Re: Question about event ordering

[Cédric Damioli]

BTW, does someone know why events are actually in the exact reverse order ? I know the JCR spec states that events could be unordered, but could I rely on the fact that Jackrabbit "reverse order" events ? Regards, Cédric Le 07/02/2012 20:51, Ingomar Otter a écrit : Hi Julian! :-) In the meantime I did for once study the JCR spec and figured that the EventIterator passed into onEvent() in itself is just a fine event bundle demarcation. I just reversed the events inside and now I'm good to go. only needed and present in Journaled observation -- are you using that? No. But only because I discovered it too late ;-) Cheers, Ingomar Am 07.02.2012 um 19:16 schrieb Julian Reschke: On 2012-02-06 21:01, Ingomar Otter wrote: Hello, I am currently building a simple replication between two Jackrabbit instances. I've started off using (synchronous) Observers/Events but I am facing some challenges due to the (intresting?) event order. E.g. I add a file (using webdav) I see the following events (in that order): PROPERTY_ADDED,2@4376: /Somefile.png/jcr:content/jcr:data PROPERTY_ADDED,1@4377: /Somefile.png/jcr:content/jcr:mimeType PROPERTY_ADDED,7@4378: /Somefile.png/jcr:content/jcr:primaryType PROPERTY_ADDED,5@4379: /Somefile.png/jcr:content/jcr:lastModified PROPERTY_ADDED,5@4380: /Somefile.png/jcr:created NODE_ADDED@4381: /Somefile.png/jcr:content PROPERTY_ADDED,1@4382: /Somefile.png/jcr:createdBy PROPERTY_ADDED,7@4383: /Somefile.png/jcr:primaryType NODE_ADDED@4384 :/Somefile.png Of course I can not replay the events in that order as some parent nodes may be missing. I could re-order them but then this would at least require some "unit of work" demarcation as I operate on stream of events (and thus need to cluster/chunk) the events. Is there a reason why the events are emitted in 'reverse' order (I would assume per API the node was created first)? Is there a way to influence this? Afaik PERSIST (event bundling) is work-in-progress in unstable, would that be a candidate as Unit-Of-Work marker? In the meantime I realized that PERSIST events are not in 2.4.0 (but probably could be ported), and also that you may not need them; they are only needed and present in Journaled observation -- are you using that? Best regards, Julian -- www.anyware-services.com Inscrivez-vous à notre newsletter Cédric Damioli Directeur technique cedric.dami...@anyware-services.com Tel : +33(0)5 62 19 19 07 Mob : +33(0)6 87 03 61 63 Fax : +33(0)5 61 75 84 12 Adresse : Innopole 13 - 254 avenue de l'Occitane - B.P 97672 - 31676 LABEGE CEDEX - France Ametys: Smart Web CMS www.ametys.org Ce message et toutes les pièces jointes (le "Message") sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute modification, édition, utilisation ou diffusion non autorisée est interdite. Anyware Services décline toute responsabilité au titre de ce Message s'il a été altéré, déformé, falsifié ou édité, diffusé sans autorisation.