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/**
* Copyright (C) 2018-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/command_can_run_here.h"
#include "mongo/client/read_preference.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/util/assert_util.h"
namespace mongo {
bool commandCanRunHere(OperationContext* opCtx,
const std::string& dbname,
const Command* command,
bool inMultiDocumentTransaction) {
auto replCoord = repl::ReplicationCoordinator::get(opCtx);
if (replCoord->canAcceptWritesForDatabase_UNSAFE(opCtx, dbname))
return true; // primary: always ok
if (!opCtx->writesAreReplicated())
return true; // standalone: always ok
if (inMultiDocumentTransaction)
return false; // Transactions are not allowed on secondaries.
switch (command->secondaryAllowed(opCtx->getServiceContext())) {
case Command::AllowedOnSecondary::kAlways:
return true;
case Command::AllowedOnSecondary::kNever:
return false;
case Command::AllowedOnSecondary::kOptIn:
// Did the user opt in?
return ReadPreferenceSetting::get(opCtx).canRunOnSecondary();
}
MONGO_UNREACHABLE;
}
} // namespace mongo
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