org.springframework.boot.autoconfigure.kafka.KafkaStreamsAnnotationDrivenConfiguration Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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
*
* http://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 java.util.Map;
import org.apache.kafka.streams.StreamsBuilder;
import org.apache.kafka.streams.StreamsConfig;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.source.InvalidConfigurationPropertyValueException;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.kafka.annotation.KafkaStreamsDefaultConfiguration;
import org.springframework.kafka.config.KafkaStreamsConfiguration;
import org.springframework.kafka.config.StreamsBuilderFactoryBean;
/**
* Configuration for Kafka Streams annotation-driven support.
*
* @author Gary Russell
* @author Stephane Nicoll
*/
@Configuration
@ConditionalOnClass(StreamsBuilder.class)
@ConditionalOnBean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_BUILDER_BEAN_NAME)
class KafkaStreamsAnnotationDrivenConfiguration {
private final KafkaProperties properties;
KafkaStreamsAnnotationDrivenConfiguration(KafkaProperties properties) {
this.properties = properties;
}
@ConditionalOnMissingBean
@Bean(KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
public KafkaStreamsConfiguration defaultKafkaStreamsConfig(Environment environment) {
Map streamsProperties = this.properties.buildStreamsProperties();
if (this.properties.getStreams().getApplicationId() == null) {
String applicationName = environment.getProperty("spring.application.name");
if (applicationName == null) {
throw new InvalidConfigurationPropertyValueException(
"spring.kafka.streams.application-id", null,
"This property is mandatory and fallback 'spring.application.name' is not set either.");
}
streamsProperties.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationName);
}
return new KafkaStreamsConfiguration(streamsProperties);
}
@Bean
public KafkaStreamsFactoryBeanConfigurer kafkaStreamsFactoryBeanConfigurer(
StreamsBuilderFactoryBean factoryBean) {
return new KafkaStreamsFactoryBeanConfigurer(this.properties, factoryBean);
}
// Separate class required to avoid BeanCurrentlyInCreationException
static class KafkaStreamsFactoryBeanConfigurer implements InitializingBean {
private final KafkaProperties properties;
private final StreamsBuilderFactoryBean factoryBean;
KafkaStreamsFactoryBeanConfigurer(KafkaProperties properties,
StreamsBuilderFactoryBean factoryBean) {
this.properties = properties;
this.factoryBean = factoryBean;
}
@Override
public void afterPropertiesSet() {
this.factoryBean.setAutoStartup(this.properties.getStreams().isAutoStartup());
}
}
}