spring-kafka KafkaHeaderMapper 源码
spring-kafka KafkaHeaderMapper 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/support/KafkaHeaderMapper.java
/*
* Copyright 2017-2022 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.kafka.support;
import java.util.Map;
import org.apache.kafka.common.header.Headers;
import org.springframework.messaging.MessageHeaders;
/**
* Header mapper for Apache Kafka.
*
* @author Gary Russell
* @since 1.3
*
*/
public interface KafkaHeaderMapper {
/**
* Map from the given {@link MessageHeaders} to the specified target headers.
* @param headers the abstracted MessageHeaders.
* @param target the native target headers.
*/
void fromHeaders(MessageHeaders headers, Headers target);
/**
* Map from the given native headers to a map of headers for the eventual
* {@link MessageHeaders}.
* @param source the native headers.
* @param target the target headers.
*/
void toHeaders(Headers source, Map<String, Object> target);
}
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