Interface ICommandInterceptor


public interface ICommandInterceptor
An interface for stackable command interceptors, which can extend and modify the command call chain.

This mechanism can be used for authentication, logging, and other functions.

See Also:
  • Method Details

    • getName

      String getName(ICommand command)
      Gets the name of the wrapped command.

      The interceptor can use this method to override the command name. Otherwise it shall just delegate the call to the wrapped command.

      Parameters:
      command - the next command in the call chain.
      Returns:
      the name of the wrapped command.
    • execute

      Object execute(String correlationId, ICommand command, Parameters args) throws ApplicationException
      Executes the wrapped command with specified arguments.

      The interceptor can use this method to intercept and alter the command execution. Otherwise it shall just delete the call to the wrapped command.

      Parameters:
      correlationId - optional transaction id to trace calls across components.
      command - the next command in the call chain that is to be executed.
      args - the parameters (arguments) to pass to the command for execution.
      Returns:
      execution result.
      Throws:
      ApplicationException - when execution fails for whatever reason.
      See Also:
    • validate

      List<ValidationResult> validate(ICommand command, Parameters args)
      Validates arguments of the wrapped command before its execution.

      The interceptor can use this method to intercept and alter validation of the command arguments. Otherwise it shall just delegate the call to the wrapped command.

      Parameters:
      command - the next command in the call chain to be validated against.
      args - the parameters (arguments) to validate.
      Returns:
      an list of ValidationResults.
      See Also: