Lab 1

1. Here are two implementation of the "time server" example Mark had in class:
• using sockets: Sockets example
• using RMI: RMI example
2. Please take a look at the code and try to understand it. Ask questions!
3. Copy the content of both folders (including the make file) to your directory.
4. Compile the examples. You just have to run make for each example.  It would also be useful to take a look at the Makefile.
5. Run the examples.
• Sockets example: Start the server on one machine and  the client on a different machine. The client will connect to the server; read the time and print it out.
• RMI example.  
• In client and server code replace buda.cs.uchicago.edu with the machine you start the server on. Compile.
• Start rmiregistry
• On the machine you started rmiregistry start the server using:
• java -Djava.rmi.server.codebase=file:///${HOME}/stuff/RMI_Example/ -Djava.security.policy=${HOME}/stuff/RMI_Example/policy TimeServerImpl
• Note: ${HOME}/stuff/RMI_Example/ has to be replaced with  the path to you code directory while ${HOME}/stuff/RMI_Example/policy has to be replaced with the path to your policy file
• On a different machine start the client with:
• java -Djava.security.policy=${HOME}/stuff/RMI_Example/policy Client
6. Work on the following lab assignment
7. Reminder: subscribe to the mailing list.