Github user ajs6f commented on a diff in the pull request:
https://github.com/apache/jena/pull/119#discussion_r48902208
--- Diff:
jena-text/src/main/java/org/apache/jena/query/text/TextQueryPF.java ---
@@ -268,7 +276,25 @@ private QueryIterator concreteSubject(Binding binding,
Node s, Node score, Node
Explain.explain(execCxt.getContext(), "Text query: "+queryString) ;
if ( log.isDebugEnabled())
log.debug("Text query: {} ({})", queryString,limit) ;
- return textIndex.query(property, queryString, limit) ;
+
+ String cacheKey = limit + " " + property + " " + queryString ;
+ Map<String,ListMultimap<String,TextHit>> queryCache =
+ (Map<String,ListMultimap<String,TextHit>>)
execCxt.getContext().get(cacheSymbol);
+ if (queryCache == null) { /* doesn't yet exist, need to create it
*/
+ queryCache = new LinkedHashMap();
+ execCxt.getContext().put(cacheSymbol, queryCache);
+ }
+
+ ListMultimap<String,TextHit> results = queryCache.get(cacheKey) ;
+ if (results == null) { /* cache miss */
--- End diff --
Because you want to cache the result if it isn't already cached, maybe
`queryCache.asMap()::computeIfAbsent` could be useful here? Just a thought,
maybe it's not more clear.
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