NYCPHP Meetup

[anoland]

On 08/20/2010 04:27 PM, Matt Juszczak wrote:
>> I get the use of triggers but can you explain the queue concept? 
>> Let's say I want to be notified every time the count of
>> an item is increased. How would a queue play into that?
>
> Have a trigger create a record in the event queue, and then have a 
> process that runs to process the queue (could be a cron, or a daemon) 
> and send out emails, etc.
>
> -Matt

Not to discount Matt's solution; it is a good one. But for the sake of 
completeness: you could also use the observer pattern here.

Some articles about it.
http://devzone.zend.com/article/12229
http://www.phpro.org/tutorials/Design-Patterns.html#6
http://www.fluffycat.com/PHP-Design-Patterns/Observer/