使用 Spring Boot 2.2+，当应用程序不在云平台上运行时，如何创建 bean

Question

In Spring Boot 2.2 there is an annotation @ConditionalOnCloudPlatform which can be used to detect whether the application is running on a Cloud Platform.

I have the reverse issue - I want to not run a bean which is running on a Cloud Platform. For example, I have code which I don't want to run when running on Kubernetes (as the platform where I run Kubernetes already supplies the functions in the given bean).

What's the best approach to do this? I feel like I need a @ConditionalOnCloudPlatform annotation.

Thanks.

Answer 1

Use @ ConditionalOnMissingBean with the name of Kubernetes bean of @ ConditionalOnMissingClass with one of bean's (or related) classes.

Answer 2

Solution 1

It seems you are using Spring Cloud Kubernetes . If so, when an application runs as a pod inside Kubernetes a Spring profile named 'kubernetes' is automatically get activated.

@Component
@Profile("!kubernetes")
public class MyLocalTestBean {}

Solution 2

Invert condition using NonNestedConditions (the code below is not verified)

class ConditionalOnNotInCloud extends NoneNestedConditions {

    ConditionalOnNotInCloud() {
        super(ConfigurationPhase.PARSE_CONFIGURATION);
    }

    @ConditionalOnCloudPlatform
    static class OnCloudCondition {
    }
}

@Bean
@Conditional(ConditionalOnNotInCloud.class)
public StubBean createStubBean() {}