Esercizio RMI

Server

import java.io.*; class Item implements Serializable { private String category, itemNumber, descr; private int value, cost, bidder, bidAmount, code; public Item () { category ="";itemNumber ="";descr ="";value = 0;cost = 0;bidder =-1;bidAmount = 0;code = 0; } public Item(String num, String pdescr, int pval) { category = ""; itemNumber = num; descr = pdescr; value = pval; cost = 0; bidder = -1; bidAmount = 0;code = 0; } public Item(String num, String pdescr, int pval, int pcost) { category = ""; itemNumber = num; descr = pdescr; value = pval; cost = pcost; bidder = -1; bidAmount = 0; code = 0; } 3

public void setCategory (String val) { category= val; } public String getCategory () { return category; } public void setItemNumber(String val) { itemNumber = val; } public String getItemNumber () { return itemNumber; } public void setDescr (String val) { descr = val; } public String getDescr () { return descr; } public void setValue (int val) { value = val; } public int getValue () { return value; } public void makeBid (int pbidder, int pbid) { bidder = pbidder; bidAmount = pbid; } public int getBidder() { return bidder; } public int getBidAmount() { return bidAmount; } 4

public int getDonationAmount () { if (value >= bidAmount) return 0; else return bidAmount - value; } public int getProfitAmount () { return bidAmount - cost; } public void setCode (int val) { code = val; } public int getCode () { return code; } 5

public void inFromCVS ( String arg) { System.out.println (arg); String[] results = getFromCVSForm (arg); category = results[0]; results = getFromCVSForm (results[1]); itemNumber = results[0]; results = getFromCVSForm (results[1]); descr = results[0]; results = getFromCVSForm (results[1]); try{ value = Integer.parseInt (results[0]); } catch (NumberFormatException e) { value = 0; } results = getFromCVSForm (results[1]); try{ bidder = Integer.parseInt (results[0]); } catch (NumberFormatException e) { bidder = -1; } results = getFromCVSForm (results[1]); try{ bidAmount = Integer.parseInt (results[0]); } catch (NumberFormatException e) { bidAmount = 0; } } 6

static public String [] getFromCVSForm (String arg) { String[] results = new String[2]; int endPos=1; boolean goOn=true; if (arg.length() == 0) { results[0] = ""; results[1] = ""; } else if (arg.charAt(0) == '\"') { while (goOn) { if (arg.charAt(endPos) != '\"') endPos++; else if (endPos+1 >= arg.length()) goOn = false; else if (arg.charAt(endPos+1) == '\"') endPos = endPos + 2; else goOn = false; } String temp = arg.substring (1,endPos); results[0] = temp.replaceAll("\"\"", "\""); results[1] = arg.substring (endPos+2); } else { results = arg.split (",", 2); } return results; } 7

public String outAsCVS () { return putInCVSForm(category) + "," + putInCVSForm(itemNumber) + "," + putInCVSForm (descr) + "," + value + "," + bidder + "," + bidAmount; } static public String putInCVSForm (String arg) { String retString = ""; boolean putInQuotes = false; if (arg.contains(",") || arg.contains("\"")) { putInQuotes = true; retString = retString + "\""; } String[] result = arg.split ("\"", -1); retString = retString + result[0]; for (int i = 1; i < result.length; i++) retString = retString + "\"\"" + result[i]; if (putInQuotes) retString = retString + "\""; return retString; } 8

public static void main (String[] args) { Item i1 = new Item("1", "Hello There", 50); System.out.println (i1.outAsCVS()); i1 = new Item("1", "Hello, There", 50); System.out.println (i1.outAsCVS()); i1 = new Item("1", "Hello \" There", 50); System.out.println (i1.outAsCVS()); i1.inFromCVS ("Category 1,1,\"Hello, \"\"The\"\"re\",50,-1,0"); System.out.println ("Category: " + i1.getCategory()); System.out.println (i1.getItemNumber()); System.out.println (i1.getDescr()); System.out.println (i1.getValue()); System.out.println (i1.getBidder()); System.out.println (i1.getBidAmount()); System.out.println (); i1.inFromCVS (",,,,"); System.out.println (i1.getItemNumber()); System.out.println (i1.getDescr()); System.out.println (i1.getValue()); System.out.println (i1.getBidder()); System.out.println (i1.getBidAmount()); } 9

