I use Linux on the desktop (currently Ubuntu), but occasionally need to use Windows for things like webinars, OS-specific testing, etc. I started using VirtualBox for virtualization around six months ago, and have been reasonably satisfied; Windows boots quickly, and everything "just works." That is, until yesterday.
I was given a linux VM image running a web server and some applications I needed to review. On top of that, I needed to do so over WebEx, so that I could share my screen with somebody else. This meant I needed the following to work:
I'm really not sure I understand these "seven things" or "tagged" memes, but I'm going to give it a shot, after Keith Casey did a drive-by tagging of me on New Year's Eve.
So, without further ado, seven things you may not know about me…
That time of year again — wrap-up time. Each year, it seems like it's the busiest ever, and I often wonder if it will ever slow down. As usual, I'm restricting myself to primarily professional activities out of respect for the privacy of my family.
The short, executive summary:
Read on for the gruesome, month-by-month breakdown.
In the last two entries in this series on models, I covered using forms as input filters and integrating ACLs into models. In this entry, I tackle some potential infrastructure for your models.
The Model is a complex subject. However, it is often boiled down to either a single model class or a full object relational mapping (ORM). I personally have never been much of a fan of ORMs as they tie models to the underlying database structure; I don't always use a database, nor do I want to rely on an ORM solution too heavily on the off-chance that I later need to refactor to use services or another type of persistence store. On the other hand, the model as a single class is typically too simplistic.
In my last post, I discussed using Zend_Form as a combination input filter/value object within your models. In this post, I'll discuss using Access Control Lists (ACLs) as part of your modelling strategy.
ACLs are used to indicate who has access to do what on a given resource. In the paradigm I will put forward, your resource is your model, and the what are the various methods of the model. If you finesse a bit, you'll have "user" objects that act as your who.
Just like with forms, you want to put your ACLs as close to your domain logic as possible; in fact, ACLs are part of your domain.
A number of blog posts have sprung up lately in the Zend Framework community discussing the Model in the Model-View-Controller pattern. Zend Framework has never had a concrete Model class or interface; our stand has been that models are specific to the application, and only the developer can really know what would best suit it.
Many other frameworks tie the Model to data access — typically via the ActiveRecord pattern or a Table Data Gateway — which completely ignores the fact that this is tying the Model to the method by which it is persisted. What happens later if you start using memcached? or migrate to an SOA architecture? What if, from the very beginning, your data is coming from a web service? What if you do use a database, but your business logic relies on associations between tables?
While the aforementioned posts do an admirable job of discussing the various issues, they don't necessarily give any concrete approaches a developer can use when creating their models. As such, this will be the first in a series of posts aiming to provide some concrete patterns and techniques you can use when creating your models. The examples will primarily be drawing from Zend Framework components, but should apply equally well to a variety of other frameworks.
I've been playing a lot with Dojo lately, and have been very impressed by its elegant publish-subscribe system. Basically, any object can publish an event, and any other object can subscribe to it. This creates an incredibly flexible notification architecture that's completely opt-in.
The system has elements of Aspect Oriented Programming (AOP), as well as the Observer pattern. Its power, however, is in the fact that an individual object does not need to implement any specific interface in order to act as either a Subject or an Observer; the system is globally available.
Being a developer who recognizes good ideas when he sees them, of course I decided to port the idea to PHP. You can see the results on github.
I've fielded several questions about setting up an autocompleter with Zend Framework and Dojo, and decided it was time to create a HOWTO on the subject, particularly as there are some nuances you need to pay attention to.
I've been using IRC regularly for the past six to nine months, in large part
due to the growing ZF community on the Freenode
#zftalk channel (unfortunately, I simply don't have time to be in that
particular channel any more, but you can generally find me in #zftalk.dev),
but also to keep in contact with other peers, friends, and colleagues.
One difficulty, however, is keeping productivity high while staying on IRC. To me, the ultimate client would provide me notifications when somebody mentions my name or a watch word — allowing me to read the channel at my leisure, yet still respond to people in a timely fashion.
Just about every day, I have an idea for a blog post, and most days, by the end of the day, I just don't have the time or energy to actually write anything up. The inner writer in me screams, "no excuses!" while the aging adult in me whispers, "time for bed, dear."
So, to keep my hand in the game, here are a few things running through my head, or that I'm working on, or that I'll be doing soon.