I'm having problems in a GOOP application with multiple instances of the same object running simultaneously.
I?ve written an application to control a system with multiple lamps. Each lamp in the system has its own power supply. Each lamp object contains a reference to its power supply. The application contains an array with the references to all the lamps in the system. Each lamp is in charge of monitoring itself and setting its power supply?s voltage according to the applications commands, therefore each lamp needs that its ?run me? method will run as long as the application is running i.e. the run method has to be reentrant. Because there are multiple lamps and because the ?run me? methods for each lamp run simultaneously, to over come this problem each lamp has a met
hod ?run? that calls ?run me? with ?RUN VI? invoke node with the ?Wait until done? set to false. When I run the application, it seems to work but if I check the AO there is no change in the output, and the lamps seem to be reading their input from the same channel. I can?t seem to find the problem, I think that the fact that the method is reentrant causes some sort of mix-up in the separate object references. Also because the method is reentrant I can?t debug it (with one lamp it seems to work ok). Does anyone have any idea what could be causing this problem.
P.S I'm having problems attaching my sample program to this message. You can contact me at [email protected] to recive the sample program I wrote.
Jean, Thanks for your answer, I've tried checking the invoke node that calls the "Run VI" method but it doesnt return an error any of the times its called even that the Vi that it called is still running. I also tried your solution of changing the object's "Run" method to a template but that doesnt work either. I can't seem to post the sample progam that demonstrates the problem, is it possible to send it to you by email, contact me at [email protected]
Attachments:
Sample_program.zip 926 KB
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Problem:Multiple instances of the same applet on a webpage...
I have an applet which connects to a server to read an XML-file.
I use Doucument to parse the XML-file like this:
String xmlurl="http://www.somesite.com/somexmlpage.php";
Document d =DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlurl);
(...read the XML-file...)
This works fine.
However, I need multiple instances of the same applet running at the same time on the same webpage.
Now, with multiple applets running at the same time the parsing no loger works. If one applet is doing some parsing and a taskswitch takes place to let another applet run, the applet which is interrupted is not able to continue the parsing as it looses its "incoming data" when another applet reads from the server.
How can different applets affect each other like this?
And how can I fix the problem?
Thanks in advance for any help!!However, I need multiple instances of the same applet running at the same time on the same webpage.
Why? But okay.Because the the different applets show information about different items.
Now, with multiple applets running at the same time the parsing no loger works. If one applet is doing some parsing and a
taskswitch takes place to let another applet run, the applet which is interrupted is not able to continue the
parsing as it looses its "incoming data" when another applet reads from the server.
How did you determine that's what's happening?By printing out debuginformation.
Each applet prints out a message (System.out.println) when it creates an instance of Document (ie. connects to the server) and the applet also prints out XML-information as the XML-file is processed.
But, actually, I was a bit quick in my first post; The applet doesen't neccesarily loose its "incoming data", but the parser looses the data it is parsing. I can download the data from the server first, and then start parsing it. If a taskswitch happens while one applet is parsing, it looses its data, even if the data is allready downloaded.
I see this since I see another applet making a printout, and when first applet starts again, the parser has lost track of its data.
It works fine if only one applet is running. And everything is fine until the next applets starts; I can see this from the printout.
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Hi everybody,
I got a small animation written in actionscript 2.0. I need
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Anyway, it's a relatively simple script (not complex
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refreshing), so I think the problem could be the fact of having so
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Is there any way to fix this problem without reducing the
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Perhaps I didnt explain the situation clearly enough (in part
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function refreshing the flame each time.
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- It is my first time trying to embed so many objects at the
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That would explain why the more instances I run, the worst results
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Any other comment would be appreciated. Anyway, thanks a lot
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I ran another test. This time I have a bean that makes use of a connector
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And so, managedConn1 and managedConn2 got lost in the way...
What's more puzzling, it's that when monitoring my connector with the
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