Move projects back into subfolder.

[stg.git] / projects / stargazer / plugin_runner.cpp

diff --git a/projects/stargazer/plugin_runner.cpp b/projects/stargazer/plugin_runner.cpp
new file mode 100644 (file)
index 0000000..8938950
--- /dev/null
+++ b/projects/stargazer/plugin_runner.cpp
@@ -0,0 +1,155 @@
+/*
+ *    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 2 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 General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#include "plugin_runner.h"
+
+#include "stg/common.h"
+
+#include <dlfcn.h>
+#include <unistd.h>
+
+using STG::PluginRunner;
+using STG::Plugin;
+
+//-----------------------------------------------------------------------------
+PluginRunner::PluginRunner(const std::string& fileName,
+                           const std::string& name,
+                           const ModuleSettings& ms,
+                           Admins& admins,
+                           Tariffs& tariffs,
+                           Users& users,
+                           Services& services,
+                           Corporations& corporations,
+                           TraffCounter& traffcounter,
+                           Store& store,
+                           const Settings& settings)
+    : pluginFileName(fileName),
+      pluginName(name),
+      libHandle(NULL),
+      m_plugin(load(ms, admins, tariffs, users, services, corporations,
+                    traffcounter, store, settings))
+{
+}
+//-----------------------------------------------------------------------------
+PluginRunner::~PluginRunner()
+{
+    delete &m_plugin;
+    if (dlclose(libHandle))
+    {
+        errorStr = "Failed to unload plugin '" + pluginFileName + "': " + dlerror();
+        printfd(__FILE__, "PluginRunner::Unload() - %s", errorStr.c_str());
+    }
+}
+//-----------------------------------------------------------------------------
+int PluginRunner::Start()
+{
+    int res = m_plugin.Start();
+    errorStr = m_plugin.GetStrError();
+    return res;
+}
+//-----------------------------------------------------------------------------
+int PluginRunner::Stop()
+{
+    int res = m_plugin.Stop();
+    errorStr = m_plugin.GetStrError();
+    return res;
+}
+//-----------------------------------------------------------------------------
+int PluginRunner::Reload(const ModuleSettings& ms)
+{
+    int res = m_plugin.Reload(ms);
+    errorStr = m_plugin.GetStrError();
+    return res;
+}
+//-----------------------------------------------------------------------------
+Plugin & PluginRunner::load(const ModuleSettings& ms,
+                            Admins& admins,
+                            Tariffs& tariffs,
+                            Users& users,
+                            Services& services,
+                            Corporations& corporations,
+                            TraffCounter& traffcounter,
+                            Store& store,
+                            const Settings& settings)
+{
+    if (pluginFileName.empty())
+    {
+        const std::string msg = "Empty plugin file name.";
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    if (access(pluginFileName.c_str(), R_OK))
+    {
+        const std::string msg = "Plugin file '" + pluginFileName + "' is missing or inaccessible.";
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    libHandle = dlopen(pluginFileName.c_str(), RTLD_NOW);
+
+    if (!libHandle)
+    {
+        std::string msg = "Error loading plugin '" + pluginFileName + "'";
+        const char* error = dlerror();
+        if (error)
+            msg = msg + ": '" + error + "'";
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    using Getter = Plugin* (*)();
+    auto GetPlugin = reinterpret_cast<Getter>(dlsym(libHandle, "GetPlugin"));
+    if (!GetPlugin)
+    {
+        const std::string msg = "Plugin '" + pluginFileName + "' does not have GetPlugin() function. ";
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    Plugin* plugin = GetPlugin();
+
+    if (!plugin)
+    {
+        const std::string msg = "Failed to create an instance of plugin '" + pluginFileName + "'.";
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    plugin->SetSettings(ms);
+    plugin->SetTariffs(&tariffs);
+    plugin->SetAdmins(&admins);
+    plugin->SetUsers(&users);
+    plugin->SetServices(&services);
+    plugin->SetCorporations(&corporations);
+    plugin->SetTraffcounter(&traffcounter);
+    plugin->SetStore(&store);
+    plugin->SetStgSettings(&settings);
+
+    if (plugin->ParseSettings())
+    {
+        const std::string msg = "Plugin '" + pluginFileName + "' is unable to parse settings. " + plugin->GetStrError();
+        printfd(__FILE__, "PluginRunner::load() - %s\n", msg.c_str());
+        throw Error(msg);
+    }
+
+    return *plugin;
+}