How to Use No DB connection App with task flow desined as 'New Transaction'

Question

Hi,
My application is fully depend on Custom java datasource implmentation and it requires no DB connection at all. I've done necessary implementation (http://andrejusb.blogspot.in/2012/03/use-case-for-adf-bc-with-no-database.html) by creating CustomDatabaseConnectionStrategy that says
    @Override
    public ApplicationModule createApplicationModule(Hashtable env) {
      env.put(Configuration.DB_REQUIRES_CONNECTION,Boolean.FALSE);
      env.put(PropertyMetadata.ENV_DO_FAILOVER.pName, PropertyConstants.FALSE);
      return super.createApplicationModule(env);
    }My application works fine until i keep my task flow transaction as 'No Controller transaction'. Yes, I use Dynamic tab shell template as UI. But when I keep it as 'Always Begin with New Transaction' and not to share the Data control, Screen is not at all getting rendered. I get some exception (I guess the moment I try to open the task flow, it is trying to get the connection. Since there is no connection available, It gives me this error. Is it so?)
One of my client requirement is to open the same screen under multiple tabs as a fresh screen (i.e. with different transaction. We do transaction through tuxedo transaction server). If I load a screen under first Tab with some data, added some record, deleted some record.. and If I load the same screen under another Tab, it should not refelect the same data whatever I have under first Tab.
Requirement:
I don't have DB connection in my app. But I should be able to define the task-flow to open with new instance of Application module whenever it is opened.
Your help on this would be appreciated.
Raghu

Answer 1

If I understand you requirements correctly, you do not need ADF taskflow transactions but you just need fresh DataControls. If it is so, then you do not have to set the taskflow's transaction behaviour to "Always Begin with New Transaction" (e.g. keep it to "No Controller Transaction"), but set the DataControl frame to "isolated" (e.g. uncheck the "Share data controls with the calling task flow" checkbox in the taskflow's Property Inspector). In this way each taskflow instance will be started in a different DataControl frame (e.g. it will instantiate its own set of ApplicationModule instances).
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