+++ /dev/null
-// Bank App in Java
-
-// Author: Danish Lakhani
-
-// BankAppServer - Bank Application Server that services one client at a time
-
-import java.io.*;
-import java.net.*;
-import java.util.*;
-
-class BankAppServer
-{
- static int SUCCESS = 0;
- static int ERROR = 1;
-
- static int LOGIN_ACCOUNT = 1;
- static int LOGIN_PIN = 2;
-
- static int ACCOUNT_SAVINGS = 1;
- static int ACCOUNT_CHECKING = 2;
- static int ACCOUNT_TELLER = 3;
-
- private ServerSocket serverSocket = null;
- private Socket clientSocket = null;
- private PrintWriter out = null;
- private BufferedReader in = null;
- private static int serverPort = 44444;
- private AccountDatabase accounts = null;
-
- private boolean isLoggedIn = false;
- private Integer activeAccount = 0;
- private Integer tellerCode = 0;
-
- public BankAppServer()
- {
-// initializeServer();
- }
-
- private void initializeServer()
- {
- //Initialize Database
- accounts = new AccountDatabase();
-
- //Initialize Server Socket
- System.out.print("Creating Server Socket...");
- try {
- serverSocket = new ServerSocket(serverPort);
- } catch (IOException e) {
- System.out.println("Cannot listen on port " + serverPort);
- System.exit(-1);
- }
- System.out.println("Done");
- }
-
- private void establishConnection()
- throws IOException
- {
- System.out.print("Waiting for connection...");
- try {
- clientSocket = serverSocket.accept();
- } catch (IOException e) {
- System.out.println("Accept failed");
- System.exit(-1);
- }
- out = new PrintWriter(clientSocket.getOutputStream(), true);
- in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
- System.out.println("Connection Established!");
- }
-
- private int authenticateUser(Integer accountNumber, Integer pin)
- {
- if (!accounts.accountExists(accountNumber))
- return LOGIN_ACCOUNT;
- if (accounts.getPin(accountNumber) != pin)
- return LOGIN_PIN;
- return SUCCESS;
- }
-
- private int login()
- throws IOException
- {
- out.println("OK");
- Integer accountNumber = new Integer(in.readLine());
- System.out.println("Account number: " + accountNumber);
- Integer pin = new Integer(in.readLine());
- System.out.println("PIN: " + pin);
- System.out.println("Authenticating...");
- int status = authenticateUser(accountNumber, pin);
- if (status == SUCCESS)
- {
- out.println(accountNumber);
- isLoggedIn = true;
- tellerCode = 0;
- activeAccount = 0;
- if (accounts.isTeller(accountNumber))
- tellerCode = accountNumber;
- else
- activeAccount = accountNumber;
- System.out.println("Logged Success");
- return SUCCESS;
- }
- else {
- if (status == LOGIN_ACCOUNT)
- out.println("ERROR: login failed: Account " + accountNumber + " does not exist.");
- else
- out.println("ERROR: login failed: Incorrect pin.");
- }
- System.out.println("Login Failed");
- return ERROR;
- }
-
- private void closeConnection()
- throws IOException
- {
- out.close();
- in.close();
- clientSocket.close();
-// serverSocket.close();
- }
-
- private void processDeposit(Integer accountNumber) throws IOException
- {
- String inVal;
- if (!accounts.accountExists(accountNumber))
- {
- out.println("ERROR: Account " + accountNumber + " not found.");
- return;
- }
-
- out.println("OK");
-
- //Get Deposit Amount
- inVal = in.readLine();
- Double depAmount = new Double(inVal);
- if (depAmount <= 0)
- {
- out.println("ERROR: Negative or zero deposit amount");
- return;
- }
-
- accounts.deposit(accountNumber, depAmount);
- out.println("OK");
- out.println("$" + depAmount + " deposited successfully! Account: " + accountNumber + " New Balance: " + accounts.getBalance(accountNumber));
- return;
- }
-
- private void processWithdrawal(Integer accountNumber) throws IOException
- {
- String inVal;
- if (!accounts.accountExists(accountNumber))
- {
- out.println("ERROR: Account " + accountNumber + " not found.");
- return;
- }
-
- out.println("OK");
-
- //Get withdrawal amount
- inVal = in.readLine();
- Double wdAmount = new Double(inVal);
