Command class

Concrete implementation of ICommand interface. Command allows to call a method or function using Command pattern.

Example

var command =  Command('add', null, (correlationId, args) {
    var param1 = args.getAsFloat('param1');
    var param2 = args.getAsFloat('param2');
    var result = param1 + param2;
    return result;
});
result = await command.execute(
  '123',
  Parameters.fromTuples(
    ['param1', 2,
    'param2', 2]
  )).catch(err) {
    if (err!= null) print(err);
    else print('2 + 2 = ' + result);
  }
);
// Console output: 2 + 2 = 4

See ICommand See CommandSet

Implemented types

Constructors

Command(String name, Schema? schema, dynamic func)
Creates a new command object and assigns it's parameters.

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
schema_ → Schema?
final

Methods

execute(String? correlationId, Parameters args) → Future
Executes the command. Before execution it validates Parameters args using the defined schema. The command execution intercepts exceptions raised by the called function and returns them as an error in callback.
override
getName() → String
Gets the command name. Returns the name of this command.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
validate(Parameters args) → List<ValidationResult>
Validates the command Parameters args before execution using the defined schema.
override

Operators

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