org.graylog2.metrics.CacheStatsSet Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.metrics;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Metric;
import com.codahale.metrics.MetricSet;
import com.google.common.cache.Cache;
import com.google.common.collect.ImmutableMap;
import java.util.Map;
import static com.codahale.metrics.MetricRegistry.name;
public class CacheStatsSet implements MetricSet {
private final Map metrics;
public CacheStatsSet(final String prefix, final Cache cache) {
this.metrics = ImmutableMap.builder()
.put(name(prefix, "requests"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().requestCount();
}
})
.put(name(prefix, "hits"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().hitCount();
}
})
.put(name(prefix, "misses"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().missCount();
}
})
.put(name(prefix, "evictions"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().evictionCount();
}
})
.put(name(prefix, "total-load-time-ns"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().totalLoadTime();
}
})
.put(name(prefix, "load-successes"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().loadSuccessCount();
}
})
.put(name(prefix, "load-exceptions"), new Gauge() {
@Override
public Long getValue() {
return cache.stats().loadExceptionCount();
}
})
.put(name(prefix, "hit-rate"), new Gauge() {
@Override
public Double getValue() {
return cache.stats().hitRate();
}
})
.put(name(prefix, "miss-rate"), new Gauge() {
@Override
public Double getValue() {
return cache.stats().missRate();
}
})
.build();
}
@Override
public Map getMetrics() {
return metrics;
}
}