--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Core/Cache/MemoryStringCache.h	Mon Nov 04 15:18:38 2019 +0100
@@ -0,0 +1,73 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * 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 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/>.
+ **/
+
+
+#pragma once
+
+#include "MemoryObjectCache.h"
+
+namespace Orthanc
+{
+  /**
+   * Facade object around "MemoryObjectCache" that caches a dictionary
+   * of strings, using the "fetch/add" paradigm of memcached.
+   **/
+  class MemoryStringCache : public boost::noncopyable
+  {
+  private:
+    class StringValue;
+
+    MemoryObjectCache  cache_;
+
+  public:
+    size_t GetMaximumSize()
+    {
+      return cache_.GetMaximumSize();
+    }
+    
+    void SetMaximumSize(size_t size)
+    {
+      cache_.SetMaximumSize(size);
+    }
+
+    void Add(const std::string& key,
+             const std::string& value);
+    
+    void Invalidate(const std::string& key)
+    {
+      cache_.Invalidate(key);
+    }
+
+    bool Fetch(std::string& value,
+               const std::string& key);
+  };
+}