On 22-Jul-08, at 4:34 PM, Chris Hostetter wrote:
Hey everybody, I'll be giving a talk called "Apache Solr: Beyond the
Box" at ApacheCon this year, which will focus on the how/when/why of
writing Solr Plugins...
http://us.apachecon.com/c/acus2008/sessions/10
I've got several use cases I can refer to for examples, both from my
day job and from public projects (DIH, Local Solr, etc.) but I'm
hoping to be able to provide even broader examples of the types of
"niche" plugins people have written for specific purposes, and what
their motivations where for doing so (as opposed to doing alternate
logic in their client).
If people would like to reply to this thread to share a little bit
of information about their experiences, that would be awesome -- in
addition to helping me write my slides, it would help other Solr
users be aware of what's possible (and help Solr developers be more
aware of how our users are taking advantage of the APIs).
analysis:
- a WDF that handles some special-case tokens (e.g., '.NET') and
that doesn't split tokens that are a series of small components (e.g.,
r2d2) for performance
- analyzers to incorporate payloads
- custom token splitters
highlighting:
- custom scorer, fragmenter
- request handler for highlighting specific docs without querying
custom queries/scoring:
- a "proximity" query that can handle cases where only a part of a
query is proximate
- a query similar to CustomScoreQuery that allows the arbitrary
combination of query scorers (e.g., product), but allows any Query
subclass (not just a ValueSourceQuery).
- a heavy modified version of dismax that incorporates the above
query types along with payloads and other features like query-injected
filter queries. This type of extension is largely obsolete with
QueryComponents
Let me know if you want more detail--most of this is relative to a
somewhat older version of Solr, so it might not all apply.
cheers,
-Mike