import java.io.*; import java.util.*; import java.util.Map; import java.util.TreeMap; import java.util.Iterator; import java.rmi.*; public interface DataControl extends Remote{ public void readBidders (String filename) throws RemoteException; public void writeBidders (String filename) throws RemoteException; public void readItems (String filename) throws RemoteException; public void writeItems (String filename) throws RemoteException; public Item makeBid (int bnum, String inum, int bamount, boolean noCheck) throws RemoteException; public boolean validateItemNumber (String inum) throws RemoteException; public boolean validateBidderNumber (int bnum) throws RemoteException; public Vector getItemsForBidder (int bidderNum) throws RemoteException; public Vector findBidderNumber (String s) throws RemoteException; public Bidder getBidderRecord (int bnum) throws RemoteException; public boolean updateBidderRecord (Bidder newBidder) throws RemoteException; public int getNextCashierNum () throws RemoteException; } 10

import java.io.*; import java.util.*; import java.util.Map; import java.util.TreeMap; import java.util.Iterator; public class DataControlImpl extends java.rmi.server.UnicastRemoteObject implements DataControl { private SortedMap bidders; private SortedMap items; private int cashierNumber; public DataControlImpl ()throws java.rmi.RemoteException { super(); bidders = Collections.synchronizedSortedMap(new TreeMap () ); items = Collections.synchronizedSortedMap(new TreeMap () ); cashierNumber = 0; } 11

public void readBidders (String filename) throws java.rmi.RemoteException { try { String s1; Bidder b1; BufferedReader br = new BufferedReader (new FileReader (filename)); s1 = br.readLine(); while (s1 != null) { b1 = new Bidder(); b1.inFromCVS(s1); bidders.put ( b1.getBidNumber(), b1); s1 = br.readLine(); } br.close(); } catch ( Exception e ) { e.printStackTrace(); } } 12

public void writeBidders (String filename)throws java.rmi.RemoteException { try { // Set up the output file FileWriter fw = new FileWriter (filename); BufferedWriter bw = new BufferedWriter (fw); PrintWriter pw = new PrintWriter (bw); // for all items in the TreeMap for (Map.Entry e : bidders.entrySet()) pw.println(e.getValue().outAsCVS() ); pw.close(); } catch ( Exception e ) { e.printStackTrace(); } } 13

public void readItems (String filename) throws java.rmi.RemoteException { String s1; Item i1; try { BufferedReader br = new BufferedReader (new FileReader (filename)); s1 = br.readLine(); while (s1 != null) { i1 = new Item(); i1.inFromCVS(s1); items.put ( i1.getItemNumber(), i1); s1 = br.readLine(); } br.close(); } catch ( Exception e ) { e.printStackTrace(); } 14

public void writeItems (String filename) throws java.rmi.RemoteException { try { // Set up the output file FileWriter fw = new FileWriter (filename); BufferedWriter bw = new BufferedWriter (fw); PrintWriter pw = new PrintWriter (bw); // for all items in the TreeMap for (Map.Entry e : items.entrySet()) pw.println(e.getValue().outAsCVS() ); pw.close(); } catch ( Exception e ) { e.printStackTrace(); } 15

public Item makeBid (int bnum, String inum, int bamount, boolean noCheck) throws java.rmi.RemoteException { Item returnItem = new Item(); Item bidItem; if (!items.containsKey (inum)) { // verify item exists returnItem.setCode (-2); // no such item exists return returnItem; } if (!bidders.containsKey (bnum)) {// verify bidder exists returnItem.setCode (-4); // no such bidder exists return returnItem; } bidItem = items.get (inum ); // get item from Item Map if (noCheck == false && bidItem.getBidder() != -1) {// check if a bid has been made returnItem.setCode (-3); // item already has bid returnItem.makeBid (bidItem.getBidder(), bidItem.getBidAmount()); return returnItem; } bidItem.makeBid (bnum, bamount); // store the bid returnItem.setCode (1);// successful bid return returnItem; } 16

public boolean validateItemNumber (String inum) throws java.rmi.RemoteException { if (items.containsKey (inum)) return true; else return false; } public boolean validateBidderNumber (int bnum) throws java.rmi.RemoteException { if (bidders.containsKey (bnum)) return true; else return false; } 17

public Vector getItemsForBidder (int bidderNum) throws java.rmi.RemoteException { Vector itemVector = new Vector (); for (Map.Entry e : items.entrySet()) { if (e.getValue().getBidder() == bidderNum) { itemVector.addElement (e.getValue() ); } } return itemVector; } public Vector findBidderNumber (String s)throws java.rmi.RemoteException { Vector bidderVector = new Vector (); for (Map.Entry e : bidders.entrySet()) { if (e.getValue().getName().toLowerCase().startsWith(s.toLowerCase())) { bidderVector.addElement(e.getValue()); } return bidderVector; } 18

