Mercurial > hg > orthanc-stone
view Framework/Loaders/LoaderStateMachine.h @ 879:12b591d5d63c am-dev
some Qt integration (wip)
author | Alain Mazy <alain@mazy.be> |
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date | Fri, 05 Jul 2019 14:52:43 +0200 |
parents | df442f1ba0c6 |
children | 38409549db43 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2019 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * 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/>. **/ #pragma once #include "../Messages/IObservable.h" #include "../Messages/IObserver.h" #include "../Oracle/GetOrthancImageCommand.h" #include "../Oracle/GetOrthancWebViewerJpegCommand.h" #include "../Oracle/IOracle.h" #include "../Oracle/OracleCommandExceptionMessage.h" #include "../Oracle/OrthancRestApiCommand.h" #include <Core/IDynamicObject.h> #include <list> namespace OrthancStone { /** This class is supplied with Oracle commands and will schedule up to simultaneousDownloads_ of them at the same time, then will schedule the rest once slots become available. It is used, a.o., by the OrtancMultiframeVolumeLoader class. */ class LoaderStateMachine : public IObserver { protected: class State : public Orthanc::IDynamicObject { private: LoaderStateMachine& that_; public: State(LoaderStateMachine& that) : that_(that) { } State(const State& currentState) : that_(currentState.that_) { } void Schedule(OracleCommandWithPayload* command) const { that_.Schedule(command); } template <typename T> T& GetLoader() const { return dynamic_cast<T&>(that_); } virtual void Handle(const OrthancRestApiCommand::SuccessMessage& message); virtual void Handle(const GetOrthancImageCommand::SuccessMessage& message); virtual void Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message); }; void Schedule(OracleCommandWithPayload* command); void Start(); private: void Step(); void Clear(); void HandleExceptionMessage(const OracleCommandExceptionMessage& message); template <typename T> void HandleSuccessMessage(const T& message); typedef std::list<IOracleCommand*> PendingCommands; IOracle& oracle_; bool active_; unsigned int simultaneousDownloads_; PendingCommands pendingCommands_; unsigned int activeCommands_; public: LoaderStateMachine(IOracle& oracle, IObservable& oracleObservable); virtual ~LoaderStateMachine() { Clear(); } bool IsActive() const { return active_; } void SetSimultaneousDownloads(unsigned int count); }; }