spring CompositeHandlerAdapter 源码
springboot CompositeHandlerAdapter 代码
文件路径：/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/web/servlet/CompositeHandlerAdapter.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.autoconfigure.web.servlet;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.core.annotation.AnnotationAwareOrderComparator;
import org.springframework.web.servlet.HandlerAdapter;
import org.springframework.web.servlet.ModelAndView;
/**
* Composite {@link HandlerAdapter}.
*
* @author Andy Wilkinson
* @author Stephane Nicoll
* @author Phillip Webb
*/
class CompositeHandlerAdapter implements HandlerAdapter {
private final ListableBeanFactory beanFactory;
private List<HandlerAdapter> adapters;
CompositeHandlerAdapter(ListableBeanFactory beanFactory) {
this.beanFactory = beanFactory;
}
@Override
public boolean supports(Object handler) {
return getAdapter(handler).isPresent();
}
@Override
public ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
Optional<HandlerAdapter> adapter = getAdapter(handler);
if (adapter.isPresent()) {
return adapter.get().handle(request, response, handler);
}
return null;
}
@Override
@Deprecated
@SuppressWarnings("deprecation")
public long getLastModified(HttpServletRequest request, Object handler) {
Optional<HandlerAdapter> adapter = getAdapter(handler);
return adapter.map((handlerAdapter) -> handlerAdapter.getLastModified(request, handler)).orElse(0L);
}
private Optional<HandlerAdapter> getAdapter(Object handler) {
if (this.adapters == null) {
this.adapters = extractAdapters();
}
return this.adapters.stream().filter((a) -> a.supports(handler)).findFirst();
}
private List<HandlerAdapter> extractAdapters() {
List<HandlerAdapter> list = new ArrayList<>(this.beanFactory.getBeansOfType(HandlerAdapter.class).values());
list.remove(this);
AnnotationAwareOrderComparator.sort(list);
return list;
}
}
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- 本文标签： Spring Boot Java Spring
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