| package Client; | |
| /* | |
| * ClientNetwork.java | |
| */ | |
| import java.io.*; | |
| import java.net.*; | |
| import Common.*; | |
| /**This class is the Network component used by the server GUI | |
| * to communicate with the client. It uses sendMessageToClient(Message) | |
| * to send a message to the client. It calls gotMessageFromClient(Message) | |
| * of its "Server" (GUI Component) when a message is recieved | |
| * by its reader | |
| */ | |
| public class ClientNetwork | |
| { | |
| /**This it the GUI Client of this network component*/ | |
| protected Client myClient; | |
| /**This is the Socket the client will use to communicate with the server*/ | |
| protected Socket socket; | |
| /**A new thread which is created to read messages sent from the server. | |
| * Remains blocked most of the time on a socket read call. Gets unblocked | |
| * on recieving a message. | |
| */ | |
| protected ClientSocketReader reader; | |
| /**Writes messages to be sent to the server on the socket.*/ | |
| protected ClientSocketWriter writer; | |
| /**Constructor taking the host to connect to and the port number | |
| * @param host The name (or IP) of the server to connect to. | |
| * @param port The port number on which the server is listening. | |
| */ | |
| public ClientNetwork(Client myClient, String host, int port) | |
| { | |
| this.myClient = myClient; | |
| try | |
| { | |
| socket = new Socket(host, port); | |
| reader = new ClientSocketReader(this); | |
| writer = new ClientSocketWriter(this); | |
| showMessage("About to start Reader..."); | |
| reader.start(); | |
| //writer.start(); | |
| } | |
| catch (UnknownHostException uhe) | |
| { | |
| showMessage("The host: " + host + " was not found...Quitting now."); | |
| System.exit(1); | |
| } | |
| catch (IOException e) | |
| { | |
| System.err.println(e); | |
| System.exit(1); | |
| } | |
| } | |
| /**Method to call when the Client needs to send message a message | |
| * to the server. | |
| * @param msg The message that is to be sent to the server by the Client. | |
| */ | |
| public void sendMessageToServer(Message msg) | |
| { | |
| this.writer.writeMessageToServer(msg); | |
| } | |
| /**Method that is called by the Reader when it recieves a message | |
| * from the server. This method in turn calls the Client (GUI Component) | |
| * version of this method. | |
| * @param The message recieved from the server. | |
| */ | |
| public void gotMessageFromServer(Message msg) | |
| { | |
| this.myClient.gotMessageFromServer(msg); | |
| } | |
| /**A small function to display messages. | |
| * @param msg The message string to show. | |
| */ | |
| private static void showMessage(String msg) | |
| { | |
| System.err.println("ClientNetwork: " + msg); | |
| } | |
| } | |