FairMQ: Add static plugin mechanism

* Add skeleton for Take/ReleaseControl API
* Add skeleton for control_static builtin plugin

fairmq/plugins/Builtin.h

@@ -0,0 +1,11 @@
+/********************************************************************************
+ *    Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+// List of all builtin plugin headers (the ones which call REGISTER_FAIRMQ_PLUGIN macro)
+
+#include <fairmq/plugins/ControlStatic.h>

fairmq/plugins/ControlStatic.cxx

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+/********************************************************************************
+ *    Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#include "ControlStatic.h"
+
+namespace fair
+{
+namespace mq
+{
+namespace plugins
+{
+
+ControlStatic::ControlStatic(
+    const std::string name,
+    const Plugin::Version version,
+    const std::string maintainer,
+    const std::string homepage,
+    PluginServices* pluginServices)
+: Plugin(name, version, maintainer, homepage, pluginServices)
+{
+    SubscribeToDeviceStateChange(
+        [&](DeviceState newState){
+            LOG(WARN) << newState;
+            switch (newState)
+            {
+                case DeviceState::InitializingDevice:
+                    LOG(WARN) << GetPropertyAsString("custom-example-option");
+                    SetProperty("custom-example-option", std::string{"new value"});
+                break;
+                case DeviceState::Exiting:
+                    LOG(WARN) << GetProperty<std::string>("custom-example-option");
+                    UnsubscribeFromDeviceStateChange();
+                break;
+            }
+        }
+    );
+}
+
+auto ControlStaticPluginProgramOptions() -> Plugin::ProgOptions
+{
+    auto plugin_options = boost::program_options::options_description{"Control Static Plugin"};
+    plugin_options.add_options()
+        ("custom-example-option", boost::program_options::value<std::string>(), "Custom option.");
+    return plugin_options;
+}
+
+} /* namespace plugins */
+} /* namespace mq */
+} /* namespace fair */

fairmq/plugins/ControlStatic.h

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+/********************************************************************************
+ *    Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#ifndef FAIR_MQ_PLUGINS_CONTROLSTATIC
+#define FAIR_MQ_PLUGINS_CONTROLSTATIC
+
+#include <fairmq/Plugin.h>
+#include <string>
+
+namespace fair
+{
+namespace mq
+{
+namespace plugins
+{
+
+class ControlStatic : public Plugin
+{
+    public:
+
+    ControlStatic(
+        const std::string name,
+        const Plugin::Version version,
+        const std::string maintainer,
+        const std::string homepage,
+        PluginServices* pluginServices
+    );
+}; /* class ControlStatic */
+
+auto ControlStaticPluginProgramOptions() -> Plugin::ProgOptions;
+
+REGISTER_FAIRMQ_PLUGIN(
+    ControlStatic,                               // Class name
+    control_static,                              // Plugin name (string, lower case chars only)
+    (Plugin::Version{1,0,0}),                    // Version
+    "FairRootGroup <fairroot@gsi.de>",           // Maintainer
+    "https://github.com/FairRootGroup/FairRoot", // Homepage
+    ControlStaticPluginProgramOptions            // Free function which declares custom program options for the plugin
+                                                 // signature: () -> boost::optional<boost::program_options::options_description>
+)
+
+} /* namespace plugins */
+} /* namespace mq */
+} /* namespace fair */
+
+#endif /* FAIR_MQ_PLUGINS_CONTROLSTATIC */