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. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

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 non-existent method or property is accessed. [...]
inherited
toString() String
Returns 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