public Bidder getBidderRecord (int bnum) throws java.rmi.RemoteException { if (validateBidderNumber(bnum)) return bidders.get(bnum); else return null; } public boolean updateBidderRecord (Bidder newBidder) throws java.rmi.RemoteException { if (validateBidderNumber(newBidder.getBidNumber())) { bidders.put (newBidder.getBidNumber(), newBidder); return true; } else return false; } public int getNextCashierNum () throws java.rmi.RemoteException { cashierNumber ++; return cashierNumber; } 19

static public void main (String[] args) { try { DataControlImpl dc = new DataControlImpl (); dc.readBidders ("Bidders.csv"); dc.writeBidders ("outBid.txt"); dc.readItems ("Items.csv"); dc.writeItems ("outItem.txt"); } catch (Exception e) { e.printStackTrace(); } } 20

import java.io.*; public class Bidder implements Serializable { private int bidNumber; private String lname; private String fname; private String phone; private int cashAmount; private int checkAmount; private int checkNumber; private int chargeAmount; private int chargeAmount2; private int cashierNum; private int code; public Bidder() { bidNumber = -1; lname = ""; fname = ""; phone = ""; cashAmount = 0; checkAmount = 0; checkNumber = -1; chargeAmount = 0; chargeAmount2 = 0; cashierNum = 0; code = 0; } public Bidder(int num, String pName) { bidNumber = num; lname = pName; fname = ""; phone = ""; cashAmount = 0; checkAmount = 0; checkNumber = -1; chargeAmount = 0; chargeAmount2 = 0; cashierNum = 0; code = 0; } 21

public void setBidNumber(int val) { bidNumber = val; } public int getBidNumber () { return bidNumber; } public void setName (String val) { lname = val; } public String getName () { return lname + ", " + fname; } public void setLName (String val) { lname = val; } public String getLName () { return lname; } public void setFName (String val) { fname = val; } public String getFName () { return fname; } public void setPhone (String val) { phone = val; } public String getPhone () { return phone; } public void setCashAmount (int val) { cashAmount = val; } public int getCashAmount () { return cashAmount; } public void setCheckAmount (int val) { checkAmount = val; } public int getCheckAmount () { return checkAmount; } public void setCheckNumber (int val) { checkNumber = val; } public int getCheckNumber () { return checkNumber; } public void setChargeAmount (int val) { chargeAmount = val; } public int getChargeAmount () { return chargeAmount; } public void setChargeAmount2 (int val) { chargeAmount2 = val; } public int getChargeAmount2 () { return chargeAmount2; } public int getTotalAmount () { return cashAmount + checkAmount + chargeAmount + chargeAmount2; } public void setCode (int val) { code = val; } public int getCode () { return code; } public void setCashier (int val) { cashierNum = val; } public int getCashier () { return cashierNum; } 22

public void inFromCVS ( String arg) { String[] results = getFromCVSForm (arg); try{ bidNumber = Integer.parseInt (results[0]); } catch (NumberFormatException e) { bidNumber = -1; } results = getFromCVSForm (results[1]); lname = results[0]; results = getFromCVSForm (results[1]); fname = results[0]; results = getFromCVSForm (results[1]); phone = results[0]; results = getFromCVSForm (results[1]); try{ cashAmount = Integer.parseInt (results[0]); } catch (NumberFormatException e) { cashAmount = 0; } results = getFromCVSForm (results[1]); try{ checkAmount = Integer.parseInt (results[0]); } catch (NumberFormatException e) { checkAmount = 0; } results = getFromCVSForm (results[1]); try{ checkNumber = Integer.parseInt (results[0]); } catch (NumberFormatException e) { checkNumber = -1; } results = getFromCVSForm (results[1]); try{ chargeAmount = Integer.parseInt (results[0]); } catch (NumberFormatException e) { chargeAmount = 0; } results = getFromCVSForm (results[1]); try{ chargeAmount2 = Integer.parseInt (results[0]); } catch (NumberFormatException e) { hargeAmount2 = 0; } results = getFromCVSForm (results[1]); try{ cashierNum = Integer.parseInt (results[0]); } catch (NumberFormatException e) { cashierNum = 0; } } 23

static public String [] getFromCVSForm (String arg) { String[] results = new String[2]; int endPos; boolean goOn; if (arg.length() == 0) {results[0] = "";results[1] = "";} else if (arg.charAt(0) == '\"') { endPos = 1; goOn = true; while (goOn) { if (arg.charAt(endPos) != '\"') endPos++; else if (endPos+1 >= arg.length()) goOn = false; else if (arg.charAt(endPos+1) == '\"') endPos = endPos + 2; else goOn = false; } String temp = arg.substring (1,endPos); results[0] = temp.replaceAll("\"\"", "\""); results[1] = arg.substring (endPos+2); } else { results = arg.split (",", 2); } return results; } 24

