1 /* 2 * Copyright 2017 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 package software.amazon.eventstream; 16 17 import java.util.Map; 18 19 /** 20 * An abstraction for message construction. This interface can be used to 21 * customize message creation in different ways, such as implementing 22 * decorators that add headers or manipulate the message payload. 23 */ 24 @FunctionalInterface 25 public interface MessageBuilder { build(Map<String, HeaderValue> headers, byte[] payload)26 Message build(Map<String, HeaderValue> headers, byte[] payload); 27 defaultBuilder()28 static MessageBuilder defaultBuilder() { 29 return Message::new; 30 } 31 } 32