Mercurial > hg > orthanc-stone
view Framework/Messages/IObserver.h @ 973:38409549db43 toa2019082903
Log with addresses + added fingerprint mechanism to avoid calling zombie objects
where:
- a message is sent with a receiver
- the receiver dies
- another receiver with the SAME address is created
- the message reply is executed --> execution on the wrong object!
(since their "identity" is their address. The fix is to identify them with
an UUID stored at creation time)
author | Benjamin Golinvaux <bgo@osimis.io> |
---|---|
date | Thu, 29 Aug 2019 18:07:55 +0200 |
parents | b70e9be013e4 |
children | e75fd08d6c75 |
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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 "MessageBroker.h" #include "IMessage.h" #include <Core/Toolbox.h> namespace OrthancStone { class IObserver : public boost::noncopyable { private: MessageBroker& broker_; // the following is a UUID that is used to disambiguate different observers // that may have the same address std::string fingerprint_; public: IObserver(MessageBroker& broker) : broker_(broker) , fingerprint_(Orthanc::Toolbox::GenerateUuid()) { LOG(TRACE) << "IObserver(" << std::hex << this << std::dec << ")::IObserver : fingerprint_ == " << fingerprint_; broker_.Register(*this); } virtual ~IObserver() { LOG(TRACE) << "IObserver(" << std::hex << this << std::dec << ")::~IObserver : fingerprint_ == " << fingerprint_; broker_.Unregister(*this); } const std::string& GetFingerprint() const { return fingerprint_; } MessageBroker& GetBroker() const { return broker_; } }; }