Das Parkhaus Besipiel unter Verwendung einer Socketverbindung über einen Port.
Client:
public class Client {
public static void main(String[] args) throws IOException {
Socket kkSocket = null;
PrintWriter out = null;
BufferedReader in = null;
try {
kkSocket = new Socket("127.0.0.1", 6700);
out = new PrintWriter(kkSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("host unknown.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: 127.0.0.1.");
System.exit(1);
}
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String fromServer;
String fromUser;
while ((fromServer = in.readLine()) != null) {
if (fromServer.equals("server quit"))
break;
System.out.println("Server: " + fromServer);
fromUser = stdIn.readLine();
out.println(fromUser);
}
System.out.println("Client down.");
out.close();
in.close();
stdIn.close();
kkSocket.close();
}
}
Server:
public class Server {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = null;
try {
serverSocket = new ServerSocket(6700);
} catch (IOException e) {
System.err.println("Could not listen on port: 6700.");
System.exit(1);
}
System.out.println("Server Running.");
Socket clientSocket = null;
try {
clientSocket = serverSocket.accept();
} catch (IOException e) {
System.err.println("Accept failed.");
System.exit(1);
}
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
BufferedReader in = new BufferedReader(
new InputStreamReader(
clientSocket.getInputStream()));
String inputLine, outputLine;
Protocol kkp = new Protocol();
outputLine = kkp.processInput(null);
out.println(outputLine);
while ((inputLine = in.readLine()) != null) {
if(inputLine.equals("quit"))
{
out.println("server quit");
break;
}
outputLine = kkp.processInput(inputLine);
out.println(outputLine);
// if (outputLine.equals("quit server"))
// break;
}
System.out.println("Server Down.");
out.close();
in.close();
clientSocket.close();
serverSocket.close();
}
}
Protocoll für den Server:
public class Protocol {
private static final int WAITING = 0;
private static final int RUNNING = 1;
private int state = WAITING;
private Parkhaus parkhaus = null;
public Protocol()
{
parkhaus = new Parkhaus(5);
}
public String processInput(String theInput) {
String theOutput = null;
if (state == WAITING) {
theOutput = "Hello Client!";
state = RUNNING;
} else if (state == RUNNING) {
if (theInput.equalsIgnoreCase("in")) {
Auto auto = new Auto(parkhaus);
if(auto.einfahrenParkhaus())
{
theOutput = "ok";
}
else
{
theOutput = "sorry, voll";
}
}
else if(theInput.equalsIgnoreCase("out")) {
Auto auto = new Auto(parkhaus);
if(auto.rausfahrenParkhaus())
{
theOutput = "ok";
}
else
{
theOutput = "sorry, leer";
}
}
else if(theInput.equalsIgnoreCase("free")) {
theOutput = "" + parkhaus.freieParkplaetze();
}
else {
theOutput = "gültige Eingaben: in, out, free, quit";
}
}
return theOutput;
}
}