# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1402766438 -7200
# Node ID 4066e6f2d134fb214f99643df662b2db9e9c530a
# Parent  29087d728e0a2c009c37fbd54d417f9ea8fcd1f0
PluginsManager

diff -r 29087d728e0a -r 4066e6f2d134 CMakeLists.txt
--- a/CMakeLists.txt	Sat Jun 14 18:50:14 2014 +0200
+++ b/CMakeLists.txt	Sat Jun 14 19:20:38 2014 +0200
@@ -116,6 +116,7 @@
   OrthancCppClient/Patient.cpp
 
   Plugins/Engine/SharedLibrary.cpp
+  Plugins/Engine/PluginsManager.cpp
   )
 
 
diff -r 29087d728e0a -r 4066e6f2d134 Plugins/Engine/PluginsManager.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugins/Engine/PluginsManager.cpp	Sat Jun 14 19:20:38 2014 +0200
@@ -0,0 +1,145 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
+ * 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 "PluginsManager.h"
+
+#include <glog/logging.h>
+#include <cassert>
+#include <memory>
+
+namespace Orthanc
+{
+  static void CallInitialize(SharedLibrary& plugin,
+                             const OrthancPluginContext& context)
+  {
+    typedef int32_t (*Initialize) (const OrthancPluginContext*);
+
+    /**
+     * gcc would complain about "ISO C++ forbids casting between
+     * pointer-to-function and pointer-to-object" without the trick
+     * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
+     * 1) workaround". See the man page of "dlsym()".
+     * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
+     * http://stackoverflow.com/a/14543811/881731
+     **/
+
+    Initialize initialize;
+    *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
+    assert(initialize != NULL);
+
+    int32_t error = initialize(&context);
+
+    if (error != 0)
+    {
+      LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
+                 << " (code " << error << ")";
+      throw OrthancException(ErrorCode_SharedLibrary);
+    }
+  }
+
+
+  static void CallFinalize(SharedLibrary& plugin)
+  {
+    typedef void (*Finalize) ();
+
+    Finalize finalize;
+    *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
+    assert(finalize != NULL);
+
+    finalize();
+  }
+
+
+  static void LogError(const char* str)
+  {
+    LOG(ERROR) << str;
+  }
+
+  static void LogWarning(const char* str)
+  {
+    LOG(WARNING) << str;
+  }
+
+  static void LogInfo(const char* str)
+  {
+    LOG(INFO) << str;
+  }
+
+  static int32_t InvokeService(const char* serviceName,
+                               const void* serviceParameters)
+  {
+    // TODO
+    return 0;
+  }
+
+  PluginsManager::PluginsManager()
+  {
+    context_.orthancVersion = ORTHANC_VERSION;
+    context_.InvokeService = InvokeService;
+    context_.LogError = LogError;
+    context_.LogWarning = LogWarning;
+    context_.LogInfo = LogInfo;
+  }
+
+  PluginsManager::~PluginsManager()
+  {
+    for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); it++)
+    {
+      if (*it != NULL)
+      {
+        CallFinalize(**it);
+        delete *it;
+      }
+    }
+  }
+
+  
+  void PluginsManager::RegisterPlugin(const std::string& path)
+  {
+    std::auto_ptr<SharedLibrary> plugin(new SharedLibrary(path));
+
+    if (!plugin->HasFunction("OrthancPluginInitialize") ||
+        !plugin->HasFunction("OrthancPluginFinalize"))
+    {
+      LOG(ERROR) << "Plugin " << plugin->GetPath()
+                 << " does not declare the proper entry functions";
+      throw OrthancException(ErrorCode_SharedLibrary);
+    }
+
+    LOG(WARNING) << "Registering plugin " << path;
+
+    CallInitialize(*plugin, context_);
+
+    plugins_.push_back(plugin.release());
+  }
+
+}
diff -r 29087d728e0a -r 4066e6f2d134 Plugins/Engine/PluginsManager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugins/Engine/PluginsManager.h	Sat Jun 14 19:20:38 2014 +0200
@@ -0,0 +1,57 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
+ * 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 "SharedLibrary.h"
+#include "../OrthancCPlugin/OrthancCPlugin.h"
+
+#include <list>
+
+namespace Orthanc
+{
+  class PluginsManager : boost::noncopyable
+  {
+  private:
+    typedef std::list<SharedLibrary*>  Plugins;
+
+    OrthancPluginContext  context_;
+    Plugins  plugins_;
+
+  public:
+    PluginsManager();
+
+    ~PluginsManager();
+
+    void RegisterPlugin(const std::string& path);
+  };
+}
diff -r 29087d728e0a -r 4066e6f2d134 Plugins/Engine/SharedLibrary.cpp
--- a/Plugins/Engine/SharedLibrary.cpp	Sat Jun 14 18:50:14 2014 +0200
+++ b/Plugins/Engine/SharedLibrary.cpp	Sat Jun 14 19:20:38 2014 +0200
@@ -46,7 +46,9 @@
 
