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_r333900618
##########
File path: lucene/core/src/test/org/apache/lucene/search/TestLRUQueryCache.java
##########
@@ -1691,4 +1954,180 @@ public void testBulkScorerLocking() throws Exception {
t.start();
t.join();
}
+
+ public void testRejectedExecution() throws IOException {
+ ExecutorService service = new TestIndexSearcher.RejectingMockExecutor();
+ Directory dir = newDirectory();
+ final RandomIndexWriter w = new RandomIndexWriter(random(), dir);
+
+ Document doc = new Document();
+ StringField f = new StringField("color", "blue", Store.NO);
+ doc.add(f);
+ w.addDocument(doc);
+ f.setStringValue("red");
+ w.addDocument(doc);
+ f.setStringValue("green");
+ w.addDocument(doc);
+ final DirectoryReader reader = w.getReader();
+
+ final Query red = new TermQuery(new Term("color", "red"));
+
+ IndexSearcher searcher = new IndexSearcher(reader, service);
+
+ final LRUQueryCache queryCache = new LRUQueryCache(2, 100000, context ->
true);
+
+ searcher.setQueryCache(queryCache);
+ searcher.setQueryCachingPolicy(ALWAYS_CACHE);
+
+ // To ensure that failing ExecutorService still allows query to run
+ // successfully
+
+ searcher.search(new ConstantScoreQuery(red), 1);
+ assertEquals(Collections.singletonList(red), queryCache.cachedQueries());
+
+ reader.close();
+ w.close();
+ dir.close();
+ service.shutdown();
+ }
+
+ public void testClosedReaderExecution() throws IOException {
+ CountDownLatch latch = new CountDownLatch(1);
+ ExecutorService service = new BlockedMockExecutor(latch);
+
+ Directory dir = newDirectory();
+ final RandomIndexWriter w = new RandomIndexWriter(random(), dir);
+
+ for (int i = 0; i < 100; i++) {
+ Document doc = new Document();
+ StringField f = new StringField("color", "blue", Store.NO);
+ doc.add(f);
+ w.addDocument(doc);
+ f.setStringValue("red");
+ w.addDocument(doc);
+ f.setStringValue("green");
+ w.addDocument(doc);
+
+ if (i % 10 == 0) {
+ w.commit();
+ }
+ }
+
+ final DirectoryReader reader = w.getReader();
+
+ final Query red = new TermQuery(new Term("color", "red"));
+
+ IndexSearcher searcher = new IndexSearcher(reader, service) {
+ @Override
+ protected LeafSlice[] slices(List<LeafReaderContext> leaves) {
+ ArrayList<LeafSlice> slices = new ArrayList<>();
+ for (LeafReaderContext ctx : leaves) {
+ slices.add(new LeafSlice(Arrays.asList(ctx)));
+ }
+ return slices.toArray(new LeafSlice[0]);
Review comment:
nit: with recent versions of Java I like `slices.toArray(LeafSlice[]::new);`
better
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