Give an outline of the server implementation showing how the operations getRequest and sendReply are used by a server that creates a new thread to execute each client request. Indicate how the server will copy the requestId from the request message into the reply message and how it will obtain the client IP address and port..

Question

What will be an ideal response?

Answer 1

```
class Server{
private int serverPort = 8888;
public static int messageLength = 1000; DatagramSocket mySocket;

public Server(){
mySocket = new DatagramSocket(serverPort);
while(true){
byte [] request = getRequest(); Worker w = new Worker(request);
}
}
public byte [] getRequest(){
//as above}
public void sendReply(byte[]reply, InetAddress clientHost, int clientPort){
// as above}
}
class Worker extends Thread { InetAddress clientHost;
int clientPort; int requestId; byte [] request;
public Worker(request){
// extract fields of message into instance variables
}
public void run(){
try{
req = request.unmarshal();
byte [] args = req.getArgs();
//unmarshall args, execute operation,
// get results marshalled as array of bytes in result RequestMessage rm = new RequestMessage( requestId, result); reply = rm.marshal();
sendReply(reply, clientHost, clientPort );
}catch {... }
}
}
```