[swift-evolution] Preconditions aborting process in server scenarios [was: Throws? and throws!]

[David Waite]

My interpretation is that he was advocating a future where a precondition’s failure killed less than the entire process. Instead, shut down some smaller portion like a thread, actor, or container like .Net's app domains (which for those more familiar with Javascript could be loosely compared with Web Workers).

Today - if you wanted a Swift server where overflowing addition didn’t interrupt your service for multiple users, you would need to use something like a pre-fork model (with each request handled by a separate swift process)

That's the difference between CLI and desktop apps where the process is providing services for a single user, and a server where it may be providing a service for thousands or millions of users.

-DW

> On Jan 16, 2017, at 2:32 PM, Callionica (Swift) via swift-evolution <swift-evolution at swift.org> wrote:
> 
> One stray thread performing an overflowing addition can be the difference between a secure system and an insecure one. Better to take the process down.
> 
> -- Callionica
> 
> On Sun, Jan 15, 2017 at 10:48 PM Russ Bishop via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> 
> 
> I don’t think it makes sense to abort a server process (potentially dropping X threads and thousands of connections on the ground) because one stray thread performed an overflowing addition… 
> 
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