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com.yammer.metrics.core.DummyMetricsRegistry Maven / Gradle / Ivy
package com.yammer.metrics.core;
import java.util.Map;
import java.util.SortedMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSortedMap;
/**
* A no-op implementation of a metrics registry.
*
* @author [email protected]
*/
public class DummyMetricsRegistry extends MetricsRegistry {
private static final ScheduledExecutorService DUMMY_EXECUTOR = new ScheduledThreadPoolExecutor(1);
private static final Gauge DUMMY_GAUGE = new Gauge() {
@Override
public Object value() {
return null;
}
};
private static final Counter DUMMY_COUNTER = new Counter();
private static final Histogram DUMMY_HISTOGRAM = new Histogram(Histogram.SampleType.BIASED);
private static final Timer DUMMY_TIMER = new Timer(DUMMY_EXECUTOR, TimeUnit.MILLISECONDS,
TimeUnit.SECONDS);
private static final Meter DUMMY_METER = new Meter(DUMMY_EXECUTOR, "noop", TimeUnit.SECONDS,
Clock.defaultClock());
@SuppressWarnings("unchecked")
@Override
public Gauge newGauge(Class klass, String name, Gauge metric) {
return (Gauge) DUMMY_GAUGE;
}
@SuppressWarnings("unchecked")
@Override
public Gauge newGauge(Class klass, String name, String scope, Gauge metric) {
return (Gauge) DUMMY_GAUGE;
}
@SuppressWarnings("unchecked")
@Override
public Gauge newGauge(MetricName metricName, Gauge metric) {
return (Gauge) DUMMY_GAUGE;
}
@Override
public Counter newCounter(Class klass, String name) {
return DUMMY_COUNTER;
}
@Override
public Counter newCounter(Class klass, String name, String scope) {
return DUMMY_COUNTER;
}
@Override
public Counter newCounter(MetricName metricName) {
return DUMMY_COUNTER;
}
@Override
public Histogram newHistogram(Class klass, String name, boolean biased) {
return DUMMY_HISTOGRAM;
}
@Override
public Histogram newHistogram(Class klass, String name, String scope, boolean biased) {
return DUMMY_HISTOGRAM;
}
@Override
public Histogram newHistogram(Class klass, String name) {
return DUMMY_HISTOGRAM;
}
@Override
public Histogram newHistogram(Class klass, String name, String scope) {
return DUMMY_HISTOGRAM;
}
@Override
public Histogram newHistogram(MetricName metricName, boolean biased) {
return DUMMY_HISTOGRAM;
}
@Override
public Meter newMeter(Class klass, String name, String eventType, TimeUnit unit) {
return DUMMY_METER;
}
@Override
public Meter newMeter(Class klass, String name, String scope, String eventType,
TimeUnit unit) {
return DUMMY_METER;
}
@Override
public Meter newMeter(MetricName metricName, String eventType, TimeUnit unit) {
return DUMMY_METER;
}
@Override
public Timer newTimer(Class klass, String name) {
return DUMMY_TIMER;
}
@Override
public Timer newTimer(Class klass, String name, TimeUnit durationUnit, TimeUnit rateUnit) {
return DUMMY_TIMER;
}
@Override
public Timer newTimer(Class klass, String name, String scope) {
return DUMMY_TIMER;
}
@Override
public Timer newTimer(Class klass, String name, String scope, TimeUnit durationUnit, TimeUnit rateUnit) {
return DUMMY_TIMER;
}
@Override
public Timer newTimer(MetricName metricName, TimeUnit durationUnit, TimeUnit rateUnit) {
return DUMMY_TIMER;
}
@Override
public Map allMetrics() {
return ImmutableMap.of();
}
@Override
public SortedMap> groupedMetrics() {
return ImmutableSortedMap.of();
}
@Override
public SortedMap> groupedMetrics(MetricPredicate predicate) {
return ImmutableSortedMap.of();
}
@Override
public void removeMetric(Class klass, String name) {
}
@Override
public void removeMetric(Class klass, String name, String scope) {
}
@Override
public void removeMetric(MetricName name) {
}
@Override
public void addListener(MetricsRegistryListener listener) {
}
@Override
public void removeListener(MetricsRegistryListener listener) {
}
}
