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  • need code for multicasting in java

    umaragavan21

    umaragavan21

    @umaragavan21-Fy1jWo
    Updated: Oct 26, 2024
    Views: 1.3K
    multicasting in java, which contains a single administrator and and a single leader for each sub group
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Replies

  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Please explain the problem fully. Multicasting, you say, but its actually Typecasting...
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  • umaragavan21

    Member • May 15, 2011

    [​IMG]
    i have to implement this model
    which has one administrator for the whole group and sub group leader for each subgroup.The administrator sends a message to each sub group leader and the subgroup leaders send that message to their group members.
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Unable to open the image or the link you have specified man!
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  • umaragavan21

    Member • May 15, 2011

    #-Link-Snipped-#
    please have a look at this link. The paper is PLEASE, ‘P’-LEAder SElection for Multicast Group Communication
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Sure... 😀 Will help ya out!!! 😀
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  • umaragavan21

    Member • May 15, 2011

    thank u so much
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Hey, this is Multicast Networking... You heard of broadcast and telecast right? The same way this works. And for Java, what are you trying to do, the same project or you have any other idea? Like sending a bulk SMS to many? 😉
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Check this out... For developers they have given a tutorial on how to multicast using Java... 😀
    #-Link-Snipped-# 😀
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  • umaragavan21

    Member • May 15, 2011

    i m going to implement the same project
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  • umaragavan21

    Member • May 15, 2011

    this code is not working
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Can you post the code?
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  • umaragavan21

    Member • May 15, 2011

    import java.io.*;
    import java.net.*;
    import java.util.*;

    public class MulticastClient {

    public static void main(String[] args) throws IOException {

    MulticastSocket socket = new MulticastSocket(4446);
    InetAddress address = InetAddress.getByName("230.0.0.1");
    socket.joinGroup(address);

    DatagramPacket packet;

    // get a few quotes
    for (int i = 0; i < 5; i++) {

    byte[] buf = new byte[256];
    packet = new DatagramPacket(buf, buf.length);
    socket.receive(packet);

    String received = new String(packet.getData(), 0, packet.getLength());
    System.out.println("Quote of the Moment: " + received);
    }

    socket.leaveGroup(address);
    socket.close();
    }

    }
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  • umaragavan21

    Member • May 15, 2011

    import java.io.*;
    import java.net.*;
    import java.util.*;

    public class MulticastServerThread extends QuoteServerThread {

    private long FIVE_SECONDS = 5000;

    public MulticastServerThread() throws IOException {
    super("MulticastServerThread");
    }

    public void run() {
    while (moreQuotes) {
    try {
    byte[] buf = new byte[256];

    // construct quote
    String dString = null;
    if (in == null)
    dString = new Date().toString();
    else
    dString = getNextQuote();
    buf = dString.getBytes();

    // send it
    InetAddress group = InetAddress.getByName("230.0.0.1");
    DatagramPacket packet = new DatagramPacket(buf, buf.length, group, 4446);
    socket.send(packet);

    // sleep for a while
    try {
    sleep((long)(Math.random() * FIVE_SECONDS));
    } catch (InterruptedException e) { }
    } catch (IOException e) {
    e.printStackTrace();
    moreQuotes = false;
    }
    }
    socket.close();
    }
    }
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  • umaragavan21

    Member • May 15, 2011

    public class MulticastServer {
    public static void main(String[] args) throws java.io.IOException {
    new MulticastServerThread().start();
    }
    }
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Error log please...
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  • PraveenKumar Purushothaman

    Member • May 15, 2011

    Did you include the MulticastServer class first???
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  • umaragavan21

    Member • May 16, 2011

    ya i included.
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  • PraveenKumar Purushothaman

    Member • May 16, 2011

    Oki, send the error log here... Please wrap it up in code tags... 😀
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  • umaragavan21

    Member • May 16, 2011

    praveenscience
    Oki, send the error log here... Please wrap it up in code tags... 😀[/QUOTE
    i getting error in MulticastServer
    " cant find symbol public class MulticastServerThread extends QuoteServerThread"'
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  • PraveenKumar Purushothaman

    Member • May 16, 2011

    Dude, that's what I said, you haven't included the class MulticastServerThread correctly!!! Include it and it works... 😀
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  • umaragavan21

    Member • May 16, 2011

    ya now it works without error but when i run MulticastServer i am getting an error couldnot open quote file.Serving time instead
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  • PraveenKumar Purushothaman

    Member • May 16, 2011

    Woah.. Congrats,., 😀
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