apache/dubbo-spring-boot-project

xml/注解方式定义的消费服务bean如何配合@Conditional相关注解

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#779 opened on Feb 8, 2021

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 (2 comments) (0 reactions) (0 assignees)Java (5,404 stars) (1,880 forks)batch import
help wanted

Description

如题，在@ConditionalOnBean/@ConditionalOnMissingBean下：

@ConditionalOnMissingBean(value = UserService.class, parameterizedContainer = {ReferenceBean.class})

失效，在Condition相关注解扫描beanDefination时，获取的RootBD是Reference<?>，导致不能匹配，是否在registerBD时，未考虑泛型问题？

Contributor guide

Tech stack
java
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Spring Boot conditionalsDubbo ReferenceBeanBeanDefinition scanningJava generics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
Investigate how Dubbo's ReferenceBean is registered as a bean definition in Spring Boot's auto configuration, particularly the type exposed in RootBeanDefinition. The condition annotations check the bean type including generic parameterizedContainer, but the registered type might be the raw Reference class. Look at the DubboSpringInitializer or relevant post processor to see if the generic type information is preserved. Check if there is a workaround or if the issue is a known limitation.