[Vm-dev] [Pharo-users] Running headless on Windows

[Nicolai Hess]

2017-12-29 16:53 GMT+01:00 Denis Kudriashov <dionisiydk at gmail.com>:

> 2017-12-29 16:13 GMT+01:00 Andrei Stebakov <lispercat at gmail.com>:
>
>> Nicolai, the maximize/non-maximize trick worked! Thanks! I wonder if it's
>> an easy fix to put in Pharo.
>>
>
> So it means that something in image is not initialised. It can be another
> bug of wrong startup order
>


Maybe a problem on the image and the vm side.

Even in headless mode, starting pharo creates a window. Even if it is
hidden, it has some size.

Quit and Saving an image will write the current width/height into the image
file.

Starting the vm will create a window and set the size of the window to the
last size.
The window is always created in normal (not-maximized) mode and the
available size is a little bit smaller
than for a maximized window.

Now, the image checks for a change of the size of the current DisplayScreen
instance and the actual screen size.
If this is different (as in this case) a new DisplayScreen is initialized
which will call a full screen update (ioForceDisplayUpdate).

And this method will show a hidden (headless) image.






>
>
>>
>> On Fri, Dec 29, 2017 at 6:22 AM, phil at highoctane.be <phil at highoctane.be>
>> wrote:
>>
>>> I am using nssm because the service option is broken.
>>>
>>> The code seems to still be in the image but disabled (there are quite a
>>> few things like that actually).
>>>
>>> Phil
>>>
>>>
>>> On Fri, Dec 29, 2017 at 11:59 AM, Torsten Bergmann <astares at gmx.de>
>>> wrote:
>>>
>>>>
>>>> Hi, (cross posting vm-dev)
>>>>
>>>> nssm is nice - but requires additional tools.
>>>>
>>>> Since the days of Squeak the windows VM had the
>>>>
>>>>  -service "ServiceName"
>>>>
>>>> option and one was able to run Squeak as a windows service out of the
>>>> box.
>>>>
>>>> See http://wiki.squeak.org/squeak/105 for details.
>>>>
>>>> This option allows to register/deregister with the windows service
>>>> manager and run
>>>> a headless image.
>>>>
>>>> I run a Squeak Wiki (Swiki/Comanche) since years with this and it is
>>>> very nice and stable.
>>>>
>>>> Unfortunately this is broken in recent Pharo VMs and so far Esteban or
>>>> others did not
>>>> have the time to look into this issue. Would be really nice if this
>>>> option could
>>>> be recovered in 2018. So one could easily deploy and run Seaside or
>>>> Teapot/Tealight
>>>> or Zinc/WebClient based web services on Windows.
>>>>
>>>> If we want to deploy Smalltalk based web applications or services on
>>>> Windows we
>>>> should support that. It will keep Windows administrators happy and we
>>>> would integrate with
>>>> the whole ecosystem (for instance you can start/stop a service using
>>>> Windows scripting for
>>>> doing backups, etc.) right out of the box.
>>>>
>>>> Bye
>>>> T.
>>>>
>>>>
>>>>
>>>> Gesendet: Freitag, 29. Dezember 2017 um 11:36 Uhr
>>>> Von: "phil at highoctane.be" <phil at highoctane.be>
>>>> An: "Any question about pharo is welcome" <pharo-users at lists.pharo.org>
>>>> Betreff: Re: [Pharo-users] Running headless on Windows
>>>>
>>>> If you want to run Pharo as a service, I have found nssm to be working
>>>> well.
>>>>  https://nssm.cc
>>>>
>>>> Phil
>>>>
>>>> On Dec 29, 2017 09:25, "Nicolai Hess" <nicolaihess at gmail.com[mailto:
>>>> nicolaihess at gmail.com]> wrote:
>>>>
>>>>
>>>> 2017-12-29 3:07 GMT+01:00 Andrei Stebakov <lispercat at gmail.com[mailto:
>>>> lispercat at gmail.com]>:
>>>> Pierce, I tried all of those "no display" options, the result is the
>>>> same
>>>>
>>>>
>>>> On Dec 28, 2017 8:37 PM, "Pierce Ng" <pierce at samadhiweb.com[mailto:
>>>> pierce at samadhiweb.com]> wrote:On Wed, Dec 27, 2017 at 04:58:39PM
>>>> +0100, Cyril Ferlicot D. wrote:
>>>> > On 12/27/2017 04:39 PM, Andrei Stebakov wrote:
>>>> > > When I run Pharo 6.1 with -- headless option on Windows, it
>>>> executes the
>>>> > > eval command as expected but during the execution (which lasts 4
>>>> sec) it
>>>> > > opens the Pharo GUI.
>>>> > > Is it expected? I thought headless means that the whole execution
>>>> would
>>>> > > happen in the background
>>>> >
>>>> > I think that currently Pharo does not have a "real" headless. But I
>>>> > heard there was work on that part for Pharo 7.
>>>>
>>>> I know OP is talking about Windows...  I've been running server
>>>> applications on
>>>> Linux without X11 with -vm-display-null and in-image RFBServer for
>>>> access to
>>>> Pharo over VNC. This works very well for me.
>>>>
>>>> I believe "real" headless means GUI is not run at all and therefore
>>>> does not
>>>> consume CPU cycles, which is very welcome. Meanwhile, maybe
>>>> -vm-display-null
>>>> works on Windows for scripting purposes?
>>>>
>>>> Pierce
>>>>
>>>>
>>>>
>>>> Hi Andrei,
>>>>
>>>> can you try this:
>>>>
>>>> Open Pharo normal (no headless option).
>>>> Change the window size to "not-maximized" (eve if it is actually not
>>>> maximized, maximize it ones and change it back to "not-maximized")
>>>> Save and quit the image.
>>>>
>>>> After that, a call like
>>>>
>>>> pharo --headless pharo.image eval "DateAndTime now"
>>>> will write the output to the stdout file, without opening a window.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>
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