diff --git a/doc/devel/uml/Session-subsystem.png b/doc/devel/uml/Session-subsystem.png new file mode 100644 index 000000000..6804a4832 Binary files /dev/null and b/doc/devel/uml/Session-subsystem.png differ diff --git a/src/proc/control/command-dispatch.hpp b/src/proc/control/command-dispatch.hpp new file mode 100644 index 000000000..9fc3de1e9 --- /dev/null +++ b/src/proc/control/command-dispatch.hpp @@ -0,0 +1,95 @@ +/* + COMMAND-DISPATCH.hpp - Interface to enqueue and dispatch command messages + + Copyright (C) Lumiera.org + 2009, Hermann Vosseler + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + + +/** @file command-dispatch.hpp + ** Interface to abstract the DispatcherLoop's ability to handle command messages. + ** //TODO + ** + ** @see proc-dispatcher.hpp + ** @see session-command-service.hpp + ** @see DispatcherLoop + ** + */ + + + +#ifndef PROC_CONTROL_COMMAND_DISPATCH_H +#define PROC_CONTROL_COMMAND_DISPATCH_H + +//#include "lib/symbol.hpp" +#include "common/subsys.hpp" +#include "lib/depend.hpp" +#include "lib/sync.hpp" + +#include +//#include + + + +namespace proc { +namespace control { + +// using lib::Symbol; + using std::unique_ptr; +// using std::bind; + using lumiera::Subsys; + + + class DispatcherLoop; + + + /** + * @todo Type-comment + */ + class ProcDispatcher + : public lib::Sync<> + { + unique_ptr runningLoop_; + bool active_{false}; + + + public: + static lib::Depend instance; + + bool start (Subsys::SigTerm); + bool isRunning(); + void requestStop(); + + void activate(); + void deactivate(); + void clear(); + + + /* == diagnostics == */ + +// size_t size() const ; + bool empty() const ; + + }; + ////////////////TODO currently just fleshing out the API.... + + + + +}} // namespace proc::control +#endif /*PROC_CONTROL_COMMAND_DISPATCH_H*/ diff --git a/src/proc/control/proc-dispatcher.hpp b/src/proc/control/proc-dispatcher.hpp index 0e117946d..7cf02ab4a 100644 --- a/src/proc/control/proc-dispatcher.hpp +++ b/src/proc/control/proc-dispatcher.hpp @@ -32,8 +32,8 @@ -#ifndef CONTROL_PROC_DISPATCHER_H -#define CONTROL_PROC_DISPATCHER_H +#ifndef PROC_CONTROL_PROC_DISPATCHER_H +#define PROC_CONTROL_PROC_DISPATCHER_H //#include "lib/symbol.hpp" #include "common/subsys.hpp" @@ -91,4 +91,4 @@ namespace control { }} // namespace proc::control -#endif +#endif /*PROC_CONTROL_PROC_DISPATCHER_H*/ diff --git a/uml/Lumiera.xmi b/uml/Lumiera.xmi index 5141e9fdb..d776a1e99 100644 --- a/uml/Lumiera.xmi +++ b/uml/Lumiera.xmi @@ -1,5 +1,5 @@ - + umbrello uml modeller http://umbrello.kde.org @@ -33,6 +33,7 @@ + @@ -51,6 +52,7 @@ + @@ -103,7 +105,7 @@ - + @@ -173,7 +175,187 @@ - + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + @@ -244,6 +426,58 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + @@ -355,7 +589,7 @@ - + @@ -372,6 +606,7 @@ + @@ -382,14 +617,15 @@ + - + - + @@ -413,8 +649,38 @@ - + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + @@ -571,11 +837,11 @@ - +
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+ + + + diff --git a/wiki/renderengine.html b/wiki/renderengine.html index 7ff1ce4dc..6cca8d71b 100644 --- a/wiki/renderengine.html +++ b/wiki/renderengine.html @@ -6071,7 +6071,7 @@ The concurrent nature of the problem is what makes this simple task somewhat mor * referrals to already known sequence points might be added later, and also from different threads ({{red{WIP 3/14}}} not sure if we need to expand on this observation -- see CalcStream &hArr; Segment) This structure looks like requiring a message passing approach: we can arrange for determining the actual dependencies and fulfillment state late, within a single consumer, which is responsible for invoking the triggers. The other clients (threads) just pass messages into a possibly lock-free messageing channel. -
+
The Session contains all information, state and objects to be edited by the User. From a users view, the Session is synonymous to the //current Project//. It can be [[saved and loaded|SessionLifecycle]]. The individual Objects within the Session, i.e. Clips, Media, Effects, are contained in one (or several) collections within the Session, which we call [[Sequence]].
 &rarr; [[Session design overview|SessionOverview]]
 &rarr; Structure of the SessionInterface
@@ -6089,7 +6089,7 @@ The Session object is a singleton &mdash; actually it is a »~PImpl«-Facade
 
