News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Josh Adell's Blog:
Command Invoker Pattern with the Open/Closed Principle
January 16, 2012 @ 10:04:42

In a response to a recent post on DZone.com about the "Open/Closed Principle" Josh Adell has posted an example of a " flexible and extendable command invocation solution" implementing this SOLID idea.

Let's overcome some of these issues [with only being able to extend the invoker class and that the invoker needs to know how to create commands], and also make the code even more extensible. I'll use a simplified command invoker to demonstrate.

His code is included - the creation of a "Command" interface and two comments that implement it: "HelloCommand" and "PwdCommand", each with "register" and "execute" methods. His "Invoker" class then only needs to be told how to map these commands and the "register" is called as they're needed. You can find the full example code for this invocation example in this gist.

0 comments voice your opinion now!
command designpattern invoke open closed principle solid tutorial


blog comments powered by Disqus

Similar Posts

Stoyan Stefanov's Blog: phpBB front-end optimization - 1 hour workshop

DevShed: Constructing Multi-Line PDF Documents with PHP 5

DevShed: Am Introduction to PHP Security

Community News: Zend Releases Speaker List for ZendCon 2006

James Morris' Blog: A Symfony2 Console Command and the Foursquare API Venuehistory


Community Events

Don't see your event here?
Let us know!


performance release series voicesoftheelephpant example php7 introduction library extension conference version opinion podcast community laravel framework interview symfony2 api xdebug

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework