<?xml version="1.0" ?>
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 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
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     http://www.apache.org/licenses/LICENSE-2.0

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 distributed under the License is distributed on an "AS IS" BASIS,
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 See the License for the specific language governing permissions and
 limitations under the License.
-->

<config>
  <!-- Set this to 'false' if you want solr to continue working after it has 
       encountered an severe configuration error.  In a production environment, 
       you may want solr to keep working even if one handler is mis-configured.

       You may also set this to false using by setting the system property:
         -Dsolr.abortOnConfigurationError=false
     -->
  <abortOnConfigurationError>${solr.abortOnConfigurationError:true}</abortOnConfigurationError>

  <!-- Used to specify an alternate directory to hold all index data
       other than the default ./data under the Solr home.
       If replication is in use, this should match the replication configuration. -->
  <dataDir>${solr.data.dir:}</dataDir>

  <indexDefaults>
   <!-- Values here affect all index writers and act as a default unless overridden. -->
    <useCompoundFile>false</useCompoundFile>
    <ramBufferSizeMB>32</ramBufferSizeMB>
    <mergeFactor>10</mergeFactor>
    <maxMergeDocs>2147483647</maxMergeDocs>
    <maxFieldLength>10000</maxFieldLength>
    <writeLockTimeout>1000</writeLockTimeout>
  </indexDefaults>

  <mainIndex>
    <!-- options specific to the main on-disk lucene index -->
    <useCompoundFile>false</useCompoundFile>
    <ramBufferSizeMB>32</ramBufferSizeMB>
    <mergeFactor>10</mergeFactor>
    <maxMergeDocs>2147483647</maxMergeDocs>
    <maxFieldLength>10000</maxFieldLength>

    <!-- If true, unlock any held write or commit locks on startup. 
         This defeats the locking mechanism that allows multiple
         processes to safely access a lucene index, and should be
         used with care. -->
    <unlockOnStartup>false</unlockOnStartup>
  </mainIndex>

  <!-- the default high-performance update handler -->
  <updateHandler class="solr.DirectUpdateHandler2">

    <!-- A prefix of "solr." for class names is an alias that
         causes solr to search appropriate packages, including
         org.apache.solr.(search|update|request|core|analysis)
     -->

    <!-- autocommit pending docs if certain criteria are met 
    <autoCommit> 
      <maxDocs>10000</maxDocs>
      <maxTime>1000</maxTime>
    </autoCommit>
    -->

    <!-- The RunExecutableListener executes an external command.
         exe - the name of the executable to run
         dir - dir to use as the current working directory. default="."
         wait - the calling thread waits until the executable returns. default="true"
         args - the arguments to pass to the program.  default=nothing
         env - environment variables to set.  default=nothing
      -->
    <!-- A postCommit event is fired after every commit or optimize command
    <listener event="postCommit" class="solr.RunExecutableListener">
      <str name="exe">snapshooter</str>
      <str name="dir">solr/bin</str>
      <bool name="wait">true</bool>
      <arr name="args"> <str>arg1</str> <str>arg2</str> </arr>
      <arr name="env"> <str>MYVAR=val1</str> </arr>
    </listener>
    -->
    <!-- A postOptimize event is fired only after every optimize command, useful
         in conjunction with index distribution to only distribute optimized indicies 
    <listener event="postOptimize" class="solr.RunExecutableListener">
      <str name="exe">snapshooter</str>
      <str name="dir">solr/bin</str>
      <bool name="wait">true</bool>
    </listener>
    -->

  </updateHandler>


  <query>
    <!-- Maximum number of clauses in a boolean query... can affect
        range or prefix queries that expand to big boolean
        queries.  An exception is thrown if exceeded.  -->
    <maxBooleanClauses>1024</maxBooleanClauses>

    
    <!-- Cache used by SolrIndexSearcher for filters (DocSets),
         unordered sets of *all* documents that match a query.
         When a new searcher is opened, its caches may be prepopulated
         or "autowarmed" using data from caches in the old searcher.
         autowarmCount is the number of items to prepopulate.  For LRUCache,
         the autowarmed items will be the most recently accessed items.
       Parameters:
         class - the SolrCache implementation (currently only LRUCache)
         size - the maximum number of entries in the cache
         initialSize - the initial capacity (number of entries) of
           the cache.  (seel java.util.HashMap)
         autowarmCount - the number of entries to prepopulate from
           and old cache.
         -->
    <filterCache
      class="solr.LRUCache"
      size="512"
      initialSize="512"
      autowarmCount="256"/>

   <!-- queryResultCache caches results of searches - ordered lists of
         document ids (DocList) based on a query, a sort, and the range
         of documents requested.  -->
    <queryResultCache
      class="solr.LRUCache"
      size="512"
      initialSize="512"
      autowarmCount="256"/>

  <!-- documentCache caches Lucene Document objects (the stored fields for each document).
       Since Lucene internal document ids are transient, this cache will not be autowarmed.  -->
    <documentCache
      class="solr.LRUCache"
      size="512"
      initialSize="512"
      autowarmCount="0"/>

