From f59c34004d872dbf536962fe8357deced1931dd8 Mon Sep 17 00:00:00 2001
From: Jon Chambers <jon@signal.org>
Date: Mon, 1 Apr 2024 17:04:09 -0400
Subject: [PATCH] De-idiom-ize a "wait for everything to finish" idiom

---
 .../textsecuregcm/storage/SingleUsePreKeyStore.java            | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/storage/SingleUsePreKeyStore.java b/service/src/main/java/org/whispersystems/textsecuregcm/storage/SingleUsePreKeyStore.java
index 1251b39f2..0aa2af10a 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/storage/SingleUsePreKeyStore.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/storage/SingleUsePreKeyStore.java
@@ -309,8 +309,7 @@ public abstract class SingleUsePreKeyStore<K extends PreKey<?>> {
             ))
             .build())
         .flatMap(deleteItemRequest -> Mono.fromFuture(() -> dynamoDbAsyncClient.deleteItem(deleteItemRequest)), DYNAMO_DB_MAX_BATCH_SIZE)
-        // Idiom: wait for everything to finish, but discard the results
-        .reduce(0, (a, b) -> 0)
+        .then()
         .toFuture()
         .thenRun(Util.NOOP);
   }