On Mon, Apr 30, 2012 at 7:08 AM, Andrea Aime <[email protected]> wrote: > On Sun, Apr 29, 2012 at 5:24 PM, Alessio Fabiani > <[email protected]> wrote: >> >> 2. Technically speaking: >> a) are we sure the Predicate is the best option? Why not using Generic >> DAOs? Do we have something already in place that performs filtering and >> pagination at lower level? > > > The current DAO in GeoServer is the CatalogFacade. No, we don't have > anything prior to this GSIP that can handle filtering, pagination and > sorting. > How filtering/pagination that is done is left to the specific > implementation, the in memory one just scan the whole set of beans, the > secondary storage > ones try to encode the data access indications in the native language of the > storage (SQL for JDBC databases) > >> >> b) I guess any extension to the catalog is nice but almost unuseful until >> we have everything in memory. We should envisage on such improvements the >> possibility of serializing/deserializing objects on the fly and introduction >> of Level 1 and possibly Level 2 Caching mechanisms. > > > Yeah, the two community extensions do at least part of that, whether caching > should sit on top of a persisten mechanism or inside > it is a matter of design, both solutions are applicable today (but none is > truly implemented, besides some light caching I've > see in the jdbc store)
Just a quick one on caching. I managed to update the branch in sensible squashed commits[1]. The old one is still available for reference[2]. The jdbcconfig module uses caching. The construction of the cache is decoupled from it though[3]. Current default implementation of a cache provider is very light, it needs to be made configurable [4]. By the other hand, I have working exploratory prototype that uses a distributed cache among nodes in a cluster[5], backed by a distributed concurrent map, with a number of configurable properties[6]. Cheers, Gabriel [1] <https://github.com/groldan/geoserver/tree/GSIP69> [2] <https://github.com/groldan/geoserver/tree/GSIP69_old> [3] <https://github.com/groldan/geoserver/blob/GSIP69/src/community/jdbcconfig/src/main/java/org/geoserver/jdbcconfig/internal/ConfigDatabase.java#L97> [4] <https://github.com/groldan/geoserver/blob/GSIP69/src/main/src/main/java/org/geoserver/util/DefaultCacheProvider.java> [5] <https://github.com/groldan/geoserver/blob/scalability_clustering/src/community/cluster/src/main/java/org/geoserver/cluster/DistributedCacheProvider.java> [6] <https://github.com/groldan/geoserver/blob/scalability_clustering/src/community/cluster/src/main/java/org/geoserver/cluster/DistributedCacheProvider.java> > > Cheers > Andrea > > -- > ------------------------------------------------------- > Ing. Andrea Aime > GeoSolutions S.A.S. > Tech lead > > Via Poggio alle Viti 1187 > 55054 Massarosa (LU) > Italy > > phone: +39 0584 962313 > fax: +39 0584 962313 > mob: +39 339 8844549 > > http://www.geo-solutions.it > http://geo-solutions.blogspot.com/ > http://www.youtube.com/user/GeoSolutionsIT > http://www.linkedin.com/in/andreaaime > http://twitter.com/geowolf > > ------------------------------------------------------- > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Geoserver-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-devel > -- Gabriel Roldan OpenGeo - http://opengeo.org Expert service straight from the developers. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Geoserver-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-devel
