From 7e3854810b6e0203e1b4cfc72264b156fb0bcab0 Mon Sep 17 00:00:00 2001
From: Rasha Djurdjevic <radomir.djurdjevic@outlook.com>
Date: Tue, 5 Jan 2021 18:17:08 +0100
Subject: [PATCH] #1 scaffold the Root Nameserver

---
 .../dslab/nameserver/NameServerRemote.java    | 25 +++++++++++++++++++
 .../java/dslab/nameserver/Nameserver.java     | 25 ++++++++++++++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/dslab/nameserver/NameServerRemote.java

diff --git a/src/main/java/dslab/nameserver/NameServerRemote.java b/src/main/java/dslab/nameserver/NameServerRemote.java
new file mode 100644
index 0000000..7fda166
--- /dev/null
+++ b/src/main/java/dslab/nameserver/NameServerRemote.java
@@ -0,0 +1,25 @@
+package dslab.nameserver;
+
+import java.rmi.RemoteException;
+
+public class NameServerRemote implements INameserverRemote {
+    @Override
+    public void registerNameserver(String domain, INameserverRemote nameserver) throws RemoteException, AlreadyRegisteredException, InvalidDomainException {
+
+    }
+
+    @Override
+    public void registerMailboxServer(String domain, String address) throws RemoteException, AlreadyRegisteredException, InvalidDomainException {
+
+    }
+
+    @Override
+    public INameserverRemote getNameserver(String zone) throws RemoteException {
+        return null;
+    }
+
+    @Override
+    public String lookup(String username) throws RemoteException {
+        return null;
+    }
+}
diff --git a/src/main/java/dslab/nameserver/Nameserver.java b/src/main/java/dslab/nameserver/Nameserver.java
index 81171a3..59835e1 100644
--- a/src/main/java/dslab/nameserver/Nameserver.java
+++ b/src/main/java/dslab/nameserver/Nameserver.java
@@ -2,12 +2,18 @@ package dslab.nameserver;
 
 import java.io.InputStream;
 import java.io.PrintStream;
+import java.rmi.*;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+import java.rmi.server.UnicastRemoteObject;
 
 import dslab.ComponentFactory;
 import dslab.util.Config;
 
 public class Nameserver implements INameserver {
 
+    static Registry REGISTRY;
+
     /**
      * Creates a new server instance.
      *
@@ -17,7 +23,24 @@ public class Nameserver implements INameserver {
      * @param out the output stream to write console output to
      */
     public Nameserver(String componentId, Config config, InputStream in, PrintStream out) {
-        // TODO
+        // only root nameserver creates RMI registry
+        if (componentId.equals("ns-root")) {
+            int registryPort = config.getInt("registry.port");
+            String registryName = config.getString("root_id");
+            INameserverRemote nameserverRemote = new NameServerRemote();
+            try {
+                INameserverRemote stub = (INameserverRemote) UnicastRemoteObject.exportObject(nameserverRemote, registryPort);
+                REGISTRY = LocateRegistry.createRegistry(registryPort);
+                REGISTRY.rebind(registryName, stub);
+                System.out.println("Nameserver bound.");
+            } catch (RemoteException e) {
+                System.err.println("Nameserver exception:");
+                e.printStackTrace();
+            }
+        } else {
+            // TODO zone nameservers
+            System.out.println("Zone Nameserver");
+        }
     }
 
     @Override