Singleton class

Annotations for automatic service discovery and registration Used with build_runner for code generation Marks a class as a singleton service The service will be registered once and the same instance returned on each request

Example:

@Singleton()
class DatabaseService {
  void connect() { /* ... */ }
}

With custom name:

@Singleton(name: 'primaryDb')
class DatabaseService { /* ... */ }

Constructors

Singleton({String? name, List<Type>? asType, bool async = false})

const

Properties

asType → List<Type>?

Optional list of interfaces/abstract classes this service implements The service will be registered under these types as well

final

async → bool

Whether to register asynchronously Use when the service needs async initialization

final

hashCode → int

The hash code for this object.

no setter, inherited

name → String?

Optional name for the service instance Useful when you have multiple implementations of the same interface

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited