/*
* 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.metrics.rich;
import java.util.ArrayList;
import java.util.List;
import org.springframework.boot.actuate.metrics.Metric;
import org.springframework.boot.actuate.metrics.repository.MultiMetricRepository;
/**
* A {@link RichGaugeReader} that works by reading metric values from a
* {@link MultiMetricRepository} where the group name is the RichGauge name. The format
* used matches that in the RichGaugeExporter, so this reader can be used on a store that
* has been populated using that exporter.
*
* @author Dave Syer
* @since 1.1.0
*/
public class MultiMetricRichGaugeReader implements RichGaugeReader {
private final MultiMetricRepository repository;
public MultiMetricRichGaugeReader(MultiMetricRepository repository) {
this.repository = repository;
}
@Override
public RichGauge findOne(String name) {
Iterable<Metric<?>> metrics = this.repository.findAll(name);
double value = 0;
double average = 0.;
double alpha = -1.;
double min = 0.;
double max = 0.;
long count = 0;
for (Metric<?> metric : metrics) {
if (metric.getName().endsWith(RichGauge.VAL)) {
value = metric.getValue().doubleValue();
}
else if (metric.getName().endsWith(RichGauge.ALPHA)) {
alpha = metric.getValue().doubleValue();
}
else if (metric.getName().endsWith(RichGauge.AVG)) {
average = metric.getValue().doubleValue();
}
else if (metric.getName().endsWith(RichGauge.MIN)) {
min = metric.getValue().doubleValue();
}
else if (metric.getName().endsWith(RichGauge.MAX)) {
max = metric.getValue().doubleValue();
}
else if (metric.getName().endsWith(RichGauge.COUNT)) {
count = metric.getValue().longValue();
}
}
return new RichGauge(name, value, alpha, average, max, min, count);
}
@Override
public Iterable<RichGauge> findAll() {
List<RichGauge> result = new ArrayList<>();
for (String name : this.repository.groups()) {
result.add(findOne(name));
}
return result;
}
@Override
public long count() {
return this.repository.countGroups();
}
}