>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:
# MyObjectStore.py
from MiddleKit.Run.MySQLObjectStore import MySQLObjectStore
store = 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 = self.Store()
# do something with currentStore
Is the above code thread-save.
Joern.
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