text: /**
   *    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/scoped_ptr.hpp>
  #include <vector>
  
  #include "mongo/db/global_environment_experiment.h"
  #include "mongo/platform/unordered_set.h"
  #include "mongo/util/concurrency/mutex.h"
  
  namespace mongo {
  
      class Client;
      class StorageEngineLockFile;
  
      class GlobalEnvironmentMongoD : public GlobalEnvironmentExperiment {
      public:
          typedef std::map<std::string, const StorageEngine::Factory*> FactoryMap;
  
          GlobalEnvironmentMongoD();
  
          ~GlobalEnvironmentMongoD();
  
          StorageEngine* getGlobalStorageEngine();
  
          void setGlobalStorageEngine(const std::string& name);
  
          void shutdownGlobalStorageEngineCleanly();
  
          void registerStorageEngine(const std::string& name,
                                     const StorageEngine::Factory* factory);
  
          bool isRegisteredStorageEngine(const std::string& name);
  
          StorageFactoriesIterator* makeStorageFactoriesIterator();
  
          void setKillAllOperations();
  
          void unsetKillAllOperations();
  
          bool getKillAllOperations();
  
          bool killOperation(unsigned int opId);
  
          void killAllUserOperations(const OperationContext* txn);
  
          void registerKillOpListener(KillOpListenerInterface* listener);
  
          OperationContext* newOpCtx();
  
  
      private:
  
          bool _killOperationsAssociatedWithClientAndOpId_inlock(Client* client, unsigned int opId);
  
          bool _globalKill;
  
          // protected by Client::clientsMutex
          std::vector<KillOpListenerInterface*> _killOpListeners;
  
          boost::scoped_ptr<StorageEngineLockFile> _lockFile;
  
          // logically owned here, but never deleted by anyone.
          StorageEngine* _storageEngine;
  
          // All possible storage engines are registered here through MONGO_INIT.
          FactoryMap _storageFactories;
      };
  
      class StorageFactoriesIteratorMongoD : public StorageFactoriesIterator {
      public:
  
          typedef GlobalEnvironmentMongoD::FactoryMap::const_iterator FactoryMapIterator;
          StorageFactoriesIteratorMongoD(const FactoryMapIterator& begin,
                                         const FactoryMapIterator& end);
  
          virtual bool more() const;
          virtual const StorageEngine::Factory* next();
  
      private:
          FactoryMapIterator _curr;
          FactoryMapIterator _end;
      };
  
  }  // namespace mongo
  