John Huss wrote on 3/28/06 10:23 AM:
I was curious how most of you specify the URL of your database in
EOModeler. Do you use localhost, etc, or the actual address of the
server? What I mean is, do you connect to the production database
while developing and/or testing, or do you just use a local version?
I connect to localhost and use an external properties file to replace
the DB connection properties (username, password). For example, an app's
internal Properties file will contain only a single line:
props.path = /var/app_dir/app.properties
and the actual properties are all in app.properties. That file path,
/var/app_dir/app.properties, exists on both my dev and production
machines. By keeping an application's runtime props in a file that isn't
affected by each deployment, I don't have to worry about deploying an
app and forgetting to change its settings from dev to production.
Specifically WRT model parameters, my app.properties file contains the
following:
modelname.username = dbuser
modelname.password = dbpassword
modelname.database = dbname
and I have the following method in Application.java. I suppose I could
add a modelname.URL param as well to point to an external DB, but I
haven't tried that.
/**
* Intercept add-model notifications and reset the authentication
* fields in the model's connection dictionary if System.properties
* contains a username and password for this model.
*
* @param notification container for EOModel being added
*/
public void receiveModelAddedNotification(NSNotification notification)
{
EOModel model = (EOModel) notification.object();
String username = System.getProperty(model.name() + ".username");
String password = System.getProperty(model.name() + ".password");
if (username != null && password != null)
{
NSMutableDictionary connD =
model.connectionDictionary().mutableClone();
connD.setObjectForKey( username, "username");
connD.setObjectForKey( password, "password");
model.setConnectionDictionary(connD);
}
}
HTH,
zak.
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