dependency-injection - 多个 Spring 数据源：考虑定义 ExternalJarRepository 类型的 bean

Question

@SpringBootApplication
@EnableJpaRepositories(basePackages=..,entityManagerRef=..)
@ComponentScan("com.main", "com.external.jar")
public class Application{
...
//methods defining primary datasource, transaction manager, entityManagerFactoryBean
}

外罐

@Configuration
@EnableJpaRepositories(basePackages="com.external.model", entityManagerRef=.., transactionManager=..)
public class ExternalDataConfig{

//methods defining datasource, transaction manager, entityManagerFactoryBean

}

public DataRepository extends CrudRepository<T,ID>{}

@Service 
public class ExternalService{
@Autowire
private DataRepository externalRepository;
}

错误 Field externalRepository in com.external.jar.ExternalService required a bean of type DataRepository'

但是，日志表明成功扫描了默认和外部存储库，不确定为什么依赖注入机制无法找到 bean

.s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
.s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
.s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 55ms. Found 3 JPA repository interfaces.
.s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
.s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
.s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 75ms. Found 21 JPA repository interfaces.

Answer 1

事实证明，默认应用程序也有一个名称为 bean，DataRepository并且应用程序设置允许 bean 覆盖

spring:
  main:
    allow-bean-definition-overriding: true

在外部依赖中重命名DataRepositorybean 就可以了