chat rmi server/client and peer2peer

rmi_chat_p2p/Client.java

@@ -0,0 +1,44 @@
+package rmi_chat_p2p;
+
+
+
+import java.rmi.RemoteException;
+import java.rmi.server.UnicastRemoteObject;
+import java.util.ArrayList;
+
+/**
+ * Created by Giovanni on 10/12/2014.
+ */
+public class Client extends UnicastRemoteObject implements ClientInterface {
+
+    public Client() throws RemoteException {
+        list = new ArrayList<ClientInterface>();
+    }
+
+
+    @Override
+    public void speak(Message m) throws RemoteException {
+        System.out.println(m.getFrom() +" : " + m.getM());
+    }
+
+    @Override
+    public void register(ClientInterface c, String n) throws RemoteException {
+            list.add(c);
+        System.out.println(n + " has joined");
+
+    }
+
+    @Override
+    public void unregister(ClientInterface c, String n) throws RemoteException {
+            list.remove(c);
+        System.out.println(n + " has quit");
+
+    }
+
+    public ArrayList<ClientInterface> getList() throws RemoteException{
+        return list;
+    }
+
+    private ArrayList<ClientInterface> list;
+
+}

rmi_chat_p2p/ClientInterface.java

@@ -0,0 +1,17 @@
+package rmi_chat_p2p;
+
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+import java.util.ArrayList;
+
+/**
+ * Created by Giovanni on 09/12/2014.
+ */
+public interface ClientInterface extends Remote {
+
+
+    void speak (Message m) throws RemoteException;
+    void register (ClientInterface c, String n) throws RemoteException;
+    void unregister (ClientInterface c, String n) throws RemoteException;
+
+}

rmi_chat_p2p/LaunchClient.java

@@ -0,0 +1,82 @@
+package rmi_chat_p2p;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.rmi.Naming;
+import java.rmi.NotBoundException;
+import java.rmi.RemoteException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.logging.Logger;
+
+/**
+ * Created by Giovanni on 10/12/2014.
+ */
+public class LaunchClient {
+
+    public  static Logger l = Logger.getLogger("p2p");
+    public static void main (String[] args ) {
+
+        String name = "default_name"; // or args[0]
+        String registry_id_name = name + String.valueOf(Math.random());
+        System.out.println("Name : " + name + " id :" + registry_id_name);
+
+        try {
+            ClientInterface ci = new Client();
+            String[] nodes = Naming.list("rmi://localhost");
+            l.info("List of connected nodes from registry : " + nodes.length );
+            for (int i = 0 ; i < nodes.length;i++){
+                l.info("Naming lookup of " + nodes[i] );
+                ClientInterface node = (ClientInterface) Naming.lookup( nodes[i]);
+                node.register(ci,name);
+                ((Client)ci).getList().add(node);
+            }
+            Naming.rebind(registry_id_name,ci);
+
+
+            BufferedReader i = new BufferedReader(new InputStreamReader(System.in));
+            while (true) {
+                String cmd = command(i);
+                if (!cmd.equals("quit")) {
+                    ArrayList<ClientInterface> list = ((Client)ci).getList();
+                    Iterator<ClientInterface> it = list.iterator();
+                    for ( ;it.hasNext();){
+                        it.next().speak(new Message(name,cmd));
+                    }
+                } else {
+                    ArrayList<ClientInterface> list = ((Client)ci).getList();
+                    Iterator<ClientInterface> it = list.iterator();
+                    for ( ;it.hasNext();){
+                        it.next().unregister(ci,name);
+                    }
+                    Naming.unbind(registry_id_name);
+                    break;
+                }
+            }
+        } catch (RemoteException e) {
+            e.printStackTrace();
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (NotBoundException e) {
+            e.printStackTrace();
+        }
+        finally {
+            System.exit(0);
+        }
+
+
+    }
+
+    private static String command (BufferedReader i){
+        try {
+            return i.readLine();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return "quit";
+    }
+
+
+}

rmi_chat_p2p/Message.java

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+package rmi_chat_p2p;
+
+import java.io.Serializable;
+
+/**
+ * Created by Giovanni on 10/12/2014.
+ */
+public class Message implements Serializable{
+
+    public Message(String ifrom, String im){
+        from = ifrom;
+        m = im;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public String getM() {
+        return m;
+    }
+
+    private final String from;
+    private final String m;
+
+}