spring-kafka EnableKafkaStreams 源码
spring-kafka EnableKafkaStreams 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/annotation/EnableKafkaStreams.java
/*
* Copyright 2016-2019 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 java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.context.annotation.Import;
/**
* Enable default Kafka Streams components. To be used on
* {@link org.springframework.context.annotation.Configuration Configuration} classes as
* follows:
*
* <pre class="code">
* @Configuration
* @EnableKafkaStreams
* public class AppConfig {
*
* @Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
* public KafkaStreamsConfiguration kStreamsConfigs() {
* ...
* }
* // other @Bean definitions
* }
* </pre>
*
* That {@link KafkaStreamsDefaultConfiguration#DEFAULT_STREAMS_CONFIG_BEAN_NAME} is
* required to declare {@link org.springframework.kafka.config.StreamsBuilderFactoryBean}
* with the {@link KafkaStreamsDefaultConfiguration#DEFAULT_STREAMS_BUILDER_BEAN_NAME}.
* <p>
* Also to enable Kafka Streams feature you should be sure that the {@code kafka-streams}
* jar is on classpath.
*
* @author Artem Bilan
*
* @since 1.1.4
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Import(KafkaStreamsDefaultConfiguration.class)
public @interface EnableKafkaStreams {
}
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