spring ContextWebSocketHandler 源码
spring ContextWebSocketHandler 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/socket/adapter/ContextWebSocketHandler.java
/*
* Copyright 2002-2020 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.socket.adapter;
import java.util.List;
import reactor.core.publisher.Mono;
import reactor.util.context.ContextView;
import org.springframework.web.reactive.socket.WebSocketHandler;
import org.springframework.web.reactive.socket.WebSocketSession;
/**
* {@link WebSocketHandler} decorator that enriches the context of the target handler.
*
* @author Rossen Stoyanchev
* @since 5.3.3
*/
public final class ContextWebSocketHandler implements WebSocketHandler {
private final WebSocketHandler delegate;
private final ContextView contextView;
private ContextWebSocketHandler(WebSocketHandler delegate, ContextView contextView) {
this.delegate = delegate;
this.contextView = contextView;
}
@Override
public List<String> getSubProtocols() {
return this.delegate.getSubProtocols();
}
@Override
public Mono<Void> handle(WebSocketSession session) {
return this.delegate.handle(session).contextWrite(this.contextView);
}
/**
* Return the given handler, decorated to insert the given context, or the
* same handler instance when the context is empty.
*/
public static WebSocketHandler decorate(WebSocketHandler handler, ContextView contextView) {
return (!contextView.isEmpty() ? new ContextWebSocketHandler(handler, contextView) : handler);
}
}
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