Gang,
In my quest to have a better grasp of the indexing/querying aspect of
Qi4j I implemented a working Index/Query service based on ElasticSearch
(http://www.elasticsearch.org/).
It has some limitations tough:
- don't support MatchesSpecification as ElasticSearch don't support
regex based queries/filters (yet, see the documentation) ;
- by default queries can only traverse @Aggregated associations, if you
want to be able to traverse all associations a configuration property
does the job but it should not be used if your domain model state has
circular associations.
So far it's working good in-memory, on-filesystem or in-cluster and pass
the whole index/query test-suite (validated on the CI) minus the regex
based queries. I tested it within one of my project with success too.
Documentation is available here:
http://qi4j.org/extension-index-elasticsearch.html
I had strong interest in indexing-solr but reading the code I understood
that while it implements indexing, queries are limited to native solr
queries. In other words, indexing-solr do not support the Qi4j query
API. I'll try to fix this if I get enough free cycles.
/Paul
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