spring-kafka AcknowledgingConsumerAwareMessageListener 源码
spring-kafka AcknowledgingConsumerAwareMessageListener 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/listener/AcknowledgingConsumerAwareMessageListener.java
/*
* Copyright 2017-2021 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.listener;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.lang.Nullable;
/**
* Listener for handling incoming Kafka messages, propagating an acknowledgment handle that recipients
* can invoke when the message has been processed. Access to the {@link Consumer} is provided.
*
* @param <K> the key type.
* @param <V> the value type.
*
* @author Gary Russell
*
* @since 2.0
*/
@FunctionalInterface
public interface AcknowledgingConsumerAwareMessageListener<K, V> extends MessageListener<K, V> {
/**
* Invoked with data from kafka. Containers should never call this since it they
* will detect that we are a consumer aware acknowledging listener.
* @param data the data to be processed.
*/
@Override
default void onMessage(ConsumerRecord<K, V> data) {
throw new UnsupportedOperationException("Container should never call this");
}
@Override
void onMessage(ConsumerRecord<K, V> data, @Nullable Acknowledgment acknowledgment, Consumer<?, ?> consumer);
}
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