gf2121 commented on code in PR #12642:
URL: https://github.com/apache/lucene/pull/12642#discussion_r1354116012
##########
lucene/facet/src/test/org/apache/lucene/facet/TestDrillSideways.java:
##########
@@ -316,6 +316,58 @@ public void testBasic() throws Exception {
IOUtils.close(searcher.getIndexReader(), taxoReader, taxoWriter, dir,
taxoDir);
}
+ public void testCollectionTerminated() throws Exception {
+ try (Directory dir = newDirectory();
+ Directory taxoDir = newDirectory();
+ RandomIndexWriter w = new RandomIndexWriter(random(), dir);
+ DirectoryTaxonomyWriter taxoW =
+ new DirectoryTaxonomyWriter(taxoDir,
IndexWriterConfig.OpenMode.CREATE)) {
+ FacetsConfig facetsConfig = new FacetsConfig();
+
+ Document d = new Document();
+ d.add(new FacetField("foo", "bar"));
+ w.addDocument(facetsConfig.build(taxoW, d));
+
+ try (IndexReader r = w.getReader();
+ TaxonomyReader taxoR = new DirectoryTaxonomyReader(taxoW)) {
+ IndexSearcher searcher = new IndexSearcher(r);
+
+ Query baseQuery = new MatchAllDocsQuery();
+ Query dimQ = new TermQuery(new Term("foo", "bar"));
+
+ DrillDownQuery ddq = new DrillDownQuery(facetsConfig, baseQuery);
+ ddq.add("foo", dimQ);
+ DrillSideways drillSideways = new DrillSideways(searcher,
facetsConfig, taxoR);
+
+ CollectorManager<?, ?> cm =
+ new CollectorManager<>() {
+ @Override
+ public Collector newCollector() throws IOException {
+ return new Collector() {
Review Comment:
Thanks @gsmiller for digging!
It is a bit pity that we can not introduce `AssertingIndexSearcher` here as
we need it to ensure `#finish` called on the last `LeafCollector`. And if we
have only one segment, the check could be lost :(
if we can accept the expose of
`AssertingCollector#hasFinishedCollectingPreviousLeaf`, maybe tweak the
asserting search logic like:
```
IndexSearcher searcher = new IndexSearcher(r) {
@Override
protected void search(List<LeafReaderContext> leaves, Weight weight,
Collector collector)
throws IOException {
AssertingCollector assertingCollector =
AssertingCollector.wrap(collector);
super.search(leaves, weight, assertingCollector);
assert assertingCollector.hasFinishedCollectingPreviousLeaf();
}
};
```
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