Re: [windup-dev] Caching - global or vertex only? And what to cache?

Hi team, regarding graph REST HTTP requests caching - should it be global or rather per-vertex (per-model)? I started coding a global solution. If another model needs the same data, it will request from the same URL. I see no reason not to return the same object. Another question is what to cache. Due to how it's currently done, the getter is supposed to return Observable<...Model>. There are these options: 1) To cache an Observable which will wrap HTTP Observable. I don't know yet whether this will cause re-sending HTTP request for another subscriber. It will solve the Angular's change scanning, though, which is the bigger problem. Also, RxJS's cache() operator could be used to cache the HTTP response internally. 2) It can also resolve the Observable chain, and store the result into the cache asynchronously. So - when Angular would ask soon after, it would result in another request (maybe?); when called later, it would return the already available cached result. This would reduce the HTTP requests, but would not necessarily solve the Angular change scanning. 3) A combination of 1) and 2), which would cache * the Observables from 1) internally, so that the getter gets the same object each time, * the results from 2) so that the subsequent requests to the same URL don't generate another HTTP request, with some timeout so the page won't get staled. This one is a bit complicated but I think with some RxJS magic it can be done. Ondra -- -- Ondrej Zizka, Windup project, Brno _______________________________________________ windup-dev mailing list windup-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/windup-dev