Mercurial > hg > orthanc-client
diff CppClient/ThreadedCommandProcessor.cpp @ 5:798076adf9e9
rename
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 02 Jun 2015 10:11:34 +0200 |
parents | OrthancCppClient/ThreadedCommandProcessor.cpp@d5027f9f676a |
children | c584c25a74fd |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CppClient/ThreadedCommandProcessor.cpp Tue Jun 02 10:11:34 2015 +0200 @@ -0,0 +1,210 @@ +/** + * Orthanc - A Lightweight, RESTful DICOM Store + * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * In addition, as a special exception, the copyright holders of this + * program give permission to link the code of its release with the + * OpenSSL project's "OpenSSL" library (or with modified versions of it + * that use the same license as the "OpenSSL" library), and distribute + * the linked executables. You must obey the GNU General Public License + * in all respects for all of the code used other than "OpenSSL". 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 here. + * + * 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "ThreadedCommandProcessor.h" + +#include "../Orthanc/Core/OrthancException.h" + +namespace Orthanc +{ + static const int32_t TIMEOUT = 10; + + + void ThreadedCommandProcessor::Processor(ThreadedCommandProcessor* that) + { + while (!that->done_) + { + std::auto_ptr<IDynamicObject> command(that->queue_.Dequeue(TIMEOUT)); + + if (command.get() != NULL) + { + bool success = false; + + try + { + if (that->success_) + { + // No command has failed so far + + if (that->cancel_) + { + // The commands have been canceled. Skip the execution + // of this command, yet mark it as succeeded. + success = true; + } + else + { + success = dynamic_cast<ICommand&>(*command).Execute(); + } + } + else + { + // A command has already failed. Skip the execution of this command. + } + } + catch (OrthancException) + { + } + + { + boost::mutex::scoped_lock lock(that->mutex_); + assert(that->remainingCommands_ > 0); + that->remainingCommands_--; + + if (!success) + { + if (!that->cancel_ && that->listener_ && that->success_) + { + // This is the first command that fails + that->listener_->SignalFailure(); + } + + that->success_ = false; + } + else + { + if (!that->cancel_ && that->listener_) + { + if (that->remainingCommands_ == 0) + { + that->listener_->SignalSuccess(that->totalCommands_); + } + else + { + that->listener_->SignalProgress(that->totalCommands_ - that->remainingCommands_, + that->totalCommands_); + } + } + } + + that->processedCommand_.notify_all(); + } + } + } + } + + + ThreadedCommandProcessor::ThreadedCommandProcessor(unsigned int numThreads) + { + if (numThreads < 1) + { + throw OrthancException(ErrorCode_ParameterOutOfRange); + } + + listener_ = NULL; + success_ = true; + done_ = false; + cancel_ = false; + threads_.resize(numThreads); + remainingCommands_ = 0; + totalCommands_ = 0; + + for (unsigned int i = 0; i < numThreads; i++) + { + threads_[i] = new boost::thread(Processor, this); + } + } + + + ThreadedCommandProcessor::~ThreadedCommandProcessor() + { + done_ = true; + + for (unsigned int i = 0; i < threads_.size(); i++) + { + boost::thread* t = threads_[i]; + + if (t != NULL) + { + if (t->joinable()) + { + t->join(); + } + + delete t; + } + } + } + + + void ThreadedCommandProcessor::Post(ICommand* command) + { + if (command == NULL) + { + throw OrthancException(ErrorCode_ParameterOutOfRange); + } + + boost::mutex::scoped_lock lock(mutex_); + queue_.Enqueue(command); + remainingCommands_++; + totalCommands_++; + } + + + bool ThreadedCommandProcessor::Join() + { + boost::mutex::scoped_lock lock(mutex_); + + while (remainingCommands_ != 0) + { + processedCommand_.wait(lock); + } + + if (cancel_ && listener_) + { + listener_->SignalCancel(); + } + + // Reset the sequence counters for subsequent commands + bool hasSucceeded = success_; + success_ = true; + totalCommands_ = 0; + cancel_ = false; + + return hasSucceeded; + } + + + void ThreadedCommandProcessor::Cancel() + { + boost::mutex::scoped_lock lock(mutex_); + + cancel_ = true; + } + + + void ThreadedCommandProcessor::SetListener(IListener& listener) + { + boost::mutex::scoped_lock lock(mutex_); + listener_ = &listener; + } +}