Webware for Python

At 08:24 AM 5/28/2001 +0200, J=F6rn Schrader wrote:
>Is the above code thread-save.
>
>Joern.

I happen to know that Geoff does mix both techniques in the same manner=20
than you have described. So do I.

I think his earlier message was just emphasizing that the initialization=20
code should go in the module.

Feel free to load up SitePage with as many conveniences as appropriate for=
=20
your site.


-Chuck

At 08:24 AM 5/28/2001 +0200, J=F6rn Schrader wrote:
> >This isn't thread-safe -- 2 servlets could create the store at the same
>time.
> >
> >You're better off putting the store initialization into a module that=
 gets
> >imported -- then Python automatically ensures that only one thread=
 imports
> >it at once.  (Either that or you should explicitly use a threading.Lock
> >object to make it thread-safe.)
> >
> >If you want to "pre-load" the store when the app server starts up to=
 reduce
>
> >response time, then you can put the import into the __init__.py in your
> >context directory.  __init__.py automatically gets imported when the app
> >server starts.
>
>Thanks Geoff for your hint concerning thread-safety. But Ian's way to have=
 a
>Base
>Servlet that cares for store opening is attractive too. Do you think, that
>one can
>mix both methods by having a store initialization module that gets imported
>in
>a base servlet:


Yes, this combined solution is thread-safe, and IMHO it's the best way to=20
do this, because if you ever needed to change MyPage.Store() to do=20
something else you'd be able to do so.

- Geoff

># MyObjectStore.py
>from MiddleKit.Run.MySQLObjectStore import MySQLObjectStore
>store =3D MySQLObjectStore()
>store.readModelFileNamed('MyMiddleKitModel')
>
>
># MyPage.py
>from MyObjectStore import store
>from WebKit.Page import Page
>class MyPage(Page):
>      def Store(self):
>          return store
>
># MyDerivedPage.py
>from MyPage import MyPage
>class MyDerivedPage(MyPage):
>         def writeContent(self):
>                 currentStore =3D self.Store()
>                 # do something with currentStore
>
>Is the above code thread-save.
>
>
>Joern.
>
>
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