/*
* 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.endpoint;
import java.util.Collection;
import org.springframework.boot.actuate.metrics.Metric;
/**
* Interface to expose specific {@link Metric}s via a {@link MetricsEndpoint}.
* Implementations should take care that the metrics they provide have unique names in the
* application context, but they shouldn't have to care about global uniqueness in the JVM
* or across a distributed system.
*
* @author Dave Syer
* @see SystemPublicMetrics SystemPublicMetrics for an example implementation
*/
@FunctionalInterface
public interface PublicMetrics {
/**
* Return an indication of current state through metrics.
* @return the public metrics
*/
Collection<Metric<?>> metrics();
}