/*
* 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.dropwizard;
import com.codahale.metrics.Reservoir;
/**
* Factory interface that can be used by {@link DropwizardMetricServices} to create a
* custom {@link Reservoir}.
*
* @author Lucas Saldanha
* @author Phillip Webb
* @since 1.5.0
*/
@FunctionalInterface
public interface ReservoirFactory {
/**
* Default empty {@link ReservoirFactory} implementation.
*/
ReservoirFactory NONE = new ReservoirFactory() {
@Override
public Reservoir getReservoir(String name) {
return null;
}
};
/**
* Return the {@link Reservoir} instance to use or {@code null} if a custom reservoir
* is not needed.
* @param name the name of the metric
* @return a reservoir instance or {@code null}
*/
Reservoir getReservoir(String name);
}