org.springframework.boot.actuate.health.HealthAggregator Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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
*
* https://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.health;
import java.util.Map;
/**
* Strategy interface used to aggregate {@link Health} instances into a final one.
*
* This is especially useful to combine subsystem states expressed through
* {@link Health#getStatus()} into one state for the entire system. The default
* implementation {@link OrderedHealthAggregator} sorts {@link Status} instances based on
* a priority list.
*
* It is possible to add more complex {@link Status} types to the system. In that case
* either the {@link OrderedHealthAggregator} needs to be properly configured or users
* need to register a custom {@link HealthAggregator} as bean.
*
* @author Christian Dupuis
* @since 1.1.0
*/
@FunctionalInterface
public interface HealthAggregator {
/**
* Aggregate several given {@link Health} instances into one.
* @param healths the health instances to aggregate
* @return the aggregated health
*/
Health aggregate(Map healths);
}