--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Core/DicomNetworking/TimeoutDicomConnectionManager.cpp	Fri May 18 17:02:25 2018 +0200
@@ -0,0 +1,136 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * 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 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 "../PrecompiledHeaders.h"
+#include "TimeoutDicomConnectionManager.h"
+
+#include "../OrthancException.h"
+
+namespace Orthanc
+{
+  static boost::posix_time::ptime GetNow()
+  {
+    return boost::posix_time::microsec_clock::universal_time();
+  }
+
+  class TimeoutDicomConnectionManager::Resource : public IDicomConnectionManager::IResource
+  {
+  private:
+    TimeoutDicomConnectionManager&  that_;
+    boost::mutex::scoped_lock        lock_;
+
+  public:
+    Resource(TimeoutDicomConnectionManager& that) : 
+    that_(that),
+    lock_(that.mutex_)
+    {
+    }
+
+    ~Resource()
+    {
+      that_.Touch();
+    }
+
+    DicomUserConnection& GetConnection()
+    {
+      if (that_.connection_.get() == NULL)
+      {
+        throw OrthancException(ErrorCode_InternalError);
+      }
+
+      return *that_.connection_;
+    }
+  };
+
+
+  void TimeoutDicomConnectionManager::Touch()
+  {
+    lastUse_ = GetNow();
+  }
+
+
+  void TimeoutDicomConnectionManager::CheckTimeoutInternal()
+  {
+    if (connection_.get() != NULL &&
+        (GetNow() - lastUse_) >= timeout_)
+    {
+      connection_.reset(NULL);
+    }
+  }
+
+
+  void TimeoutDicomConnectionManager::SetTimeout(unsigned int timeout)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    timeout_ = boost::posix_time::milliseconds(timeout);
+    CheckTimeoutInternal();
+  }
+
+
+  unsigned int TimeoutDicomConnectionManager::GetTimeout()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+    return timeout_.total_milliseconds();
+  }
+
+
+  void TimeoutDicomConnectionManager::Close()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+    connection_.reset(NULL);
+  }
+
+
+  void TimeoutDicomConnectionManager::CheckTimeout()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+    CheckTimeoutInternal();
+  }
+
+
+  IDicomConnectionManager::IResource* 
+  TimeoutDicomConnectionManager::AcquireConnection(const std::string& localAet,
+                                                   const RemoteModalityParameters& remote)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    if (connection_.get() == NULL ||
+        !connection_->IsSameAssociation(localAet, remote))
+    {
+      connection_.reset(new DicomUserConnection(localAet, remote));
+    }
+
+    return new Resource(*this);
+  }
+}