ServiceDescriptor class abstract

Abstract factory-like service creator and information holder.

This class is mostly generated in end-user applications by darwin_gen or the generators of other darwin packages. However this class can and should also be manually implemented by plugins which intend to run custom services.

Implementers

ServiceDescriptorImpl

Available extensions

ResolutionExtension

Constructors

ServiceDescriptor(): const

Properties

bindingType → Type: Type to which this service is going to get bound to.
no setter
conditions → List<Condition>: Conditions required by this service.
no setter
dependencies → List<InjectorKey>: Dependencies required by this service.
no setter
hashCode → int: The hash code for this object.
no setterinherited
optional → bool: Defines if this service is optional and can be skipped.
no setter
optionalDependencies → List<InjectorKey>: Optional dependencies of this service.
no setter
publications → List<InjectorKey>: All dependencies which could be published by this service.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
serviceType → Type: Actual type of the service that will be instantiated
no setter

Methods

collectDependencies() → Iterable<InjectorKey>: Available on ServiceDescriptor, provided by the ResolutionExtension extension
Collects all required dependencies of this service and its conditions.
collectOptionalDependencies() → Iterable<InjectorKey>: Available on ServiceDescriptor, provided by the ResolutionExtension extension
Collects all optional dependencies of this service and its conditions.
instantiate(Injector injector) → Future: inherited
isSatisfied(Injector injector) → bool: Available on ServiceDescriptor, provided by the ResolutionExtension extension
Verifies if the injector provides all required dependencies.
isSolvable(Injector injector, List<InjectorKey> futurePromises) → bool: Available on ServiceDescriptor, provided by the ResolutionExtension extension
Verifies if all required dependencies are either already provided by the injector or could still become available as promised by futurePromises.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
skipDependencyCycle(Injector injector, List<InjectorKey> futurePromises) → bool: Available on ServiceDescriptor, provided by the ResolutionExtension extension
Returns if the DarwinSystemServiceMixin should wait another dependency cycle before trying to create this service, either because it is currently lacking required dependencies, or optional dependencies are still being possibly promised by futurePromises.
start(DarwinSystem system, dynamic obj) → Future<void>: The start signal handler of this service.
stop(DarwinSystem system, dynamic obj) → Future<void>: The stop signal handler of this service.
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

create(Type serviceType, FutureOr instantiate(Injector), {Type? bindingType, bool optional = false, List<InjectorKey> publications = const [], List<InjectorKey> dependencies = const [], List<InjectorKey> optionalDependencies = const [], List<Condition> conditions = const [], FutureOr<void> start(DarwinSystem, dynamic)?, FutureOr<void> stop(DarwinSystem, dynamic)?}) → ServiceDescriptor