spring-kafka ChainedKafkaTransactionManager 源码
spring-kafka ChainedKafkaTransactionManager 代码
文件路径:/spring-kafka/src/main/java/org/springframework/kafka/transaction/ChainedKafkaTransactionManager.java
/*
* Copyright 2018-2021 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.transaction;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.util.Assert;
/**
* A {@link org.springframework.data.transaction.ChainedTransactionManager} that has
* exactly one {@link KafkaAwareTransactionManager} in the chain.
*
* @param <K> the key type.
* @param <V> the value type.
*
* @author Gary Russell
* @since 2.1.3
* @deprecated Refer to the
* {@link org.springframework.data.transaction.ChainedTransactionManager} javadocs.
*
*/
@Deprecated
public class ChainedKafkaTransactionManager<K, V> extends org.springframework.data.transaction.ChainedTransactionManager
implements KafkaAwareTransactionManager<K, V> {
private final KafkaAwareTransactionManager<K, V> kafkaTransactionManager;
/**
* Construct an instance with the provided {@link PlatformTransactionManager}s.
* @param transactionManagers the transaction managers.
*/
@SuppressWarnings("unchecked")
public ChainedKafkaTransactionManager(PlatformTransactionManager... transactionManagers) {
super(transactionManagers);
KafkaAwareTransactionManager<K, V> uniqueKafkaTransactionManager = null;
for (PlatformTransactionManager tm : transactionManagers) {
if (tm instanceof KafkaAwareTransactionManager) {
Assert.isNull(uniqueKafkaTransactionManager, "Only one KafkaAwareTransactionManager is allowed");
uniqueKafkaTransactionManager = (KafkaAwareTransactionManager<K, V>) tm;
}
}
Assert.notNull(uniqueKafkaTransactionManager, "Exactly one KafkaAwareTransactionManager is required");
this.kafkaTransactionManager = uniqueKafkaTransactionManager;
}
@Override
public ProducerFactory<K, V> getProducerFactory() {
return this.kafkaTransactionManager.getProducerFactory();
}
}
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