spring-boot 云 stream 以 Kafka 作为独立库

Question

我正在尝试将基于 spring-boot 云 stream 的库与非弹簧应用程序中的 Kafka 集成。

当这个库在另一个 Spring 应用程序中加载时，一切正常。

当我尝试使用未启用弹簧启动的应用程序初始化应用程序上下文并获取我的 bean 时，我收到以下警告和异常：

org.springframework.core.LocalVariableTableParameterNameDiscoverer - Cannot find '.class' file for class [class com.acme.common.library.spring.service.InstrumentIdLookupServiceImpl$$EnhancerBySpringCGLIB$$59e4e4ac] - unable to determine constructor/method parameter names

org.springframework.beans.factory.support.DefaultListableBeanFactory - Autowiring by type from bean name 'instrumentIdLookupServiceImpl' via constructor to bean named 'instrumentIdLookupServiceProperties'

WARN org.springframework.context.support.GenericApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.acme.common.library.spring.InstrumentIdBinding': Invocation of init method failed; nested exception is java.lang.IllegalStateException: No factory found for binding target type: org.apache.kafka.streams.kstream.KStream among registered factories: channelFactory,messageSourceFactory

No factory found for binding target type: org.apache.kafka.streams.kstream.KStream among registered factories: channelFactory,messageSourceFactory

public interface InstrumentIdBinding {
    String INSTRUMENT_IDS = "instrument-ids";

    @Input(INSTRUMENT_IDS)
    KStream<String, InstrumentIdMsg> processInstrumentId();
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="com.acme.common.library.spring"/>
</beans>

GenericApplicationContext ctx = new GenericApplicationContext();
final XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(ctx);
xmlReader.loadBeanDefinitions(new FileSystemResource("applicationContext-ext.xml"));
ctx.refresh();
InstrumentIdLookupService bean = ctx.getBean(InstrumentIdLookupService.class);

Answer 1

Spring 云 Stream 需要 Spring 引导。