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PODo ASP.NET developers really need to be concerned with thread safety?
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  1. PODo ASP.NET developers really need to be concerned with thread safety?
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    copied!<p>I consider myself aware of the concepts of threading and why certain code is or isn’t “thread-safe,” but as someone who primarily works with ASP.NET, threading and thread safety is something I rarely think about. However, I seem to run across numerous comments and answers (not necessarily for ASP.NET) on Stack Overflow to the effect of “<strong><em>warning – that’s not thread-safe!</em></strong>,” and it tends to make me second guess whether I’ve written similar code that actually could cause a problem in my applications. [shock, horror, etc.] So I’m compelled to ask:</p> <p><strong>Do ASP.NET developers <em>really</em> need to be concerned with thread safety?</strong></p> <p>My Take: While a web application is inherently multi-threaded, each particular request comes in on a single thread, and all <em>non-static</em> types you create, modify, or destroy are exclusive to that single thread/request. If the request creates an instance of a DAL object which creates an instance of a business object and <a href="https://stackoverflow.com/questions/350502/initialize-a-collection-within-an-object/350585#350585">I want to lazy-initialize a collection within this object</a>, <em>it doesn’t matter</em> if it’s not thread-safe, because it will never be touched by another thread. ...Right? (Let’s assume I’m not starting a new thread to kick off a long-running asynchronous process during the request. I’m well aware that changes everything.)</p> <p>Of course, static classes, methods and variables are just the opposite. They are shared by <em>every</em> request, and the developer must be very careful not to have “unsafe” code that when executed by one user, can have an unintended effect on all others.</p> <p>But that’s about it, and thus thread safety in ASP.NET mostly boils down to this: Be careful how you design and use statics. Other than that, you don’t need to worry about it much at all. </p> <p>Am I wrong about any of this? Do you disagree? Enlighten me!</p>
 

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