The tutorial "Creating a Custom RMI Socket Factory" is at
http://java.sun.com/products/jdk/1.2/docs/guide/rmi/rmisocketfactory.doc.html
The source can be obtained by clicking on "here" near the bottom of the tutorial
web page. Compilation and execution directions are at the URL
http://java.sun.com/products/jdk/1.2/docs/guide/rmi/installedCsfHowTo.doc.html .

My attempt at this involves scripts X0.ksh, X1.ksh, X2.ksh, and X3.ksh.
They should be run, in order, from the same directory as that which contains the
source code. The variable SOURCE_DIRECTORY in the script will have to be
changed for your environment. Setting SOURCE_DIRECTORY=${PWD} should do the
trick.

algol% cat X0.ksh
#!/bin/ksh
JDK=/net/mulder.eng/export/mulder3/jdk12x/`/bin/uname -p`/jdk1.2FCS_R
PATH=${JDK}/bin:/usr/dt/bin:/usr/bin:/bin:/usr/openwin/bin
export PATH
export LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib
unset CLASSPATH
javac -d . *.java
rmic -d . examples.rmisocfac.HelloImpl

algol% cat X1.ksh
#!/bin/ksh
JDK=/net/mulder.eng/export/mulder3/jdk12x/`/bin/uname -p`/jdk1.2FCS_R
PATH=${JDK}/bin:/usr/dt/bin:/usr/bin:/bin:/usr/openwin/bin
export PATH
export LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib
unset CLASSPATH
export SOURCE_DIRECTORY=/home/ajacobs/java.dir/rmi/rmitutorial/RMISocFac
rmiregistry -J-Djava.compiler=none -J-Djava.security=${SOURCE_DIRECTORY}/mypolicy &

algol% cat X2.ksh
#!/bin/ksh
JDK=/net/mulder.eng/export/mulder3/jdk12x/`/bin/uname -p`/jdk1.2FCS_R
PATH=${JDK}/bin:/usr/dt/bin:/usr/bin:/bin:/usr/openwin/bin
export PATH
export LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib
export CLASSPATH=${HOME}/java.dir/rmi/rmitutorial/RMISocFac
export SOURCE_DIRECTORY=${HOME}/java.dir/rmi/rmitutorial/RMISocFac
java -Djava.compiler=none -Djava.rmi.server.codebase=file:${SOURCE_DIRECTORY}/ -Djava.security.policy=${SOURCE_DIRECTORY}/mypolicy examples.rmisocfac.HelloImpl

algol% cat X3.ksh
#!/bin/ksh
JDK=/net/mulder.eng/export/mulder3/jdk12x/`/bin/uname -p`/jdk1.2FCS_R
PATH=${JDK}/bin:/usr/dt/bin:/usr/bin:/bin:/usr/openwin/bin
export PATH
export LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib
export SOURCE_DIRECTORY=/home/ajacobs/java.dir/rmi/rmitutorial/RMISocFac
java -Djava.compiler=none -Djava.security.policy=${SOURCE_DIRECTORY}/mypolicy examples.rmisocfac.HelloClient

algol% cat mypolicy
grant {
        // Allow everything for now
        permission java.security.AllPermission;
};


Unfortunately, my attempt to start up the server fails.

algol% X2.ksh
Warning: JIT compiler "none" not found. Will use interpreter.
using xor sockets
HelloImpl err: access denied (java.net.SocketPermission 129.146.78.54:55323 connect,resolve)
java.security.AccessControlException: access denied (java.net.SocketPermission 129.146.78.54:55323 connect,resolve)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:246)
        at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
        at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:342)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Naming.java:165)
        at examples.rmisocfac.HelloImpl.main(HelloImpl.java:63)
java.security.AccessControlException: access denied (java.net.SocketPermission 129.146.78.54:55323 connect,resolve)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:195)
        at java.security.AccessController.checkPermission(AccessController.java:403)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
        at java.lang.SecurityManager.checkConnect(SecurityManager.java:1006)
        at java.net.Socket.<init>(Socket.java:258)
        at java.net.Socket.<init>(Socket.java:98)
        at examples.rmisocfac.XorSocket.<init>(XorSocket.java:64)
        at examples.rmisocfac.MultiClientSocketFactory.createSocket(MultiClientSocketFactory.java:68)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:462)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:194)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:178)
        at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:306)
        at sun.rmi.transport.DGCImpl_Stub.clean(Unknown Source)
        at sun.rmi.transport.DGCClient$EndpointEntry.makeCleanCalls(DGCClient.java:562)
        at sun.rmi.transport.DGCClient$EndpointEntry.access$10(DGCClient.java:557)
        at sun.rmi.transport.DGCClient$EndpointEntry$RenewCleanThread.run(DGCClient.java:476)
        at java.lang.Thread.run(Thread.java:479)

DNS should be used for looking up any machines. 129.146.78.54 is the Internet address of the
machine that the example was run on (algol).

algol% cat resolv.conf
domain eng.sun.com
nameserver 129.150.254.2
nameserver 129.146.1.151
nameserver 129.146.1.152
nameserver 129.146.1.171
algol% cat nsswitch.conf |grep hosts
# "hosts:" and "services:" in this file are used only if the
hosts: dns xfn nis [NOTFOUND=return] files


allan.jacobs@Eng 1998-11-24