Spring annotation conditionalOnBean not working

Question

I defined a class with annotation Configuration

    @Configuration
    @AutoConfigureAfter(EndpointAutoConfiguration         


        

Answer 1

The javadoc for @ConditionalOnBean describes it as:

Conditional that only matches when the specified bean classes and/or names are already contained in the BeanFactory.

In this case, the key part is "already contained in the BeanFactory". Your own configuration classes are considered before any auto-configuration classes. This means that the auto-configuration of the MetricsEndpoint bean hasn't happened by the time that your own configuration is checking for its existence and, as a result, your MetricsFormatEndpoint bean isn't created.

One approach to take would be to create your own auto-configuration class for your MetricsFormatEndpoint bean and annotate it with @AutoConfigureAfter(EndpointAutoConfiguration.class). That will ensure that its conditions are evaluated after the MetricsEndpoint bean has been defined.

Answer 2

ConditionalOnClass worked as well.

Javadoc said that AutoConfigureAfter should be applied after other specified auto-configuration classes.

And ConditionalOnClass matches when the specified classes are on the classpath. I think it's properer