jpountz commented on a change in pull request #916: LUCENE-8213: Asynchronous 
Caching in LRUQueryCache
URL: https://github.com/apache/lucene-solr/pull/916#discussion_r333892366
 
 

 ##########
 File path: lucene/core/src/java/org/apache/lucene/search/LRUQueryCache.java
 ##########
 @@ -732,6 +734,21 @@ public ScorerSupplier scorerSupplier(LeafReaderContext 
context) throws IOExcepti
 
       if (docIdSet == null) {
         if (policy.shouldCache(in.getQuery())) {
+          boolean cacheSynchronously = executor == null;
+
+          // If asynchronous caching is requested, perform the same and return
+          // the uncached iterator
+          if (cacheSynchronously == false) {
+            boolean asyncCachingSucceeded;
+            asyncCachingSucceeded = cacheAsynchronously(context, cacheHelper);
 
 Review comment:
   merge declaration and assignment?

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