That sounds interesting for 2.0...
Rememeber that I am new to Portlets, but I think:
The major downside that I can picture, is that the
Portlets become aware that they are working on shared
data - thus they are no longer living in their own
little world. Using my simple example, the Cities
portlet will need to check a session variable on each
view request to check if it's data (the country) has
changed. This could quickly get out of control, as
there may be another event that it needs to check on,
and another as the system grows - thus a change to one
little portlet, may result in code changes necessary
all over the place.
I wonder if Spring offer anything out the box for
this? Perhaps some fAOP interceptors that let you
fire update events and then the wiring of the
interaction is extracted from the portlet
implementation - anyone seen this? I suspect it to
not be too hard to acheive.
Tim
--- Bruno Farache <[EMAIL PROTECTED]> wrote:
> Stefan, I've read that Portlet 2.0 will cover
> portlet events, do you have
> any idea how is it going to work?
> What are the disadvantages of using session to
> accomplish portlet
> communication?
>
> On 9/23/06, Stefan Zoerner <[EMAIL PROTECTED]>
> wrote:
> >
> > Hi Tim!
> >
> > Unfortunately, the Portlet 1.0 specification does
> not include events or
> > messages between two portlets. Some vendors offer
> proprietary solutions
> > here.
> >
> > If the portlets are within the same portlet
> application, you have the
> > option to share information between them via the
> portlet session. The
> > latter has two scopes, one of them (application
> scope) is per user and
> > portlet application.
> >
> > It is possible to add/update something in the
> session with this scope
> > during the processAction of the first portlet, and
> read/react with the
> > second portlet within the render phase.
> >
> > This proceeding has several disadvantages, but in
> your case, it may
> > work, and it is standard compliant (i.e. your
> portlets will run and
> > interact on all specification conformant portal
> servers).
> >
> > I hope this helps,
> > Stefan
> >
> >
> >
>
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