Re: [xwiki-devs] [Investigation] Activity Stream Refactoring 6.2

Hello Eduard, It's funny that this happens right now, while we are fiddling in the ActivityStream (of XWiki 3.5.1, as subclassed by curriki). We are doing so to offer notifications for gpsnetwork.org: daily digests and immediate. So the first request is to enable a hook for immediate notification (a groovy page?) and digest notifications, I find. What I like in the use-cases is the notion of grouping (this tastes like a transaction id of some sort): I am sure we can make use of this in various places, including the way to track the series of save operations that happen when you create a document or resource (currently, Curriki has a minimum version numbers and, not surprisingly, one one of them was wrong). The big deal of performance and extensibility sounds quite hard to me. They are opposed to each other. We know that the ActivityStream can be hogged and we would avoid relying on it if we create some intensive event stream (e.g. in some form of analytics); nonetheless, the performance sounds reasonable thus far. Extensibility cannot happen thus far. We have… param1, param2, …, param5. And that is almost enough (we started to add one of them to be a json record to get more space!). The problem with extensibility is the storage form: If you add an event type, you add a hibernate mapping. Curriki has wrapped events for this: they are created based on param1, …, param5 and document names, when the stream is displayed. When pondering real hard core analytics, we have been considering a few alternatives, e.g. CouchDB or MongoDB. But this has never made its way. I am convinced Solr would do the trick too. Somehow, there must be storage forms that take advantage of the very peculiar nature of the event streams: - only inserts, no updates - reads that can be application defined, and probably can assert that an amount of events is not useful anymore. As for the all the research about the macro, we stay way from that, since Curriki has its own set of UIs. Paul On 18 juil. 2014, at 16:32, Eduard Moraru <enygma2002(a)gmail.com> wrote: