adding Freeze filesystem demo

1 files changed, 154 insertions, 0 deletions

diff --git a/java/demo/book/freeze_filesystem/Client.java b/java/demo/book/freeze_filesystem/Client.java
new file mode 100644
index 00000000000..10f58722fb7
--- /dev/null
+++ b/java/demo/book/freeze_filesystem/Client.java
@@ -0,0 +1,154 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+import Filesystem.*;
+
+public class Client extends Ice.Application
+{
+    class ShutdownHook extends Thread
+    {
+        public void
+        run()
+        {
+            try
+            {
+                communicator().destroy();
+            }
+            catch(Ice.LocalException ex)
+            {
+                ex.printStackTrace();
+            }
+        }
+    }
+
+    public int
+    run(String[] args)
+    {
+        //
+        // Since this is an interactive demo we want to clear the
+        // Application installed interrupt callback and install our
+        // own shutdown hook.
+        //
+        setInterruptHook(new ShutdownHook());
+
+        //
+        // Create a proxy for the root directory.
+        //
+        DirectoryPrx rootDir = DirectoryPrxHelper.checkedCast(communicator().propertyToProxy("RootDir.Proxy"));
+        if(rootDir == null)
+        {
+            System.err.println("Client: invalid proxy");
+            return 1;
+        }
+
+        try
+        {
+            //
+            // Create a file called "README" in the root directory.
+            //
+            try
+            {
+                FilePrx readme = rootDir.createFile("README");
+                String[] text = new String[1];
+                text[0] = "This file system contains a collection of poetry.";
+                readme.write(text);
+                System.out.println("Created README.");
+            }
+            catch(NameInUse ex)
+            {
+                //
+                // Ignore - file already exists.
+                //
+            }
+
+            //
+            // Create a directory called "Coleridge" in the root directory.
+            //
+            DirectoryPrx coleridge = null;
+            try
+            {
+                coleridge = rootDir.createDirectory("Coleridge");
+                System.out.println("Created Coleridge.");
+            }
+            catch(NameInUse ex)
+            {
+                NodeDesc desc = rootDir.resolve("Coleridge");
+                coleridge = DirectoryPrxHelper.checkedCast(desc.proxy);
+                assert(coleridge != null);
+            }
+
+            //
+            // Create a file called "Kubla_Khan" in the Coleridge directory.
+            //
+            try
+            {
+                FilePrx file = coleridge.createFile("Kubla_Khan");
+                String[] text = new String[5];
+                text[0] = "In Xanadu did Kubla Khan";
+                text[1] = "A stately pleasure-dome decree:";
+                text[2] = "Where Alph, the sacred river, ran";
+                text[3] = "Through caverns measureless to man";
+                text[4] = "Down to a sunless sea.";
+                file.write(text);
+                System.out.println("Created Coleridge/Kubla_Khan.");
+            }
+            catch(NameInUse ex)
+            {
+                //
+                // Ignore - file already exists.
+                //
+            }
+
+            System.out.println("Contents of filesystem:");
+            java.util.Map contents = rootDir.list(ListMode.RecursiveList);
+            java.util.Iterator p = contents.keySet().iterator();
+            while(p.hasNext())
+            {
+                System.out.println("  " + (String)p.next());
+            }
+
+            NodeDesc desc = rootDir.resolve("Coleridge/Kubla_Khan");
+            FilePrx file = FilePrxHelper.checkedCast(desc.proxy);
+            assert(file != null);
+            String[] text = file.read();
+            System.out.println("Contents of file Coleridge/Kubla_Khan:");
+            for(int i = 0; i < text.length; ++i)
+            {
+                System.out.println("  " + text[i]);
+            }
+
+            //
+            // Destroy the filesystem.
+            //
+            contents = rootDir.list(ListMode.NormalList);
+            p = contents.entrySet().iterator();
+            while(p.hasNext())
+            {
+                java.util.Map.Entry e = (java.util.Map.Entry)p.next();
+                NodeDesc d = (NodeDesc)e.getValue();
+                System.out.println("Destroying " + (String)e.getKey() + "...");
+                d.proxy.destroy();
+            }
+        }
+        catch(Ice.UserException ex)
+        {
+            ex.printStackTrace();
+        }
+
+        return 0;
+    }
+
+    public static void
+    main(String[] args)
+    {
+        Client app = new Client();
+        int status = app.main("Client", args, "config.client");
+        System.exit(status);
+    }
+}