/**
* Method to create a socket to connect the client to the server
*
* @throws IOException
*/
private void connectToServer() throws IOException {
displayMessage("Attempting connection...\n");
InetAddress ipAddress =
InetAddress.getByName(clientAddress); // object that holds the ip address of the client
clientSocket = new Socket(ipAddress, port); // create Socket to make connection to server
displayMessage("Successful Connection\n"); // successful connection message
}
/**
* Method to close the connection between the client and the server. Input and output streams that
* were opened by the client are closed, and the socket through which the client and server were
* using to is closed as well.
*/
private void closeConnection() {
displayMessage("\nAttempting to close connection...");
try {
clientOutputStream.close(); // close client output stream
clientInputStream.close(); // close client input stream
clientSocket.close(); // close socket
displayMessage("Connection successfully closed");
} catch (IOException ioException) {
System.out.println("IO Exception in closeConnection Method");
}
}
/**
* Method that uses the socket to send data from the client to the server using the
* ObjectOutputStream variable
*
* @param message
*/
private void sendData(String message) {
try {
clientOutputStream.writeObject(
"CLIENT: " + message); // writes message to stream to be sent to server
clientOutputStream.flush(); // clears buffer
displayMessage("\nCLIENT: " + message);
} catch (IOException ioException) {
System.out.println("IO Exception in sendData Method");
}
}
/**
* Method that keeps the connection alive between client and server and stays open until
* connection is terminated
*
* @throws IOException
*/
private void handleConnection() throws IOException {
boolean clientIsAlive = true;
// continually keep the connection open and read the messages from the server until the
// connection is closed
do {
try {
// readObject is used to read an object from the stream and then casted as a string
messageFromServer = (String) clientInputStream.readObject();
displayMessage("\n" + messageFromServer); // display message
}
// no definition for the readObject class was found
catch (ClassNotFoundException classNotFoundException) {
System.out.println("Class Not found exception in handleConnection");
}
} while (clientIsAlive
== true); // keep going until connection terminated (Infinite until exit/Server closes)
}
public void run() {
while (true) {
switch (Thread.currentThread().getName()) {
case "SEND":
try {
sendMessage();
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
case "RECV":
try {
displayMessage();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}