June 2009
Intermediate to advanced
336 pages
9h 13m
English
Content preview from Ruby Best PracticesBecome 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,
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.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.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.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.
Working with Logger
I’m not generally a big fan of logfiles. I much prefer the immediacy of seeing problems directly reported on the screen as soon as they happen. If possible, I actually want to be thrown directly into my problematic code so I can take a look around. However, this isn’t always an option, and in certain cases, having an audit trail in the form of logfiles is as good as it’s going to get.
Ruby’s standard library logger is fairly full-featured, allowing you to log many different kinds of messages and filter them based on their severity. The API is reasonably well documented, so I won’t be spending a ton of time here going over a feature-by-feature summary of what this library offers. Instead, I’ll show you how to replicate a bit of functionality that is especially common in Ruby’s web frameworks: comprehensive error logging.
If I pull up a log from one of my Rails applications, I can easily show what I’m talking about. The following is just a small section of a logfile, in which a full request and the error it ran into have been recorded:
Processing ManagerController#call_in_sheet (for 127.0.0.1 at 2009-02-13 16:38:42) [POST] Session ID: BAh7CCIJdXNlcmkiOg5yZXR1cm5fdG8wIgpmbGFzaElDOidBY3Rpb25Db250 %0Acm9sbGVyOjpGbGFzaDo6Rmxhc2hIYXNoewAGOgpAdXNlZHsA--2f1d03dee418f4c9751925da42 1ae4730f9b55dd Parameters: {"period"=>"01/19/2009", "commit"=>"Select", "action"=>"call_in_sheet", "controller"=>"manager"} NameError (undefined local variable or method 'lunch' for #<CallInAggregator:0x2589240>): ...Become 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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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.