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rmi and applets

Posted on 2003-03-02
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Last Modified: 2013-12-29
I have a working server\client application working using java rmi. I am trying to convert the client so that it works in am applet but with some difficulty.

I get this error when i do appletviewer myApplet.java:

java.sercurity.AccessControlException: access denied(java.lang.RuntimePermission createSecuritymanger)

i was told to edit my policy file which looks like this:

grant {

      permission java.lang.RuntimePermission
     "createSecurityManager";
    permission java.net.SocketPermission "*:1024-65535",
        "connect,accept";
    permission java.net.SocketPermission "*:80", "connect";        
    permission java.io.FilePermission
        "c:\\home\\ann\\public_html\\classes\\-", "read";
    permission java.io.FilePermission
        "c:\\home\\jones\\public_html\\classes\\-", "read";
};

This is not one i made myself i just used it becasuse it worked at the time, is there anything that needs changing?

Also why would changing this help my applet to run because this policy is supplied to the server not the applet, help?
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Question by:danBosh
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lorddef earned 63 total points
ID: 8054533
Hmm yeh, the security manager is throwing a wobbley because the client is not in the same dir as the server.

Now let me think, rmi is a little fuzzy in my head now.

The policy file you have above is granting specific secure permissions for use in the applet (e.g. read only, port 80 only.. etc etc), and by the looks of it this is whats restricting you.  Just for now to test if it's the policy file or not try editing it too look like this:

grant{
     permission java.security.AllPermission;
};

If this works, then play about with the specific permissions you have above to see if you can get it to work with the tighter security (you could always try editing out each line of the policy file untill you find the error).

As I said rmi is slowly escaping me, so if anybody spots a booboo feel free to correct me ;)

def
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