/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.actuate.cache;
import java.util.ArrayList;
import java.util.Collection;
import org.springframework.boot.actuate.metrics.Metric;
/**
* A default {@link CacheStatistics} implementation.
*
* @author Stephane Nicoll
* @since 1.3.0
*/
public class DefaultCacheStatistics implements CacheStatistics {
private Long size;
private Double hitRatio;
private Double missRatio;
@Override
public Collection<Metric<?>> toMetrics(String prefix) {
Collection<Metric<?>> result = new ArrayList<>();
addMetric(result, prefix + "size", getSize());
addMetric(result, prefix + "hit.ratio", getHitRatio());
addMetric(result, prefix + "miss.ratio", getMissRatio());
return result;
}
public void setGetCacheCounts(long hitCount, long missCount) {
long total = hitCount + missCount;
if (total > 0) {
double hitRatio = hitCount / (double) total;
setHitRatio(hitRatio);
setMissRatio(1 - hitRatio);
}
}
@Override
public Long getSize() {
return this.size;
}
public void setSize(Long size) {
this.size = size;
}
@Override
public Double getHitRatio() {
return this.hitRatio;
}
public void setHitRatio(Double hitRatio) {
this.hitRatio = hitRatio;
}
@Override
public Double getMissRatio() {
return this.missRatio;
}
public void setMissRatio(Double missRatio) {
this.missRatio = missRatio;
}
private <T extends Number> void addMetric(Collection<Metric<?>> metrics, String name,
T value) {
if (value != null) {
metrics.add(new Metric<>(name, value));
}
}
}