--- a/Framework/Loaders/DicomStructureSetLoader2.h	Sat Sep 14 17:27:41 2019 +0200
+++ b/Framework/Loaders/DicomStructureSetLoader2.h	Fri Sep 20 11:58:00 2019 +0200
@@ -0,0 +1,80 @@
+/**
+ * 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 "../Toolbox/DicomStructureSet2.h"
+#include "../Messages/IMessage.h"
+#include "../Messages/IObserver.h"
+#include "../Messages/IObservable.h"
+#include "../Oracle/OrthancRestApiCommand.h"
+
+#include <boost/noncopyable.hpp>
+
+namespace OrthancStone
+{
+  class IOracle;
+  class IObservable;
+  class OrthancRestApiCommand;
+  class OracleCommandExceptionMessage;
+
+  class DicomStructureSetLoader2 : public IObserver, public IObservable
+  {
+  public:
+    ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, StructuresReady, DicomStructureSetLoader2);
+
+    /**
+    Warning: the structureSet, oracle and oracleObservable objects must live
+    at least as long as this object (TODO: shared_ptr?)
+    */
+    DicomStructureSetLoader2(DicomStructureSet2& structureSet, IOracle& oracle, IObservable& oracleObservable);
+
+    ~DicomStructureSetLoader2();
+
+    void LoadInstance(const std::string& instanceId);
+
+    /** Internal use */
+    void LoadInstanceFromString(const std::string& body);
+
+    void SetStructuresReady();
+    bool AreStructuresReady() const;
+  
+  private:
+    /**
+    Called back by the oracle when data is ready!
+    */
+    void HandleSuccessMessage(const OrthancRestApiCommand::SuccessMessage& message);
+
+    /**
+    Called back by the oracle when shit hits the fan
+    */
+    void HandleExceptionMessage(const OracleCommandExceptionMessage& message);
+
+    /**
+    The structure set that will be (cleared and) filled with data from the 
+    loader
+    */
+    DicomStructureSet2& structureSet_;
+
+    IOracle&            oracle_;
+    IObservable&        oracleObservable_;
+    bool                structuresReady_;
+  };
+}