[development] estimating execution time left and hook_cron

[nitin gupta]

Ohh, thats great, thanks pals, I think my problem will be solved by this.
but if someone still has something better in their heads, please let it out.
--
Regards,
Nitin Kumar Gupta
http://publicmind.in/blog/


On Sat, Sep 19, 2009 at 2:00 AM, Khalid Baheyeldin <kb at 2bits.com> wrote:

> On Fri, Sep 18, 2009 at 4:03 PM, nitin gupta <nitingupta.iitg at gmail.com>wrote:
>
>> hey, thanks for pointing this out but as I see the job queue module uses a
>> timer_read('page') to see the current execution time. Who starts this timer?
>> Is it set by the PHP when the execution starts? becuase if it so, then the
>> work is done.
>
>
> Core Drupal starts this timer for you in bootstrap.inc.
>
>
>>
>> One more thing I would like to ask from the experienced ones, I have been
>> working with PHP for just a while now (say 10 months), but what I am really
>> confused about is how do we get to know so many things that are of our
>> interest? I mean sometimes I just end up reinventing the wheel.
>>
>> --
>> Regards,
>> Nitin Kumar Gupta
>> http://publicmind.in/blog/
>>
>>
>> On Sat, Sep 19, 2009 at 1:15 AM, Michael Prasuhn <mike at mikeyp.net> wrote:
>>
>>> You may want to check out the Job Queue module, as it provides the
>>> functionality you are looking for. You could either add a dependency on it
>>> (recommended) or at least read through the code to see how it works, to
>>> prevent timeouts (It has a feature to check execution time and stop
>>> processing if the time reached is half of the max execution time).
>>>
>>> http://drupal.org/project/job_queue
>>>
>>> -Mike
>>> __________________
>>> Michael Prasuhn
>>> 503.512.0822 office
>>> mike at mikeyp.net
>>> http://mikeyp.net
>>>
>>>
>>> On Sep 18, 2009, at 10:16 AM, nitin gupta wrote:
>>>
>>>  Hello,
>>>>
>>>> I am maintaining the module feedapi imagegrabber, which pulls the images
>>>> from the original url of the feed items (just like google reader). It is
>>>> implemented on the top of feedapi and hence implements the
>>>> feedapi_after_refresh() hook, which is basically fired by the feedapi after
>>>> it has refreshed the feed.
>>>>
>>>> Now, as my module download images from an external website, I can never
>>>> be sure about the time it will take to complete the job of downloading
>>>> images for all the feed items. Therefore, sometimes I get a 'fatal execution
>>>> time exceeded error'. How can I know how much execution time is left, so
>>>> that I can return on time by saving the rest of the work as a cron job?
>>>>
>>>> I have gone through the source code of FeedAPI which implements
>>>> hook_cron(). It uses a variable called 'cron_semaphore', which I am guessing
>>>> is some way to share execution time but am unable to get how. I will really
>>>> appreciate if someone can explain the above to me or provide some tutorial
>>>> links on writing a good hook_cron implementation.
>>>>
>>>> --
>>>> Regards,
>>>> Nitin Kumar Gupta
>>>> http://publicmind.in/blog/
>>>>
>>>
>>>
>>
>
>
> --
> Khalid M. Baheyeldin
> 2bits.com, Inc.
> http://2bits.com
> Drupal optimization, development, customization and consulting.
> Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
> Simplicity is the ultimate sophistication. --   Leonardo da Vinci
>
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