    <!-- If true, stored fields that are not requested will be loaded lazily.
    -->
    <enableLazyFieldLoading>false</enableLazyFieldLoading>

    <!-- Example of a generic cache.  These caches may be accessed by name
         through SolrIndexSearcher.getCache(),cacheLookup(), and cacheInsert().
         The purpose is to enable easy caching of user/application level data.
         The regenerator argument should be specified as an implementation
         of solr.search.CacheRegenerator if autowarming is desired.  -->
    <!--
    <cache name="myUserCache"
      class="solr.LRUCache"
      size="4096"
      initialSize="1024"
      autowarmCount="1024"
      regenerator="org.mycompany.mypackage.MyRegenerator"
      />
    -->

   <!-- An optimization that attempts to use a filter to satisfy a search.
         If the requested sort does not include score, then the filterCache
         will be checked for a filter matching the query. If found, the filter
         will be used as the source of document ids, and then the sort will be
         applied to that.
    <useFilterForSortedQuery>true</useFilterForSortedQuery>
   -->

   <!-- An optimization for use with the queryResultCache.  When a search
         is requested, a superset of the requested number of document ids
         are collected.  For example, if a search for a particular query
         requests matching documents 10 through 19, and queryWindowSize is 50,
         then documents 0 through 50 will be collected and cached.  Any further
         requests in that range can be satisfied via the cache.  -->
    <queryResultWindowSize>10</queryResultWindowSize>

    <!-- This entry enables an int hash representation for filters (DocSets)
         when the number of items in the set is less than maxSize.  For smaller
         sets, this representation is more memory efficient, more efficient to
         iterate over, and faster to take intersections.  -->
    <HashDocSet maxSize="3000" loadFactor="0.75"/>


    <!-- boolToFilterOptimizer converts boolean clauses with zero boost
         into cached filters if the number of docs selected by the clause exceeds
         the threshold (represented as a fraction of the total index) -->
    <boolTofilterOptimizer enabled="true" cacheSize="32" threshold=".05"/>


    <!-- a newSearcher event is fired whenever a new searcher is being prepared
         and there is a current searcher handling requests (aka registered). -->
    <!-- QuerySenderListener takes an array of NamedList and executes a
         local query request for each NamedList in sequence. -->
    <!--
    <listener event="newSearcher" class="solr.QuerySenderListener">
      <arr name="queries">
        <lst> <str name="q">solr</str> <str name="start">0</str> <str name="rows">10</str> </lst>
        <lst> <str name="q">rocks</str> <str name="start">0</str> <str name="rows">10</str> </lst>
      </arr>
    </listener>
    -->

    <!-- a firstSearcher event is fired whenever a new searcher is being
         prepared but there is no current registered searcher to handle
         requests or to gain autowarming data from. -->
    <!--
    <listener event="firstSearcher" class="solr.QuerySenderListener">
      <arr name="queries">
        <lst> <str name="q">fast_warm</str> <str name="start">0</str> <str name="rows">10</str> </lst>
      </arr>
    </listener>
    -->

    <!-- If a search request comes in and there is no current registered searcher,
         then immediately register the still warming searcher and use it.  If
         "false" then all requests will block until the first searcher is done
         warming. -->
    <useColdSearcher>false</useColdSearcher>

    <!-- Maximum number of searchers that may be warming in the background
      concurrently.  An error is returned if this limit is exceeded. Recommend
      1-2 for read-only slaves, higher for masters w/o cache warming. -->
    <maxWarmingSearchers>4</maxWarmingSearchers>

  </query>

  <!-- 
    Let the dispatch filter handler /select?qt=XXX
    handleSelect=true will use consistent error handling for /select and /update
    handleSelect=false will use solr1.1 style error formatting
    -->
  <requestDispatcher handleSelect="true" >
    <!--Make sure your system has some authentication before enabling remote streaming!  -->
    <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" />
  </requestDispatcher>
  
      
  <!-- requestHandler plugins... incoming queries will be dispatched to the
     correct handler based on the qt (query type) param matching the
     name of registered handlers.
     The "standard" request handler is the default and will be used if qt
     is not specified in the request.
  -->
  <requestHandler name="standard" class="solr.StandardRequestHandler">
    <!-- default values for query parameters -->
     <lst name="defaults">
       <str name="echoParams">explicit</str>
       <!-- 
       <int name="rows">10</int>
       <str name="fl">*</str>
       <str name="version">2.1</str>
        -->
     </lst>
  </requestHandler>




  <requestHandler name="browse" class="solr.DisMaxRequestHandler" >
    <lst name="defaults">
     <str name="echoParams">explicit</str>
     <str name="qf">text^1.0 title_text^2.0 description_text^1.5 id^10.0</str>
     <str name="mm">2&lt;-1 5&lt;-2 6&lt;90%</str>
     <str name="q.alt">*:*</str>
    </lst>
    <!-- In addition to defaults, "appends" params can be specified
         to identify values which should be appended to the list of
         multi-val params from the query (or the existing "defaults").

