June 2016
Intermediate to advanced
470 pages
9h 49m
English
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Decouple your code using a cross-platform publish/subscribe mechanism
The publish/subscribe pattern, also known as Observer, is a very popular design pattern. It comes under a lot of different names, but the final scope is always the same: alert someone when something interesting happens to it. In this recipe, we'll see some utilization of the TMessageManager class, the publish/subscribe mechanism implemented in the System.Messaging.pas unit.
Getting ready…
What exactly does the cross-platform TMessageManager class do? Put simply, it allows you to listen for events and assign actions to run when those events occur. Just like in VCL or FireMonkey, you know about mouse and keyboard events that occur on certain user interactions. These are very similar, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.