Server.java

//
// Copyright (c) ZeroC, Inc. All rights reserved.
//

import com.zeroc.demos.Manual.simpleFilesystem.Filesystem.*;

public class Server
{
    public static void main(String[] args)
    {
        int status = 0;
        java.util.List<String> extraArgs = new java.util.ArrayList<String>();

        //
        // Try with resources block - communicator is automatically destroyed
        // at the end of this try block
        //
        try(com.zeroc.Ice.Communicator communicator = com.zeroc.Ice.Util.initialize(args, extraArgs))
        {
            communicator.getProperties().setProperty("Ice.Default.Package", "com.zeroc.demos.Manual.simpleFilesystem");
            //
            // Install shutdown hook to (also) destroy communicator during JVM shutdown.
            // This ensures the communicator gets destroyed when the user interrupts the application with Ctrl-C.
            //
            Runtime.getRuntime().addShutdownHook(new Thread(() -> communicator.destroy()));

            if(!extraArgs.isEmpty())
            {
                System.err.println("too many arguments");
                status = 1;
            }
            else
            {
                status = run(communicator);
            }
        }

        System.exit(status);
    }

    private static int run(com.zeroc.Ice.Communicator communicator)
    {
        //
        // Create an object adapter.
        //
        com.zeroc.Ice.ObjectAdapter adapter =
            communicator.createObjectAdapterWithEndpoints("SimpleFilesystem", "default -h localhost -p 10000");

        //
        // Create the root directory (with name "/" and no parent)
        //
        DirectoryI root = new DirectoryI("/", null);
        root.activate(adapter);

        //
        // Create a file called "README" in the root directory
        //
        FileI file = new FileI("README", root);
        String[] text;
        text = new String[]{ "This file system contains a collection of poetry." };
        try
        {
            file.write(text, null);
        }
        catch(GenericError e)
        {
            System.err.println(e.reason);
        }
        file.activate(adapter);

        //
        // Create a directory called "Coleridge" in the root directory
        //
        DirectoryI coleridge = new DirectoryI("Coleridge", root);
        coleridge.activate(adapter);

        //
        // Create a file called "Kubla_Khan" in the Coleridge directory
        //
        file = new FileI("Kubla_Khan", coleridge);
        text = new String[]{ "In Xanadu did Kubla Khan",
                             "A stately pleasure-dome decree:",
                             "Where Alph, the sacred river, ran",
                             "Through caverns measureless to man",
                             "Down to a sunless sea." };
        try
        {
            file.write(text, null);
        }
        catch(GenericError e)
        {
            System.err.println(e.reason);
        }
        file.activate(adapter);

        //
        // All objects are created, allow client requests now
        //
        adapter.activate();

        //
        // Wait until we are done
        //
        communicator.waitForShutdown();

        return 0;
    }
}