         In this example, the param "fq=instock:true" will be appended to
         any query time fq params the user may specify, as a mechanism for
         partitioning the index, independent of any user selected filtering
         that may also be desired (perhaps as a result of faceted searching).

         NOTE: there is *absolutely* nothing a client can do to prevent these
         "appends" values from being used, so don't use this mechanism
         unless you are sure you always want it.
      -->
    <lst name="appends">
    </lst>
    <!-- "invariants" are a way of letting the Solr maintainer lock down
         the options available to Solr clients.  Any params values
         specified here are used regardless of what values may be specified
         in either the query, the "defaults", or the "appends" params.

         In this example, the facet.field and facet.query params are fixed,
         limiting the facets clients can use.  Faceting is not turned on by
         default - but if the client does specify facet=true in the request,
         these are the only facets they will be able to see counts for;
         regardless of what other facet.field or facet.query params they
         may specify.

         NOTE: there is *absolutely* nothing a client can do to prevent these
         "invariants" values from being used, so don't use this mechanism
         unless you are sure you always want it.
      -->
    <lst name="invariants">
	  <str name="facet">on</str>
	  <str name="facet.mincount">1</str>
      <str name="facet.field">genre_facet</str>
      <str name="facet.field">medium_facet</str>
      <str name="facet.field">rating_facet</str>
      <str name="facet.field">publisher_facet</str>
    </lst>
  </requestHandler>


  <!-- SpellCheckerRequestHandler takes in a word (or several words) as the
       value of the "q" parameter and returns a list of alternative spelling
       suggestions.  If invoked with a ...&cmd=rebuild, it will rebuild the
       spellchecker index.
  -->
  <requestHandler name="spellchecker" class="solr.SpellCheckerRequestHandler">
    <!-- default values for query parameters -->
     <lst name="defaults">
       <int name="suggestionCount">1</int>
       <float name="accuracy">0.5</float>
     </lst>
     
     <!-- Main init params for handler -->
     
     <!-- The directory where your SpellChecker Index should live.   -->
     <!-- May be absolute, or relative to the Solr "dataDir" directory. -->
     <!-- If this option is not specified, a RAM directory will be used -->
     <str name="spellcheckerIndexDir">spell</str>
     
     <!-- the field in your schema that you want to be able to build -->
     <!-- your spell index on. This should be a field that uses a very -->
     <!-- simple FieldType without a lot of Analysis (ie: string) -->
     <str name="termSourceField">word</str>
     
   </requestHandler>

  
  <!-- Update request handler.  
  
       Note: Since solr1.1 requestHandlers requires a valid content type header if posted in 
       the body. For example, curl now requires: -H 'Content-type:text/xml; charset=utf-8'
       The response format differs from solr1.1 formatting and returns a standard error code.
       
       To enable solr1.1 behavior, remove the /update handler or change its path
    -->
  <requestHandler name="/update" class="solr.XmlUpdateRequestHandler" />

  <!-- CSV update handler, loaded on demand -->
  <requestHandler name="/update/csv" class="solr.CSVRequestHandler" startup="lazy" />

  <requestHandler name="/admin/" class="org.apache.solr.handler.admin.AdminHandlers" />
  
  <!-- Echo the request contents back to the client -->
  <requestHandler name="/debug/dump" class="solr.DumpRequestHandler" >
    <lst name="defaults">
     <str name="echoParams">explicit</str> <!-- for all params (including the default etc) use: 'all' -->
     <str name="echoHandler">true</str>
    </lst>
  </requestHandler>
  
  <!-- queryResponseWriter plugins... query responses will be written using the
    writer specified by the 'wt' request parameter matching the name of a registered
    writer.
    The "standard" writer is the default and will be used if 'wt' is not specified 
    in the request. XMLResponseWriter will be used if nothing is specified here.
    The json, python, and ruby writers are also available by default.

    <queryResponseWriter name="standard" class="solr.XMLResponseWriter"/>
    <queryResponseWriter name="json" class="solr.JSONResponseWriter"/>
    <queryResponseWriter name="python" class="solr.PythonResponseWriter"/>
    <queryResponseWriter name="ruby" class="solr.RubyResponseWriter"/>

    <queryResponseWriter name="custom" class="com.example.MyResponseWriter"/>
  -->

  <!-- XSLT response writer transforms the XML output by any xslt file found
       in Solr's conf/xslt directory.  Changes to xslt files are checked for
       every xsltCacheLifetimeSeconds.  
   -->
  <queryResponseWriter name="xslt" class="solr.XSLTResponseWriter">
    <int name="xsltCacheLifetimeSeconds">5</int>
  </queryResponseWriter> 
    
  <!-- config for the admin interface --> 
  <admin>
    <defaultQuery>solr</defaultQuery>
    <!-- configure a healthcheck file for servers behind a loadbalancer
    <healthcheck type="file">server-enabled</healthcheck>
    -->
  </admin>

</config>
