spring EndpointLinksResolver 源码

  • 2022-08-12
  • 浏览 (633)

springboot EndpointLinksResolver 代码

文件路径:/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/EndpointLinksResolver.java

/*
 * Copyright 2012-2022 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;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.boot.actuate.endpoint.ExposableEndpoint;

/**
 * A resolver for {@link Link links} to web endpoints.
 *
 * @author Andy Wilkinson
 * @since 2.0.0
 */
public class EndpointLinksResolver {

	private static final Log logger = LogFactory.getLog(EndpointLinksResolver.class);

	private final Collection<? extends ExposableEndpoint<?>> endpoints;

	/**
	 * Creates a new {@code EndpointLinksResolver} that will resolve links to the given
	 * {@code endpoints}.
	 * @param endpoints the endpoints
	 */
	public EndpointLinksResolver(Collection<? extends ExposableEndpoint<?>> endpoints) {
		this.endpoints = endpoints;
	}

	/**
	 * Creates a new {@code EndpointLinksResolver} that will resolve links to the given
	 * {@code endpoints} that are exposed beneath the given {@code basePath}.
	 * @param endpoints the endpoints
	 * @param basePath the basePath
	 */
	public EndpointLinksResolver(Collection<? extends ExposableEndpoint<?>> endpoints, String basePath) {
		this.endpoints = endpoints;
		if (logger.isInfoEnabled()) {
			logger.info("Exposing " + endpoints.size() + " endpoint(s) beneath base path '" + basePath + "'");
		}
	}

	/**
	 * Resolves links to the known endpoints based on a request with the given
	 * {@code requestUrl}.
	 * @param requestUrl the url of the request for the endpoint links
	 * @return the links
	 */
	public Map<String, Link> resolveLinks(String requestUrl) {
		String normalizedUrl = normalizeRequestUrl(requestUrl);
		Map<String, Link> links = new LinkedHashMap<>();
		links.put("self", new Link(normalizedUrl));
		for (ExposableEndpoint<?> endpoint : this.endpoints) {
			if (endpoint instanceof ExposableWebEndpoint exposableWebEndpoint) {
				collectLinks(links, exposableWebEndpoint, normalizedUrl);
			}
			else if (endpoint instanceof PathMappedEndpoint pathMappedEndpoint) {
				String rootPath = pathMappedEndpoint.getRootPath();
				Link link = createLink(normalizedUrl, rootPath);
				links.put(endpoint.getEndpointId().toLowerCaseString(), link);
			}
		}
		return links;
	}

	private String normalizeRequestUrl(String requestUrl) {
		if (requestUrl.endsWith("/")) {
			return requestUrl.substring(0, requestUrl.length() - 1);
		}
		return requestUrl;
	}

	private void collectLinks(Map<String, Link> links, ExposableWebEndpoint endpoint, String normalizedUrl) {
		for (WebOperation operation : endpoint.getOperations()) {
			links.put(operation.getId(), createLink(normalizedUrl, operation));
		}
	}

	private Link createLink(String requestUrl, WebOperation operation) {
		return createLink(requestUrl, operation.getRequestPredicate().getPath());
	}

	private Link createLink(String requestUrl, String path) {
		return new Link(requestUrl + (path.startsWith("/") ? path : "/" + path));
	}

}

相关信息

spring 源码目录

相关文章

spring EndpointMapping 源码

spring EndpointMediaTypes 源码

spring EndpointServlet 源码

spring ExposableServletEndpoint 源码

spring ExposableWebEndpoint 源码

spring Link 源码

spring PathMappedEndpoint 源码

spring PathMappedEndpoints 源码

spring PathMapper 源码

spring ServletEndpointRegistrar 源码

0  赞