You can implement your own kind of SeachHandler to pass your custom request parameters to keep the common parameters clean. http://svn.apache.org/repos/asf/lucene/dev/trunk/solr/core/src/java/org/apache/solr/handler/component/SearchHandler.java
As you can see, the SearchHandler.handleRequestBody() method just takes expected parameters from the SolrQueryRequest request. Your own handler can expect more parameters than those defined in the CommonParams interface. https://svn.apache.org/repos/asf/lucene/dev/trunk/solr/solrj/src/java/org/apache/solr/common/params/CommonParams.java These are the base classes whose extensions might be useful for the development. http://svn.apache.org/repos/asf/lucene/dev/trunk/solr/core/src/java/org/apache/solr/handler/RequestHandlerBase.java http://svn.apache.org/repos/asf/lucene/dev/trunk/solr/core/src/java/org/apache/solr/handler/component/SearchComponent.java You can find more information about the request handlers and the search components in the guide. https://cwiki.apache.org/confluence/display/solr/RequestHandlers+and+SearchComponents+in+SolrConfig
