From: Nathan <njmacinnes@...>
Date: 2010-04-07T23:53:05+09:00
Subject: Re: modifying a Hash in one process when .each is running in another

> Do you really want generate_list_objects to run 4 times uselessly while
> the test suite runs the original set of tests?

I think you've misunderstood... sorry if I wasn't clear. Perhaps
naming the method test was a bad idea. I don't mean test as in unit
test or whatever, I mean something completely different. If an object
is no longer on the list returned by generate_list_of_objects, that
means it has become unavailable, and running test won't accomplish
anything meaningful. That's why I'm interested in keeping the list as
up-to-date as possible.

On Apr 7, 3:45 pm, Brian Candler <b.cand...@pobox.com> wrote:
> Nathan Macinnes wrote:
> > Thanks for the clarification... My application is network based, and
> > some operations take several seconds. generate_list_of_objects takes
> > anything between 2 and 15 seconds, so I wouldn't like to have my whole
> > program on hold while that's happening. Each test process takes a few
> > seconds too, so if the object is no longer on the list, it isn't a
> > particularly bad thing if test tries to run, but it'll take up a lot
> > of time unnecessarily.
>
> Let's say generate_list_objects takes 15 seconds, and the test suite
> (iterating the objects) takes 60 seconds. Do you really want
> generate_list_objects to run 4 times uselessly while the test suite runs
> the original set of tests?
>
> Similarly, if the test suite takes 15 seconds and generate_list_objects
> takes 60 seconds, do you want to run the test suite 4 times identically
> with the first set of objects?
>
> If not, but rather you want to run the test suite exactly once for each
> set of data, then you should synchronize them. How about this
> (untested):
>
> require 'thread'
> cmd = Queue.new
> res = Queue.new
> tester = Thread.new do
>   while myHash = cmd.pop
>     myHash.each { ... }
>     res.push [myHash, :ok]
>   end
> end
>
> q.push MyClass.generate_list_of_objects
> while Time.now < time_to_finish
>   q.push MyClass.generate_list_of_objects
>   res.pop
> end
> res.pop
> q.push nil
> tester.wait
> --
> Posted viahttp://www.ruby-forum.com/.