rate unit of the new meter
* @return a new {@link com.yammer.metrics.core.Meter}
*/
public static Meter newMeter(MetricName metricName,
String eventType,
TimeUnit unit) {
return DEFAULT_REGISTRY.newMeter(metricName, eventType, unit);
}
/**
* Creates a new {@link com.yammer.metrics.core.Timer} and registers it under the given class
* and name.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param durationUnit the duration scale unit of the new timer
* @param rateUnit the rate scale unit of the new timer
* @return a new {@link com.yammer.metrics.core.Timer}
*/
public static Timer newTimer(Class klass,
String name,
TimeUnit durationUnit,
TimeUnit rateUnit) {
return DEFAULT_REGISTRY.newTimer(klass, name, durationUnit, rateUnit);
}
/**
* Creates a new {@link com.yammer.metrics.core.Timer} and registers it under the given class
* and name, measuring elapsed time in milliseconds and invocations per second.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @return a new {@link com.yammer.metrics.core.Timer}
*/
public static Timer newTimer(Class klass,
String name) {
return DEFAULT_REGISTRY.newTimer(klass, name);
}
/**
* Creates a new {@link com.yammer.metrics.core.Timer} and registers it under the given class,
* name, and scope.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @param durationUnit the duration scale unit of the new timer
* @param rateUnit the rate scale unit of the new timer
* @return a new {@link com.yammer.metrics.core.Timer}
*/
public static Timer newTimer(Class klass,
String name,
String scope,
TimeUnit durationUnit,
TimeUnit rateUnit) {
return DEFAULT_REGISTRY.newTimer(klass, name, scope, durationUnit, rateUnit);
}
/**
* Creates a new {@link com.yammer.metrics.core.Timer} and registers it under the given class,
* name, and scope, measuring elapsed time in milliseconds and invocations per second.
*
* @param klass the class which owns the metric
* @param name the name of the metric
* @param scope the scope of the metric
* @return a new {@link com.yammer.metrics.core.Timer}
*/
public static Timer newTimer(Class klass,
String name,
String scope) {
return DEFAULT_REGISTRY.newTimer(klass, name, scope);
}
/**
* Creates a new {@link com.yammer.metrics.core.Timer} and registers it under the given metric
* name.
*
* @param metricName the name of the metric
* @param durationUnit the duration scale unit of the new timer
* @param rateUnit the rate scale unit of the new timer
* @return a new {@link com.yammer.metrics.core.Timer}
*/
public static Timer newTimer(MetricName metricName,
TimeUnit durationUnit,
TimeUnit rateUnit) {
return DEFAULT_REGISTRY.newTimer(metricName, durationUnit, rateUnit);
}
/**
* Returns the (static) default registry.
*
* @return the metrics registry
*/
public static MetricsRegistry defaultRegistry() {
return DEFAULT_REGISTRY;
}
/**
* Shuts down all thread pools for the default registry.
*/
public static void shutdown() {
DEFAULT_REGISTRY.shutdown();
JmxReporter.shutdownDefault();
Runtime.getRuntime().removeShutdownHook(SHUTDOWN_HOOK);
}
}
