spring KafkaAnnotationDrivenConfiguration 源码

springboot KafkaAnnotationDrivenConfiguration 代码

文件路径：/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/kafka/KafkaAnnotationDrivenConfiguration.java

/*
 * Copyright 2012-2022 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.boot.autoconfigure.kafka;

import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.kafka.KafkaProperties.Listener.Type;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.config.KafkaListenerConfigUtils;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.listener.AfterRollbackProcessor;
import org.springframework.kafka.listener.CommonErrorHandler;
import org.springframework.kafka.listener.ConsumerAwareRebalanceListener;
import org.springframework.kafka.listener.RecordInterceptor;
import org.springframework.kafka.listener.adapter.RecordFilterStrategy;
import org.springframework.kafka.support.converter.BatchMessageConverter;
import org.springframework.kafka.support.converter.BatchMessagingMessageConverter;
import org.springframework.kafka.support.converter.MessageConverter;
import org.springframework.kafka.support.converter.RecordMessageConverter;
import org.springframework.kafka.transaction.KafkaAwareTransactionManager;

/**
 * Configuration for Kafka annotation-driven support.
 *
 * @author Gary Russell
 * @author Eddú Meléndez
 */
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(EnableKafka.class)
class KafkaAnnotationDrivenConfiguration {

	private final KafkaProperties properties;

	private final RecordMessageConverter messageConverter;

	private final RecordFilterStrategy<Object, Object> recordFilterStrategy;

	private final BatchMessageConverter batchMessageConverter;

	private final KafkaTemplate<Object, Object> kafkaTemplate;

	private final KafkaAwareTransactionManager<Object, Object> transactionManager;

	private final ConsumerAwareRebalanceListener rebalanceListener;

	private final CommonErrorHandler commonErrorHandler;

	private final AfterRollbackProcessor<Object, Object> afterRollbackProcessor;

	private final RecordInterceptor<Object, Object> recordInterceptor;

	KafkaAnnotationDrivenConfiguration(KafkaProperties properties,
			ObjectProvider<RecordMessageConverter> messageConverter,
			ObjectProvider<RecordFilterStrategy<Object, Object>> recordFilterStrategy,
			ObjectProvider<BatchMessageConverter> batchMessageConverter,
			ObjectProvider<KafkaTemplate<Object, Object>> kafkaTemplate,
			ObjectProvider<KafkaAwareTransactionManager<Object, Object>> kafkaTransactionManager,
			ObjectProvider<ConsumerAwareRebalanceListener> rebalanceListener,
			ObjectProvider<CommonErrorHandler> commonErrorHandler,
			ObjectProvider<AfterRollbackProcessor<Object, Object>> afterRollbackProcessor,
			ObjectProvider<RecordInterceptor<Object, Object>> recordInterceptor) {
		this.properties = properties;
		this.messageConverter = messageConverter.getIfUnique();
		this.recordFilterStrategy = recordFilterStrategy.getIfUnique();
		this.batchMessageConverter = batchMessageConverter
				.getIfUnique(() -> new BatchMessagingMessageConverter(this.messageConverter));
		this.kafkaTemplate = kafkaTemplate.getIfUnique();
		this.transactionManager = kafkaTransactionManager.getIfUnique();
		this.rebalanceListener = rebalanceListener.getIfUnique();
		this.commonErrorHandler = commonErrorHandler.getIfUnique();
		this.afterRollbackProcessor = afterRollbackProcessor.getIfUnique();
		this.recordInterceptor = recordInterceptor.getIfUnique();
	}

	@Bean
	@ConditionalOnMissingBean
	ConcurrentKafkaListenerContainerFactoryConfigurer kafkaListenerContainerFactoryConfigurer() {
		ConcurrentKafkaListenerContainerFactoryConfigurer configurer = new ConcurrentKafkaListenerContainerFactoryConfigurer();
		configurer.setKafkaProperties(this.properties);
		MessageConverter messageConverterToUse = (this.properties.getListener().getType().equals(Type.BATCH))
				? this.batchMessageConverter : this.messageConverter;
		configurer.setMessageConverter(messageConverterToUse);
		configurer.setRecordFilterStrategy(this.recordFilterStrategy);
		configurer.setReplyTemplate(this.kafkaTemplate);
		configurer.setTransactionManager(this.transactionManager);
		configurer.setRebalanceListener(this.rebalanceListener);
		configurer.setCommonErrorHandler(this.commonErrorHandler);
		configurer.setAfterRollbackProcessor(this.afterRollbackProcessor);
		configurer.setRecordInterceptor(this.recordInterceptor);
		return configurer;
	}

	@Bean
	@ConditionalOnMissingBean(name = "kafkaListenerContainerFactory")
	ConcurrentKafkaListenerContainerFactory<?, ?> kafkaListenerContainerFactory(
			ConcurrentKafkaListenerContainerFactoryConfigurer configurer,
			ObjectProvider<ConsumerFactory<Object, Object>> kafkaConsumerFactory) {
		ConcurrentKafkaListenerContainerFactory<Object, Object> factory = new ConcurrentKafkaListenerContainerFactory<>();
		configurer.configure(factory, kafkaConsumerFactory
				.getIfAvailable(() -> new DefaultKafkaConsumerFactory<>(this.properties.buildConsumerProperties())));
		return factory;
	}

	@Configuration(proxyBeanMethods = false)
	@EnableKafka
	@ConditionalOnMissingBean(name = KafkaListenerConfigUtils.KAFKA_LISTENER_ANNOTATION_PROCESSOR_BEAN_NAME)
	static class EnableKafkaConfiguration {

	}

}

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