Spring 注释驱动配置中的 NoUniqueBeanDefinitionException

Question

尝试使用

自动装配两个 bean 时出现以下错误

No qualifying bean of type [javax.jms.ConnectionFactory] is defined: expected single matching bean but found 2: aConnectionFactory, bConnectionFactory

Description:

Parameter 1 of method jmsListenerContainerFactory in org.springframework.boot.autoconfigure.jms.JmsAnnotationDrivenConfiguration required a single bean, but 2 were found:
        - aConnectionFactory: defined by method 'aConnectionFactory' in package.Application
        - bConnectionFactory: defined by method 'bConnectionFactory' in package.Application


Action:

Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

我有这个注解驱动的配置：

@SpringBootApplication
@EnableIntegration
@IntegrationComponentScan
public class Application  extends SpringBootServletInitializer implements
 WebApplicationInitializer {

    @Resource(name = "aConnectionFactory")
    private ConnectionFactory aConnectionFactory;

    @Resource(name = "bConnectionFactory")
    private ConnectionFactory bConnectionFactory;

    @Bean
    public IntegrationFlow jmsInboundFlow() {
        return IntegrationFlows
                    .from(
                        Jms.inboundAdapter(aConnectionFactory)
                                            .destination(aQueue),
                        e -> e.poller( Pollers.fixedRate(100, 
TimeUnit.MILLISECONDS).maxMessagesPerPoll(100))
                     ).channel("entrypoint")
                     .get();
}

   @Bean
    public IntegrationFlow jmsInboundFlowB() {
        return IntegrationFlows
                    .from(
                        Jms.inboundAdapter(bConnectionFactory)
                                            .destination(bQueue),
                        e -> e.poller( Pollers.fixedRate(100, 
TimeUnit.MILLISECONDS).maxMessagesPerPoll(100))
                     ).channel("entrypoint")
                     .get();
}


    @Bean(name = "aConnectionFactory")
    @Profile({"weblogic"})
    public ConnectionFactory aConnectionFactory() {
        ConnectionFactory factory = null;
        JndiTemplate jndi = new JndiTemplate();
        try {
          factory = (ConnectionFactory) jndi.lookup("jms/ConnectionFactory");
        } catch (NamingException e) {
            logger.error("NamingException for jms/ConnectionFactory", e);
        }

        return factory;
    }

    @Bean(name = "bConnectionFactory")
    @Profile({"weblogic"})
    public ConnectionFactory bConnectionFactory() {
        ConnectionFactory factory = null;
        JndiTemplate jndi = new JndiTemplate();
        try {
          factory = (ConnectionFactory) jndi.lookup("jms/ConnectionFactory");
        } catch (NamingException e) {
            logger.error("NamingException for jms/ConnectionFactory", e);
        }

        return factory;
    }

}

知道这段代码有什么问题吗？这似乎很简单，但是指定限定符不起作用，我也尝试过使用@Resource。我在那里错过了什么？

感谢任何帮助。

Answer 1

问题在于

javax.jms.ConnectionFactory是单例，需要一个对象！

您的问题的解决方案：

如果您需要两个创建对象和扩展 ConnectionFactory 的对象他们根据需要更改范围。
试试@Scope("singleton") 或@Scope("prototype").
如果您收到错误，请创建一个对象。然后使用范围 @Scope("singleton")
"Other Two" 毁容另一个已经在使用和设置这样的 class。

Answer 2

你的代码没有问题。

那只是 JmsAnnotationDrivenConfiguration 来自 Spring Boot，它不喜欢你的两个 ConnectionFactory bean，但只需要一个。

为什么不遵循该报告的建议并用 @Primary 标记其中之一？
您似乎没有使用 Spring Boot JMS 自动配置功能，因此可以直接禁用 JmsAnnotationDrivenConfiguration：http://docs.spring.io/spring-boot/docs/1.4.1.RELEASE/reference/htmlsingle/#using-boot-disabling-specific-auto-configuration

Spring 注释驱动配置中的 NoUniqueBeanDefinitionException

NoUniqueBeanDefinitionException in Spring annotation driven configuration

spring

spring-integration

spring-annotations