: I guess I got the wrong impression initially. These classes extend the : RequestHandlerBase.
your confusion is totally understandable, and stemms from some confusion legacy naming convention. there is an "UpdateHandler" API which is a low level API for dictating how changes are made to the underlying IndexWriter -- there is *NO* reason for anyone to ever do anything with this API (in my opinion) there is also a "SolrRequestHandler" which dictates how Solr deals with external requests, and what kind of input parsing it does. Some of these Request Handlers are designed for making "Updates" and many people (who aren't even aware of the "UpdateHandler" API mentioned above) informally refer to them as "Update Handlers" ... hence a lot of confusion. http://wiki.apache.org/solr/SolrPlugins -Hoss
