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Resolved Use timer event without window

  1. How-to
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  1. iliyan iliev
    iliyan iliev
  2. PowerBuilder
  3. Thursday, 5 September 2019 08:04 AM UTC

It's possible to use timing object in app without window object ?!

App start schedule process and don't window and i use timer event to start process.

  1. Event
  2. Timer
web services SOAP - WS-Security / PasswordText
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Responses (4)
Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Thursday, 5 September 2019 15:11 PM UTC
  2. PowerBuilder
  3. # 1

Hi Iiyan;

  Yes & No ....

YES: The Timing object exists on its own and can interact with either visual or non-visual object classes

NO: A PB app cannot continue to run unless it has an open Window (unless its in a tight loop which in not efficient MS-Window resource wise - aka "poor design").

   So the key would be to have an open non-visible window that the timing object can interact with (or any of its controls or NVUO's that it instantiated).

HTH

Regards ... Chris

 

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iliyan iliev
  1. iliyan iliev
  2. Monday, 9 September 2019 08:22 AM UTC
It's possible convert PB app with non-vislable window do windows service with sc.exe or NSSM ?!
  1. Helpful
Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Monday, 9 September 2019 14:44 PM UTC
Hi Iliyan;

Absolutely .. I have been doing this with NSSM for over a decade! ;-)

Regards ... Chris
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Michael Kramer
Michael Kramer Accepted Answer Pending Moderation
  1. Thursday, 5 September 2019 13:13 PM UTC
  2. PowerBuilder
  3. # 2

Hi,

Your app will run if you open a window having Visible = FALSE.

You may opt to make the window visible while you debug.

There is limit on how many TIMING objects can run at the same time within a single Windows O/S process. As far as I recall it used to be 15 or 16 when I checked about 20 years ago.

If you want to run a PB app as a Windows service you should consider one of the Windows service options available in the market. I have used PBNIServ from TopWiz Programming. I know there are other tools as well.

HTH /Michael

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Miguel Leeuwe
Miguel Leeuwe Accepted Answer Pending Moderation
  1. Thursday, 5 September 2019 13:10 PM UTC
  2. PowerBuilder
  3. # 3

You could have your application with the timer running in the systemtray.

For example check these out:

http://www.topwizprogramming.com/freecode_icontray.html

There are other ways, like running your application as a service:

http://www.topwizprogramming.com/pbniserv.html

 

Maybe you can also just run your application with an invisible window, but then you'd have to find a way to end it properly.

HIH

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René Ullrich
René Ullrich Accepted Answer Pending Moderation
  1. Thursday, 5 September 2019 12:00 PM UTC
  2. PowerBuilder
  3. # 4

Hi Iliyan,

I'm not sure what you want to do.

The timing object should run without a window.

But your application will not run without a window. If there is no open window after your applications open event finished your application will be automatically closed.

HTH,

René

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Roland Smith
  1. Roland Smith
  2. Thursday, 5 September 2019 13:28 PM UTC
A PowerBuilder program does not require a window. At a previous employer I wrote several windowless apps that ran on schedule once per night.

The main one created text files which were manually imported into our accounting software the next day.
  1. Helpful
mike S
  1. mike S
  2. Thursday, 5 September 2019 13:30 PM UTC
to work without a window, the application open event would need to have a loop to keep it from closing.

i would also use sleep instead of timer since you want to release cpu cycles back to the OS.



do while true

sleep(60) //wake up every 60 seconds

of_runprocess()

loop



a window might be better since sleep would prevent your app from getting notifications to end until it wakes up



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