InterceptedCommand class

Implements a ICommand command wrapped by an interceptor. It allows to build command call chains. The interceptor can alter execution and delegate calls to a next command, which can be intercepted or concrete. See ICommand See ICommandInterceptor

Example

class CommandLogger implements ICommandInterceptor {
    String getName(ICommand command) {
        return command.getName();
    }
    void execute(String correlationId, ICommand command , Parameters args,) async {
        print('Executed command ' + command.getName());
        return await command.execute(correlationId, args);
    }
    List<ValidationResult> validate(ICommand command, Parameters args) {
        return command.validate(args);
    }
}
var logger =  CommandLogger();
var loggedCommand =  InterceptedCommand(logger, command);
// Each called command will output: Executed command <command name>

Implemented types

• ICommand

Constructors

InterceptedCommand(ICommandInterceptor interceptor, ICommand next)

Creates a new InterceptedCommand, which serves as a link in an execution chain. Contains information about the interceptor that is being used and the next command in the chain.

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

execute(String? correlationId, Parameters args) → Future

Executes the next command in the execution chain using the given Parameters parameters (arguments).

override

getName() → String

Returns the name of the command that is being intercepted.

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 Parameters parameters (arguments) that are to be passed to the command that is next in the execution chain.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited