Re: Should ERXEC get sharedEC automagically?
Re: Should ERXEC get sharedEC automagically?
- Subject: Re: Should ERXEC get sharedEC automagically?
- From: "ocs@ocs" <email@hidden>
- Date: Tue, 21 Aug 2018 22:02:36 +0200
Indeed! If I switch off the OSCPool, it starts to work properly.
Thanks just again!
Nevertheless, I still must be missing something of grave importance, for with
OCSPool (I use ), I would presume the SEC for the pool being currently used by
the ERXEC would load the shared objects?
It does not: the global one does automatically load the shared objects, but the
SEC-based one of ERXEC remains empty.
Note: the code in question does not run in a session context; it is performed
at launch, before the first session is created. Might that be important perhaps?
All the best,
OC
> On 21 Aug 2018, at 9:42 PM, Chuck Hill <email@hidden> wrote:
>
> Are you using the ERXObjectStoreCoordinatorPool? It keeps one SEC per pool,
> not one shared globally.
> EOSharedEditingContext.defaultSharedEditingContext() is the global one.
>
> Chuck
>
> From: "ocs@ocs" <email@hidden <mailto:email@hidden>>
> Date: Tuesday, August 21, 2018 at 12:23 PM
> To: Chuck Hill <email@hidden <mailto:email@hidden>>
> Cc: "email@hidden <mailto:email@hidden>"
> <email@hidden <mailto:email@hidden>>
> Subject: Re: Should ERXEC get sharedEC automagically?
>
> P.S. It seems ERX completely ignores the default shared EC, using its own
> one. If I try e.g., this:
>
> ===
> println "The default sharedEC is
> ${EOSharedEditingContext.defaultSharedEditingContext()}"
> 6.times {
> def e=ERXEC.newEditingContext()
> println "EC $e gets sec $e.sharedEditingContext"
> }
> println "The default sharedEC still is
> ${EOSharedEditingContext.defaultSharedEditingContext()}"
> ===
>
> it looks like this:
>
> ===
> The default sharedEC is
> com.webobjects.eocontrol.EOSharedEditingContext@26bbe604
> 2005 [main] INFO er.extensions.eof.ERXObjectStoreCoordinatorPool -
> initializing Pool...
> 2008 [main] INFO er.extensions.eof.ERXObjectStoreCoordinatorPool -
> initializing Pool finished
> EC er.extensions.eof.ERXEC@40e32762 gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> EC er.extensions.eof.ERXEC@7d78f3d5 gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> EC er.extensions.eof.ERXEC@f5b6e78 gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> EC er.extensions.eof.ERXEC@71926a36 gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> EC er.extensions.eof.ERXEC@48976e6d gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> EC er.extensions.eof.ERXEC@7f6874f2 gets sec
> com.webobjects.eocontrol.EOSharedEditingContext@5875de6a
> The default sharedEC still is
> com.webobjects.eocontrol.EOSharedEditingContext@26bbe604
> ===
>
> Thanks and all the best,
> OC
>
>
> On 21 Aug 2018, at 9:07 PM, ocs@ocs <email@hidden <mailto:email@hidden>> wrote:
>
> Chuck,
>
> sorry, I did not describe the problem clearly enough...
>
>
> On 21 Aug 2018, at 8:39 PM, Chuck Hill <email@hidden
> <mailto:email@hidden>> wrote:
> Once an EC has objects in it, its shared EC won’t get changed if a new
> default is set. The notification is ignored.
>
> Quite, but that's not the problem.
>
> With EOEditingContext, it works like this:
>
> (i) ec created, has no sharedEC (ec.sharedEditingContext==null)
> (ii) (due to something which creates a DBContext, I believe) the default
> sharedEC is initialized; it loads the shared objects, and sends the
> notification
> (iii) ec observes the notification, and sets the default sharedEC as its own
> sharedEC (for it is still empty)
> (iv) now, ec fetches the objects — automatically giving shared ones from its
> sharedEC, which does contain them
>
> With ERXEC (and ERXEC.useSharedEditingContext=true), there's an important
> difference:
>
> (i) erxec created, immediately gets a sharedEC
> (ec.sharedEditingContext!=null). This sharedEC differs from the default
> shared EC
> (ii) (due to something which creates a DBContext, I believe) the default
> sharedEC is initialized; it loads the shared objects, and sends the
> notification
> (iii) erxec (although still empty) does nothing, it already has a sharedEC,
> different from the default one
> (iv) now, erxec fetches the objects — would automatically give shared ones
> from its sharedEC, which, alas, contains nothing (the default one does).
