Class SharedInterceptorRegistrations

java.lang.Object
io.micronaut.aop.beandefinition.SharedInterceptorRegistrations
@Internal public final class SharedInterceptorRegistrations extends Object
Carries the interceptors resolved for a bean from its construction to its post-construct interception.

The scenario this exists for is a bean whose advice is declared with @AroundConstruct and lifecycle interceptor bindings but no @Around, so no proxy is generated and there is no instance field in which to retain anything:

@Retention(RUNTIME)
@AroundConstruct
@InterceptorBinding(kind = InterceptorKind.POST_CONSTRUCT)
@interface Managed {}

@Singleton @Managed
class Product { @PostConstruct void init() {} }

Without sharing, construction and post-construct each resolve their own interceptor, so a @Prototype interceptor cannot carry state from one phase to the next.

A bean definition is a stateless singleton shared by every instance, so the resolved registrations cannot be kept on it. They are kept on the BeanResolutionContext instead, which is one instance for the whole of a bean's creation. The window is narrower than it looks: for a bean with constructor advice the generated doInstantiate runs post-construct interception from inside the constructor interceptor chain, so the registrations are pushed before construction and popped after it, and entries are keyed by definition so that a bean created while another is being constructed reads its own.

Destruction happens later with a fresh resolution context, so nothing is shared with it here; see MethodInterceptorChain for how pre-destroy reaches the interceptors a bean owns.

Everything here is package-private except store(BeanResolutionContext, BeanDefinition, List), which the runtime proxy path in io.micronaut.aop.runtime calls from another package.

Since:
5.2.0
Author:
Denis Stepanov

  • Method Details

    • store

      public static void store(BeanResolutionContext resolutionContext, BeanDefinition<?> definition, @Nullable List<?> registrations)
      Stores registrations resolved outside the constructor-sharing stack, such as runtime proxy definitions.
      Parameters:
      resolutionContext - The resolution context
      definition - The definition being instantiated
      registrations - The registrations
      Since:
      5.2.0