spring WebSessionMethodArgumentResolver 源码
spring WebSessionMethodArgumentResolver 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/WebSessionMethodArgumentResolver.java
/*
* Copyright 2002-2019 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.web.reactive.result.method.annotation;
import reactor.core.publisher.Mono;
import org.springframework.core.MethodParameter;
import org.springframework.core.ReactiveAdapter;
import org.springframework.core.ReactiveAdapterRegistry;
import org.springframework.web.reactive.BindingContext;
import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolverSupport;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebSession;
/**
* Resolves method argument value of type {@link WebSession}.
*
* @author Rossen Stoyanchev
* @since 5.2
* @see ServerWebExchangeMethodArgumentResolver
*/
public class WebSessionMethodArgumentResolver extends HandlerMethodArgumentResolverSupport {
// We need this resolver separate from ServerWebExchangeArgumentResolver which
// implements SyncHandlerMethodArgumentResolver.
public WebSessionMethodArgumentResolver(ReactiveAdapterRegistry adapterRegistry) {
super(adapterRegistry);
}
@Override
public boolean supportsParameter(MethodParameter parameter) {
return checkParameterType(parameter, WebSession.class::isAssignableFrom);
}
@Override
public Mono<Object> resolveArgument(
MethodParameter parameter, BindingContext context, ServerWebExchange exchange) {
Mono<WebSession> session = exchange.getSession();
ReactiveAdapter adapter = getAdapterRegistry().getAdapter(parameter.getParameterType());
return (adapter != null ? Mono.just(adapter.fromPublisher(session)) : Mono.from(session));
}
}
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