Mercurial > hg > orthanc-stone
diff Framework/Messages/LockingEmitter.h @ 843:67f9c27214c5
Removed extra logging + doc + added GuiAdapter and LockingEmitter
author | Benjamin Golinvaux <bgo@osimis.io> |
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date | Fri, 14 Jun 2019 12:14:16 +0200 |
parents | |
children | 6d15261f9c99 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Messages/LockingEmitter.h Fri Jun 14 12:14:16 2019 +0200 @@ -0,0 +1,106 @@ +/** + * 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 "IMessageEmitter.h" +#include "IObservable.h" + +#include <boost/thread.hpp> + +namespace OrthancStone +{ + /** + * This class is used when using the ThreadedOracle : since messages + * can be sent from multiple Oracle threads, this IMessageEmitter + * implementation serializes the callbacks. + * + * The internal mutex used in Oracle messaging can also be used to + * protect the application data. Thus, this class can be used as a single + * application-wide mutex. + */ + class LockingEmitter : public IMessageEmitter + { + private: + boost::shared_mutex mutex_; + MessageBroker broker_; + IObservable oracleObservable_; + + public: + LockingEmitter() : + oracleObservable_(broker_) + { + } + + virtual void EmitMessage(const IObserver& observer, + const IMessage& message) ORTHANC_OVERRIDE + { + try + { + boost::unique_lock<boost::shared_mutex> lock(mutex_); + oracleObservable_.EmitMessage(observer, message); + } + catch (Orthanc::OrthancException& e) + { + LOG(ERROR) << "Exception while emitting a message: " << e.What(); + } + } + + + class ReaderLock : public boost::noncopyable + { + private: + LockingEmitter& that_; + boost::shared_lock<boost::shared_mutex> lock_; + + public: + ReaderLock(LockingEmitter& that) : + that_(that), + lock_(that.mutex_) + { + } + }; + + + class WriterLock : public boost::noncopyable + { + private: + LockingEmitter& that_; + boost::unique_lock<boost::shared_mutex> lock_; + + public: + WriterLock(LockingEmitter& that) : + that_(that), + lock_(that.mutex_) + { + } + + MessageBroker& GetBroker() + { + return that_.broker_; + } + + IObservable& GetOracleObservable() + { + return that_.oracleObservable_; + } + }; + }; +}