If these processes will be on different systems, then I doubt that you have any choice. :-) On May 17, 2013 5:27 AM, "Charley Bay" <charleyb...@gmail.com> wrote:
> I have a C++ QObject-derived class that exposes properties for use in QML, > works fine (Qt5). > > WHAT I WANT: > > I would like to instantiate an "instance" of this class in each of two > processes, where changes in one "notifies" the other (in the other > process). This is logically something like "local-instance-reflection" to > a remote instance in a remote process. > > (I could create a second class-type if needed, but current implementation > suggests I could instantiate the same class type on each side.) > > My current thoughts are to use a "socket" between the two processes, where > the objects "agree" on a unique identifier that represents that > "reflected-instance" in each process. Then, the implementation would > trigger "onChange" operations in the remote-instance from property-changes > in the local-instance. There would be many of these "reflecting-pairs". > > This "implementation-plumbing" would probably be through some C++ > implemented dispatcher, where one would be instantiated in each process, > and be responsible for the serialization for state-changes/notifications > between the processes (read/write), and routing the notification to the > object in the local process. > > A concern I have is that there will be *many* of these pairs (thousands, > possibly tens-of-thousands), and I don't know if the approach would > scale-well for lots of notifications. > > Does this design seem reasonable? > > Do you have thoughts on an alternative? > > It seems like the "Q_PROPERTY" notification through QML would be an > interesting mechanism to enable this "generic-cross-process" > event-based-synchronization. > > I can't use shared memory, as these processes will typically be on > different machines. > > --charley > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > >
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