Package org.apache.solr.search.stats

Class ExactStatsCache

java.lang.Object

org.apache.solr.search.stats.StatsCache

org.apache.solr.search.stats.ExactStatsCache

All Implemented Interfaces:

PluginInfoInitialized

Direct Known Subclasses:

ExactSharedStatsCache, LRUStatsCache

public class ExactStatsCache
extends StatsCache

This class implements exact caching of statistics. It requires an additional round-trip to parse query at shard servers, and return term statistics for query terms (and collection statistics for term fields).

Global statistics are cached in the current request's context and discarded once the processing of the current request is complete. There's no support for longer-term caching, and each request needs to build the global statistics from scratch, even for repeating queries.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	ExactStatsCache.ExactStatsSource

Nested classes/interfaces inherited from class org.apache.solr.search.stats.StatsCache

StatsCache.StatsCacheMetrics

Field Summary

Fields inherited from class org.apache.solr.search.stats.StatsCache

COL_STATS_KEY, FIELDS_KEY, pluginInfo, statsCacheMetrics, TERM_STATS_KEY, TERMS_KEY

Constructor Summary

Constructors

Constructor	Description
ExactStatsCache()

Method Summary

Modifier and Type	Method	Description
protected void	addToGlobalColStats(SolrQueryRequest req, Map.Entry<String,CollectionStats> e)
protected void	addToGlobalTermStats(SolrQueryRequest req, Map.Entry<String,TermStats> e)
protected void	addToPerShardColStats(SolrQueryRequest req, String shard, Map<String,CollectionStats> colStats)
protected void	addToPerShardTermStats(SolrQueryRequest req, String shard, String termStatsString)
protected StatsSource	doGet(SolrQueryRequest req)
protected void	doMergeToGlobalStats(SolrQueryRequest req, List<ShardResponse> responses)
protected void	doReceiveGlobalStats(SolrQueryRequest req)
protected ShardRequest	doRetrieveStatsRequest(ResponseBuilder rb)
protected void	doReturnLocalStats(ResponseBuilder rb, SolrIndexSearcher searcher)
protected void	doSendGlobalStats(ResponseBuilder rb, ShardRequest outgoing)
protected Map<String,CollectionStats>	getPerShardColStats(ResponseBuilder rb, String shard)
protected TermStats	getPerShardTermStats(SolrQueryRequest req, String t, String shard)
protected void	printStats(SolrQueryRequest req)

Methods inherited from class org.apache.solr.search.stats.StatsCache

approxCheckMissingStats, clear, get, getCacheMetrics, init, mergeToGlobalStats, receiveGlobalStats, retrieveStatsRequest, returnLocalStats, sendGlobalStats

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExactStatsCache

public ExactStatsCache()

Method Detail

doGet

protected StatsSource doGet(SolrQueryRequest req)

Specified by:

doGet in class StatsCache

doRetrieveStatsRequest

protected ShardRequest doRetrieveStatsRequest(ResponseBuilder rb)

Specified by:

doRetrieveStatsRequest in class StatsCache

doMergeToGlobalStats

protected void doMergeToGlobalStats(SolrQueryRequest req,
                                    List<ShardResponse> responses)

Specified by:

doMergeToGlobalStats in class StatsCache

addToPerShardColStats

protected void addToPerShardColStats(SolrQueryRequest req,
                                     String shard,
                                     Map<String,CollectionStats> colStats)

printStats

protected void printStats(SolrQueryRequest req)

addToPerShardTermStats

protected void addToPerShardTermStats(SolrQueryRequest req,
                                      String shard,
                                      String termStatsString)

doReturnLocalStats

protected void doReturnLocalStats(ResponseBuilder rb,
                                  SolrIndexSearcher searcher)

Specified by:

doReturnLocalStats in class StatsCache

doSendGlobalStats

protected void doSendGlobalStats(ResponseBuilder rb,
                                 ShardRequest outgoing)

Specified by:

doSendGlobalStats in class StatsCache

getPerShardColStats

protected Map<String,CollectionStats> getPerShardColStats(ResponseBuilder rb,
                                                                String shard)

getPerShardTermStats

protected TermStats getPerShardTermStats(SolrQueryRequest req,
                                         String t,
                                         String shard)

doReceiveGlobalStats

protected void doReceiveGlobalStats(SolrQueryRequest req)

Specified by:

doReceiveGlobalStats in class StatsCache

addToGlobalColStats

protected void addToGlobalColStats(SolrQueryRequest req,
                                   Map.Entry<String,CollectionStats> e)

addToGlobalTermStats

protected void addToGlobalTermStats(SolrQueryRequest req,
                                    Map.Entry<String,TermStats> e)