Mercurial > hg > orthanc-stone
diff Framework/Loaders/LoaderStateMachine.cpp @ 815:df442f1ba0c6
reorganization
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Tue, 28 May 2019 21:59:20 +0200 |
parents | |
children | 47fc7919977d |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Loaders/LoaderStateMachine.cpp Tue May 28 21:59:20 2019 +0200 @@ -0,0 +1,174 @@ +/** + * 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/>. + **/ + + +#include "LoaderStateMachine.h" + +#include <Core/OrthancException.h> + +namespace OrthancStone +{ + void LoaderStateMachine::State::Handle(const OrthancRestApiCommand::SuccessMessage& message) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); + } + + + void LoaderStateMachine::State::Handle(const GetOrthancImageCommand::SuccessMessage& message) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); + } + + + void LoaderStateMachine::State::Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); + } + + + void LoaderStateMachine::Schedule(OracleCommandWithPayload* command) + { + std::auto_ptr<OracleCommandWithPayload> protection(command); + + if (command == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); + } + + if (!command->HasPayload()) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, + "The payload must contain the next state"); + } + + pendingCommands_.push_back(protection.release()); + Step(); + } + + + void LoaderStateMachine::Start() + { + if (active_) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + + active_ = true; + + for (size_t i = 0; i < simultaneousDownloads_; i++) + { + Step(); + } + } + + + void LoaderStateMachine::Step() + { + if (!pendingCommands_.empty() && + activeCommands_ < simultaneousDownloads_) + { + oracle_.Schedule(*this, pendingCommands_.front()); + pendingCommands_.pop_front(); + + activeCommands_++; + } + } + + + void LoaderStateMachine::Clear() + { + for (PendingCommands::iterator it = pendingCommands_.begin(); + it != pendingCommands_.end(); ++it) + { + delete *it; + } + + pendingCommands_.clear(); + } + + + void LoaderStateMachine::HandleExceptionMessage(const OracleCommandExceptionMessage& message) + { + LOG(ERROR) << "Error in the state machine, stopping all processing"; + Clear(); + } + + + template <typename T> + void LoaderStateMachine::HandleSuccessMessage(const T& message) + { + assert(activeCommands_ > 0); + activeCommands_--; + + try + { + dynamic_cast<State&>(message.GetOrigin().GetPayload()).Handle(message); + Step(); + } + catch (Orthanc::OrthancException& e) + { + LOG(ERROR) << "Error in the state machine, stopping all processing: " << e.What(); + Clear(); + } + } + + + LoaderStateMachine::LoaderStateMachine(IOracle& oracle, + IObservable& oracleObservable) : + IObserver(oracleObservable.GetBroker()), + oracle_(oracle), + active_(false), + simultaneousDownloads_(4), + activeCommands_(0) + { + oracleObservable.RegisterObserverCallback( + new Callable<LoaderStateMachine, OrthancRestApiCommand::SuccessMessage> + (*this, &LoaderStateMachine::HandleSuccessMessage)); + + oracleObservable.RegisterObserverCallback( + new Callable<LoaderStateMachine, GetOrthancImageCommand::SuccessMessage> + (*this, &LoaderStateMachine::HandleSuccessMessage)); + + oracleObservable.RegisterObserverCallback( + new Callable<LoaderStateMachine, GetOrthancWebViewerJpegCommand::SuccessMessage> + (*this, &LoaderStateMachine::HandleSuccessMessage)); + + oracleObservable.RegisterObserverCallback( + new Callable<LoaderStateMachine, OracleCommandExceptionMessage> + (*this, &LoaderStateMachine::HandleExceptionMessage)); + } + + + void LoaderStateMachine::SetSimultaneousDownloads(unsigned int count) + { + if (active_) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + else if (count == 0) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); + } + else + { + simultaneousDownloads_ = count; + } + } +}