Hi Paul, On Oct 21, 2008, at 9:57 AM, Paul Libbrecht wrote:
> Vincent, > > is this livable with the dynamic object system of XWiki? > HQL is hard in XWiki but it's immensely powerful. > I used to hate Hibernate before working with XWiki but I can't find > any equivalent yet. > As far as I know joins would be missing in compass. > > So would you make the xwiki query language (I just heard whispers > about it) as a prerequisite before moving to compass or another? The idea is not to replace the storage... :) Only to improve our current lucene search plugin. Thanks -Vincent > Le 21-oct.-08 à 09:43, Vincent Massol a écrit : > >> I think it would be nice to look at Compass >> (http://www.compass-project.org/overview.html >> ) or Hibernate Search (http://www.hibernate.org/410.html) for the >> future. >> >> I think Compass is better for us since we don't want to rely on >> Hibernate for our storage in the future. >> >> Here are some features of Compass: >> >> " >> - Simple Compass provides a simple API for working with Lucene. If >> you >> know how to use an ORM, then you will feel right at home with Compass >> with simple operations for save, and delete & query. >> - Lucene Building on top of Lucene, Compass simplifies common usage >> patterns of Lucene such as google-style search, index updates as well >> as more advanced concepts such as caching and index sharding (sub >> indexes). Compass also uses built in optimizations for concurrent >> commits and merges. >> - Mapping Compass provides support for mapping of different data >> "formats" - indexing and storing (caching) them in the Search Engine: >> Object to Search Engine Mapping (using annotations or xml), XML to >> Search Engine Mapping (using simple xpath expressions), and the low >> level Resource to Search Engine Mappping. >> - Tx Compass provides a transactional API on top of the Search Engine >> supporting different transaction isolation levels. Externally, >> Compass >> provides a local transaction manager as well as integration with >> external transaction managers such as JTA (Sync and XA), Spring, and >> ORM ones. >> - ORM Compass integrates seamlessly with most popular ORM frameworks >> allowing automatic mirroring, to the index, of the changes in data >> performed via the ORM tool. Compass has generic support for JPA as >> well as embedded support for Hibernate, OpenJPA, TopLink Essentials, >> and EclipseLink allow to add Compass using three simple steps. >> - Spring Compass integrates seamlessly with Spring. Compass can be >> easily configured using Spring, integrates with Spring transaction >> management, has support for Spring MVC, and has Spring aspects built >> in for reflecting operations to the search engine. >> - Distributed Compass simplifies the creation of distributed Lucene >> index by allowing to store the Lucene index in a database, as well as >> storing the index simply with Data Grid products such as GigaSpaces, >> Coherence and Terracotta. >> " >> >> The last point is especially important for our distributed lucene >> searcg feature developed during the GSOC. >> >> Thanks >> -Vincent _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
