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Spring Boot Actuator AutoConfigure
/*
* Copyright 2012-2020 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.autoconfigure.health;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Predicate;
import java.util.function.Supplier;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils;
import org.springframework.boot.actuate.autoconfigure.health.HealthEndpointProperties.Group;
import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.Show;
import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.Status;
import org.springframework.boot.actuate.health.HealthEndpointGroup;
import org.springframework.boot.actuate.health.HealthEndpointGroups;
import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
import org.springframework.boot.actuate.health.SimpleHttpCodeStatusMapper;
import org.springframework.boot.actuate.health.SimpleStatusAggregator;
import org.springframework.boot.actuate.health.StatusAggregator;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;
/**
* Auto-configured {@link HealthEndpointGroups}.
*
* @author Phillip Webb
*/
class AutoConfiguredHealthEndpointGroups implements HealthEndpointGroups {
private static Predicate ALL = (name) -> true;
private final HealthEndpointGroup primaryGroup;
private final Map groups;
/**
* Create a new {@link AutoConfiguredHealthEndpointGroups} instance.
* @param applicationContext the application context used to check for override beans
* @param properties the health endpoint properties
*/
AutoConfiguredHealthEndpointGroups(ApplicationContext applicationContext, HealthEndpointProperties properties) {
ListableBeanFactory beanFactory = (applicationContext instanceof ConfigurableApplicationContext)
? ((ConfigurableApplicationContext) applicationContext).getBeanFactory() : applicationContext;
Show showComponents = properties.getShowComponents();
Show showDetails = properties.getShowDetails();
Set roles = properties.getRoles();
StatusAggregator statusAggregator = getNonQualifiedBean(beanFactory, StatusAggregator.class);
if (statusAggregator == null) {
statusAggregator = new SimpleStatusAggregator(properties.getStatus().getOrder());
}
HttpCodeStatusMapper httpCodeStatusMapper = getNonQualifiedBean(beanFactory, HttpCodeStatusMapper.class);
if (httpCodeStatusMapper == null) {
httpCodeStatusMapper = new SimpleHttpCodeStatusMapper(properties.getStatus().getHttpMapping());
}
this.primaryGroup = new AutoConfiguredHealthEndpointGroup(ALL, statusAggregator, httpCodeStatusMapper,
showComponents, showDetails, roles);
this.groups = createGroups(properties.getGroup(), beanFactory, statusAggregator, httpCodeStatusMapper,
showComponents, showDetails, roles);
}
private Map createGroups(Map groupProperties, BeanFactory beanFactory,
StatusAggregator defaultStatusAggregator, HttpCodeStatusMapper defaultHttpCodeStatusMapper,
Show defaultShowComponents, Show defaultShowDetails, Set defaultRoles) {
Map groups = new LinkedHashMap<>();
groupProperties.forEach((groupName, group) -> {
Status status = group.getStatus();
Show showComponents = (group.getShowComponents() != null) ? group.getShowComponents()
: defaultShowComponents;
Show showDetails = (group.getShowDetails() != null) ? group.getShowDetails() : defaultShowDetails;
Set roles = !CollectionUtils.isEmpty(group.getRoles()) ? group.getRoles() : defaultRoles;
StatusAggregator statusAggregator = getQualifiedBean(beanFactory, StatusAggregator.class, groupName, () -> {
if (!CollectionUtils.isEmpty(status.getOrder())) {
return new SimpleStatusAggregator(status.getOrder());
}
return defaultStatusAggregator;
});
HttpCodeStatusMapper httpCodeStatusMapper = getQualifiedBean(beanFactory, HttpCodeStatusMapper.class,
groupName, () -> {
if (!CollectionUtils.isEmpty(status.getHttpMapping())) {
return new SimpleHttpCodeStatusMapper(status.getHttpMapping());
}
return defaultHttpCodeStatusMapper;
});
Predicate members = new IncludeExcludeGroupMemberPredicate(group.getInclude(), group.getExclude());
groups.put(groupName, new AutoConfiguredHealthEndpointGroup(members, statusAggregator, httpCodeStatusMapper,
showComponents, showDetails, roles));
});
return Collections.unmodifiableMap(groups);
}
private T getNonQualifiedBean(ListableBeanFactory beanFactory, Class type) {
List candidates = new ArrayList<>();
for (String beanName : BeanFactoryUtils.beanNamesForTypeIncludingAncestors(beanFactory, type)) {
String[] aliases = beanFactory.getAliases(beanName);
if (!BeanFactoryAnnotationUtils.isQualifierMatch(
(qualifier) -> !qualifier.equals(beanName) && !ObjectUtils.containsElement(aliases, qualifier),
beanName, beanFactory)) {
candidates.add(beanName);
}
}
if (candidates.isEmpty()) {
return null;
}
if (candidates.size() == 1) {
return beanFactory.getBean(candidates.get(0), type);
}
return beanFactory.getBean(type);
}
private T getQualifiedBean(BeanFactory beanFactory, Class type, String qualifier, Supplier fallback) {
try {
return BeanFactoryAnnotationUtils.qualifiedBeanOfType(beanFactory, type, qualifier);
}
catch (NoSuchBeanDefinitionException ex) {
return fallback.get();
}
}
@Override
public HealthEndpointGroup getPrimary() {
return this.primaryGroup;
}
@Override
public Set getNames() {
return this.groups.keySet();
}
@Override
public HealthEndpointGroup get(String name) {
return this.groups.get(name);
}
}