--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/alice/daemon/MulticastConnection.java	Thu May 15 15:44:22 2014 +0900
@@ -0,0 +1,45 @@
+package alice.daemon;
+
+import java.io.IOException;
+import java.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.channels.DatagramChannel;
+
+import alice.codesegment.SingletonMessage;
+import alice.datasegment.Command;
+
+public class MulticastConnection extends Connection {
+	private DatagramChannel dc;
+	private SocketAddress sAddr;
+
+
+	public MulticastConnection(DatagramChannel d, SocketAddress s) {
+		dc = d;
+		sAddr = s;
+	}
+
+	@Override
+	public synchronized void write(Command cmd){
+		CommandMessage cmdMsg = cmd.convert();
+		ByteBuffer buffer;
+		try {
+			buffer = ByteBuffer.wrap(SingletonMessage.getInstance().write(cmdMsg));
+			while (buffer.hasRemaining()){
+				dc.send(buffer, sAddr);
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+
+	}
+
+	@Override
+	public void close(){
+		try {
+			dc.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/alice/datasegment/MulticastDataSegmentManager.java	Thu May 15 15:44:22 2014 +0900
@@ -0,0 +1,106 @@
+package alice.datasegment;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.StandardProtocolFamily;
+import java.net.StandardSocketOptions;
+import java.nio.channels.DatagramChannel;
+import org.apache.log4j.Logger;
+
+import alice.codesegment.CodeSegment;
+import alice.daemon.Connection;
+
+public class MulticastDataSegmentManager extends DataSegmentManager {
+	Connection connection;
+	Logger logger;
+	
+	public MulticastDataSegmentManager(final String MCASTADDR, final int port, final String nis) {
+		logger = Logger.getLogger("multicast");
+		connection = new Connection();
+		DatagramChannel dc =  createDatagramChannel(MCASTADDR, port, nis);
+		
+	}
+	
+	private DatagramChannel createDatagramChannel(String MCASTADDR, int port, String nis) {
+		DatagramChannel dc = null;
+		NetworkInterface ni;
+		try {
+			ni = NetworkInterface.getByName(nis);
+			if (ni==null) {
+				System.err.println("Can't open network interface "+nis);
+				throw new IOException();
+			}
+			if (!ni.supportsMulticast()) {
+				System.err.println("Network interface does not support multicast"+nis);
+				throw new IOException();
+			}
+			
+			dc = DatagramChannel.open(StandardProtocolFamily.INET);
+			dc.setOption(StandardSocketOptions.SO_REUSEADDR, true);
+			dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, ni);
+			InetAddress group = InetAddress.getByName(MCASTADDR);
+			dc.join(group, ni);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return dc;
+	}
+	
+	@Override
+	public void put(String key, Object val) {
+		
+	}
+
+	@Override
+	public void update(String key, Object val) {
+				
+	}
+
+	@Override
+	public void take(Receiver receiver, CodeSegment cs) {}
+	@Override
+	public void peek(Receiver receiver, CodeSegment cs) {}
+
+	@Override
+	public void quickPut(String key, Object val) {
+		
+	}
+
+	@Override
+	public void quickUpdate(String key, Object val) {
+		
+	}
+
+	@Override
+	public void quickPeek(Receiver receiver, CodeSegment cs) {}
+	@Override
+	public void quickTake(Receiver receiver, CodeSegment cs) {}
+
+	@Override
+	public void remove(String key) {
+		
+	}
+
+	@Override
+	public void shutdown() {
+		
+	}
+
+	@Override
+	public void close() {
+		
+	}
+
+	@Override
+	public void finish() {
+		
+	}
+
+	@Override
+	public void ping(String returnKey) {}
+
+	@Override
+	public void response(String returnKey) {}
+
+}