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WebMvcEndpointHandlerMapping.java
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WebMvcEndpointHandlerMapping.java
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/*
* Copyright 2012-2019 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.endpoint.web.servlet;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
import org.springframework.boot.actuate.endpoint.web.ExposableWebEndpoint;
import org.springframework.boot.actuate.endpoint.web.Link;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.servlet.HandlerMapping;
/**
* A custom {@link HandlerMapping} that makes web endpoints available over HTTP using
* Spring MVC.
*
* @author Andy Wilkinson
* @author Phillip Webb
* @since 2.0.0
*/
public class WebMvcEndpointHandlerMapping extends AbstractWebMvcEndpointHandlerMapping {
private final EndpointLinksResolver linksResolver;
/**
* Creates a new {@code WebMvcEndpointHandlerMapping} instance that provides mappings
* for the given endpoints.
* @param endpointMapping the base mapping for all endpoints
* @param endpoints the web endpoints
* @param endpointMediaTypes media types consumed and produced by the endpoints
* @param corsConfiguration the CORS configuration for the endpoints or {@code null}
* @param linksResolver resolver for determining links to available endpoints
* @param shouldRegisterLinksMapping whether the links endpoint should be registered
*/
public WebMvcEndpointHandlerMapping(EndpointMapping endpointMapping, Collection<ExposableWebEndpoint> endpoints,
EndpointMediaTypes endpointMediaTypes, CorsConfiguration corsConfiguration,
EndpointLinksResolver linksResolver, boolean shouldRegisterLinksMapping) {
super(endpointMapping, endpoints, endpointMediaTypes, corsConfiguration, shouldRegisterLinksMapping);
this.linksResolver = linksResolver;
setOrder(-100);
}
@Override
protected LinksHandler getLinksHandler() {
return new WebMvcLinksHandler();
}
/**
* Handler for root endpoint providing links.
*/
class WebMvcLinksHandler implements LinksHandler {
@Override
@ResponseBody
public Map<String, Map<String, Link>> links(HttpServletRequest request, HttpServletResponse response) {
return Collections.singletonMap("_links",
WebMvcEndpointHandlerMapping.this.linksResolver.resolveLinks(request.getRequestURL().toString()));
}
@Override
public String toString() {
return "Actuator root web endpoint";
}
}
}