From fbcf6b691373def6ef4627ab016cbe7b59b3198d Mon Sep 17 00:00:00 2001
From: brutzman <brutzman@nps.edu>
Date: Thu, 12 Jul 2018 08:33:20 -0700
Subject: [PATCH] complete legacy deletion
---
.../MaroonMulticastSenderExample.java | 86 -------------------
1 file changed, 86 deletions(-)
delete mode 100644 projects/Assignments/homework2/MaroonMulticastSenderExample.java
diff --git a/projects/Assignments/homework2/MaroonMulticastSenderExample.java b/projects/Assignments/homework2/MaroonMulticastSenderExample.java
deleted file mode 100644
index b1c27a4c26..0000000000
--- a/projects/Assignments/homework2/MaroonMulticastSenderExample.java
+++ /dev/null
@@ -1,86 +0,0 @@
-
-
-
-import java.io.*;
-import java.net.*;
-
-/**
- * Looks a lot like a UDP sender.
- *
- * @author mcgredo
- */
-public class MaroonMulticastSenderExample {
-
- public static final String MULTICAST_ADDRESS = "239.1.2.15";
- public static final int DESTINATION_PORT = 1717;
- /** How many routers can be crossed */
- public static final int TTL = 10; // Time to Live is decrement counter to limit scope
-
- public static void main(String[] args)
- {
- try
- {
- // This is a java/IPv6 problem. You should also add it to the
- // arguments used to start the app, eg -Djava.net.preferIPv4Stack=true
- // set in the "run" section of preferences. Also, typically
- // netbeans must be restarted after these settings.
- // https://stackoverflow.com/questions/18747134/getting-cant-assign-requested-address-java-net-socketexception-using-ehcache
- System.setProperty("java.net.preferIPv4Stack", "true");
-
-
- MulticastSocket multicastSocket = new MulticastSocket(1718);
- multicastSocket.setTimeToLive(TTL);
- InetAddress multicastAddress = InetAddress.getByName(MULTICAST_ADDRESS);
- System.out.println(multicastAddress);
- // Join group useful on receiving side
- multicastSocket.joinGroup(multicastAddress);
- // You can join multiple groups here
-
- // Put together a message with binary content. "ByteArrayOutputStream"
- // is a java.io utility that lets us put together an array of binary
- // data, which we put into the UDP packet.
-
- ByteArrayOutputStream baos = new ByteArrayOutputStream();
- DataOutputStream dos = new DataOutputStream(baos);
- dos.writeInt(1);
- String message = "**********************************";
- dos.writeInt(message.length());
- dos.writeChars(message);
- byte[] buffer = baos.toByteArray();
-
- DatagramPacket packet1 = new DatagramPacket(buffer, buffer.length, multicastAddress, DESTINATION_PORT);
-
- baos.reset();
- dos.writeInt(2);
- message = "<===========================>";
-
- dos.writeInt(message.length());
- dos.writeChars(message);
- buffer = baos.toByteArray();
-
- DatagramPacket packet2 = new DatagramPacket(buffer, buffer.length, multicastAddress, DESTINATION_PORT);
-
-
- // How fast does this go? Does UDP try to slow it down, or does
- // this cause network problems? (hint: yes for an unlimited send
- // rate, unlike TCP). How do you know on the receiving side
- // that you haven't received a duplicate UDP packet, out of
- // order packet, or dropped packet?
-
- for(int idx = 0; idx < 1000; idx++)
- {
-
- multicastSocket.send(packet1);
- multicastSocket.send(packet2);
-
- Thread.sleep(1000); // Send 100, one per second
- System.out.println("Sent multicast packet " + idx + " of 100");
- }
- }
- catch(Exception e)
- {
- System.out.println(e);
- }
- }
-
-}
--
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