The policy file

If a security manager is installed, then the code must be given proper permissions.

Listing 6.8 (policy.txt)

grant {

permission java.net.SocketPermission "localhost", "accept, connect, listen, resolve";

};

A java.net.SocketPermission represents access to a network via sockets. A SocketPermission consists of a host specification and a set of "actions" specifying ways to connect to that host.

You can use policytool to create policy files.

The security manager throws an AccessException to indicate that the caller does not have permission to perform the action requested by the method call.

Preparing for deployment

I am assuming that you have successfully compiled all the files.

Create two directories:

Server
Client

Copy the following files to the "Server" directory:

• InfoInterface.class
• InfoServerImpl.class
• InfoServerImpl_Skel.class
• InfoServerImpl_Stub.class

The "Server" directory includes all the files that are needed to run the server and those class files that will be dynamically loaded. You will deploy the above files on the server computer.

Copy the following files to the "Client" directory:

• InfoClient.class
• InfoInterface.class
• Policy.txt

You will deploy these files on the client computer.

You must copy the class file for the remote interface (such as InfoInterface). The client does not download these classes dynamically.