public void commandFromConsole(String command) {
if (command.isEmpty()) return;
String[] cmdArray = command.split(", ");
if (cmdArray.length < 1) return;
CommandType type = CommandType.None;
try {
type = CommandType.valueOf(cmdArray[0]);
} catch (NullPointerException | IllegalArgumentException e) {
LOG.error("unknown command : {}", e.getMessage());
}
switch (type) {
case GetDeviceList:
parent.setCommandFromUnit(new GetDeviceListCommand());
break;
case Help:
viewHelp();
break;
case Exit:
parent.setCommandFromUnit(new ExitCommand());
break;
case SetDeviceParameter:
setDeviceParameter(cmdArray);
break;
default:
}
}
public static void main(String[] args) {
if (args.length < 4) {
System.err.println(
"Bad parameters: Paramters(s): <server (name or Ip address)> <port> <Op> <Payload>");
return;
}
InetAddress server;
int port;
JackMessageOpType op;
String payload;
try {
server = InetAddress.getByName(args[0]);
port = Integer.parseInt(args[1]);
if (!NamePortPair.isValidPort(port)) {
System.err.println("Bad parameters: port must be an integer 1-65535");
return;
}
if (args[2].length() != 1) {
System.err.println("Bad parameters: op must be a single character");
return;
}
op = JackMessageOpType.getTypeByOpCode(args[2].charAt(0));
if (op == null) {
System.err.println("Bad parameters: " + args[2].charAt(0) + " is not a valid op");
return;
}
payload = args[3];
} catch (NumberFormatException e) {
System.err.println("Bad parameters: could not parse port");
return;
} catch (UnknownHostException e) {
System.err.println("Communication problem: unable to find server");
return;
}
DatagramSocket clientSocket;
try {
clientSocket = new DatagramSocket();
clientSocket.connect(server, port);
clientSocket.setSoTimeout(RESPONSE_WAIT_TIMEOUT);
} catch (IOException e) {
System.err.println(
"Communication problem: could connect to " + server.getHostAddress() + ":" + port);
e.printStackTrace();
return;
}
Message msgToSend;
DatagramPacket toSend;
try {
String msgString = (op.getOpCode() + " " + payload);
msgToSend = Message.decode(msgString.getBytes(StandardCharsets.US_ASCII));
toSend = new DatagramPacket(msgToSend.encode(), msgToSend.encode().length);
clientSocket.send(toSend);
} catch (NullPointerException | IllegalArgumentException e) {
System.err.println("Bad parameters: invalid payload " + e.getMessage());
terminateSocket(clientSocket);
return;
} catch (IOException e) {
System.err.println("Communication problem: send");
terminateSocket(clientSocket);
return;
}
int trasmitAttemptCount = 0;
boolean recievedResponse = false;
DatagramPacket recievedPacket =
new DatagramPacket(new byte[MAX_PACKET_LENGTH], MAX_PACKET_LENGTH);
do {
trasmitAttemptCount++;
try {
clientSocket.receive(recievedPacket);
if (!recievedPacket.getAddress().equals(server)) {
throw new IOException("Received packet from an unknown source");
}
} catch (SocketTimeoutException e) {
try {
clientSocket.send(toSend);
} catch (IOException e1) {
System.err.println("Communication problem: send");
terminateSocket(clientSocket);
return;
}
continue;
} catch (IOException e) {
System.err.println("Communication problem: unknown");
terminateSocket(clientSocket);
return;
}
Message recievedMessage;
try {
recievedMessage =
Message.decode(
Arrays.copyOfRange(recievedPacket.getData(), 0, recievedPacket.getLength()));
} catch (NullPointerException | IllegalArgumentException e) {
System.err.println("Invalid message: decode receive " + e.getMessage());
continue;
}
switch (recievedMessage.getOp()) {
case QUERY:
System.err.println("Unexpected message type");
continue;
case NEW:
System.err.println("Unexpected message type");
continue;
case ERROR:
System.err.println(
"Error: " + ((bettercom.jack.serialization.Error) recievedMessage).getErrorMessage());
terminateSocket(clientSocket);
return;
case RESPONSE:
if (msgToSend.getOp() == JackMessageOpType.QUERY) {
System.out.println("Recieved: " + recievedMessage);
recievedResponse = true;
break;
} else {
System.err.println("Unexpected message type");
continue;
}
case ACK_NEW:
if (msgToSend.getOp() == JackMessageOpType.NEW) {
if (msgToSend.generatePayload().equals(recievedMessage.generatePayload())) {
System.out.println("Recieved: " + recievedMessage);
recievedResponse = true;
break;
} else {
System.err.println("Unexpected ACK");
continue;
}
} else {
System.err.println("Unexpected message type");
continue;
}
default:
System.err.println("Invalid message: switch op");
continue;
}
} while ((!recievedResponse) && (trasmitAttemptCount < MAX_RETRY));
if (trasmitAttemptCount >= MAX_RETRY) {
System.err.println("No response after 3 retransmissions");
}
terminateSocket(clientSocket);
}