- if (wdAmount <= 0)
- {
- out.println("ERROR: Negative or zero withdrawal amount");
- return;
- }
-// else if (wdAmount > accounts.getBalance(accountNumber))
-// {
-// out.println("ERROR: Insufficient funds. Balance = " + accounts.getBalance(accountNumber));
-// return;
-// }
-
- accounts.withdraw(accountNumber, wdAmount);
- out.println("OK");
- out.println("$" + wdAmount + " withdrawn successfully! Account: " + accountNumber + " New Balance: " + accounts.getBalance(accountNumber));
- return;
- }
-
- private void processBalanceCheck(Integer accountNumber)
- {
- out.println("OK");
- out.println("Account: " + accountNumber + " Balance: " + accounts.getBalance(accountNumber));
- return;
- }
-
- private void startServer()
- throws IOException
- {
- int serverQuit = 0;
- int status = SUCCESS;
- int isConnected = 0;
- initializeServer();
- while (serverQuit == 0)
- {
- establishConnection();
- isConnected = 1;
- accounts.loadDatabase();
- while (isConnected == 1)
- {
- System.out.println("Waiting for request...");
- // Wait for requests
- String request = in.readLine();
- if (request == null)
- continue;
-
- System.out.println("Request: " + request);
-
- // Service requests
- if (request.equals("EXIT"))
- {
- accounts.storeDatabase();
- isLoggedIn = false;
- activeAccount = 0;
- tellerCode = 0;
- closeConnection();
- isConnected = 0;
- continue;
- }
-
- if (request.equals("LOGIN"))
- {
- if (isLoggedIn)
- {
- out.println("ERROR: Already logged in. Please logout.");
- continue;
- }
- status = login();
- if (status == ERROR)
- {
-// isConnected = 0;
- continue;
- }
- }
-
- if (!isLoggedIn)
- {
- out.println("ERROR: Not logged in");
- continue;
- }
-
- if (request.equals("LOGOUT"))
- {
- out.println("OK");
- if (tellerCode == 0)
- out.println(activeAccount);
- else
- out.println(tellerCode);
- accounts.storeDatabase();
- isLoggedIn = false;
- activeAccount = 0;
- tellerCode = 0;
-// closeConnection();
-// isConnected = 0;
- }
-
- if (request.equals("DEPOSIT"))
- {
- processDeposit(activeAccount);
- }
-
- if (request.equals("WITHDRAW"))
- {
- processWithdrawal(activeAccount);
- }
-
- if (request.equals("CHECK"))
- {
- processBalanceCheck(activeAccount);
- }
-
- if (request.equals("TELLERDEPOSIT"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer acc = new Integer(in.readLine());
- processDeposit(acc);
- }
-
- if (request.equals("TELLERWITHDRAW"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer acc = new Integer(in.readLine());
- processWithdrawal(acc);
- }
-
- if (request.equals("TELLERCHECK"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer acc = new Integer(in.readLine());
- processBalanceCheck(acc);
- }
-
- if (request.equals("TELLEROPEN"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer accNum = new Integer(in.readLine());
- String fName = in.readLine();
- String mName = in.readLine();
- String lName = in.readLine();
- Integer accType = new Integer(in.readLine());
- Double bal = new Double(in.readLine());
- Integer pNum = new Integer(in.readLine());
- status = accounts.openAccount(accNum, fName, mName, lName, accType, bal, pNum);
- if (status == ERROR)
- {
- out.println("ERROR: Account " + accNum + " already exists.");
- continue;
- }
- out.println("OK");
- out.println("Account Number: " + accNum + " " +
- "Customer Name: " + fName + " " + mName + " " + lName + " " +
- "Account Type: " + ((accType == ACCOUNT_SAVINGS)?"SAVINGS":(accType == ACCOUNT_CHECKING)?"CHECKING":"TELLER") + " " +
- "Balance: $" + bal + " " +
- "PIN: " + pNum + " ");
- }
-
- if (request.equals("TELLERCLOSE"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer accNum = new Integer(in.readLine());
- status = accounts.closeAccount(accNum);
- if (status == ERROR)
- {
- out.println("ERROR: Account " + accNum + " does not exist.");
- continue;
- }
- out.println("OK");
- out.println("Account " + accNum + " closed successfully");
- }
-
