[Seaside] REST and Seaside

[David T. Lewis]

Here is the same thing packaged up in a change set. I'll include it
with OSProcess next time I release something.

To save an image in background, evaluate "UnixProcess saveImageInBackground".

Dave

On Sat, Apr 09, 2005 at 12:27:39PM -0400, David T. Lewis wrote:
> Hi Nevin,
> 
> I would guess that those large image saves could make your server
> appear to lock up for a half minute. If that is the case, and if you
> have lots of physical memory on your server, you can probably hide
> this from your users by doing something like this for the image saves:
> 
>    UnixProcess forkHeadlessSqueakAndDo: [
>       | newName timeStamp st |
>       timeStamp := (TimeStamp current printString first: 19) copyReplaceAll: ':' with: '-'.
>       newName _ 'squeak-', timeStamp.
>       st := SmalltalkImage current.
>       (Delay forMilliseconds: 200) wait.
>       (SourceFiles at: 2) ifNotNil:
>          [st closeSourceFiles; "so copying the changes file will always work"
>             saveChangesInFileNamed: (st fullNameForChangesNamed: newName)].
>       st saveImageInFileNamed: (st fullNameForImageNamed: newName).
>       st snapshot: false andQuit: true]
> 
> Your main Squeak server image will keep running without interruption while
> another headless Squeak saves the image. Even though it runs another Squeak
> image, it won't use much real memory (the two Squeaks share most of the same
> memory space due to Unix memory management).
> 
> OSProcess is on SqueakMap. I'm assuming you are using a Unix/Linux server,
> hopefully my recollection is correct.
> 
> Test this carefully, I just hacked it together in response to your post, and
> it's not something I have a need to use myself. But it should help get rid
> of the big delays your users are seeing.
> 
> HTH,
> Dave
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