Issue #15 CCoreFacade owns an instance of CDataLinkDBus

src/blackcore/application.cpp

@@ -1577,6 +1577,11 @@ namespace BlackCore
     // Contexts
     // ---------------------------------------------------------------------------------
 
+    SharedState::CDataLinkDBus *CApplication::getDataLinkDBus()
+    {
+        return getCoreFacade()->getDataLinkDBus();
+    }
+
     bool CApplication::supportsContexts(bool ignoreShutdownTest) const
     {
         if (!ignoreShutdownTest && m_shutdown) { return false; }

src/blackcore/application.h

@@ -52,6 +52,10 @@ namespace BlackMisc
 {
     class CFileLogger;
     class CLogCategoryList;
+    namespace SharedState
+    {
+        class CDataLinkDBus;
+    }
 }
 
 namespace BlackCore
@@ -346,6 +350,9 @@ namespace BlackCore
 
         // ----------------------- contexts ----------------------------------------
 
+        //! Transport mechanism for sharing state between applications
+        BlackMisc::SharedState::CDataLinkDBus *getDataLinkDBus();
+
         //! \name Context / core facade related
         //! @{
 

src/blackcore/corefacade.cpp

@@ -6,6 +6,7 @@
  * or distributed except according to the terms contained in the LICENSE file.
  */
 
+#include "blackcore/corefacade.h"
 #include "blackcore/context/contextapplication.h"
 #include "blackcore/context/contextapplicationproxy.h"
 #include "blackcore/context/contextapplicationimpl.h"
@@ -16,9 +17,9 @@
 #include "blackcore/context/contextownaircraft.h"
 #include "blackcore/context/contextownaircraftimpl.h"
 #include "blackcore/context/contextsimulator.h"
+#include "blackmisc/sharedstate/datalinkdbus.h"
 #include "blackcore/context/contextsimulatorimpl.h"
 #include "blackcore/data/launchersetup.h"
-#include "blackcore/corefacade.h"
 #include "blackcore/corefacadeconfig.h"
 #include "blackcore/registermetadata.h"
 #include "blackcore/airspacemonitor.h"
@@ -105,6 +106,23 @@ namespace BlackCore
         }
         times.insert("DBus", time.restart());
 
+        // shared state infrastructure
+        m_dataLinkDBus = new SharedState::CDataLinkDBus(this);
+        switch (m_config.getModeApplication())
+        {
+        case CCoreFacadeConfig::Local:
+            m_dataLinkDBus->initializeLocal(nullptr);
+            break;
+        case CCoreFacadeConfig::LocalInDBusServer:
+            m_dataLinkDBus->initializeLocal(m_dbusServer);
+            break;
+        case CCoreFacadeConfig::Remote:
+            m_dataLinkDBus->initializeRemote(m_dbusConnection, CDBusServer::coreServiceName(m_dbusConnection));
+            break;
+        default:
+            qFatal("Invalid application context mode");
+        }
+
         // contexts
         if (m_contextApplication) { m_contextApplication->deleteLater(); }
         m_contextApplication = IContextApplication::create(this, m_config.getModeApplication(), m_dbusServer, m_dbusConnection);
@@ -312,6 +330,10 @@ namespace BlackCore
         // disable all signals towards runtime
         disconnect(this);
 
+        // tear down shared state infrastructure
+        delete m_dataLinkDBus;
+        m_dataLinkDBus = nullptr;
+
         // unregister all from DBus
         if (m_dbusServer) { m_dbusServer->removeAllObjects(); }
 

src/blackcore/corefacade.h

@@ -23,7 +23,15 @@
 #include <QObject>
 #include <QString>
 
-namespace BlackMisc { class CDBusServer; }
+namespace BlackMisc
+{
+    class CDBusServer;
+
+    namespace SharedState
+    {
+        class CDataLinkDBus;
+    }
+}
 namespace BlackCore
 {
     namespace Context
@@ -181,6 +189,9 @@ namespace BlackCore
         bool                    m_initDBusConnection = false;
         QDBusConnection         m_dbusConnection { "default" };
 
+        // shared state infrastructure
+        BlackMisc::SharedState::CDataLinkDBus *m_dataLinkDBus = nullptr;
+
         // contexts:
         // There is a reason why we do not use smart pointers here. When the context is deleted
         // we need to use deleteLater to gracefully shut the context