- if (request.equals("TELLERMODIFY"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer accNum = new Integer(in.readLine());
- if (!accounts.accountExists(accNum))
- {
- out.println("ERROR: Account " + accNum + " does not exist.");
- continue;
- }
- out.println("OK");
- String inVal;
- while (!(inVal = in.readLine()).equals("DONE"))
- {
- if (inVal.equals("CHANGENAME"))
- {
- String fName = in.readLine();
- String mName = in.readLine();
- String lName = in.readLine();
- accounts.modifyName(accNum, fName, mName, lName);
- out.println("OK");
- }
- else if (inVal.equals("CHANGETYPE"))
- {
- Integer newType = new Integer(in.readLine());
- if (newType.intValue() < 1 || newType.intValue() > 3)
- {
- out.println("ERROR: Invalid account type: " + newType + ". Must be 1-3.");
- continue;
- }
- accounts.modifyType(accNum, newType);
- out.println("OK");
- }
- else if (inVal.equals("CHANGEPIN"))
- {
- Integer newPin = new Integer(in.readLine());
- if ((newPin < 0) || (newPin > 9999))
- {
- out.println("ERROR: Invalid pin " + newPin + ". Must be 0000-9999.");
- continue;
- }
- accounts.modifyPin(accNum, newPin);
- out.println("OK");
- }
- else if (inVal.equals("CHANGEBALANCE"))
- {
- Double newBal = new Double(in.readLine());
- accounts.modifyBalance(accNum, newBal);
- out.println("OK");
- }
- }
- out.println("Account Number: " + accNum + " " +
- "Customer Name: " + accounts.nameString(accNum) + " " +
- "Account Type: " + accounts.typeString(accNum) + " " +
- "Balance: $" + accounts.getBalance(accNum) + " " +
- "PIN: " + accounts.getPin(accNum) + " ");
- }
-
- if (request.equals("TELLERVIEW"))
- {
- if (tellerCode == 0)
- {
- out.println("ERROR: Teller not logged in");
- continue;
- }
- out.println("OK");
- Integer accNum = new Integer(in.readLine());
- if (!accounts.accountExists(accNum))
- {
- out.println("ERROR: Account " + accNum + " does not exist.");
- continue;
- }
- out.println("OK");
- out.println("Account Number: " + accNum + " " +
- "Customer Name: " + accounts.nameString(accNum) + " " +
- "Account Type: " + accounts.typeString(accNum) + " " +
- "Balance: $" + accounts.getBalance(accNum) + " " +
- "PIN: " + accounts.getPin(accNum) + " ");
- }
- }
- }
- }
-
- public static void main(String [] args)
- throws IOException
- {
- System.out.println("BankAppServer in Java");
- BankAppServer server = new BankAppServer();
- server.startServer();
- }
-}
-
-class AccountEntry
-{
- Integer accountNumber;
- String firstName;
- String middleName;
- String lastName;
- Integer accountType;
- Double balance;
- Integer pin;
-
- public AccountEntry(Integer accNum, String fName, String mName, String lName, Integer accType, Double bal, Integer pNum)
- {
- accountNumber = accNum;
- firstName = fName;
- middleName = mName;
- lastName = lName;
- accountType = accType;
- balance = bal;
- pin = pNum;
- }
-}
-
-
-class AccountDatabase
-{
- static int ACCOUNT_SAVINGS = 1;
- static int ACCOUNT_CHECKING = 2;
- static int ACCOUNT_TELLER = 3;
- static int SUCCESS = 0;
- static int ERROR = 1;
-
- static String dbfilename = "accts.txt";
-
- Vector<AccountEntry> entries = null;
-
- public AccountDatabase()
- {
- entries = new Vector<AccountEntry>();
- }
-
- public void loadDatabase()
- {
- entries.removeAllElements();
- try {
- BufferedReader fin = new BufferedReader(new FileReader(dbfilename));
- String str;
- while ((str = fin.readLine()) != null)
- {
- Integer accNum = new Integer(str);
- String fName = fin.readLine();
- String mName = fin.readLine();
- String lName = fin.readLine();
- Integer accType = new Integer(fin.readLine());
- Double bal = new Double(fin.readLine());
- Integer pNum = new Integer(fin.readLine());
- AccountEntry newEntry = new AccountEntry(accNum, fName, mName, lName, accType, bal, pNum);
- entries.add(newEntry);
- }
- fin.close();
- } catch (IOException e) {
- System.out.println("Cannot open database file");
- System.exit(-1);
- }
- printAccounts();
- }
-
- public void storeDatabase()
