[Redis] Redis client: Timeouts !

Steffen Mueller smueller at cpan.org
Thu Dec 26 23:30:54 GMT 2013

Hi dams,

On 12/26/2013 11:28 PM, Damien Krotkine wrote:
> I've just pushed new code in the git master branch. It contains timeouts
> related features. Now you can creates a Redis client with connection,
> read and write timeouts:
> my $redis = Redis->new(
>      cnx_timeout => 60,      # connection timeout (in seconds)
>      read_timeout => 0,5,    # read timeout (in seconds)
>      write_timeout => 1.2,    # write timeout (in seconds)
> );
> I haven't yet released it on CPAN, I'd like to do a developer release
> first (but I'm not sure how to do that with dzil). Anyway please feel
> free to test it and let me know of any issues. The code uses 2
> strategies, on mac and linux it uses setsockopt to set read / write
> timeouts, on other OS it uses 'select'. I plan to extend the setsockopt
> strategies to more OS.

Reading the change and having another look at IO::Socket::Timeout, I 
have some concerns about the implementation. IO::Socket::Timeout 
implements a function "new::with::timeout" (and 
socketpair::with::timeout) which is then to be called as a fully 
qualified method on a compatible class.

That's a real hack. For those reading along that might not immediately 
see what's going on: This completely bypasses method dispatch and 
subverts Perl's object model. new::with::timeout is the "timeout" 
function in the "new::with" namespace. $class->new::with::timeout is 
exactly the same as calling a fully qualified function with a string 
argument "new::with::timeout($class)". There's not method dispatch 
happening and another namespace is somewhat subtly polluted.

Surely, there's a less invasive and less 
likely-to-make-somebody-lose-days-debugging way of implementing this?


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