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Image-specific "cache"

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Uko2

Image-specific "cache"

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, it want to regenerate that data, so the will be no who images with the same persisted data. Is there some way to act on image launch? Or maybe you have more suggestions…

Cheers,
Uko

Uko2

Re: Image-specific "cache"

Sorry, my last email is UNREADABLE!

Here is the spellchecked version:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, I want to regenerate that data, so there will be no two images with the same persisted data. Is there some way to act on an image launch? Or maybe you have better suggestions…

Cheers,
Uko

On 03 Sep 2015, at 12:25, Yuriy Tymchuk <[hidden email]> wrote:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, it want to regenerate that data, so the will be no who images with the same persisted data. Is there some way to act on image launch? Or maybe you have more suggestions…

Cheers,
Uko

ccrraaiigg

Re: Image-specific "cache"

Hoi Uko--

> I want to persist some value (in a singleton), but when a user
> creates a copy of the image, I want to regenerate that data, so there
> will be no two images with the same persisted data. Is there some way
> to act on an image launch?

Sure, you can tie into the StartUpList and ShutDownList in
SmalltalkImage. This is how the delay scheduler is restarted on system
startup, for example.

> Or maybe you have better suggestions...

This seems like the conventional way of doing things like that, as
long the system doesn't need the assistance of another running system to
compute the data.

cheers,

-C

--
Craig Latta
netjam.org
+31 6 2757 7177 (SMS ok)
+ 1 415 287 3547 (no SMS)

Stephan Eggermont-3

Re: Image-specific "cache"

In reply to this post by Uko2

On 03-09-15 12:33, Yuriy Tymchuk wrote:
> I want to persist some value (in a singleton), but when a user creates a copy of the image, I want to regenerate that data, so there will be no two images with the same persisted data. Is there some way to act on an image launch? Or maybe you have better suggestions…

You could use

SHA1 hashMessage: FileSystem workingDirectory fullName

to see if you are in the same image, and you could
add a class to the startuplist like GTPlayBook does

Stephan

Max Leske

Re: Image-specific "cache"

In reply to this post by Uko2

You could also use the session checking logic NativeBoost uses. Take a look at NativeBoost>>sessionChanged et al.

Cheers,

Max

On 03 Sep 2015, at 12:33, Yuriy Tymchuk <[hidden email]> wrote:

Sorry, my last email is UNREADABLE!

Here is the spellchecked version:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, I want to regenerate that data, so there will be no two images with the same persisted data. Is there some way to act on an image launch? Or maybe you have better suggestions…

Cheers,
Uko

On 03 Sep 2015, at 12:25, Yuriy Tymchuk <[hidden email]> wrote:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, it want to regenerate that data, so the will be no who images with the same persisted data. Is there some way to act on image launch? Or maybe you have more suggestions…

Cheers,
Uko

tinchodias

Re: Image-specific "cache"

There is also SnapshotDone, announced in SystemAnnouncer.

Martin

On Thu, Sep 3, 2015 at 1:32 PM, Max Leske <[hidden email]> wrote:

You could also use the session checking logic NativeBoost uses. Take a look at NativeBoost>>sessionChanged et al.

Cheers,
Max

On 03 Sep 2015, at 12:33, Yuriy Tymchuk <[hidden email]> wrote:

Sorry, my last email is UNREADABLE!

Here is the spellchecked version:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, I want to regenerate that data, so there will be no two images with the same persisted data. Is there some way to act on an image launch? Or maybe you have better suggestions…

Cheers,
Uko

On 03 Sep 2015, at 12:25, Yuriy Tymchuk <[hidden email]> wrote:

Hi,

I want to persist some value (in a singleton), but when a user creates a copy of the image, it want to regenerate that data, so the will be no who images with the same persisted data. Is there some way to act on image launch? Or maybe you have more suggestions…

Cheers,
Uko