Oh yes, and one more thing: You need to set up your system
properties in the following way:
er.extensions.ERXApplication.useEditingContextUnlocker=true
er.extensions.ERXEC.defaultAutomaticLockUnlock=true
er.extensions.ERXEC.useSharedEditingContext=false
er.extensions.ERXEC.defaultCoalesceAutoLocks=true
The last one is optional, I think, but I don't have a good enough
grasp of what that last one is about to be able to explain it here.
I saw it recommended in a posting once, and using it has done me no
harm.
I think that's it. List, is there anything else I'm missing?
Mark
On May 31, 2007, at 10:04 AM, Mike Schrag wrote:
The only place where there are MAYBE some pitfalls (and this is
just theoretical because I haven't done much testing of this case)
is passing EO's between threads. I instead pass GID's, or use
ERXEOControlUtilities.convertGIDtoEO/convertEOtoGID if I have
dictionaries or arrays of them.
ms
On May 31, 2007, at 10:00 AM, Steven Mark McCraw wrote:
Hey Ted,
That's how I've been doing it for a bit now, and so far, so good!
It certainly doesn't HURT to lock and unlock editing contexts
created through ERXEC, but the authors of that whole business have
done a great job in making it just as easy to use (locking-wise)
as the default editing context, so there doesn't appear to be a
need to. If you're already tightly integrated with Project
Wonder, it shouldn't be too hard to make the changeover (just kind
of tedious as you go through and find all the places that you need
to retrieve local instances for relationships). Good luck!
Mark
On May 31, 2007, at 3:15 AM, Ted Archibald wrote:
So, if I use ERXEC is there anything else I have to concern
myself about? Is all the locking taken care of that I need to
worry about?
IOW, I can just go into my code and any instances I have of a
defaultEC for creating and inserting objects I can simply use
ERXEC keeping in mind that I need to retrieve local instances of
other objects if need be.
On 5/30/07, Steven Mark McCraw <[EMAIL PROTECTED]> wrote:
Hi Ted,
...
So, at the page
level, I create a peer ec:
EOEditingContext _peerEC = ERXEC.newEditingContext();
and then use it to create the new objects:
MyEO eo = (MyEO)EOUtilities.createAndInsertInstance(_peerEC,
"MyEO");
There are plenty of gotchas to be aware of here, mainly that if you
are relating your newly created objects to objects that are
contained
in another editing context, you have to first bring those other
options into the peer:
OtherEO oeo = (OtherEO)EOUtilities.localInstanceOfObject(_peerEC,
oeo);
(or use EOUtilities.localInstancesOfObjects(EOEditingContext,
NSArray
to do a whole set at once).
Hope this helps. Getting past these issues was a bitter struggle
for
me, and I wasn't even aware of all of the various problems (like
having to have an EO in and editing context before doing ANYTHING to
it) for several years. Trust me, better to start off following the
rules people have figured out from experience than to have to go
back
later and refactor tons of code to fit those rules.
Mark
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