I am going around in circles with a per-session eomodel connection and
I am looking for advice.
I have two models. One with data common to all application sessions
and one with data that should be used for connecting to a database
determined by data in the common model. This is the same as the setup
in EOEditingContext docs "Getting Data from Multiple Sources". The
difference is that one of the models is a per-session connection model
and the other is (or at least can be) consistently connected to a
single database.
The problem that I am running into is in changing the connection of
the session specific model and running into adaptorChannel problems.
I feel like I'm facing the wrong direction in looking for an answer
because the usual answer to my questions about webobjects is that
someone has figured this out before and it is much more straight
forward than I can see at the moment.
Should I be looking to remove the EOCooperatingObjectStore related to
the dynamic model, create a new one, add it to the
EOObjectStoreCoordinator for the session editing context? Does anybody
have any advice or examples or docs that might help with this?
Here is the problematic connection method on Session:
public void setDatabaseConnection(String dbname) {
// Get the model and adaptor
EOModel model = EOModelGroup.defaultGroup().modelNamed(
Application.VAEMR_MODELNAME);
EODatabaseContext dc = EODatabaseContext
.registeredDatabaseContextForModel(model,
EOObjectStoreCoordinator.defaultCoordinator());
EOAdaptor adaptor = dc.adaptorContext().adaptor();
if (adaptor.hasOpenChannels()) {
log.debug("has adaptor channels");
NSArray<EOAdaptorContext> ctxs = adaptor.contexts();
log.debug(ctxs.count() + " contexts");
for (int i = 0; i < ctxs.count(); i++) {
EOAdaptorContext ctx = (EOAdaptorContext)
ctxs.get(i);
NSArray chans = ctx.channels();
log.debug(chans.count() + " channels in this
context");
for (int j = 0; j < chans.count(); j++) {
EOAdaptorChannel chan =
(EOAdaptorChannel) chans.get(i);
chan.closeChannel();
}
}
}
NSDictionary<String,Object> prevConnDict =
adaptor.connectionDictionary();
emrConnectionDict = new NSMutableDictionary<String,
Object>(adaptor
.connectionDictionary());
Object[] args = { dbname };
emrConnectionDict.takeValueForKey(String.format(url, args),
"URL");
try {
adaptor.setConnectionDictionary(emrConnectionDict);
adaptor.assertConnectionDictionaryIsValid();
} catch (Throwable exception) {
exception.printStackTrace();
log.error(exception.toString());
log.error("reverting to previous connectionk
dictionary");
log.error(prevConnDict);
adaptor.setConnectionDictionary(prevConnDict);
}
EOModel common = EOModelGroup.defaultGroup().modelNamed(
Application.VACOMMON_MODELNAME);
EODatabaseContext dccommon = EODatabaseContext
.registeredDatabaseContextForModel(common, this
.defaultEditingContext());
EOAdaptor adaptorCommon = dccommon.adaptorContext().adaptor();
System.out.println("common connection");
System.out.println(adaptorCommon.connectionDictionary());
System.out.println("emr connection");
System.out.println(adaptor.connectionDictionary());
log.debug(emrConnectionDict);
} _______________________________________________
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