spring AsyncWebRequest 源码
spring AsyncWebRequest 代码
文件路径：/spring-web/src/main/java/org/springframework/web/context/request/async/AsyncWebRequest.java
/*
* Copyright 2002-2017 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.context.request.async;
import java.util.function.Consumer;
import org.springframework.lang.Nullable;
import org.springframework.web.context.request.NativeWebRequest;
/**
* Extends {@link NativeWebRequest} with methods for asynchronous request processing.
*
* @author Rossen Stoyanchev
* @since 3.2
*/
public interface AsyncWebRequest extends NativeWebRequest {
/**
* Set the time required for concurrent handling to complete.
* This property should not be set when concurrent handling is in progress,
* i.e. when {@link #isAsyncStarted()} is {@code true}.
* @param timeout amount of time in milliseconds; {@code null} means no
* timeout, i.e. rely on the default timeout of the container.
*/
void setTimeout(@Nullable Long timeout);
/**
* Add a handler to invoke when concurrent handling has timed out.
*/
void addTimeoutHandler(Runnable runnable);
/**
* Add a handler to invoke when an error occurred while concurrent
* handling of a request.
* @since 5.0
*/
void addErrorHandler(Consumer<Throwable> exceptionHandler);
/**
* Add a handler to invoke when request processing completes.
*/
void addCompletionHandler(Runnable runnable);
/**
* Mark the start of asynchronous request processing so that when the main
* processing thread exits, the response remains open for further processing
* in another thread.
* @throws IllegalStateException if async processing has completed or is not supported
*/
void startAsync();
/**
* Whether the request is in async mode following a call to {@link #startAsync()}.
* Returns "false" if asynchronous processing never started, has completed,
* or the request was dispatched for further processing.
*/
boolean isAsyncStarted();
/**
* Dispatch the request to the container in order to resume processing after
* concurrent execution in an application thread.
*/
void dispatch();
/**
* Whether asynchronous processing has completed.
*/
boolean isAsyncComplete();
}
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