Repeat the last step, but add a delay of 3 seconds between iterations in the sender (so that the sender will wait for 3 seconds before sending another message to the receiver). Capture a significant portion of the output. Describe and explain the order of the messages received by the receiver.

Question

This exercise guides you through experiments with connectionless datagram socket via code sample Example1. As a start, it is recommended that you run both programs on one machine, the host name of which you may refer to as “localhost”, as in the command “java Example1Sender localhost 12345 hello” to execute Example1Sender. You may optionally repeat the exercises by running the programs on separate machines, assuming that you have access to such machines.

Answer 1

The code change in the receiver is as follows:

```
while (true) {
byte[ ] buffer = message.getBytes( );
DatagramPacket datagram =
new DatagramPacket(buffer, buffer.length,
receiverHost, receiverPort);
mySocket.send(datagram);
Thread.sleep(3000);
} // end while
```

The output of the messages are interleaved. The senders essentially takes turns in sending messages to the same datagram socket on the receiver:
message1
message2
message1
message2
…