Hi, On Thu, 30 Dec 2010 05:42:15 pm ext Bartosh Wroblevksy wrote: > Please bear with me, as it is late, and I may not write intelligibly. I am > using the publish-subscribe and it's very useful. What is not so clear to > me and (probably buried in the wonderful documentation) is if there is a > method that lets me know if QValueSpace::initValueSpaceServer() has not > been called by another process for the paths I want to reserve. In other > words, is there a method that my process can use that tells me that I can > declare a publisher and subscriber without any problem for the paths I > want and that it will work. I apologize in advance if this is clearly in > the documentation.
There is no such function. It is expected that QValueSpace::initValueSpaceServer() is only called by the dedicated server process. All other processes should only be connecting as clients. One way of testing if the server is active is to construct a QValueSpacePublisher or QValueSpaceSubscriber with a valid path and check the result of the isConnected(). However this will initialise the application as a client which cannot be undone to re-initialise as a server. You can check if the a server process is actively listening to the communications socket. You can do this with QLocalSocket. Pass "qt/valuespace_shmlayer" as the server to connect to or "qt/" + $QT_VALUESPACE_SHMLAYER environment variable if that is being set. Failure to connect would mean that the server is not running and QValueSpace::initValueSpaceServer() should be called. Calling QValueSpace::initValueSpaceServer() is, currently, only required when using the shared memory layer, which is only used on Linux and other Unix like operating systems. Cheers, -- Aaron McCarthy, Software Engineer Nokia, Qt Development Frameworks Level 1, 53 Brandl St, Brisbane Technology Park, Eight Mile Plains, QLD, Australia, 4113 http://qt.nokia.com/ _______________________________________________ Qt-mobility-feedback mailing list [email protected] http://lists.qt.nokia.com/mailman/listinfo/qt-mobility-feedback
