[java] Help with RMI
Author
So, I have a small RMI demo app which has a few classes, Server, Client and NetworkInterface (which is the interface that the Server publishes to the RMI registry)
Server starts up, sets up RMI, just sits idly in a thread, which is exactly what I wanted.
I run the Client, it's all fine, it has no problem connecting and executing the server's methods.
Ok, so this brings me to my problem:
In Server's implementation of NetworkInterface, (which takes a reference to it's parent Server object when you create it) the methods published to RMI call another method on the Server object, which just for test purposes increments an int inside the Server instance (private int _myData)
Each time I run the Client, (without killing the server, mind you) I expect the _myData to increase by 1. However, each time, it just gets reset to the initial value. So the problem I'm having is, how can I make the RMI methods actually change some internal server variables?
Author
It's a bit clunky to open up 5 rafb/paste windows, so here, I uploaded all the .java files:
http://www.acsu.buffalo.edu/~dhf2/rmidemo/
Client and Server are obvious (they both have main methods, when I run this I open up three consoles, one I do rmiregistry 1119, the other one I start server and then in the third I start client.
And NetworkImplementation is just the server's implementation of NetworkInterface.
http://www.acsu.buffalo.edu/~dhf2/rmidemo/
Client and Server are obvious (they both have main methods, when I run this I open up three consoles, one I do rmiregistry 1119, the other one I start server and then in the third I start client.
And NetworkImplementation is just the server's implementation of NetworkInterface.
Ok so i can't even get this running, i get:
C:\Users\Dave\Desktop\rmidemo>java Server
Exception: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: NetworkImplementation
RMI initialized.
Server thread started.
I assume you don't get that exception?
C:\Users\Dave\Desktop\rmidemo>java Server
Exception: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: NetworkImplementation
RMI initialized.
Server thread started.
I assume you don't get that exception?
Author
It's a problem with the classpath, I think. Don't run it from the directory with the .class files, go up a directory and do java rmidemo/Server
Don't forget to run "rmiregistry 1119" in another console before you start the server
Don't forget to run "rmiregistry 1119" in another console before you start the server
I have tried all of that. I have removed the package declaration from each file to make it a bit easier.
Please, use the "source" tag and post your code, that way we all will be able to help you :D
[ source lang="java" ]
[ /source ]
[ source lang="java" ]
[ /source ]
Author
I don't see what could be going wrong for you, but I exported the Eclipse project as a jar here and put it in the same directory as those .java files.
Also, I don't want to just post the code here, it's too long.
Also, I don't want to just post the code here, it's too long.
Author
I found a tutorial on the net that might answer my question, so I'm gonna play with that for the night.
This topic is closed to new replies.
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