--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Messages/MessageForwarder.h	Tue Sep 18 15:23:21 2018 +0200
@@ -0,0 +1,53 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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 "ICallable.h"
+#include "IObservable.h"
+#include "IObserver.h"
+
+#include <boost/noncopyable.hpp>
+
+namespace OrthancStone {
+
+
+  template<typename TMessage>
+  class MessageForwarder : public IObserver, public Callable<MessageForwarder<TMessage>, TMessage>
+  {
+    IObservable& observable_;
+  public:
+    MessageForwarder(MessageBroker& broker,
+                     IObservable& observable // the object that will emit the forwarded message
+                     )
+      : IObserver(broker),
+        Callable<MessageForwarder<TMessage>, TMessage>(*this, &MessageForwarder::ForwardMessage),
+        observable_(observable)
+    {
+    }
+
+  protected:
+    void ForwardMessage(const TMessage& message)
+    {
+      observable_.EmitMessage(message);
+    }
+  };
+}