How to instantiate App Mod in bean not tied to a specific page or session

Question

I have come to the conclusion that I can't initialize the BC4J framework (e.g. initialize properties for the connection pool) until I create an instance of an App Mod. How can I do this in a static initializer block of a bean that is not tied to any particular page or user session or pageeContext?
I am trying to share the database connection pool across not only app modules but some of our pages that need to connect to the db but do not have app modules on them. But when I try to get the ConnectionPoolManager instance, it fails (UNLESS a page with an App Module on it was loaded first). If I try to get the instance first I get a nullpointer exception. Important note: I am in my own connection wrapper class so I do not have a session or pageContext.
I do this in my static initializer block of my class:
poolManager = ConnectionPoolManagerFactory.getConnectionPoolManager();
(this throws a null pointer exception)
and I've traced the error to this line in the ConnectionPoolManagerFactory getting null back:
String s = PropertyMetadata.PN_POOL_MANAGER.getProperty();
I suspect it is because the oracle.jbo.PropertyManager.loadProperties has not been run yet. The javadocs says: "This class is used at
framework initialization time to choose values for the various properties".
So, my questions are:
1) If I have to invoke an app mod instance to make this work....What's the simplest way to create an app mod instance from a bean that is
not tied to a session?
or 2)
1) Is there a way that I initialize the framework from my bean without instantiating an app module?

Answer 1

John,
First of all, thanks for the response. You provided workable answers for both possible approaches and I appreciate that. However, I am having a problem with both due to my unique situation....1) we are using JDeveloper 3.2 which doesn't have the SessionCookie class so while I can get an instance of an App Module, I can't do the next part which apparently is necessary to initialize the framework...2) I tried your other recommendation about calling the System.SetProperty method for the connection pool manager class and it worked!.....however, it instantiates the connection pool with default settings and not with my pool properties in my jboserver.properties file which I need.
Norm
Hi,
Please see the discussion thread at:
Re: Maintaining the state between http requests
for more information about using the BC4J connection pool from an external Object.
So, my questions are:
1) If I have to invoke an app mod instance to make this work....What's the simplest way to create
an app mod instance from a bean that is not tied to a session?.
You can use the oracle.jbo.common.ampool.PoolMgr directly to find/create a pool. For instance:
ApplicationPool pool = PoolMgr.getInstance().findPool(
"Mypackage1ModuleLocal" // pool name
, "mypackage1" // config package name
, "Mypackage1ModuleLocal" // config name
, null); // additional properties
SessionCookie cookie = pool.createSessionCookie(
DUMMY_APPLICATION_ID // application id
, DUMMY_SESSION_ID // session id
, null); // additional properties
cookie.useApplicationModule();
cookie.releaseApplicationModule(
true // checkin
, false); // manageState
pool.removeSessionCookie(cookie);
or 2)
1) Is there a way that I initialize the framework from my bean without instantiating an app module?.
Please see the original post referenced above.
Hope this helps.
JR