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/**
* 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"
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
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