Hi René,
I have found a solution for my problems:
In the JavaMonitor I have configured two applications with the same
binaries. The only difference is a VM parameter -Dconfigfile=foo.config
in the first application and the parameter -Dconfigfile=bar.config in
the other application.
With these parameters I can use different database configurations, which
are stored into the configuration files.
In the Application class I can use
FileInputStream fs = new FileInputStream(System.getProperty("user.dir")
+ System.getProperty("file.separator") +
System.getProperty("configfile"));
Properties p = new Properties();
p.load(fs);
to get the database credentials. According to your post, in the model I
have removed all connections, this will result in an Exception, if I
access an EOEditingContext (i.e. within a Session). To prevent that, I
set the connection within the Application class, before any access to
the database.
EOModel model = EOModelGroup.defaultGroup().modelNamed("MyModelName");
EODatabaseContext dc =
EODatabaseContext.registeredDatabaseContextForModel(model, new
EOEditingContext());
EOAdaptor da = dc.adaptorContext().adaptor();
The database credentials I can store into an NSMutableDictionary:
NSMutableDictionary cred = new NSMutableDictionary();
cred.takeValueForKey(p.getProperty("username"), "username");
cred.takeValueForKey(p.getProperty("password"), "password");
cred.takeValueForKey(p.getProperty("url"), "URL");
cred.takeValueForKey(p.getProperty("driver"), "driver");
Then I set the new ConnectionDictionary for the EOAdapter and EOModel:
da.setConnectionDictionary(cred);
model.setConnectionDictionary(cred);
This works also for all other EOEditingContext instances within the
application, I don't have to switch the connection for every new EC
instance.
Some ideas I got from https://stackoverflow.com/questions/13459208 and
http://mirror.informatimago.com/next/developer.apple.com/documentation/WebObjects/Enterprise_Objects/Connecting/chapter_10_section_8.html#//apple_ref/doc/uid/TP30001011-DontLinkChapterID_6-TPXREF144
Best regards
André
Am 2017-11-06 17:05, schrieb René Bock:
Hi André
we don't store database connection infos in the eo-model. Instead we
follow:
https://wiki.wocommunity.org/display/documentation/Best+Practices-Properties+Files
e.g:
dbConnectURLGLOBAL=jdbc:mysql://localhost/DbName
dbConnectUserGLOBAL=ojp
dbConnectPasswordGLOBAL=XXXXX
dbEOPrototypesEntityGLOBAL=EOJDBCMySQLPrototypes
dbConnectPluginGLOBAL=MySQLPlugIn
Am 06.11.2017 um 16:55 schrieb André Rothe <andre.ro...@phosco.info>:
Hi,
three questions according the database connection:
I have a model, which has a database connection defined in a
connection dictionary. But the model should not open the connection
per default, it should get the credentials from another property file
which will differ between the instances of the application in the
JavaMonitor. If I use this solution:
http://mirror.informatimago.com/next/developer.apple.com/documentation/WebObjects/Enterprise_Objects/Connecting/chapter_10_section_8.html
the app will connect to the default database and makes then a
reconnect to the later provided database. Is it possible to prevent
the first connect?
If I use multiple EOEditingContexts in my application, I have to
change the connection parameters for every EC. When is the best time
to set these for the session.defaultEditingContext()? Can I get the
current connection credentials from an EditingContext instance to use
it on another EC instance?
Thank you.
Best regards
André
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