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/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 <boost/thread.hpp>
#include "mongo/base/disallow_copying.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/repl/replication_coordinator_external_state.h"
#include "mongo/db/repl/sync_source_feedback.h"
namespace mongo {
namespace repl {
class ReplicationCoordinatorExternalStateImpl : public ReplicationCoordinatorExternalState {
MONGO_DISALLOW_COPYING(ReplicationCoordinatorExternalStateImpl);
public:
ReplicationCoordinatorExternalStateImpl();
virtual ~ReplicationCoordinatorExternalStateImpl();
virtual void startThreads();
virtual void startMasterSlave(OperationContext* txn);
virtual void shutdown();
virtual void initiateOplog(OperationContext* txn);
virtual void forwardSlaveProgress();
virtual OID ensureMe(OperationContext* txn);
virtual bool isSelf(const HostAndPort& host);
virtual StatusWith<BSONObj> loadLocalConfigDocument(OperationContext* txn);
virtual Status storeLocalConfigDocument(OperationContext* txn, const BSONObj& config);
virtual StatusWith<LastVote> loadLocalLastVoteDocument(OperationContext* txn);
virtual Status storeLocalLastVoteDocument(OperationContext* txn, const LastVote& lastVote);
virtual void setGlobalTimestamp(const Timestamp& newTime);
virtual StatusWith<OpTime> loadLastOpTime(OperationContext* txn);
virtual HostAndPort getClientHostAndPort(const OperationContext* txn);
virtual void closeConnections();
virtual void killAllUserOperations(OperationContext* txn);
virtual void clearShardingState();
virtual void signalApplierToChooseNewSyncSource();
virtual OperationContext* createOperationContext(const std::string& threadName);
virtual void dropAllTempCollections(OperationContext* txn);
std::string getNextOpContextThreadName();
private:
// Guards starting threads and setting _startedThreads
boost::mutex _threadMutex;
// True when the threads have been started
bool _startedThreads;
// The SyncSourceFeedback class is responsible for sending replSetUpdatePosition commands
// for forwarding replication progress information upstream when there is chained
// replication.
SyncSourceFeedback _syncSourceFeedback;
// Thread running SyncSourceFeedback::run().
std::unique_ptr<boost::thread> _syncSourceFeedbackThread;
// Thread running runSyncThread().
std::unique_ptr<boost::thread> _applierThread;
// Thread running BackgroundSync::producerThread().
std::unique_ptr<boost::thread> _producerThread;
// Mutex guarding the _nextThreadId value to prevent concurrent incrementing.
boost::mutex _nextThreadIdMutex;
// Number used to uniquely name threads.
long long _nextThreadId;
};
} // namespace repl
} // namespace mongo
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