---- Hasnain Badami <[EMAIL PROTECTED]> schrieb: > Hi > > I am trying to upgrade my application from JSF 1.1.1 to JSF 1.2, using > myfaces 1.2. I am using multiple tabs in the same browser (same http > session) and am using client side state saving. Now when I am trying to > upgrade I want to know if its possible to use the server side state saving > in the same scenario using JSF 1.2 and how should I do it.
As far as I know, the state-saving functionality is identical in MyFaces 1.1 and MyFaces 1.2, ie there is nothing you can do with 1.2 that cannot be done in 1.1. > > This is necessary for me because I dont want too much data to be flowing > between the client and the server. As I'm sure you're aware, this is always a tradeoff. Client-side can be bad on a slow network. But it scales to more clients than server-side state does, because the server doesn't need ram to keep the client state in. Things are more interesting with multiple windows and server-side state though. I don't *think* this is supported for either MyFaces 1.1 or 1.2, though I could be wrong. Myfaces 1.1 definitely caches N old views in the user session, so that "back" buttons work (where N defaults to around 4). But AFAIK, this is an LRU cache, meaning that after 4 new pages the oldest cached tree is discarded. So if in tab 1 the user clicks through 4 pages, then tab 2's tree state has been lost and an error will occur when the user tries to use it. What would be necessary is to somehow tell the windows apart, and keep at least one JSF tree for each one but that seems tricky; I've never seen any code in MyFaces that does that. Anyone out there using concurrent windows with server-side state? > Secondly I think (I am not sure) client > side saving might encourage hostile user attacks. MyFaces 1.1 and 1.2 both have a feature to encrypt the client-side-state information. This is sufficient to prevent any hostile attacks. As far as I know this functionality is identical in MyFaces 1.1 and MyFaces 1.2. This is turned on with a context param in the web.xml file. There is documentation on this in the myfaces wiki. Regards, Simon
