Annotate Conditional Field Bulletin For Free

The @Profile annotation may be used in any of the following ways: as a type-level annotation on any class directly or indirectly annotated with @Component , including @Configuration classes. as a meta-annotation, for the purpose of composing custom stereotype annotations.

It allows you to setup features based upon certain conditions like presence of a class in classparth or a JAR File which is how Spring Boot Auto-configuration works. The majority of @Conditional annotation users are, Conditions based on Bean definition or object present in the application.

In this tutorial, we'll take a look at the @Conditional annotation. It's used to indicate whether a given component is eligible for registration based on a defined condition.

@Conditional vs @Profile The use of @Conditional and Condition is is similar to selecting different profiles using @Profile but is more flexible because the conditions are specified in Java code rather than using some pre defined property flag or some system property.

Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. It's same as declaring a class with @Configuration, @EnableAutoConfiguration and @ComponentScan annotations.

Interface ConfigurationCondition For example, a condition that checks if a bean has already been registered might choose to only be evaluated during the REGISTER_BEAN ConfigurationCondition. ConfigurationPhase .

Annotation Interface Conditional Indicates that a component is only eligible for registration when all specified conditions match. A condition is any state that can be determined programmatically before the bean definition is due to be registered (see Condition for details).