spring-kafka KafkaBootstrapConfiguration 源码
spring-kafka KafkaBootstrapConfiguration 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaBootstrapConfiguration.java
/*
* Copyright 2002-2019 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.annotation;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.kafka.config.KafkaListenerConfigUtils;
import org.springframework.kafka.config.KafkaListenerEndpointRegistry;
/**
* An {@link ImportBeanDefinitionRegistrar} class that registers a {@link KafkaListenerAnnotationBeanPostProcessor}
* bean capable of processing Spring's @{@link KafkaListener} annotation. Also register
* a default {@link KafkaListenerEndpointRegistry}.
*
* <p>This configuration class is automatically imported when using the @{@link EnableKafka}
* annotation. See {@link EnableKafka} Javadoc for complete usage.
*
* @author Stephane Nicoll
* @author Gary Russell
* @author Artem Bilan
*
* @see KafkaListenerAnnotationBeanPostProcessor
* @see KafkaListenerEndpointRegistry
* @see EnableKafka
*/
public class KafkaBootstrapConfiguration implements ImportBeanDefinitionRegistrar {
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
if (!registry.containsBeanDefinition(
KafkaListenerConfigUtils.KAFKA_LISTENER_ANNOTATION_PROCESSOR_BEAN_NAME)) {
registry.registerBeanDefinition(KafkaListenerConfigUtils.KAFKA_LISTENER_ANNOTATION_PROCESSOR_BEAN_NAME,
new RootBeanDefinition(KafkaListenerAnnotationBeanPostProcessor.class));
}
if (!registry.containsBeanDefinition(KafkaListenerConfigUtils.KAFKA_LISTENER_ENDPOINT_REGISTRY_BEAN_NAME)) {
registry.registerBeanDefinition(KafkaListenerConfigUtils.KAFKA_LISTENER_ENDPOINT_REGISTRY_BEAN_NAME,
new RootBeanDefinition(KafkaListenerEndpointRegistry.class));
}
}
}
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