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need code for multicasting in java

need code for multicasting in java

umaragavan21

@umaragavan21-Fy1jWo • Oct 26, 2024

Oct 26, 2024

1.5K

multicasting in java, which contains a single administrator and and a single leader for each sub group

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • May 15, 2011

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

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umaragavan21

@umaragavan21-Fy1jWo • May 15, 2011

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

@praveenkumar-66Ze92 • May 15, 2011

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

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umaragavan21

@umaragavan21-Fy1jWo • May 15, 2011

#-Link-Snipped-#
please have a look at this link. The paper is PLEASE, âPâ-LEAder SElection for Multicast Group Communication

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • May 15, 2011

Sure... 😀 Will help ya out!!! 😀

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umaragavan21

@umaragavan21-Fy1jWo • May 15, 2011

thank u so much

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • 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

@praveenkumar-66Ze92 • 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

@umaragavan21-Fy1jWo • May 15, 2011

i m going to implement the same project

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umaragavan21

@umaragavan21-Fy1jWo • May 15, 2011

this code is not working

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • May 15, 2011

Can you post the code?

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umaragavan21

@umaragavan21-Fy1jWo • 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

@umaragavan21-Fy1jWo • 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

@umaragavan21-Fy1jWo • 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

@praveenkumar-66Ze92 • May 15, 2011

Error log please...

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • May 15, 2011

Did you include the MulticastServer class first???

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umaragavan21

@umaragavan21-Fy1jWo • May 16, 2011

ya i included.

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PraveenKumar Purushothaman

@praveenkumar-66Ze92 • May 16, 2011

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

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umaragavan21

@umaragavan21-Fy1jWo • May 16, 2011

praveenscienceOki, 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

@praveenkumar-66Ze92 • 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

@umaragavan21-Fy1jWo • 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

@praveenkumar-66Ze92 • May 16, 2011

Woah.. Congrats,., 😀

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