- {
- try {
- BufferedWriter fout = new BufferedWriter(new FileWriter(dbfilename));
- for (int i = 0; i < entries.size(); i++)
- {
- AccountEntry acc = (AccountEntry)entries.elementAt(i);
- fout.write(acc.accountNumber.toString());
- fout.newLine();
- fout.write(acc.firstName);
- fout.newLine();
- fout.write(acc.middleName);
- fout.newLine();
- fout.write(acc.lastName);
- fout.newLine();
- fout.write(acc.accountType.toString());
- fout.newLine();
- fout.write(acc.balance.toString());
- fout.newLine();
- fout.write(acc.pin.toString());
- fout.newLine();
- }
- fout.close();
- } catch (IOException e) {
- System.out.println("Cannot write to database file");
- System.exit(-1);
- }
- }
-
- public AccountEntry getAccount(Integer accNum)
- {
- for (int i = 0; i < entries.size(); i++)
- {
- AccountEntry acc = (AccountEntry)entries.elementAt(i);
- if (acc.accountNumber.equals(accNum))
- return acc;
- }
- return null;
- }
-
- public void deposit(Integer accNum, Double amount)
- {
- AccountEntry acc = getAccount(accNum);
- acc.balance += amount;
- }
-
- public void withdraw(Integer accNum, Double amount)
- {
- AccountEntry acc = getAccount(accNum);
- acc.balance -= amount;
- }
-
- public Double getBalance(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- return acc.balance;
- }
-
- public int getPin(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- return acc.pin.intValue();
- return -1;
- }
-
- public boolean accountExists(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- return true;
- return false;
- }
-
- public boolean isTeller(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc.accountType.equals(ACCOUNT_TELLER))
- return true;
- return false;
- }
-
- public Integer openAccount(Integer accNum, String fName, String mName, String lName, Integer accType, Double bal, Integer pNum)
- {
- if (accountExists(accNum))
- return ERROR;
- AccountEntry acc = new AccountEntry(accNum, fName, mName, lName, accType, bal, pNum);
- entries.add(acc);
- return SUCCESS;
- }
-
- public Integer closeAccount(Integer accNum)
- {
- if (accountExists(accNum))
- {
- AccountEntry acc = getAccount(accNum);
- entries.remove(acc);
- return SUCCESS;
- }
- else
- return ERROR;
- }
-
- public String nameString(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- return (acc.firstName + " " + acc.middleName + " " + acc.lastName);
- }
- return "";
- }
-
- public String typeString(Integer accNum)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- return ((acc.accountType == ACCOUNT_SAVINGS)?"SAVINGS":(acc.accountType == ACCOUNT_CHECKING)?"CHECKING":"TELLER");
- }
- return "";
- }
-
- public void modifyName(Integer accNum, String fName, String mName, String lName)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- acc.firstName = fName;
- acc.middleName = mName;
- acc.lastName = lName;
- }
- return;
- }
-
- public void modifyType(Integer accNum, Integer newType)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- acc.accountType = newType;
- }
- return;
- }
-
- public void modifyPin(Integer accNum, Integer newPin)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- acc.pin = newPin;
- }
- return;
- }
-
- public void modifyBalance(Integer accNum, Double newBal)
- {
- AccountEntry acc = getAccount(accNum);
- if (acc != null)
- {
- acc.balance = newBal;
- }
- return;
- }
-
- public void printAccounts()
- {
- System.out.println("entries.size = " + entries.size());
- for (int i = 0; i < entries.size(); i++)
- {
- System.out.println("Entry " + i);
- AccountEntry acc = entries.elementAt(i);
- System.out.println("1 " + acc.accountNumber.toString());
- System.out.println("2 " + acc.firstName);
- System.out.println("3 " + acc.middleName);
- System.out.println("4 " + acc.lastName);
- System.out.println("5 " + acc.accountType.toString());
- System.out.println("6 " + acc.balance.toString());
- System.out.println("7 " + acc.pin.toString());
- }
- }
-}
projects / IRC.git / blobdiff