October 2012
Intermediate to advanced
504 pages
13h 22m
English
book
Professional ASP.NET MVC 4
by Jon Galloway, Phil Haack, Brad Wilson, K. Scott Allen, Scott Hanselman
Content preview from Professional ASP.NET MVC 4Become 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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Tracing the Application
One of the most challenging things with remotely deployed code is debugging when something has gone wrong. Web API enables a very rich automatic tracing ecosystem that is turned off by default but can be enabled by the developer as needed. The built-in tracing functionality wraps many of the built-in components and can correlate data from individual requests as it moves throughout the layers of the system.
The central part of tracing is the ITraceWriter service. Web API does not ship with any implementations of this service, as it is anticipated that developers will likely already have their own favorite tracing system (such as ETW, log4net, ELMAH, or many others). Instead, Web API looks on startup to see if an implementation of ITraceWriter is available in the service list, and if so, automatically begins tracing all requests. The developer must choose how best to store and browse this trace information — typically, by using the configuration options provided by their chosen logging system.
Application and component developers can also add tracing support to their systems by retrieving the ITraceWriter service and, if it's not null, writing tracing information to it. The core ITraceWriter interface only contains a single Trace method, but there are several extension methods which are designed to make it easy to trace different levels of messages (debug, info, warning, error, and fatal messages) as well as helpers to trace entry and exit to both synchronous ...
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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.