1 /* 2 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"). 5 * You may not use this file except in compliance with the License. 6 * A copy of the License is located at 7 * 8 * http://aws.amazon.com/apache2.0 9 * 10 * or in the "license" file accompanying this file. This file is distributed 11 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 12 * express or implied. See the License for the specific language governing 13 * permissions and limitations under the License. 14 */ 15 16 package software.amazon.awssdk.http.async; 17 18 import java.nio.ByteBuffer; 19 import java.util.Optional; 20 import org.reactivestreams.Publisher; 21 import software.amazon.awssdk.annotations.SdkPublicApi; 22 23 /** 24 * A {@link Publisher} of HTTP content data that allows streaming operations for asynchronous HTTP clients. 25 */ 26 @SdkPublicApi 27 public interface SdkHttpContentPublisher extends Publisher<ByteBuffer> { 28 29 /** 30 * @return The content length of the data being produced. 31 */ contentLength()32 Optional<Long> contentLength(); 33 34 } 35