org.springframework.kafka.transaction.ChainedKafkaTransactionManager Maven / Gradle / Ivy
/*
* Copyright 2018-2020 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.transaction;
import org.springframework.data.transaction.ChainedTransactionManager;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.util.Assert;
/**
* A {@link ChainedTransactionManager} that has exactly one
* {@link KafkaAwareTransactionManager} in the chain.
*
* @param the key type.
* @param the value type.
*
* @author Gary Russell
* @since 2.1.3
*
*/
public class ChainedKafkaTransactionManager extends ChainedTransactionManager implements KafkaAwareTransactionManager {
private final KafkaAwareTransactionManager kafkaTransactionManager;
/**
* Construct an instance with the provided {@link PlatformTransactionManager}s.
* @param transactionManagers the transaction managers.
*/
@SuppressWarnings("unchecked")
public ChainedKafkaTransactionManager(PlatformTransactionManager... transactionManagers) {
super(transactionManagers);
KafkaAwareTransactionManager uniqueKafkaTransactionManager = null;
for (PlatformTransactionManager tm : transactionManagers) {
if (tm instanceof KafkaAwareTransactionManager) {
Assert.isNull(uniqueKafkaTransactionManager, "Only one KafkaAwareTransactionManager is allowed");
uniqueKafkaTransactionManager = (KafkaTransactionManager) tm;
}
}
Assert.notNull(uniqueKafkaTransactionManager, "Exactly one KafkaAwareTransactionManager is required");
this.kafkaTransactionManager = uniqueKafkaTransactionManager;
}
@Override
public ProducerFactory getProducerFactory() {
return this.kafkaTransactionManager.getProducerFactory();
}
}