text: /**
   *    Copyright (C) 2015 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 <map>
  #include <memory>
  
  #include "mongol/bson/oid.h"
  #include "mongol/client/connection_string.h"
  #include "mongol/s/catalog/dist_lock_manager.h"
  #include "mongol/s/catalog/legacy/distlock.h"
  #include "mongol/s/catalog/legacy/legacy_dist_lock_pinger.h"
  #include "mongol/stdx/memory.h"
  #include "mongol/stdx/thread.h"
  
  namespace mongol {
  
  class DistributedLock;
  
  class LegacyDistLockManager : public DistLockManager {
  public:
      explicit LegacyDistLockManager(ConnectionString configServer);
  
      virtual ~LegacyDistLockManager() = default;
  
      virtual void startUp() override;
      virtual void shutDown(OperationContext* txn, bool allowNetworking) override;
  
      virtual StatusWith<DistLockManager::ScopedDistLock> lock(
          OperationContext* txn,
          StringData name,
          StringData whyMessage,
          stdx::chrono::milliseconds waitFor,
          stdx::chrono::milliseconds lockTryInterval) override;
  
      // For testing only.
      void enablePinger(bool enable);
  
  protected:
      virtual void unlock(OperationContext* txn,
                          const DistLockHandle& lockHandle) BOOST_NOEXCEPT override;
  
      virtual Status checkStatus(OperationContext* txn, const DistLockHandle& lockHandle) override;
  
  private:
      const ConnectionString _configServer;
  
      stdx::mutex _mutex;
      stdx::condition_variable _noLocksCV;
      std::map<DistLockHandle, std::unique_ptr<DistributedLock>> _lockMap;
  
      std::unique_ptr<LegacyDistLockPinger> _pinger;
  
      bool _isStopped;
  
      // For testing only.
      bool _pingerEnabled;
  };
  }
  