////  EntityServer.h//  assignment-client/src/entities////  Created by Brad Hefta-Gaub on 4/29/14//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #ifndef hifi_EntityServer_h#define hifi_EntityServer_h #include "../octree/OctreeServer.h" #include <QtCore/QSharedPointer> #include <memory> #include <EntityItem.h>#include <EntityTree.h>#include <SimpleEntitySimulation.h> #include "EntityServerConsts.h" /// Handles assignments of type EntityServer - sending entities to various clients. struct ViewerSendingStats {    quint64 lastSent;    quint64 lastEdited;}; class EntityServer : public OctreeServer, public NewlyCreatedEntityHook {    Q_OBJECTpublic:    EntityServer(ReceivedMessage& message);    ~EntityServer();     // Subclasses must implement these methods    virtual std::unique_ptr<OctreeQueryNode> createOctreeQueryNode() override;    virtual char getMyNodeType() const override { return NodeType::EntityServer; }    virtual PacketType getMyQueryMessageType() const override { return PacketType::EntityQuery; }    virtual const char* getMyServerName() const override { return MODEL_SERVER_NAME; }    virtual const char* getMyLoggingServerTargetName() const override { return MODEL_SERVER_LOGGING_TARGET_NAME; }    virtual const char* getMyDefaultPersistFilename() const override { return LOCAL_MODELS_PERSIST_FILE; }    virtual PacketType getMyEditNackType() const override { return PacketType::EntityEditNack; }    virtual QString getMyDomainSettingsKey() const override { return QString("entity_server_settings"); }     // subclass may implement these method    virtual void beforeRun() override;    virtual bool hasSpecialPacketsToSend(const SharedNodePointer& node) override;    virtual int sendSpecialPackets(const SharedNodePointer& node, OctreeQueryNode* queryNode, int& packetsSent) override;     virtual void entityCreated(const EntityItem& newEntity, const SharedNodePointer& senderNode) override;    virtual void readAdditionalConfiguration(const QJsonObject& settingsSectionObject) override;    virtual QString serverSubclassStats() override;     virtual void trackSend(const QUuid& dataID, quint64 dataLastEdited, const QUuid& sessionID) override;    virtual void trackViewerGone(const QUuid& sessionID) override;     virtual void aboutToFinish() override; public slots:    virtual void nodeAdded(SharedNodePointer node) override;    virtual void nodeKilled(SharedNodePointer node) override;    void pruneDeletedEntities();    void entityFilterAdded(EntityItemID id, bool success); protected:    virtual OctreePointer createTree() override;    virtual UniqueSendThread newSendThread(const SharedNodePointer& node) override; private slots:    void handleEntityPacket(QSharedPointer<ReceivedMessage> message, SharedNodePointer senderNode);    void domainSettingsRequestFailed(); private:    SimpleEntitySimulationPointer _entitySimulation;    QTimer* _pruneDeletedEntitiesTimer = nullptr;     QReadWriteLock _viewerSendingStatsLock;    QMap<QUuid, QMap<QUuid, ViewerSendingStats>> _viewerSendingStats;}; #endif  // hifi_EntityServer_h