Liferay Portlet and JSF : Redirect during Render Phase
jsf-2, liferay, liferay-6, portlet, redirect
Solution
You can't do this in the render phase by design. Reasons:
- It's possible that portlets are rendered asynchronously, so the page might already be displayed when your portlet is being rendered
- It's possible that parts of the page are already delivered to the client, so that the HTTP Headers are already sent - for this reason, by design you don't have access to them in the render phase
- What would be the expected outcome if two portlets rendered on the same page would decide that they'd like to forwards to another page? Who would win?
A hacky workaround is to render some javascript redirect, but this is veeeery un-portal-like and can mess up other's expectations (plus, parts of the page might already be rendered, causing your users to fill a form only to be redirected by your javascript routine.
Please rethink the problem and come up with a different solution - it's really worth doing this in a portal environment.
Problem
I have a problem to implement a simple HTTP redirection. I use Liferay 6.0.6, our portlets are build with JSF2.0 / PortletFaces. I want to call a redirection when a view is loaded (and not when an action is triggered). Currently, my function is called by the PreRenderView listener. ``` <f:metadata> <f:event listener="#{myControler.dispatch}" type="preRenderView" /> </f:metadata> ``` In this function, i can check the permissions, do other stuff, and in some cases I want to redirect the user to a new page (not another view). I tried several methods, unsuccessfully. Specifically, I thought that this method would work : ``` getFacesContext().getExternalContext().redirect(url); getFacesContext().responseComplete() // => Can only redirect during ACTION_PHASE ``` This error is logical, but is there a solution to force the redirection. It could be realized in another function, called otherwise, I only need the Hibernate Session (set at the beginning of the Render Phase) Have you ideas to resolve this problem? Thanks! ps : `<redirect />` or `?faces-redirect` don't work with the portlets.