How/Where to store current page details in ADF?

Question

Hi All,
What is the best way to populate the managedBean while loading the page?
In my application, I have an page fragment which display the user details from Webservice DataControl. I drag and drop the webservice data control in to the pageFragment. This fragment has mapped in the taskFlow and the taskFlow as attached in to main JSPX page as a region. I need to store this user information to any place (ManagedBean / or anyother best place to store) which I can use throughout my application, since I dont want to reexecute the webservice each time to get the same user information. Also I want to collect and store this info while I render the main page, not after any user action.
Please advice how & where to store the information in ADF? Can I create an managedBean? If so how to trigger that class method at page load?
Thanks
kln

Answer 1

Hi,
in this case you configure the managed bean to be in session scope. Then, on the first page, you define a phase listener for the after restore phase (its a tag on the f:view element). This phaselistener references the managed bean using EL (important). It can do so using a method expression in JSF. For example, if the managed bean had a method populateUserInfo then yu could reference #{beanname.populateUserInfo} and execute the method expression using Java. In the managed bean, the method would access the binding layer Using the BindingContext class
http://download.oracle.com/docs/cd/E15051_01/apirefs.1111/e10653/oracle/adf/model/BindingContext.html
Call
BindingContext .getCurrent().getCurrentBindingsEntry() to obtain a handle to the active instance of BindingContainer.
BindingContainer bindings = BindingContext .getCurrent().getCurrentBindingsEntry();
Then on the binding container, you invoke the method to query the Web Service for the user info
//before you can call a method on the ADF binding layer, make sure the ADF binding is created for the method
OperationBinding opws = (OperationBinding) bindings.get("name of the method exposed on WS");
//if you need to pass parameters
opws.getParamsMap().put("argument name",value);
opws.execute();
You can use similar code to access the user information from the method iterator in ADF to populate the managed bean fields. You can then access user information from the managed bean through getter and setter methods
Frank
Ps.: I know the description is a bit rough. I'll see if I can come up with a blog sample to a later time
Edited by: Frank Nimphius on Jan 26, 2010 5:43 PM