SERVER-55813 Fix quiescing future chain in ReshardingDataReplication.

1 files changed, 71 insertions, 0 deletions

diff --git a/src/mongo/db/s/resharding/resharding_future_util.cpp b/src/mongo/db/s/resharding/resharding_future_util.cpp
new file mode 100644
index 00000000000..165ca068dc2
--- /dev/null
+++ b/src/mongo/db/s/resharding/resharding_future_util.cpp
@@ -0,0 +1,71 @@
+/**
+ *    Copyright (C) 2021-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/s/resharding/resharding_future_util.h"
+
+#include "mongo/util/future_util.h"
+
+namespace mongo::resharding {
+
+std::vector<ExecutorFuture<void>> thenRunAllOn(const std::vector<SharedSemiFuture<void>>& futures,
+                                               ExecutorPtr executor) {
+    std::vector<ExecutorFuture<void>> result;
+    result.reserve(futures.size());
+
+    for (const auto& future : futures) {
+        result.emplace_back(future.thenRunOn(executor));
+    }
+
+    return result;
+}
+
+ExecutorFuture<void> whenAllSucceedOn(const std::vector<SharedSemiFuture<void>>& futures,
+                                      ExecutorPtr executor) {
+    return !futures.empty() ? whenAllSucceed(thenRunAllOn(futures, executor)).thenRunOn(executor)
+                            : ExecutorFuture(executor);
+}
+
+ExecutorFuture<void> cancelWhenAnyErrorThenQuiesce(
+    const std::vector<SharedSemiFuture<void>>& futures,
+    ExecutorPtr executor,
+    CancellationSource cancelSource) {
+    return whenAllSucceedOn(futures, executor)
+        .onError([futures, executor, cancelSource](Status originalError) mutable {
+            cancelSource.cancel();
+
+            return whenAll(thenRunAllOn(futures, executor))
+                .ignoreValue()
+                .thenRunOn(executor)
+                .onCompletion([originalError](auto) { return originalError; });
+        });
+}
+
+}  // namespace mongo::resharding