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Timer for Windows service

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Carl Gundel-2

Timer for Windows service

What is the best way to code using a timer for:

1) a Windows service (no windows)

2) driving output to a printer (must execute in the UI process)

-Carl

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Louis LaBrunda

Re: Timer for Windows service

Hi Carl,

Maybe I'm a little slow today but I don't understand your question, can you elaborate?

Lou

On Wednesday, September 17, 2014 2:06:48 PM UTC-4, Carl Gundel wrote:

What is the best way to code using a timer for:

1) a Windows service (no windows)
2) driving output to a printer (must execute in the UI process)

-Carl

Carl Gundel-2

Re: Timer for Windows service

Hi Lou,

Well, I'm having trouble finding timer examples what don't rely on GUI related classes. The Windows service will not have a GUI, so I'm not sure how this is supposed to work.

Thanks,

-Carl

On Wednesday, September 17, 2014 2:37:52 PM UTC-4, Louis LaBrunda wrote:

Hi Carl,

Maybe I'm a little slow today but I don't understand your question, can you elaborate?

Lou

On Wednesday, September 17, 2014 2:06:48 PM UTC-4, Carl Gundel wrote:
What is the best way to code using a timer for:

1) a Windows service (no windows)
2) driving output to a printer (must execute in the UI process)

-Carl

Louis LaBrunda

Re: Timer for Windows service

Hi Carl,

I'm still not sure what you want to do or how you want to use the/a timer, so what I am about to suggest may be way off base. There is the simple Delay class. You can do something like this:

| delay |

delay := Delay forSeconds: 2.

[

delay wait.

"do something."

"some code that will answer true to keep going and false to stop."
] whileTrue.

Delay can also take #forMilliseconds:.

The above can be in a separate fork of any priority. Does this help?

Lou

On Wednesday, September 17, 2014 3:21:36 PM UTC-4, Carl Gundel wrote:

Hi Lou,

Well, I'm having trouble finding timer examples what don't rely on GUI related classes. The Windows service will not have a GUI, so I'm not sure how this is supposed to work.

Thanks,

-Carl

On Wednesday, September 17, 2014 2:37:52 PM UTC-4, Louis LaBrunda wrote:
Hi Carl,

Maybe I'm a little slow today but I don't understand your question, can you elaborate?

Lou

On Wednesday, September 17, 2014 2:06:48 PM UTC-4, Carl Gundel wrote:
What is the best way to code using a timer for:

1) a Windows service (no windows)
2) driving output to a printer (must execute in the UI process)

-Carl

Carl Gundel-2

Re: Timer for Windows service

Thanks. Yes, I've been considering using the Delay class but I would prefer a timer.

-Carl

On Wednesday, September 17, 2014 4:44:34 PM UTC-4, Louis LaBrunda wrote:

Hi Carl,

I'm still not sure what you want to do or how you want to use the/a timer, so what I am about to suggest may be way off base. There is the simple Delay class. You can do something like this:

| delay |

delay := Delay forSeconds: 2.
[
delay wait.
"do something."
"some code that will answer true to keep going and false to stop."
] whileTrue.

Delay can also take #forMilliseconds:.

The above can be in a separate fork of any priority. Does this help?

Lou

On Wednesday, September 17, 2014 3:21:36 PM UTC-4, Carl Gundel wrote:
Hi Lou,

Well, I'm having trouble finding timer examples what don't rely on GUI related classes. The Windows service will not have a GUI, so I'm not sure how this is supposed to work.

Thanks,

-Carl

On Wednesday, September 17, 2014 2:37:52 PM UTC-4, Louis LaBrunda wrote:
Hi Carl,

Maybe I'm a little slow today but I don't understand your question, can you elaborate?

Lou

On Wednesday, September 17, 2014 2:06:48 PM UTC-4, Carl Gundel wrote:
What is the best way to code using a timer for:

1) a Windows service (no windows)
2) driving output to a printer (must execute in the UI process)

-Carl

Richard Sargent

Re: Timer for Windows service

Administrator

On Wednesday, September 17, 2014 1:51:59 PM UTC-7, Carl Gundel wrote:

Thanks. Yes, I've been considering using the Delay class but I would prefer a timer.

Time millisecondsToRun: [...] is a timer. But I doubt you want to time something.
Why don't you elaborate on how you want to use this "whatever you are after"?

Carl Gundel-2

Re: Timer for Windows service

Richard,

I need to periodically examine a list of objects to perform work on. I don't need to measure time to execute anything.

So, I need a timer tick, and it should not rely on GUI code.

Thanks,

-Carl

On Wednesday, September 17, 2014 5:03:32 PM UTC-4, Richard Sargent wrote:

On Wednesday, September 17, 2014 1:51:59 PM UTC-7, Carl Gundel wrote:
Thanks. Yes, I've been considering using the Delay class but I would prefer a timer.

Time millisecondsToRun: [...] is a timer. But I doubt you want to time something.
Why don't you elaborate on how you want to use this "whatever you are after"?

Marten Feldtmann-2

Re: Timer for Windows service

Ok, then nothing seems to be time critical and then I think that using Delay within a background process seems to be a good start ...

Am Mittwoch, 17. September 2014 23:23:21 UTC+2 schrieb Carl Gundel:

Richard,

I need to periodically examine a list of objects to perform work on. I don't need to measure time to execute anything.

So, I need a timer tick, and it should not rely on GUI code.

Thanks,

-Carl

On Wednesday, September 17, 2014 5:03:32 PM UTC-4, Richard Sargent wrote:
On Wednesday, September 17, 2014 1:51:59 PM UTC-7, Carl Gundel wrote:
Thanks. Yes, I've been considering using the Delay class but I would prefer a timer.

Time millisecondsToRun: [...] is a timer. But I doubt you want to time something.
Why don't you elaborate on how you want to use this "whatever you are after"?

Richard Sargent

Re: Timer for Windows service

Administrator

In reply to this post by Carl Gundel-2

On Wednesday, September 17, 2014 2:23:21 PM UTC-7, Carl Gundel wrote:

I need to periodically examine a list of objects to perform work on. I don't need to measure time to execute anything.
So, I need a timer tick, and it should not rely on GUI code.

As Marten says, a Delay in a forked (background) process is the idiom. You may also want to evaluate AbtWorkQueue in the context of "a list of objects to perform work on".

Louis LaBrunda

Re: Timer for Windows service

In reply to this post by Carl Gundel-2

Hey Carl,

It seems the other guys have also gotten you on to using a delay. If I remember correctly (it has been a long time) I seem to remember a timer part example but if you look under the covers I think it was built on top of a delay. So making your own loop with a delay in it should do the trick.

Lou

On Wednesday, September 17, 2014 5:23:21 PM UTC-4, Carl Gundel wrote:

Richard,

I need to periodically examine a list of objects to perform work on. I don't need to measure time to execute anything.

So, I need a timer tick, and it should not rely on GUI code.

Thanks,

-Carl

On Wednesday, September 17, 2014 5:03:32 PM UTC-4, Richard Sargent wrote:
On Wednesday, September 17, 2014 1:51:59 PM UTC-7, Carl Gundel wrote:
Thanks. Yes, I've been considering using the Delay class but I would prefer a timer.

Time millisecondsToRun: [...] is a timer. But I doubt you want to time something.
Why don't you elaborate on how you want to use this "whatever you are after"?