/*
* 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.mvc;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.actuate.endpoint.Endpoint;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.env.Environment;
/**
* A registry for all {@link MvcEndpoint} beans, and a factory for a set of generic ones
* wrapping existing {@link Endpoint} instances that are not already exposed as MVC
* endpoints.
*
* @author Dave Syer
*/
public class MvcEndpoints implements ApplicationContextAware, InitializingBean {
private ApplicationContext applicationContext;
private final Set<MvcEndpoint> endpoints = new HashSet<>();
private Set<Class<?>> customTypes;
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
this.applicationContext = applicationContext;
}
@Override
public void afterPropertiesSet() throws Exception {
Collection<MvcEndpoint> existing = BeanFactoryUtils
.beansOfTypeIncludingAncestors(this.applicationContext, MvcEndpoint.class)
.values();
this.endpoints.addAll(existing);
this.customTypes = findEndpointClasses(existing);
@SuppressWarnings("rawtypes")
Collection<Endpoint> delegates = BeanFactoryUtils
.beansOfTypeIncludingAncestors(this.applicationContext, Endpoint.class)
.values();
for (Endpoint<?> endpoint : delegates) {
if (isGenericEndpoint(endpoint.getClass()) && endpoint.isEnabled()) {
EndpointMvcAdapter adapter = new EndpointMvcAdapter(endpoint);
String path = determinePath(endpoint,
this.applicationContext.getEnvironment());
if (path != null) {
adapter.setPath(path);
}
this.endpoints.add(adapter);
}
}
}
private Set<Class<?>> findEndpointClasses(Collection<MvcEndpoint> existing) {
Set<Class<?>> types = new HashSet<>();
for (MvcEndpoint endpoint : existing) {
Class<?> type = endpoint.getEndpointType();
if (type != null) {
types.add(type);
}
}
return types;
}
public Set<MvcEndpoint> getEndpoints() {
return this.endpoints;
}
/**
* Return the endpoints of the specified type.
* @param <E> the Class type of the endpoints to be returned
* @param type the endpoint type
* @return the endpoints
*/
@SuppressWarnings("unchecked")
public <E extends MvcEndpoint> Set<E> getEndpoints(Class<E> type) {
Set<E> result = new HashSet<>(this.endpoints.size());
for (MvcEndpoint candidate : this.endpoints) {
if (type.isInstance(candidate)) {
result.add((E) candidate);
}
}
return Collections.unmodifiableSet(result);
}
private boolean isGenericEndpoint(Class<?> type) {
return !this.customTypes.contains(type)
&& !MvcEndpoint.class.isAssignableFrom(type);
}
private String determinePath(Endpoint<?> endpoint, Environment environment) {
ConfigurationProperties configurationProperties = AnnotationUtils
.findAnnotation(endpoint.getClass(), ConfigurationProperties.class);
if (configurationProperties != null) {
return environment.getProperty(configurationProperties.prefix() + ".path");
}
return null;
}
}