/*
* 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 org.springframework.boot.actuate.metrics.Metric;
import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository;
import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository.Callback;
import org.springframework.boot.actuate.metrics.writer.Delta;
import org.springframework.boot.actuate.metrics.writer.MetricWriter;
/**
* In memory implementation of {@link MetricWriter} and {@link RichGaugeReader}. When you
* {@link MetricWriter#set(Metric) set} or {@link MetricWriter#increment(Delta) increment}
* a metric value it is used to update a {@link RichGauge}. Gauge values can then be read
* out using the reader operations.
*
* @author Dave Syer
* @author Andy Wilkinson
*/
public class InMemoryRichGaugeRepository implements RichGaugeRepository {
private final SimpleInMemoryRepository<RichGauge> repository = new SimpleInMemoryRepository<>();
@Override
public void increment(final Delta<?> delta) {
this.repository.update(delta.getName(), new Callback<RichGauge>() {
@Override
public RichGauge modify(RichGauge current) {
double value = ((Number) delta.getValue()).doubleValue();
if (current == null) {
return new RichGauge(delta.getName(), value);
}
current.set(current.getValue() + value);
return current;
}
});
}
@Override
public void set(Metric<?> metric) {
final String name = metric.getName();
final double value = metric.getValue().doubleValue();
this.repository.update(name, new Callback<RichGauge>() {
@Override
public RichGauge modify(RichGauge current) {
if (current == null) {
return new RichGauge(name, value);
}
current.set(value);
return current;
}
});
}
@Override
public void reset(String metricName) {
this.repository.remove(metricName);
}
@Override
public RichGauge findOne(String metricName) {
return this.repository.findOne(metricName);
}
@Override
public Iterable<RichGauge> findAll() {
return this.repository.findAll();
}
@Override
public long count() {
return this.repository.count();
}
}