spring ServletContextInitializer 源码
springboot ServletContextInitializer 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/ServletContextInitializer.java
/*
* Copyright 2012-2021 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.web.servlet;
import jakarta.servlet.ServletContainerInitializer;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import org.springframework.web.SpringServletContainerInitializer;
import org.springframework.web.WebApplicationInitializer;
/**
* Interface used to configure a Servlet 3.0+ {@link ServletContext context}
* programmatically. Unlike {@link WebApplicationInitializer}, classes that implement this
* interface (and do not implement {@link WebApplicationInitializer}) will <b>not</b> be
* detected by {@link SpringServletContainerInitializer} and hence will not be
* automatically bootstrapped by the Servlet container.
* <p>
* This interface is designed to act in a similar way to
* {@link ServletContainerInitializer}, but have a lifecycle that's managed by Spring and
* not the Servlet container.
* <p>
* For configuration examples see {@link WebApplicationInitializer}.
*
* @author Phillip Webb
* @since 1.4.0
* @see WebApplicationInitializer
*/
@FunctionalInterface
public interface ServletContextInitializer {
/**
* Configure the given {@link ServletContext} with any servlets, filters, listeners
* context-params and attributes necessary for initialization.
* @param servletContext the {@code ServletContext} to initialize
* @throws ServletException if any call against the given {@code ServletContext}
* throws a {@code ServletException}
*/
void onStartup(ServletContext servletContext) throws ServletException;
}
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