01-intro-to-futures.cfc

/**
 * This exercise goes over:
 *     + creating new Futures
 *     + running Futures
 *     + waiting for Futures to complete
 *     + Assigning timeouts and default values to Futures
 *
 * You can run this exercise from the root in CommandBox by running:
 *     `task run exercises/01-intro-to-futures.cfc`
 *
 * You can use the `print` helper provided by CommandBox to log messages.
 * (Use `print.line( "message" ).toConsole()` if you're not familiar with it.)
 * Make sure to end with `.toConsole()` so your message is flushed
 * to the console the moment it is printed.
 */
component extends="../BaseTask" {

	/**
	 * Create a future that prints out a greeting immediately.
	 */
	function partOne(){
		return;
	}

	/**
	 * Create a future that prints out a greeting after 2 seconds.
	 */
	function partTwo(){
		return;
	}

	/**
	 * Create a future that _returns_ a message to print out after 5 seconds.
	 * Print out that message on the main thread.
	 */
	function partThree(){
		return;
	}

	/**
	 * Create a future that _returns_ a message to print out after 5 seconds.
	 * Wait for a 3 second timeout before returning a default value.
	 * Print out that message on the main thread.
	 */
	function partFour(){
		return;
	}

	/**
	 * Create a future that _returns_ a message to print out after 5 seconds.
	 * Wait for a 3 second timeout. Do not return a default value.
	 * See what happens on the main thread
	 *     - when you do not wait for the future to complete?
	 *     - when you wait for the future to complete?
	 */
	function partFive(){
		return;
	}

	function run(){
		print.blueLine( "Running all `01-intro-to-futures` exercises" ).toConsole();
		print
			.yellowLine( "Press Ctrl-C to exit" )
			.line()
			.toConsole();

		partOne();
		partTwo();
		partThree();
		partFour();
		partFive();

		while ( true ) {
			sleep( 100 );
		}
	}

}