 
 !Session lifecycle
-The session lifecycle need to be distinguished from the state of the //session subsystem.// The latter is one of the major components of Lumiera, and when it is brought up, the {{{SessionCommandFacade}}} is opened and the ProcDispatcher started. On the other hand, the session as such is a data structure and pulled up on demand, by the {{{SessionManager}}}. Whenever the session is fully populated and configured, the ProcDispatcher is instructed to //actually allow dispatching of commands towards the session.// This command dispatching mechanism is the actual access point to the session for clients outside Proc-Layer; when dispatching is halted, commands can be enqueued non the less, which allows for a reactive UI.
+The session lifecycle need to be distinguished from the state of the [[session subsystem|SessionSubsystem]]. The latter is one of the major components of Lumiera, and when it is brought up, the {{{SessionCommandFacade}}} is opened and the ProcDispatcher started. On the other hand, the session as such is a data structure and pulled up on demand, by the {{{SessionManager}}}. Whenever the session is fully populated and configured, the ProcDispatcher is instructed to //actually allow dispatching of commands towards the session.// This command dispatching mechanism is the actual access point to the session for clients outside Proc-Layer; when dispatching is halted, commands can be enqueued non the less, which allows for a reactive UI.
@@ -6371,6 +6371,13 @@ And last but not least: the difficult part of this whole concept is encapsulated {{red{WIP ... draft}}}
+
+
//A subsystem within Proc-Layer, responsible for lifecycle and access to the editing [[Session]].//
+[img[Structure of the Session Subsystem|uml/Session-subsystem.png]]
+
+!Structure
+The ProcDispatcher is at the heart of the //Session Subsystem.// Because the official interface for working on the session, the {{{SessionCommand}}} façade, is expressed in terms of sending command messages to invoke predefined [[commands|CommandHandling]] to operate on the SessionInterface, the actual implementation of such a {{{SessionCommandService}}} needs a component actually to enqueue and dispatch those commands -- which is the {{{DispatcherLoop}}} within the ProcDispatcher. As usual, the ''lifecycle'' is controlled by a subsystem descriptor, which starts and stopps the whole subsystem; and this starting and stopping in turn translates into starting/stopping of the dispatcher loop. On the other hand, //activation of the dispatcher,// which means actively to dispatch commands, is controlled by the lifecycle of the session proper. The latter is just a data structure, and can be loaded / saved and rebuilt through the ''session manager''.
+
<<search>><<closeAll>><<permaview>><<newTiddler>><<saveChanges>><<slider chkSliderOptionsPanel OptionsPanel "options »" "Change TiddlyWiki advanced options">>
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm index 855991614..9128bf5a1 100644 --- a/wiki/thinkPad.ichthyo.mm +++ b/wiki/thinkPad.ichthyo.mm @@ -212,10 +212,201 @@ - - - + + + + + + + + + +

+ setzt aktivierten Dispatcher zwingend voraus +

+ + + + + + + +

+ es genügt definitiv nicht, nur die Dispatcher-Komponente(Schnittstelle) erreichen zu können. +

+

+ Jede Operation, die über dieses externe Interface bereitsteht, benötigt zur Implementierung +

+

+ eine aktiv laufende Dispatcher-Queue. +

+

+ +

+

+ Daher macht es Sinn, den Interface-Lebenszyklus ganz starr an den Disspatcher zu binden +

+ + + + + + + + + +

+ ...und zwar wirklich sehr implizit, +

+

+ nämlich über die Identität (IDs) der Command-Parameter. +

+

+ Das heißt, ein eingehendes Command paßt nur zu einer bestimmten Session-Instanz, +

+

+ was zwar jederzeit (via statisches/internes Session-API) verifizierbar ist, jedoch nicht offensichtlich +

+ + + + + + + + + +

+ das folgt einfach aus den logischen Eigenschaften der beteiligten Komponenten, +

+

+ welche eben autonom sind. +

+

+ +

+

+ Das heißt im Klartext, alle Clients müssen darauf vorbereitet sein, daß diese Schnittstelle +

+

+ jederzeit wegbrechen kann, was dann heißt, daß irgend ein Aufruf eine Exception wirft +

+ + + + + + + + + + + + +

+ wer besitzt die +

+

+ Implementierung +

+ + + + + + + + + + + + + + + + +

+ meint: zwei gekoppelte Statusvariable +

+ + + + + + + + + + + + + + + + + + + + + + +

+ muß alle Operationen durchschleifen +

+

+ oder muß PImpl als Interface exponieren +

+ + + + + + + + + + +

+ meint: zwei gekoppelte Statusvariable +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + +

+ Shutdown tricky +

+ + + + + + @@ -310,6 +501,12 @@ + + + + + +