implement activated state

need to keep state variables on both levels,
since the session manager (lifecycle) "opens" the session
for external access by starting the dispatcher; it may well happen
thus that the session starts up, while the *session subsystem*
is not(yet) started

src/proc/control/proc-dispatcher.cpp

@@ -45,6 +45,9 @@ namespace control {
     : ThreadJoinable
     , public Sync<RecursiveLock_Waitable>
     {
+      bool canDispatch_{false};
+      bool blocked_    {false};
+      
     public:
       DispatcherLoop (Subsys::SigTerm notification)
         : ThreadJoinable("Lumiera Session"
@@ -59,6 +62,24 @@ namespace control {
           INFO (session, "Proc-Dispatcher stopped.");
         }
       
+      void
+      activateCommandProecssing()
+        {
+          Lock sync(this);
+          canDispatch_ = true;
+          INFO (command, "Session command processing activated.");
+          TODO ("implement command processing queue");
+        }
+      
+      void
+      deactivateCommandProecssing()
+        {
+          Lock sync(this);
+          canDispatch_ = false;
+          INFO (command, "Session command interface closed.");
+          TODO ("implement command processing queue");
+        }
+      
     private:
       void
       run (Subsys::SigTerm sigTerm)
@@ -107,6 +128,8 @@ namespace control {
                   termNotification(problemMessage);
                 }));
     
+    if (active_)
+      runningLoop_->activateCommandProecssing();
     return true;
   }
   
@@ -129,13 +152,21 @@ namespace control {
   }
   
   
-  /** */
+  /** activate processing of enqueued session commands.
+   * @remarks command processing serves as public external interface
+   *  to the session. This call is used by the session lifecycle (SessManagerImpl)
+   *  when the session is brought up; any other invocation runs danger to mess up
+   *  the session lifecycle state and process commands on a deconfigured session.
+   *  In case the dispatcher loop is not actually running, the activation state
+   *  is stored and applied accordingly later, when the loop is fired up.
+   */
   void
   ProcDispatcher::activate()
   {
     Lock sync(this);
-    INFO (command, "Session command processing activated.");   ///////////////TODO only emit these log messages when processing is *really* started/stopped
+    active_ = true;
-    TODO ("implement command processing queue");
+    if (runningLoop_)
+      runningLoop_->activateCommandProecssing();
   }
   
   
@@ -143,8 +174,9 @@ namespace control {
   ProcDispatcher::deactivate()
   {
     Lock sync(this);
-    INFO (command, "Session command interface closed.");
+    active_ = false;
-    TODO ("implement command processing queue");
+    if (runningLoop_)
+      runningLoop_->deactivateCommandProecssing();
   }
 
   
@@ -152,7 +184,7 @@ namespace control {
   ProcDispatcher::clear()
   {
     Lock sync(this);
-    if (!empty())
+    if (not empty())
       WARN (command, "DISCARDING pending Session commands.");
     TODO ("implement command processing queue");
   }

src/proc/control/proc-dispatcher.hpp

@@ -64,6 +64,7 @@ namespace control {
     : public lib::Sync<>
     {
       unique_ptr<DispatcherLoop> runningLoop_;
+      bool active_{false};
       
       
     public:

wiki/thinkPad.ichthyo.mm

@@ -222,8 +222,7 @@
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1481509921211" ID="ID_1515469097" MODIFIED="1481599502388" TEXT="TODO: Session-Subsystem implementieren (#318)">
 <icon BUILTIN="pencil"/>
 <node CREATED="1481599413419" ID="ID_673133356" MODIFIED="1481599420290" TEXT="Ticket #318"/>
-<node CREATED="1481599421021" ID="ID_461768132" MODIFIED="1481599492544" TEXT="Locking kl&#xe4;ren">
+<node CREATED="1481599421021" ID="ID_461768132" MODIFIED="1481686898425" TEXT="Locking kl&#xe4;ren">
-<icon BUILTIN="pencil"/>
 <node CREATED="1481684383530" ID="ID_236117" MODIFIED="1481684451657" TEXT="zwei unabh&#xe4;ngige Locks">
 <icon BUILTIN="yes"/>
 <node CREATED="1481684391921" ID="ID_138369898" MODIFIED="1481684442846" TEXT="Front-End">
@@ -257,13 +256,56 @@
 <icon BUILTIN="messagebox_warning"/>
 </node>
 </node>
-<node CREATED="1481599430804" ID="ID_1105415989" MODIFIED="1481599438887" TEXT="Forwarding-Operationen implementieren"/>
+<node CREATED="1481599430804" ID="ID_1105415989" MODIFIED="1481599438887" TEXT="Forwarding-Operationen implementieren">
-<node CREATED="1481599594399" ID="ID_1017459823" MODIFIED="1481599602601" TEXT="entscheiden, wer die Session &#xf6;ffnet">
+<node CREATED="1481686902156" ID="ID_1526215617" MODIFIED="1481686910633" TEXT="aktivieren /deaktivieren">
+<icon BUILTIN="button_ok"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1481686911938" ID="ID_17287395" MODIFIED="1481686919619" TEXT="stoppen">
+<icon BUILTIN="flag-yellow"/>
+</node>
+</node>
+<node CREATED="1481599594399" ID="ID_1017459823" MODIFIED="1481687087609" TEXT="entscheiden, wer die Session &#xf6;ffnet">
+<icon BUILTIN="button_ok"/>
+<node CREATED="1481686982097" ID="ID_1925999031" MODIFIED="1481687002238" TEXT="passiert on demand">
+<richcontent TYPE="NOTE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      ...wenn jemand zugreift
+    </p>
+  </body>
+</html>
+</richcontent>
+</node>
 <node CREATED="1481599603757" ID="ID_812618450" MODIFIED="1481599612320" TEXT="Operation auf dem SessionManager"/>
 <node CREATED="1481599612812" ID="ID_1970476027" MODIFIED="1481599618598" TEXT="der ist Singleton"/>
 <node CREATED="1481599626194" ID="ID_1815350592" MODIFIED="1481599638105" TEXT="wenn Session &#xf6;ffnet, wird der Dispatcher aktiviert">
 <icon BUILTIN="idea"/>
 </node>
+<node CREATED="1481687005813" ID="ID_1108477992" MODIFIED="1481687081246" TEXT="Entscheidung: Sesion-lifecycle und Dispatcher sind unabh&#xe4;ngig">
+<richcontent TYPE="NOTE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      grundlegende Design-Enscheidung
+    </p>
+    <ul>
+      <li>
+        wir haben Komponenten mit Dependency-Injection
+      </li>
+      <li>
+        da beide Komponenten nur nach ihren eigenen Hinsichten funktionieren,<br />wird das System insgesamt einfacher
+      </li>
+    </ul>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="yes"/>
+</node>
 </node>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1481510231986" ID="ID_45803267" MODIFIED="1481510243425" TEXT="TODO: dort SessionCommandService instantiieren">