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Subject [GitHub] lfz757077613 commented on issue #286: how did it work in sample without @EnableDubbo?
Date Sun, 23 Sep 2018 11:47:21 GMT
lfz757077613 commented on issue #286: how did it work in sample without @EnableDubbo?
URL: https://github.com/apache/incubator-dubbo-spring-boot-project/issues/286#issuecomment-423810659
 
 
   #### After reading source code and testing, I located the cause.
   - if we set dubbo properties in yml or properties, DubboAutoConfiguration will work. So
actually @EnableDubbo is needless, it just effect DubboComponentScan
   - If we set dubbo.scan.basePackages in properties or @EnableDubbo(scanBasePackages = "xx"),
the classes annotated by dubbo @Service will be managed by spring. But if we use yml and set
"dubbo: scan: base-packages: xx" following the wiki, a error will be thrown. Because even
if we use yml, finally the property is also got from "basePackages", so those classes annotated
by dubbo @Service will not be managed by spring meaning no privider error
   Thus, we can set this as below in yml or use properties or @EnableDubbo(scanBasePackages
= "xx") to set basePackages 
   
   ```
   dubbo:
     scan:
        basePackages : xx
   ```
   
   - PS:  If using yml or properties, there are warn log in console as below. If using @EnableDubbo(scanBasePackages
= "xx"), there is only first warn log shown.
   And I wonder why
   
   ```
   2018-09-23 19:09:06.153  WARN 6348 --- [           main] b.f.a.ServiceAnnotationBeanPostProcessor
:  [DUBBO] The BeanDefinition[Root bean: class [com.alibaba.dubbo.config.spring.ServiceBean];
scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true;
primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
of ServiceBean has been registered with name : ServiceBean:defaultDemoService:com.alibaba.boot.dubbo.demo.consumer.DemoService:${demo.service.version},
dubbo version: 2.6.2, current host: 192.168.199.223
   
   2018-09-23 19:09:06.154  WARN 6348 --- [           main] o.s.c.a.ConfigurationClassPostProcessor
 : Cannot enhance @Configuration bean definition 'com.alibaba.boot.dubbo.autoconfigure.DubboAutoConfiguration'
since its singleton instance has been created too early. The typical cause is a non-static
@Bean method with a BeanDefinitionRegistryPostProcessor return type: Consider declaring such
methods as 'static'.
   
   ```

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