Chuck, hmmm... coudn't I somehow switch off temporarily the OSCPool, so that the initialisation code happens precisely as if there was no pool at all, and only then, when done, the pool starts behaving as normally? Actually I could benefit — if it is possible — from that, not only due to the SEC, but for other reasons as well (it would help if I could run the initialisation code against the DB in the “isolation=serializable/locking=pessimistic” mode, switching to “isolation=read_committed/locking=optimistic” for the normal processing).
The init code just reads some objects from the db (including INFORMATION_SCHEMA, which is the reason for the DB mode), checks them, potentially updates them, and that's that — if at this moment the application quits and immediately runs again without the init code, it would work just as well. But for the objects in the shared EC, there's no EO which the init code would create/fetch and a later session-based code would use anyhow. I might switch off the SEC for the initialisation completely: I would run the init code using an EC with its SEC explicitly set to null, then somehow trash the init EO stack completely and start afresh with a new one (or ones with OSCPool) and normal session-based processing. Can this, i.e., - to begin without OSCPool and connecting to DB in the “isolation=serializable/locking=pessimistic” mode; - do some stuff (without SEC), save changes; - completely trash the EO stack; - create a new one with OSCPool connecting to DB in the “isolation=read_committed/locking=optimistic” mode with SEC, and run happily ever after be done in some cleaner way than, well, restarting the application — which with some trickery exploiting Auto Recover in JavaMonitor might even prove possible, but would be super-ugly and I would rather do without? Thanks, OC > On 22 Aug 2018, at 5:11 AM, Chuck Hill <ch...@gevityinc.com> wrote: > > That is a good question. I’ve not used the combination. There must be some > code that uses the default instead of getting the SEC from the > EOEditingContext. There is a lot of code in Wonder (and some in WO) that > assumes the defaultWhatever is the only one that will ever exist. You would > have to step into the code to see where this is happening, or enable the > logging of stack traces of fetches. It should be a simple fix once you find > the spot. > > Chuck > > From: "ocs@ocs" <o...@ocs.cz <mailto:o...@ocs.cz>> > Date: Tuesday, August 21, 2018 at 1:02 PM > To: Chuck Hill <ch...@gevityinc.com <mailto:ch...@gevityinc.com>> > Cc: "webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>" > <webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>> > Subject: Re: Should ERXEC get sharedEC automagically? > > 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 <ch...@gevityinc.com > <mailto:ch...@gevityinc.com>> 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" <o...@ocs.cz <mailto:o...@ocs.cz>> > Date: Tuesday, August 21, 2018 at 12:23 PM > To: Chuck Hill <ch...@gevityinc.com <mailto:ch...@gevityinc.com>> > Cc: "webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>" > <webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>> > 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 <o...@ocs.cz <mailto:o...@ocs.cz>> wrote: > > Chuck, > > sorry, I did not describe the problem clearly enough... > > > > On 21 Aug 2018, at 8:39 PM, Chuck Hill <ch...@gevityinc.com > <mailto:ch...@gevityinc.com>> 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" <o...@ocs.cz <mailto:o...@ocs.cz>> > Date: Tuesday, August 21, 2018 at 11:21 AM > To: Chuck Hill <ch...@gevityinc.com <mailto:ch...@gevityinc.com>> > Cc: "webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>" > <webobjects-dev@lists.apple.com <mailto:webobjects-dev@lists.apple.com>> > Subject: Re: Should ERXEC get sharedEC automagically? > > Chuck, > > > > > On 21 Aug 2018, at 7:50 PM, Chuck Hill <ch...@gevityinc.com > <mailto:ch...@gevityinc.com>> 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=gevityinc....@lists.apple.com > <mailto:webobjects-dev-bounces+chill=gevityinc....@lists.apple.com> on behalf > of o...@ocs.cz <mailto:o...@ocs.cz>> 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 > > _______________________________________________ > Do not post admin requests to the list. 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