Class ClientServer.ClientServerThread

java.lang.Object
  java.lang.Thread
      ClientServer.ClientServerThread

All Implemented Interfaces:

Runnable

Enclosing class:

ClientServer

public class ClientServer.ClientServerThread

extends Thread

Handles new client connections.

Nested Class Summary

class

ClientServer.ClientServerThread.TelnetInputReader This class handles the input gathering and processing functions as well as the required echoing.

Field Summary

private Socket	client
private ClientServer	cserv
private BufferedInputStream	in
private PrintWriter	out
(package private) String	password
(package private) String	username
(package private) boolean	validUser

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

ClientServer.ClientServerThread(Socket _client, ClientServer _cserv)
Constructs the thread.

Method Summary

private int	dropDrink(String username, int slot, int delay) Attempt to drop a drink, checking both user balance and slot quantity first.
private void	negotiate(PrintWriter out) Performs the telnet negotiation.
private void	printOptions() Prints the options the user has.
private void	printSlots() Print the contents of the drink machine and then the users balance.
void	run() This is the meat of the client.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

client

private Socket client

cserv

private ClientServer cserv

out

private PrintWriter out

in

private BufferedInputStream in

username

String username

password

String password

validUser

boolean validUser

Constructor Detail

ClientServer.ClientServerThread

public ClientServer.ClientServerThread(Socket _client,
                                       ClientServer _cserv)

Constructs the thread.

Parameters:

_client - The socket to the client

_cserv - The ClientServer we interact with to inc/dec the number of connected clients

Method Detail

run

public void run()

This is the meat of the client. The socket is connected to a TelnetPrintWriter, a BufferedInputStream and an TelnetInputReader. The client is then negotiated using negotiate() and the session begins.

negotiate

private void negotiate(PrintWriter out)
                throws IOException

Performs the telnet negotiation. Basically, we just want to make sure that we get to do the echoing.

Parameters:

out - The PrintWriter that we write to.

Throws:

IOException

dropDrink

private int dropDrink(String username,
                      int slot,
                      int delay)
               throws IOException

Attempt to drop a drink, checking both user balance and slot quantity first. Note, this method does not authenticate the user, that should be checked outside of this method.

Parameters:

username - The username to charge for the drink

slot - The slot to drop

delay - The delay (in seconds) to wait before dropping

Returns:

0 if the drop is successful. 1 if The slot is empty. 2 if the user is poor. 3 if the slot number is incorrect. 4 if there is an unspecified failure.

Throws:

IOException

printOptions

private void printOptions()

Prints the options the user has. The options available depend on whether or not the user is an admin.

printSlots

private void printSlots()

Print the contents of the drink machine and then the users balance.