ICommandHandler<TCommand extends ICommand<TResult>, TResult> class abstract interface

Implement to create a handler for your custom ICommand implementation.

// Create a new handler for your command, each command should get one, and only one handler.
// Multiple return types might be supported in the future.
class ConvertToStringCommandHandler
    implements ICommandHandler<ConvertToStringCommand, String> {
  @override
  Future<String> handle(ConvertToStringCommand request) {
    // Put your handler implementation here.
    // Handlers are async by default to allow for future middleware support.
    String result = request.number.toString();
    return Future.value(result);
  }
}

I recommend creating an extension method for your handler too, (this will hopefully be code-generated in the future):

extension ConvertToStringCommandMediator on Mediator {
  Future<String> convertToString(int number) {
    return runCommand(ConvertToStringCommand(number));
  }
}

void main() async {
  // Create a new mediator, this should only be needed once per your application.
  Mediator mediator = Mediator();

  // Register the query handler for its query type.
  // This will hopefully be code-generated later on.
  mediator.registerCommand(ConvertToStringQueryHandler());

  // If you implemented the optional extension method, then you can do this instead.
  String result = await mediator.convertToString(123);
  print(result);
}

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

handle(TCommand request) → Future<TResult>

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