javanna commented on code in PR #13735:
URL: https://github.com/apache/lucene/pull/13735#discussion_r1751560638
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lucene/core/src/java/org/apache/lucene/search/CollectorManager.java:
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@@ -46,4 +48,28 @@ public interface CollectorManager<C extends Collector, T> {
* called after collection is finished on all provided collectors.
*/
T reduce(Collection<C> collectors) throws IOException;
+
+ /**
+ * Wrap a provided {@link Collector} with a thin {@code CollectorManager}
wrapper for use with
+ * {@link IndexSearcher#search(Query, CollectorManager)}. The wrapping
{@code CollectorManager}
+ * provides no {@link CollectorManager#reduce(Collection)} implementation,
so the wrapped {@code
+ * Collector} needs to do all relevant work while collecting.
+ *
+ * <p>Note: This is only safe to use when {@code IndexSearcher} is created
with no executor (see:
+ * {@link IndexSearcher#IndexSearcher(IndexReader, Executor)}), or the
provided collector is
+ * threadsafe.
+ */
+ static <C extends Collector> CollectorManager<C, ?> wrap(C in) {
Review Comment:
Naming is the most difficult bit :) Some options: `forSequentialExecution` ,
`createSequentialManager`, `singleThreadedManager` , or something along those
lines.
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