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diff --git a/src/mongo/db/service_context_d.h b/src/mongo/db/service_context_d.h
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+++ b/src/mongo/db/service_context_d.h
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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/scoped_ptr.hpp>
+#include <vector>
+
+#include "mongo/db/service_context.h"
+#include "mongo/platform/unordered_set.h"
+#include "mongo/util/concurrency/mutex.h"
+
+namespace mongo {
+
+    class Client;
+    class StorageEngineLockFile;
+
+    class ServiceContextMongoD : public ServiceContext {
+    public:
+        typedef std::map<std::string, const StorageEngine::Factory*> FactoryMap;
+
+        ServiceContextMongoD();
+
+        ~ServiceContextMongoD();
+
+        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();
+
+        void setOpObserver(std::unique_ptr<OpObserver> opObserver);
+
+        OpObserver* getOpObserver();
+
+    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;
+
+        // logically owned here.
+        std::unique_ptr<OpObserver> _opObserver;
+
+        // All possible storage engines are registered here through MONGO_INIT.
+        FactoryMap _storageFactories;
+    };
+
+    class StorageFactoriesIteratorMongoD : public StorageFactoriesIterator {
+    public:
+
+        typedef ServiceContextMongoD::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