Completed version 1.0.0 of HPDOS. Need to benchmark.

code/hpdos_rdma_offloaded/src/main/java/hpdos_rdma_offloaded/MetadataServer.java

@@ -74,7 +74,7 @@ public class MetadataServer implements Runnable{
         storageHandler = new StorageHandler(properties.getProperty("app.db_path"));
         networkHandler = new NetworkHandler(isMaster);
         // metadataServerService =  new MasterMetadataServerService(this.networkHandler,storageHandler);
-       registrationHandler = new RegistrationHandler(isMaster,host,registrationPort, networkHandler);
+       registrationHandler = new RegistrationHandler(isMaster, host, registrationPort, networkHandler);
        if(isMaster)
         {
             

code/hpdos_rdma_offloaded/src/main/java/hpdos_rdma_offloaded/handler/RegistrationHandler.java

@@ -3,12 +3,17 @@ package hpdos_rdma_offloaded.handler;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import java.io.OutputStream;
 import java.lang.ClassNotFoundException;
 import java.net.InetAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 
+import hpdos_rdma_offloaded.lib.Follower;
+
 public class RegistrationHandler {
     public ServerSocket server;
     public int port = 9876;
@@ -41,7 +46,7 @@ public class RegistrationHandler {
     }
 
     private void sendRegistrationRequest(String message) throws IOException {
-        System.out.println("Sending a registration request");
+        System.out.println("Sending a registration request with message: "+message);
         InetAddress host = InetAddress.getByName(this.registrationServerIp);
         Socket socket = null;
         ObjectOutputStream oos = null;
@@ -97,7 +102,14 @@ public class RegistrationHandler {
                     while (true) {
                         Socket socket = serverSocket.accept();
                         ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
+                        OutputStream outputStream = socket.getOutputStream();
+                        ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
                         String ip = (String) ois.readObject();
+                        String ips = registrationServerIp + ";";
+                        for (Follower follower : NetworkHandler.followers) {
+                            ips = ips + follower.getIpAdress() + ";";
+                        }
+                        objectOutputStream.writeObject(ips);
                         NetworkHandler networkHandler = new NetworkHandler();
                         networkHandler.connectToSal(ip);
                         // clientProcessingPool.submit(new ClientTask(clientSocket));

code/hpdos_rdma_offloaded/src/main/java/hpdos_rdma_offloaded/handler/ReplicationHandler.java

@@ -28,7 +28,7 @@ public class ReplicationHandler {
 
     public static void replicateMetadata(Packet packet) throws InterruptedException, ExecutionException{
         Set<Callable<DaRPCFuture<Request, Response>>> callables = new HashSet<>();
-        for(Follower follower : followers){
+        for(Follower follower : NetworkHandler.followers){
             callables.add(()->{
                 Request request = new Request();
                 Response response = new Response();

code/hpdos_rdma_offloaded/src/main/java/hpdos_rdma_offloaded/lib/Follower.java

 package hpdos_rdma_offloaded.lib;
 
+import java.io.Serializable;
+
 import com.ibm.darpc.DaRPCStream;
 
 import hpdos_rdma_offloaded.protocol.*;
 
-public class Follower {
+public class Follower implements Serializable {
+    private static final long serialVersionUID = 0L;
     String ipAddress;
     String followerId;
     DaRPCStream<Request, Response> stream;

code/hpdos_rdma_offloaded/src/main/java/hpdos_rdma_offloaded/service/MasterMetadataServerService.java

@@ -121,7 +121,8 @@ public class MasterMetadataServerService extends RpcProtocol implements DaRPCSer
 
     @Override
     public void close(DaRPCServerEndpoint<Request, Response> rpcClientEndpoint) {
-        System.out.println("Closing Connection");   
+        System.out.println("Closing Connection");
+        
         // try
         // {
         //     invalidationClientEpStreams.remove(rpcClientEndpoint.getDstAddr());