Hierarchical Handler Config
---------------------------

                 Key: SOLR-112
                 URL: https://issues.apache.org/jira/browse/SOLR-112
             Project: Solr
          Issue Type: Improvement
          Components: update
    Affects Versions: 1.2
            Reporter: Ryan McKinley
            Priority: Minor
             Fix For: 1.2
         Attachments: SOLR-112.patch

>From J.J. Larrea on SOLR-104

2. What would make this even more powerful would be the ability to "subclass" 
(meaning refine and/or extend) request handler configs: If the requestHandler 
element allowed an attribute extends="<another-requesthandler-name>" and 
chained the SolrParams, then one could do something like:

  <requestHandler name="search/products/all" class="solr.DisMaxRequestHandler" >
    <lst name="defaults">
     <float name="tie">0.01</float>
     <str name="qf">
        text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4
     </str>
     ... much more, per the "dismax" example in the sample solrconfig.xml ...
  </requestHandler>

  ... and replacing the "partitioned" example ...
  <requestHandler name="search/products/instock" extends="search/products/all" >
    <lst name="appends">
      <str name="fq">inStock:true</str>
    </lst>
  </requestHandler>


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