Module io.helidon.service.registry

Package io.helidon.service.registry

Interface ServiceDescriptor<T>

Type Parameters:

T - type of the described service

All Superinterfaces:

Comparable<Weighted>, ServiceInfo, Weighted

All Known Implementing Classes:

ExistingInstanceDescriptor, VirtualDescriptor

public interface ServiceDescriptor<T>
extends ServiceInfo

A descriptor of a service. In addition to providing service metadata, this also allows instantiation of the service instance, with dependent services as parameters.

Field Summary

Fields inherited from interface io.helidon.common.Weighted

DEFAULT_WEIGHT

Method Summary

Modifier and Type	Method	Description
default void	inject(DependencyContext ctx, InterceptionMetadata interceptionMetadata, Set<String> injected, T instance)	Inject fields and methods.
default Object	instantiate(DependencyContext ctx, InterceptionMetadata interceptionMetadata)	Create a new service instance.
default void	postConstruct(T instance)	Invoke Service.PostConstruct annotated method(s).
default void	preDestroy(T instance)	Invoke Service.PreDestroy annotated method(s).
default TypeName	scope()	Scope of this service.

Methods inherited from interface io.helidon.service.registry.ServiceInfo

contracts, dependencies, descriptorType, factoryContracts, factoryType, isAbstract, providedType, qualifiers, runLevel, serviceType

Methods inherited from interface io.helidon.common.Weighted

compareTo, weight

Method Details

instantiate

default Object instantiate(DependencyContext ctx,
 InterceptionMetadata interceptionMetadata)

Create a new service instance.

Parameters:

ctx - dependency context with all dependencies of this service

interceptionMetadata - metadata handler for interception

Returns:

a new instance, must be of the type T or a subclass

inject

default void inject(DependencyContext ctx,
 InterceptionMetadata interceptionMetadata,
 Set<String> injected,
 T instance)

Inject fields and methods.

Parameters:

ctx - injection context

interceptionMetadata - interception metadata to support interception of field injection

injected - mutable set of already injected methods from subtypes

instance - instance to update

postConstruct

default void postConstruct(T instance)

Invoke Service.PostConstruct annotated method(s).

Parameters:

instance - instance to use

preDestroy

default void preDestroy(T instance)

Invoke Service.PreDestroy annotated method(s).

Parameters:

instance - instance to use

scope

default TypeName scope()

Scope of this service.

Specified by:

scope in interface ServiceInfo

Returns:

scope of the service