@Singleton @Retention(value=RUNTIME) @Documented public @interface Factory
A factory is a Singleton
that produces one or many other bean implementations.
Each produced bean is defined by method that is annotated with Bean
@Factory public class MyFactory { @Bean public MyBean myBean() { // create the bean } }
Methods defined within the body of the class that are annotated with Bean
will be exposed as beans.
You can use a Scope
annotation to control the scope the bean is exposed within. For example for a
singleton instance you can annotation the method with Singleton
.
Methods annotated with Bean
can accept arguments and Micronaut will attempt to inject those arguments from existing beans or values. For example:
@Factory public class MyFactory { @Bean public MyBean myBean(@Value("foo.bar") String myValue) { // create the bean } }
Bean
,
Configuration