http://ayende.comAyende @ RahienCopyright (C) Ayende Rahien 2004 - 2021 (c) 202660Ok sorted it out, the last unstable doesn't really seem to be the latest. Got the penultimate and it works. Nice feature!http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment27http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment27Tue, 24 Jul 2012 13:35:29 GMTI have downloaded the latest unstable build but I can't see the Changes method on the document store. Is it available already?http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment26http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment26Tue, 24 Jul 2012 12:36:47 GMTEd, I think RX is awesome, and yes, it does significantly reduces the codehttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment25http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment25Sat, 21 Jul 2012 17:12:13 GMTAyende, what is your view on RX? In an a-sync env (in a key Silverlight app in our company) I noticed it can slice the complexity and source line count into half. Are you going to use it more ?http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment24http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment24Sat, 21 Jul 2012 13:56:00 GMTKele, It is using IObservable, yes. You are free to use RX on top of that too.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment23http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment23Sat, 21 Jul 2012 07:29:14 GMTIs that using IObservable from RX? Have you considered the queryable version (IQbservable)?http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment22http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment22Sat, 21 Jul 2012 05:33:33 GMTSony, Define your app system user in ldap, yes.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment21http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment21Fri, 20 Jul 2012 19:12:26 GMTBrian, Yeshttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment20http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment20Fri, 20 Jul 2012 19:11:51 GMTWill there be any way to automatically tie this in with the aggressive caching? It would be great to be able to set a document to be aggressively cached until it is updated on the database.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment19http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment19Fri, 20 Jul 2012 19:03:56 GMTSimone, It will be later todayhttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment18http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment18Fri, 20 Jul 2012 09:51:02 GMTIs this feature available already in nightly builds?http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment17http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment17Fri, 20 Jul 2012 09:50:01 GMTCongrats, Ayende! I get excited just by thinking how awesome is this. Having async notifications on everything on the database level - not client specific - is opening up a big number of user experience(among other) improvements one could make. I actually thought about 6-7 ways to use this feature in just 5 minutes of thinking about it. Good work, man! http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment16http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment16Fri, 20 Jul 2012 09:07:48 GMTAndrej, Yes, you canhttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment15http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment15Fri, 20 Jul 2012 08:49:46 GMTI have one question: can i subscribe to documents that is not yet created? My use case is - 1) I'm generating guid in browser, 2) I'm sending command to create new entity with that guid to web backend 3) Web backend then sends that command to aggregate, aggregate generate events 4) View builder (that is subscribed to those events) updates web view db (raven) 5) And here i would like raven to inform my web backend about updated views and from there i will get this info to browser by signalR. This means that i have to subscribe to raven at step 3. At that step i will have new document guid and type, but doc still won't be in raven. http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment14http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment14Fri, 20 Jul 2012 07:47:12 GMTlol who would have guessed :) looking fw for a post on that. btw the SignalR gang are just around the corner from my office. ping if you want to connecthttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment13http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment13Fri, 20 Jul 2012 06:57:23 GMTGuys, This is actually NOT using SignalR. We tried using SignalR and couldn't make it (next post will discuss this in details). It is our own implementation.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment12http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment12Fri, 20 Jul 2012 05:26:05 GMTPaul, Yes, it will work for embedded as well.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment11http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment11Fri, 20 Jul 2012 05:25:10 GMTThis has a suspicious smell of SignalR to me :)http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment10http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment10Fri, 20 Jul 2012 04:26:29 GMTAmazing! Congratulations to this feature - it is really a game changer!http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment9http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment9Fri, 20 Jul 2012 03:58:01 GMTSignalR ftw this can do wonders to cache invalidation. btw these days if you had to re-implement ravenDB from the floor up, you might have had Storage+Subscription => feeding indexes ...http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment8http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment8Fri, 20 Jul 2012 00:11:14 GMTKick ass feature!!http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment7http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment7Thu, 19 Jul 2012 23:22:16 GMTThis is exactly what I was looking into a day or so ago. And since I saw signalR embedded in there, I was hoping that would be why. Now to figure out how to get it to work on a web server :)http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment6http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment6Thu, 19 Jul 2012 23:11:32 GMT@Thomas: I think the syntax as is works well since it's not necessarily a document that you may subscribe to but in fact something wider. This leaves that distinction open.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment5http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment5Thu, 19 Jul 2012 23:06:46 GMTThis is awesome. I have a task queue implemented on top of RavenDB, and I have a timer polling the database every few seconds to check for new tasks. Being able to subscribe to new tasks would be amazing. Will it work on embedded document stores? Paulhttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment4http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment4Thu, 19 Jul 2012 23:02:07 GMTVery nice! However the API seems redundant; I would change it to this: store.Changes() .Document("orders/1293") .Subscribe(Reload);http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment3http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment3Thu, 19 Jul 2012 22:49:09 GMT http://suzumiyayuki.files.wordpress.com/2012/01/mind-blown.gifhttp://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment2http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment2Thu, 19 Jul 2012 22:48:08 GMTnice work. extremely compelling and extensively useful for a host of scenarios.http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment1http://ayende.com/157121/awesome-feature-of-the-day-ravendb-changes-api#comment1Thu, 19 Jul 2012 22:44:24 GMT