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COSC-3P91-Assignments
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fix sync issue

main
Brett 2023-04-15 21:12:05 -04:00
parent 5ce406f376
commit a2cbc5d3af
2 changed files with 50 additions and 18 deletions
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24
Assignment 4/src/ca/cosc3p91/a4/util/network/Client.java
View File

@ -40,6 +40,17 @@ public class Client implements Runnable {
view.printGameMenu();
}
ArrayList<Long> removes = new ArrayList<>();
for (HashMap.Entry<Long, Message.Sent> message : sentMessages.entrySet()){
Message.Sent sent = message.getValue();
if (!sent.isAcknowledged() && sent.getTimeSinceSent().get() > Server.MAX_PACKET_ACK_TIME_SECONDS) {
System.out.println("The server did not acknowledge our message, did they receive it?");
sendMessage(sent);
removes.add(message.getKey());
}
}
for (Long l : removes)
sentMessages.remove(l);
}
clientSocket.close();
}
@ -57,14 +68,19 @@ public class Client implements Runnable {
long clientID = stream.readLong();
long messageID = stream.readLong();
System.out.println("Receiving message with ID " + messageID + " to client: " + clientID + " of type " + packetID);
switch (packetID) {
case PacketTable.ACK:
Message.Sent message = sentMessages.get(messageID);
if (message == null)
throw new RuntimeException("Server message sync error!");
throw new RuntimeException("Server acknowledged a message we never sent! (" + messageID + ")");
message.acknowledged();
sentMessages.remove(messageID);
System.out.println("Message acknowledged " + messageID);
System.out.println("Message acknowledged with ID: " + messageID);
System.out.println("Messages left: " + sentMessages.size());
for (HashMap.Entry<Long, Message.Sent> ms : sentMessages.entrySet())
System.out.println("MessageID: " + ms.getKey());
break;
case PacketTable.DISCONNECT:
running = false;
@ -78,10 +94,12 @@ public class Client implements Runnable {
}
private void sendMessage(Message.Sent message){
sentMessages.put(message.getMessageID(), message);
if (message.getMessageID() != PacketTable.ACK)
sentMessages.put(message.getMessageID(), message);
byte[] data = message.getData().toByteArray();
DatagramPacket sendPacket = new DatagramPacket(data, data.length, serverAddress, Server.SERVER_PORT);
try {
System.out.println("Sending message with ID " + message.getMessageID() + " to server from: " + message.getClientID() + " of type " + message.getPacketID());
clientSocket.send(sendPacket);
} catch (Exception e) {
e.printStackTrace();

44
Assignment 4/src/ca/cosc3p91/a4/util/network/Server.java
View File

@ -7,6 +7,7 @@ import java.io.*;
import java.net.*;
import java.rmi.ServerException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.PriorityQueue;
import java.util.Queue;
@ -33,6 +34,8 @@ public class Server implements Runnable {
socket = new DatagramSocket(SERVER_PORT);
ioThread = new Thread(this);
ioThread.start();
mainEngine = new GameEngine();
}
public void run(){
@ -50,21 +53,25 @@ public class Server implements Runnable {
long clientID = stream.readLong();
long messageID = stream.readLong();
System.out.println("Receiving message with ID " + messageID + " to client: " + clientID + " of type " + packetID);
ConnectedClient client = clients.get(clientID);
// the server must handle connection requests while the client's processing thread will handle all other messages
if (packetID == PacketTable.CONNECT){
clients.put(++clientAssignmentID, new ConnectedClient(socket, mainEngine, clientID, messageID, receivePacket.getAddress(), receivePacket.getPort()));
} else if (packetID == PacketTable.DISCONNECT) {
if (client == null)
throw new ServerException("Client disconnected with invalid client id! (" + clientID + ")");
client.halt();
clients.put(clientID, null);
} else {
if (client == null)
throw new ServerException("Client message with invalid client id! (" + clientID + ")");
client.handleRequest(new Message.Received(packetID, clientID, messageID, stream, receivePacket.getData()));
long cid = ++clientAssignmentID;
System.out.println("A client has connected, his clientID is " + cid);
clients.put(cid, new ConnectedClient(socket, mainEngine, cid, messageID, receivePacket.getAddress(), receivePacket.getPort()));
continue;
}
if (client == null)
throw new ServerException("Client disconnected with invalid client id! (" + clientID + ")");
if (packetID == PacketTable.DISCONNECT) {
client.halt();
clients.remove(clientID);
continue;
}
client.handleRequest(new Message.Received(packetID, clientID, messageID, stream, receivePacket.getData()));
} catch (IOException | InterruptedException e) {
throw new RuntimeException(e);
}
@ -104,7 +111,7 @@ public class Server implements Runnable {
processingThread = new Thread(this);
processingThread.start();
gameEngineThread = new Thread(() -> {
while (true) {
while (running) {
if (this.allowUpdate.get()) {
engine.updateMap(clientMap);
}
@ -131,6 +138,7 @@ public class Server implements Runnable {
if (message == null)
throw new RuntimeException("A message was acknowledged but does not exist!");
message.acknowledged();
sentMessages.remove(request.getMessageID());
break;
case PacketTable.MESSAGE:
System.out.println(request.getReader().readUTF());
@ -153,22 +161,28 @@ public class Server implements Runnable {
}
requestLock.unlock();
ArrayList<Long> removes = new ArrayList<>();
for (HashMap.Entry<Long, Message.Sent> message : sentMessages.entrySet()){
if (message.getValue().getTimeSinceSent().get() > MAX_PACKET_ACK_TIME_SECONDS) {
System.out.println("The server did not process our message, did they receive it?");
sendMessage(message.getValue());
Message.Sent sent = message.getValue();
if (!sent.isAcknowledged() && sent.getTimeSinceSent().get() > MAX_PACKET_ACK_TIME_SECONDS) {
System.out.println("The client did not acknowledge our message, did they receive it?");
sendMessage(sent);
}
}
for (Long l : removes)
sentMessages.remove(l);
}
}
public void sendMessage(Message.Sent message){
this.sentMessages.put(message.getMessageID(), message);
if (message.getMessageID() != PacketTable.ACK)
this.sentMessages.put(message.getMessageID(), message);
byte[] data = message.getData().toByteArray();
if (data.length > PACKET_SIZE)
throw new RuntimeException("Unable to send packet as it exceeds maximum packet size!");
DatagramPacket request = new DatagramPacket(data, data.length, address, port);
try {
System.out.println("Sending message with ID " + message.getMessageID() + " to client: " + message.getClientID() + " of type " + message.getPacketID());
serverSocket.send(request);
} catch (IOException e) {
e.printStackTrace();