How create a database connection only one for lot of AM

Question

Hi ,
In My Application am having lot of Application module its containing database connection per AM its connecting to same database only if i want to make it unique connction how i can proceed. which is correct way any one can help me
Thanks
Prabeethsoy

Answer 1

The source trace show how the JUApplication was created and saved to BindingContext.
1. private static void invokeBeginRequest(
BindingContext bindingCtx, HashMap requestCtx)
Object obj;
Iterator iter = bindingCtx.valuesIterator();
while (iter.hasNext())
obj = iter.next();
if (obj instanceof DCDataControlManagement)
2.First type is DCDataControlReference ====> ((DCDataControlManagement)obj).beginRequest(requestCtx);
3. ADFBindingFilter chain.doFilter(request, response);
4. DCDataControl control = actionBinding.getDataControl();
5. JUCtrlActionBinding
public final DCDataControl getDataControl()
if (mDataControl == null)
if (getDef() instanceof JUCtrlActionDef )
String name = ((JUCtrlActionDef)getDef()).getDataControlName();
if (name != null && getBindingContainer() != null)
BindingContext ctx = getBindingContainer().getBindingContext();
if (ctx != null)
6. ========>mDataControl = ctx.findDataControl(name);
if (mDataControl == null)
if (getIteratorBinding() != null)
mDataControl = getIteratorBinding().getDataControl();
else if (getBindingContainer() != null)
mDataControl = getBindingContainer().getDataControl();
return mDataControl;
7. BindingContext
public DCDataControl findDataControl(String name)
return (DCDataControl)get(name);
public Object get(Object key)
Object rtn = mDCMap.get(key);
if (rtn == null)
rtn = mBCMap.get(key);
else
if (rtn instanceof DCDataControlReference)
// remove the reference in order to prevent re-entrancy.
remove(key);
*8. Create JUApplicaion======> rtn = ((DCDataControlReference)rtn).getDataControl(this);*
*9. save JUApplication with AM ======>  put(key, rtn);*
return rtn;
10. DCDataControlReference
public DCDataControl getDataControl(BindingContext ctx)
String name = getName();
DataControlFactory factory;
try
Class factoryClass = JBOClass.forName(mDef.getFactoryClass());
factory = (DataControlFactory)factoryClass.newInstance();
catch(Exception e)
throw new JboException(e);
// JRS this is a backwards compatibility step. The generic
// DataControlFactoryImpl used to perform this mapping such
// that the bean class will be faulted back the definition class
// if null. I am performing this mapping at RT only in order
// to maintain the DT integrity (i.e. I don't want the DT to start
// faulting the bean class as the definition class when writing the
// DC def).
if (mDef.getBeanClass() == null)
mDef.setBeanClass(mDef.getDefinitionClass());
*11. create JUApplicaion =====> DCDataControl dc = (DCDataControl)factory.createSession(*
ctx, mDef.getName(), mUserParams, mDef);
SessionContext sessionCtx = ctx.getSessionContext();
if (sessionCtx != null)
dc.setSessionContext(sessionCtx);
// fire the deferred beginRequest notication on the new datacontrol
if (mRequestContext != null)
12.======>dc.beginRequest(mRequestContext);
mRequestContext = null;
return dc;
}