[Newbies] #Schedule - How to Use?

[David Shaffer]

I’ve been away from Squeak for a long time but I don’t think Schedule does what you want.  I browsed the code a bit and it seems to be more about /storing/ a schedule rather than /executing/ one.

John Pierce wrote a package called Scheduler which I used with great success many (many) years ago.  The SqueakMap entry still exists but the file links are dead.  I have attached my latest version of that package.  I tried it out in Squeak 5.2 and it seemed to work but I can’t make any promises.  I don’t think it will have the same problems as a long Delay since its main loop seems to check for runnable tasks every 1/4 second.

The SqueakMap page has some docs: http://map.squeak.org/package/cb344d5b-c810-45cd-a440-534d900aacfd <http://map.squeak.org/package/cb344d5b-c810-45cd-a440-534d900aacfd>

BTW, to load the MCZ you can use the File List (under Tools).

Best,

David


> On Jun 24, 2019, at 5:16 PM, John-Reed Maffeo <jrmaffeo at gmail.com> wrote:
> 
> I am working on an application which requires task scheduler like cron on UNIX or Task Manager on Windows. In the swiki , there is a page about Refactored Date and Time Classes <http://wiki.squeak.org/squeak/1871> which mentions #Schedule in the context of TV programs. I have figured out how to set up, but I can not figure out how to use it productively.
> 
> My simple use case is: 
> a. create an instance of #Schedule 
> b. Use the schedule to write a string to the Transcript based on the contents of the schedule.
> 
> 
> |sampleSchedule  rightNow cr |
> 
> rightNow := DateAndTime now.
> cr := String cr.
> 
> sampleSchedule := Schedule starting: rightNow  ending: rightNow + 20 minutes .
> 
> sampleSchedule schedule: {Duration minutes: 1. Duration minutes: 3}.
> sampleSchedule  scheduleDo:[:each |Transcript show: each asString, String cr].
> >> This results in all of the schedule items being written to the Transcript immediately, rather at the schedule time for each.
> 
> How to I use a schedule to run a block at the time specified by the schedule. 
> 
> I have looked at #Delay, but it has a limit of ~six days which will not work for me.
> 
> Thanks,
> 
> -jrm
> 
> 
> 
> 
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