[Building Sakai] courier in Sakai 2.9

[Matthew Jones]

Agreed, the way presence was changed was to use jQuery to poll by itself
rather than rely on this service (changed in SAK-19129 - revision 82226
specifically). You could convert GAM to poll somewhere to see if there were
updates rather than using courier. You don't even need to poll against the
same Sakai server.

I don't remember how GAM worked, but it possibly needed some changes in the
portal to pick up the updates. You might be able (as a temporary
workaround) turn the old presence updates on with
display.users.present.iframe=true

But that would be less than super for performance! (And might not even be
in the neoskin?)

Recent releases of Tomcat 7 support web sockets, so this is seems like the
ideal for those on 2.9+ in these situations, and would probably give you
much better performance than a polling solution would, especially if you
had a lot of things polling.



On Wed, Jan 23, 2013 at 10:28 AM, Jim Eng <jimeng at umich.edu> wrote:

> Dave,
>
> The Courier Service was deprecated back in April.  It looks like you are
> aware of these tickets, but I'll mention them here:
>
>
>    - https://jira.sakaiproject.org/browse/SAK-22053
>    - https://jira.sakaiproject.org/browse/GAM-15
>
>
> Comments in the code say there are better ways to push messages to the
> client, but they do not say what the powers-that-be consider a better
> approach at this point.
>
> As I understand it, you are looking for info about how to enable courier
> deliveries in 2.9 and you will be looking for a better solution for 2.10.
>
> Jim
>
>
>
>
> On Jan 23, 2013, at 9:03 AM, David Haines wrote:
>
> At Michigan we're running a contrib tool that relies on courier.  With our
> upgrade to 2.9 the tool isn't working for us as courier no long runs
> regularly in 2.9.  Is there a simple way to just turn the courier back on?
>  In the long run we'll see if find an efficient way to avoid the courier
> overhead but in the immediate term we need to get this working. While chat
> in 2.9 uses the courier and keeps it running while the chat is open we
> can't rely on a single tool to switch the courier on and off.  The tool in
> question is Global Alerts which needs to be able to send it's broadcast
> messages to users regardless of the specific tool or site they are using.
>
> Any ideas are welcome.
>
> Thanks - Dave
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