[Feature] How does Dubbo achieve the effect of Spring's @ConditionalOnMissingBean?

[java-my-life]

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Apache Dubbo Component

Java SDK (apache/dubbo)

Descriptions

TestProvider has two implementation classes, TestServiceImpl and TestServiceExtImpl. I want to use @ConditionalOnMissingBean to load TestServiceImpl if the bean does not exist. How can I do this?

`

public interface TestProvider {
String getName();
}

@ConditionalOnMissingBean(TestProvider.class)
@DubboService(interfaceClass = TestProvider.class)
public class TestServiceImpl implements TestService {
@OverRide
public String getName() {
return "getName:TestServiceImpl:";
}
}

@DubboService(interfaceClass = TestProvider.class)
public class TestServiceExtImpl extends TestServiceImpl{
@OverRide
public String getName() {
return "TestServiceExtImpl:";
}
}
`

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