Re: Flow Database stuff ( The new FOM? )

[Christopher Oliver]

Reinhard Pötz wrote:

From: Jeremy Quinn 

 

What I do not grok ATM, how does the Hibernate Session automatically 
get closed at the appropriate time (ie. after the view layer has 
completed)?
   

IIU the current flow implementation correctly you have no chance but to
use lazy initializiation as implemented by you because after reaching
sendPageAndWait() the flow interpreter has no chance to react. Maybe
we need something like a "finalize" in pipeline processing where those
things (releasing of components) are done.
HTH
Reinhard
 

Actually, although not particularly user-friendly, there is a way to do 
this, even now, with the extended "catch" syntax supported by Rhino 
(which is intended to provide functionality similar to "dynamic-wind" in 
Scheme):

var hibSession = null;

function getSession() {
   if (hibSession == null) {
       hibSession = cocoon.getComponent("hibernateSession");
   }
}
function releaseSession() {
    if (hibSession != null) {
         cocoon.releaseComponent(hibSession);
         hibSession = null;
    }
}
catch (break) {
         // a continuation is being captured,  
         // code to handle that goes here
        releaseSession();
}

catch (continue) {
        // a continuation is being restored
        // code to handle that goes here
}
function myFlow() {
    var custBean = getSession().blah;
    sendPageAndWait("cust.xml", custBean);
    var anotherBean = getSession().blahblah
}