chiphpug-discuss

[chiPHPug-discuss] Run a script 5 min later

[Terry <ma...@ao...>]

How can I run a script 5 min after a user does something?

I want to give a user 5 minutes to cancel an action, and if they don't 
then it actually happens. So, I'd like to run a script 5 minutes later, 
and have it perform any actions in the queue that are 5+ minutes old. 5 
min is not critical, but I don't think I should wait longer than 10 
min.

What if it's only needed very infrequently?

I'm thinking the options are to use a cron job that runs every few 
minutes, or, call the script with curl and have it sleep for 5 minutes 
first.

Terry

Re: [chiPHPug-discuss] Run a script 5 min later

[Hank M. <hma...@gm...>]

cron job.   put a time stamp in the database, cron job checks the timestamp
and executes all records > 5 minutes ... if you execute the cronjob every 5
minutes then the longest one would sit is 9:59 ... shorten the interval,
shorten the length ...

Could do the same thing with timestamps on files if you don't want to do the
database thing.


On 11/13/06, Terry <ma...@ao...> wrote:
>
>
> How can I run a script 5 min after a user does something?
>
> I want to give a user 5 minutes to cancel an action, and if they don't
> then it actually happens. So, I'd like to run a script 5 minutes later,
> and have it perform any actions in the queue that are 5+ minutes old. 5
> min is not critical, but I don't think I should wait longer than 10
> min.
>
> What if it's only needed very infrequently?
>
> I'm thinking the options are to use a cron job that runs every few
> minutes, or, call the script with curl and have it sleep for 5 minutes
> first.
>
> Terry
>
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> chiPHPug-discuss mailing list
> chi...@li...
> https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
>

Re: [chiPHPug-discuss] Run a script 5 min later

[Hank M. <hma...@gm...>]

Ohhh, one gotcha.   Never set your interval shorter than the time the job
takes to run ... bad things happen :)

On 11/13/06, Hank Marquardt <hma...@gm...> wrote:
>
> cron job.   put a time stamp in the database, cron job checks the
> timestamp and executes all records > 5 minutes ... if you execute the
> cronjob every 5 minutes then the longest one would sit is 9:59 ... shorten
> the interval, shorten the length ...
>
> Could do the same thing with timestamps on files if you don't want to do
> the database thing.
>
>
> On 11/13/06, Terry < ma...@ao...> wrote:
> >
> >
> > How can I run a script 5 min after a user does something?
> >
> > I want to give a user 5 minutes to cancel an action, and if they don't
> > then it actually happens. So, I'd like to run a script 5 minutes later,
> > and have it perform any actions in the queue that are 5+ minutes old. 5
> > min is not critical, but I don't think I should wait longer than 10
> > min.
> >
> > What if it's only needed very infrequently?
> >
> > I'm thinking the options are to use a cron job that runs every few
> > minutes, or, call the script with curl and have it sleep for 5 minutes
> > first.
> >
> > Terry
> >
> >
> >
> > -------------------------------------------------------------------------
> > Using Tomcat but need to do more? Need to support web services,
> > security?
> > Get stuff done quickly with pre-integrated technology to make your job
> > easier
> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> > Geronimo
> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> >
> > _______________________________________________
> > chiPHPug-discuss mailing list
> > chi...@li...
> > https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
> >
>
>

Re: [chiPHPug-discuss] Run a script 5 min later

[Jason R. <ja...@ho...>]

A job queue in the DB and a cron job that reads the DB and executes it
is the best way probably.

If you did not have access to cron on your system, another way would be
to use fork/exec and have the child job sleep for 5 minutes and then
check the state of a flat file or DB for cancellation.


Hank Marquardt wrote:
> Ohhh, one gotcha.   Never set your interval shorter than the time the
> job takes to run ... bad things happen :)
> 
> On 11/13/06, *Hank Marquardt* < hma...@gm...
> <mailto:hma...@gm...>> wrote:
> 
>     cron job.   put a time stamp in the database, cron job checks the
>     timestamp and executes all records > 5 minutes ... if you execute
>     the cronjob every 5 minutes then the longest one would sit is 9:59
>     ... shorten the interval, shorten the length ...
> 
>     Could do the same thing with timestamps on files if you don't want
>     to do the database thing.
> 
> 
> 
>     On 11/13/06, * Terry* < ma...@ao... <mailto:ma...@ao...>> wrote:
> 
> 
>         How can I run a script 5 min after a user does something?
> 
>         I want to give a user 5 minutes to cancel an action, and if they
>         don't
>         then it actually happens. So, I'd like to run a script 5 minutes
>         later,
>         and have it perform any actions in the queue that are 5+ minutes
>         old. 5
>         min is not critical, but I don't think I should wait longer than 10
>         min.
> 
>         What if it's only needed very infrequently?
> 
>         I'm thinking the options are to use a cron job that runs every few
>         minutes, or, call the script with curl and have it sleep for 5
>         minutes
>         first.
> 
>         Terry
> 
> 
>         -------------------------------------------------------------------------
>         Using Tomcat but need to do more? Need to support web services,
>         security?
>         Get stuff done quickly with pre-integrated technology to make
>         your job easier
>         Download IBM WebSphere Application Server v.1.0.1 based on
>         Apache Geronimo
>         http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>         <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642>
>         _______________________________________________
>         chiPHPug-discuss mailing list
>         chi...@li...
>         <mailto:chi...@li...>
>         https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> chiPHPug-discuss mailing list
> chi...@li...
> https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss

