spring-kafka DefaultBatchToRecordAdapter 源码
spring-kafka DefaultBatchToRecordAdapter 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/listener/adapter/DefaultBatchToRecordAdapter.java
/*
* Copyright 2020 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.adapter;
import java.util.List;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.core.log.LogAccessor;
import org.springframework.kafka.listener.ConsumerRecordRecoverer;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.messaging.Message;
import org.springframework.util.Assert;
/**
* The default {@link BatchToRecordAdapter} implementation; if the supplied recoverer
* throws an exception, the batch will be aborted; otherwise the next record will be
* processed.
*
* @param <K> the key type.
* @param <V> the value type.
*
* @author Gary Russell
* @since 2.4.2
*/
public class DefaultBatchToRecordAdapter<K, V> implements BatchToRecordAdapter<K, V> {
private static final LogAccessor LOGGER = new LogAccessor(DefaultBatchToRecordAdapter.class);
private final ConsumerRecordRecoverer recoverer;
/**
* Construct an instance with the default recoverer which simply logs the failed
* record.
*/
public DefaultBatchToRecordAdapter() {
this((record, ex) -> LOGGER.error(ex, () -> "Failed to process " + record));
}
/**
* Construct an instance with the provided recoverer.
* @param recoverer the recoverer.
*/
public DefaultBatchToRecordAdapter(ConsumerRecordRecoverer recoverer) {
Assert.notNull(recoverer, "'recoverer' cannot be null");
this.recoverer = recoverer;
}
@Override
public void adapt(List<Message<?>> messages, List<ConsumerRecord<K, V>> records, Acknowledgment ack,
Consumer<?, ?> consumer, Callback<K, V> callback) {
for (int i = 0; i < messages.size(); i++) {
Message<?> message = messages.get(i);
try {
callback.invoke(records.get(i), ack, consumer, message);
}
catch (Exception e) {
this.recoverer.accept(records.get(i), e);
}
}
}
}
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