Module io.helidon.inject.api

Package io.helidon.inject.api

Interface Injector

public interface Injector

Used to perform programmatic activation and injection.

Note that the reference implementation of Injection only performs non-reflective, compile-time generation of service activators for services that it manages. This Injector contract is mainly provided in order to allow other library extension implementations to extend the model to perform other types of injection point resolution.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	Injector.Strategy	The strategy the injector should attempt to apply.

Method Summary

Modifier and Type	Method	Description
<T> ActivationResult	activateInject(T serviceOrServiceProvider, InjectorOptions opts)	Called to activate and inject a manage service instance or service provider, putting it into Phase.ACTIVE.
<T> ActivationResult	deactivate(T serviceOrServiceProvider, InjectorOptions opts)	Called to deactivate a managed service or service provider, putting it into Phase.DESTROYED.

Method Details

activateInject

<T> ActivationResult activateInject(T serviceOrServiceProvider,
 InjectorOptions opts)
                             throws InjectionServiceProviderException

Called to activate and inject a manage service instance or service provider, putting it into Phase.ACTIVE.

Type Parameters:

T - the managed service type

Parameters:

serviceOrServiceProvider - the target instance or service provider being activated and injected

opts - the injector options

Returns:

the result of the activation

Throws:

InjectionServiceProviderException - if an injection or activation problem occurs

See Also:

• Activator

deactivate

<T> ActivationResult deactivate(T serviceOrServiceProvider,
 InjectorOptions opts)
                         throws InjectionServiceProviderException

Called to deactivate a managed service or service provider, putting it into Phase.DESTROYED. If a managed service has a PreDestroy annotated method then it will be called during this lifecycle event.

Type Parameters:

T - the managed service type

Parameters:

serviceOrServiceProvider - the service provider or instance registered and being managed

opts - the injector options

Returns:

the result of the deactivation

Throws:

InjectionServiceProviderException - if a problem occurs

See Also:

• DeActivator