Re: [chiPHPug-discuss] Run a script 5 min later

[Richard L. <ce...@l-...>]

fork/exec/sleep is rife with shoals for the newbie, so test thoroughly
if you go that route.

As far as the program execution time exceeding the interval of a cron
job goes, one easy thing to do is to have a mkdir() [which is
guaranteed atomic] something like this:

<?php
  $lock_file = "/var/run/thisscriptname.lock";
  $lock_stale = 60 * 5; // 5 minutes, for example
  if (file_exists($lock_file)){
    if (filemtime($lock_file) < time() - $lock_stale)){
      error_log("Removing stale lock: $lock_file");
      unlink($lock_file);
    }
    else{
      error_log("Aborting run due to lock: $lock_file");
      exit;
    }
  }
  mkdir($lock_file);
  while ( ... ){
    //process your records or whatever, and do this a LOT:
    touch($lock_file);
  }
?>

Damn!  touch() on a dir in Windows is broken?!  Sheesh.  You're on
your own for Windows, kid...   Sorry.
http://php.net/touch

On Tue, November 14, 2006 8:08 am, Jason Rexilius wrote:
> A job queue in the DB and a cron job that reads the DB and executes it
> is the best way probably.
>
> If you did not have access to cron on your system, another way would
> be
> to use fork/exec and have the child job sleep for 5 minutes and then
> check the state of a flat file or DB for cancellation.
>
>
> Hank Marquardt wrote:
>> Ohhh, one gotcha.   Never set your interval shorter than the time
>> the
>> job takes to run ... bad things happen :)
>>
>> On 11/13/06, *Hank Marquardt* < hma...@gm...
>> <mailto:hma...@gm...>> wrote:
>>
>>     cron job.   put a time stamp in the database, cron job checks
>> the
>>     timestamp and executes all records > 5 minutes ... if you
>> execute
>>     the cronjob every 5 minutes then the longest one would sit is
>> 9:59
>>     ... shorten the interval, shorten the length ...
>>
>>     Could do the same thing with timestamps on files if you don't
>> want
>>     to do the database thing.
>>
>>
>>
>>     On 11/13/06, * Terry* < ma...@ao...
>> <mailto:ma...@ao...>> wrote:
>>
>>
>>         How can I run a script 5 min after a user does something?
>>
>>         I want to give a user 5 minutes to cancel an action, and if
>> they
>>         don't
>>         then it actually happens. So, I'd like to run a script 5
>> minutes
>>         later,
>>         and have it perform any actions in the queue that are 5+
>> minutes
>>         old. 5
>>         min is not critical, but I don't think I should wait longer
>> than 10
>>         min.
>>
>>         What if it's only needed very infrequently?
>>
>>         I'm thinking the options are to use a cron job that runs
>> every few
>>         minutes, or, call the script with curl and have it sleep for
>> 5
>>         minutes
>>         first.
>>
>>         Terry
>>
>>
>>         -------------------------------------------------------------------------
>>         Using Tomcat but need to do more? Need to support web
>> services,
>>         security?
>>         Get stuff done quickly with pre-integrated technology to
>> make
>>         your job easier
>>         Download IBM WebSphere Application Server v.1.0.1 based on
>>         Apache Geronimo
>>         http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>         <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642>
>>         _______________________________________________
>>         chiPHPug-discuss mailing list
>>         chi...@li...
>>         <mailto:chi...@li...>
>>         https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>> -------------------------------------------------------------------------
>> Using Tomcat but need to do more? Need to support web services,
>> security?
>> Get stuff done quickly with pre-integrated technology to make your
>> job easier
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache
>> Geronimo
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> chiPHPug-discuss mailing list
>> chi...@li...
>> https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services,
> security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> chiPHPug-discuss mailing list
> chi...@li...
> https://lists.sourceforge.net/lists/listinfo/chiphpug-discuss
>


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