September 2008
Intermediate to advanced
660 pages
20h 32m
English
Content preview from Programming Flex 3Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 18. Application Debugging
One of the strengths of Flex is its modern debugging capabilities. Debugging client-side code in web applications has traditionally been cumbersome. The Flash Debug Player, provided with Flex, allows developers the ability to debug applications in the same way they have been accustomed to with other modern development platforms.
In this chapter, we will cover runtime errors, debugging applications using FDB, debugging applications using the Flex Builder debugger, remote debugging, and tracing and logging.
The Flash Debug Player
The Flash Debug Player is at the core of the debugging capabilities provided to Flex. The Debug Player provides several benefits specific to developers and is required for most types of debugging you will need to do. The browser plug-in and standalone editions of the Debug Player are included in the free SDK in the /runtimes/player folder, and in the <Path to Flex Builder 3>/Player folder if you are using Flex Builder 3. Also, if you installed Flex Builder, the Debug Player browser plug-in is typically installed during the install process. You can always check to ensure that you have the latest edition of the Debug Player by visiting http://www.adobe.com/support/flashplayer/downloads.html.
If you are unsure whether you have the Debug Player installed within a browser, you can build a simple application to check the version of the player installed. Here’s an example:
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> ...
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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.
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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.