>
> Thanks and all the best,
> OC
>
>
>
>
> From: "ocs@ocs" <email@hidden <mailto:email@hidden>>
> Date: Tuesday, August 21, 2018 at 11:21 AM
> To: Chuck Hill <email@hidden <mailto:email@hidden>>
> Cc: "email@hidden <mailto:email@hidden>"
> <email@hidden <mailto:email@hidden>>
> Subject: Re: Should ERXEC get sharedEC automagically?
>
> Chuck,
>
>
>
> On 21 Aug 2018, at 7:50 PM, Chuck Hill <email@hidden
> <mailto:email@hidden>> wrote:
>
> See er.extensions.ERXEC.useSharedEditingContext at
> https://wiki.wocommunity.org/display/documentation/Explanation+of+the+default+properties+in+a+Wonder+project
>
> <https://wiki.wocommunity.org/display/documentation/Explanation+of+the+default+properties+in+a+Wonder+project>
>
> Thanks a lot!
>
> (Why on earth don't they mention this on the ERXEC documentation page? Oh,
> never mind.)
>
>
>
> Did that fix it?
>
> Well, sort of.
>
> It gets curiouser and curiouser — in other words, I must be doing something
> far wrong.
>
> When I set the “ERXEC.useSharedEditingContext” property to true, then
>
> - the newly created ERXEC gets a shared editing context immediately upon
> creation, not later upon receiving
> DefaultSharedEditingContextWasInitializedNotification;
> - and it is a different shared EC instance, not
> EOSharedEditingContext.defaultSharedEditingContext()
> - but it is EOSharedEditingContext.defaultSharedEditingContext() who reads in
> automatically all the shared EOs
> - and therefore, when fetching EOs through the ERXEC, I am still getting
> non-shared ones in the ERXEC (for its own sharedEC is empty, and thus
> EOSharedEditingContext.defaultSharedEditingContext is ignored).
>
> Can you make any sense of that?
>
> Thanks again a very big lot,
> OC
>
>
>
>
>
> On 2018-08-21, 9:43 AM, "Webobjects-dev on behalf of ocs@ocs"
> <webobjects-dev-bounces+chill=email@hidden
> <mailto:webobjects-dev-bounces+chill=email@hidden> on behalf
> of email@hidden <mailto:email@hidden>> wrote:
>
> Hi there,
>
> the EOEditing context doc pretty unequivocally says
>
> ===
> By default, an editing context that has no shared editing context listens
> for DefaultSharedEditingContextWasInitializedNotifications. If a notification
> is posted while the context has no registered objects, the editing context
> sets its shared editing context to the newly initialized default shared
> editing context.
> ===
>
> Should it apply for an ERXEC, too? I sort of inferred it would, but by my
> testing, it does not seem so: an ERXEC I make (through
> ERXEC.newEditingContext()) seems to adamantly stay without
> sharedEditingContext, although the notification is posted all right (I have
> observed it myself to be sure), and if there's a good ole EOEditingContext,
> it indeed duly sets its sharedEC at the time.
>
> Have I missed something of importance somewhere? The ERXEC documentation
> does not say essentially anything of the sharedEC, far as I can say:
>
> http://wonder.sourceforge.net/javadoc/er/extensions/ERXEC.html
> <http://wonder.sourceforge.net/javadoc/er/extensions/ERXEC.html>
>
> In principle, I could work around the problem by setting the sharedEC to
> all my ERXECs programmatically -- that works all right --, but it would be a
> lot of work, with a danger I overlook something somewhere and got bit in the
> tender parts by that...
>
> Thanks,
> OC
>
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