spring ZeroCopyHttpOutputMessage 源码
spring ZeroCopyHttpOutputMessage 代码
文件路径：/spring-web/src/main/java/org/springframework/http/ZeroCopyHttpOutputMessage.java
/*
* Copyright 2002-2018 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.http;
import java.io.File;
import java.nio.file.Path;
import reactor.core.publisher.Mono;
/**
* Sub-interface of {@code ReactiveOutputMessage} that has support for "zero-copy"
* file transfers.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 5.0
* @see <a href="https://en.wikipedia.org/wiki/Zero-copy">Zero-copy</a>
*/
public interface ZeroCopyHttpOutputMessage extends ReactiveHttpOutputMessage {
/**
* Use the given {@link File} to write the body of the message to the underlying
* HTTP layer.
* @param file the file to transfer
* @param position the position within the file from which the transfer is to begin
* @param count the number of bytes to be transferred
* @return a publisher that indicates completion or error.
*/
default Mono<Void> writeWith(File file, long position, long count) {
return writeWith(file.toPath(), position, count);
}
/**
* Use the given {@link Path} to write the body of the message to the underlying
* HTTP layer.
* @param file the file to transfer
* @param position the position within the file from which the transfer is to begin
* @param count the number of bytes to be transferred
* @return a publisher that indicates completion or error.
* @since 5.1
*/
Mono<Void> writeWith(Path file, long position, long count);
}
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