spring ServletEndpointRegistrar 源码
springboot ServletEndpointRegistrar 代码
文件路径：/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/ServletEndpointRegistrar.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 jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRegistration.Dynamic;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* {@link ServletContextInitializer} to register {@link ExposableServletEndpoint servlet
* endpoints}.
*
* @author Phillip Webb
* @author Madhura Bhave
* @since 2.0.0
*/
public class ServletEndpointRegistrar implements ServletContextInitializer {
private static final Log logger = LogFactory.getLog(ServletEndpointRegistrar.class);
private final String basePath;
private final Collection<ExposableServletEndpoint> servletEndpoints;
public ServletEndpointRegistrar(String basePath, Collection<ExposableServletEndpoint> servletEndpoints) {
Assert.notNull(servletEndpoints, "ServletEndpoints must not be null");
this.basePath = cleanBasePath(basePath);
this.servletEndpoints = servletEndpoints;
}
private static String cleanBasePath(String basePath) {
if (StringUtils.hasText(basePath) && basePath.endsWith("/")) {
return basePath.substring(0, basePath.length() - 1);
}
return (basePath != null) ? basePath : "";
}
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
this.servletEndpoints.forEach((servletEndpoint) -> register(servletContext, servletEndpoint));
}
private void register(ServletContext servletContext, ExposableServletEndpoint endpoint) {
String name = endpoint.getEndpointId().toLowerCaseString() + "-actuator-endpoint";
String path = this.basePath + "/" + endpoint.getRootPath();
String urlMapping = path.endsWith("/") ? path + "*" : path + "/*";
EndpointServlet endpointServlet = endpoint.getEndpointServlet();
Dynamic registration = servletContext.addServlet(name, endpointServlet.getServlet());
registration.addMapping(urlMapping);
registration.setInitParameters(endpointServlet.getInitParameters());
registration.setLoadOnStartup(endpointServlet.getLoadOnStartup());
logger.info("Registered '" + path + "' to " + name);
}
}
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spring ExposableServletEndpoint 源码
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- 本文标签： Spring Boot Java Spring
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