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/**
* Copyright (C) 2020-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.
*/
#pragma once
#include "mongo/base/string_data.h"
#include "mongo/db/repl/tenant_migration_donor_access_blocker.h"
#include "mongo/util/string_map.h"
namespace mongo {
class TenantMigrationAccessBlockerRegistry {
TenantMigrationAccessBlockerRegistry(const TenantMigrationAccessBlockerRegistry&) = delete;
TenantMigrationAccessBlockerRegistry& operator=(const TenantMigrationAccessBlockerRegistry&) =
delete;
public:
TenantMigrationAccessBlockerRegistry() = default;
static const ServiceContext::Decoration<TenantMigrationAccessBlockerRegistry> get;
/**
* Adds an entry for (tenantId, mtab). Throws ConflictingOperationInProgress if an entry for
* tenantId already exists.
*/
void add(StringData tenantId, std::shared_ptr<TenantMigrationAccessBlocker> mtab);
/**
* Invariants that an entry for tenantId exists, and then removes the entry for (tenantId, mtab)
*/
void remove(StringData tenantId);
/**
* Iterates through each of the TenantMigrationAccessBlockers and
* returns the first TenantMigrationAccessBlocker it finds whose tenantId is a prefix for
* dbName.
*/
std::shared_ptr<TenantMigrationAccessBlocker> getTenantMigrationAccessBlockerForDbName(
StringData dbName);
/**
* Searches through TenantMigrationAccessBlockers and
* returns the TenantMigrationAccessBlocker that matches tenantId.
*/
std::shared_ptr<TenantMigrationAccessBlocker> getTenantMigrationAccessBlockerForTenantId(
StringData tenantId);
/**
* Shuts down each of the TenantMigrationAccessBlockers and releases the shared_ptrs to the
* TenantMigrationAccessBlockers from the map.
*/
void shutDown();
/**
* Iterates through each of the TenantMigrationAccessBlockers stored by the mapping
* and appends the server status of each blocker to the BSONObjBuilder.
*/
void appendInfoForServerStatus(BSONObjBuilder* builder) const;
/**
* Notifies all the TenantMigrationAccessBlockers that the given opTime has been majority
* committed.
*
* This is called while holding a very hot mutex (the ReplicationCoordinator mutex). Therefore
* it should avoid doing any work that can be done later, and avoid calling back into any
* replication functions that take this mutex (which would cause self-deadlock).
*/
void onMajorityCommitPointUpdate(repl::OpTime opTime);
private:
using TenantMigrationAccessBlockersMap =
StringMap<std::shared_ptr<TenantMigrationAccessBlocker>>;
mutable Mutex _mutex = MONGO_MAKE_LATCH("TenantMigrationAccessBlockerRegistry::_mutex");
TenantMigrationAccessBlockersMap _tenantMigrationAccessBlockers;
};
} // namespace mongo
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