 namespace Orthanc
 {
-  SharedLibrary::SharedLibrary(const std::string& path) : handle_(NULL)
+  SharedLibrary::SharedLibrary(const std::string& path) : 
+    path_(path),
+    handle_(NULL)
   {
 #if defined(_WIN32)
     handle_ = ::LoadLibraryA(path.c_str());
diff -r 29087d728e0a -r 4066e6f2d134 Plugins/Engine/SharedLibrary.h
--- a/Plugins/Engine/SharedLibrary.h	Sat Jun 14 18:50:14 2014 +0200
+++ b/Plugins/Engine/SharedLibrary.h	Sat Jun 14 19:20:38 2014 +0200
@@ -41,6 +41,7 @@
   class SharedLibrary : boost::noncopyable
   {
   private:
+    std::string path_;
     void *handle_;
 
     void* GetFunctionInternal(const std::string& name);
@@ -50,6 +51,11 @@
 
     ~SharedLibrary();
 
+    const std::string& GetPath() const
+    {
+      return path_;
+    }
+
     bool HasFunction(const std::string& name);
 
     void* GetFunction(const std::string& name);
diff -r 29087d728e0a -r 4066e6f2d134 UnitTestsSources/PluginsTests.cpp
--- a/UnitTestsSources/PluginsTests.cpp	Sat Jun 14 18:50:14 2014 +0200
+++ b/UnitTestsSources/PluginsTests.cpp	Sat Jun 14 19:20:38 2014 +0200
@@ -35,8 +35,7 @@
 
 #include <glog/logging.h>
 
-#include "../Plugins/Engine/SharedLibrary.h"
-#include "../Plugins/OrthancCPlugin/OrthancCPlugin.h"
+#include "../Plugins/Engine/PluginsManager.h"
 
 using namespace Orthanc;
 
@@ -59,72 +58,17 @@
 }
 
 
-
-static void LogError(const char* str)
-{
-  LOG(ERROR) << str;
-}
-
-static void LogWarning(const char* str)
-{
-  LOG(WARNING) << str;
-}
-
-static void LogInfo(const char* str)
-{
-  LOG(INFO) << str;
-}
-
-static int32_t InvokeService(const char* serviceName,
-                             const void* serviceParameters)
-{
-  return 0;
-}
-
-
-
 TEST(SharedLibrary, Development)
 {
+  PluginsManager manager;
+
 #if defined(_WIN32)
 #error Support your platform here
 
 #elif defined(__linux)
-  SharedLibrary l("./libPluginTest.so");
-  ASSERT_TRUE(l.HasFunction("OrthancPluginFinalize"));
-  ASSERT_TRUE(l.HasFunction("OrthancPluginInitialize"));
-
-  OrthancPluginContext context;
-  context.orthancVersion = ORTHANC_VERSION;
-  context.InvokeService = InvokeService;
-  context.LogError = LogError;
-  context.LogWarning = LogWarning;
-  context.LogInfo = LogInfo;
-
-  typedef void (*Finalize) ();
-  typedef int32_t (*Initialize) (const OrthancPluginContext*);
-
-  /**
-   * gcc would complain about "ISO C++ forbids casting between
-   * pointer-to-function and pointer-to-object" without the trick
-   * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
-   * 1) workaround". See the man page of "dlsym()".
-   * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
-   * http://stackoverflow.com/a/14543811/881731
-   **/
-
-  Finalize finalize;
-  *(void **) (&finalize) = l.GetFunction("OrthancPluginFinalize");
-  assert(finalize != NULL);
-
-  Initialize initialize;
-  *(void **) (&initialize) = l.GetFunction("OrthancPluginInitialize");
-  assert(initialize != NULL);
-
-  initialize(&context);
-  finalize();
+  manager.RegisterPlugin("./libPluginTest.so");
 
 #else
 #error Support your platform here
-#endif
-
+#endif  
 }