public String outAsCVS () { return "" + bidNumber + "," + putInCVSForm (lname) + "," + putInCVSForm (fname) + "," + putInCVSForm (phone) + "," + cashAmount + "," + checkAmount + "," + checkNumber + "," + chargeAmount + "," + chargeAmount2 + "," + cashierNum; } static public String putInCVSForm (String arg) { String retString = ""; boolean putInQuotes = false; if (arg.contains(",") || arg.contains("\"")) { putInQuotes = true; retString = retString + "\""; } String[] result = arg.split ("\"", -1); retString = retString + result[0]; for (int i = 1; i < result.length; i++) retString = retString + "\"\"" + result[i]; if (putInQuotes) retString = retString + "\""; return (retString); } 25

public static void main (String[] args) { Bidder i1 = new Bidder(1, "Hello There"); System.out.println (i1.outAsCVS()); i1 = new Bidder(1, "Hello, There"); System.out.println (i1.outAsCVS()); i1 = new Bidder(1, "Hello \" There"); System.out.println (i1.outAsCVS()); i1.inFromCVS ("1,\"Hello, \"\"The\"\"re\",50,,,"); i1.inFromCVS ("1,Troy,Pat, ,1,2,3,4,5,6"); System.out.println (i1.getBidNumber()); System.out.println (i1.getName()); System.out.println (i1.getLName()); System.out.println (i1.getFName()); System.out.println (i1.getPhone()); System.out.println (i1.getCashAmount()); System.out.println (i1.getCheckAmount()); System.out.println (i1.getCheckNumber()); System.out.println (i1.getChargeAmount()); System.out.println (i1.getChargeAmount2()); System.out.println (i1.getCashier()); System.out.println (i1.outAsCVS()); } } 26

import java.rmi.*; import java.rmi.server.*; import java.rmi.registry.Registry; import java.rmi.registry.LocateRegistry; import java.net.*; import java.io.*; // imports for GUI import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.io.*; public class AuctionServer extends JFrame implements ActionListener { private DataControlImpl dc; private JButton saveButton; private JButton exitButton; public AuctionServer (DataControlImpl dcParm) { super ("Auction Server Interface"); dc = dcParm; FlowLayout layout = new FlowLayout(); // get content pane and set its layout Container container = getContentPane(); container.setLayout( layout ); // set up the save button saveButton = new JButton ("Save Data to File"); saveButton.addActionListener (this); container.add (saveButton); // set up the exit button exitButton = new JButton ("Shut Down Server"); exitButton.addActionListener (this); container.add (exitButton); setSize( 700, 500 ); setVisible( true ); } 27

// handle button events public void actionPerformed( ActionEvent event ) { if (event.getSource() == saveButton) doSaveData (); else if (event.getSource() == exitButton) doShutDownServer(); } public void doSaveData() { try { String s = (String)JOptionPane.showInputDialog(this,"Enter Filename to Save Bidder Data:\n", "Save Bidder Data",JOptionPane.PLAIN_MESSAGE, null,null, "bidder.csv«); if (s != null) dc.writeBidders(s); s = (String)JOptionPane.showInputDialog( this,"Enter Filename to Save Item Data:\n", "Save Item Data", JOptionPane.PLAIN_MESSAGE, null, null, "item.csv"); if (s != null) dc.writeItems(s); } catch (Exception e) { e.printStackTrace(); } } 28

public void doShutDownServer() { int n = JOptionPane.showConfirmDialog(this, "Would you like to save the data before shutting down the server?", "Shut Down Server", JOptionPane.YES_NO_OPTION); if (n == JOptionPane.YES_OPTION) doSaveData(); n = JOptionPane.showConfirmDialog(this, "Would you really wish to shut down the server?", "Shut Down Server", JOptionPane.YES_NO_OPTION); if (n == JOptionPane.YES_OPTION) System.exit( 0 ); } 29

//This method starts a RMI registry on the local host, if //it does not already exists at the specified port number. private static void startRegistry(int RMIPortNum) throws RemoteException{ try { Registry registry = LocateRegistry.getRegistry(RMIPortNum); registry.list( ); // This call will throw an exception // if the registry does not already exist } catch (RemoteException e) { // No valid registry at that port. Registry registry = LocateRegistry.createRegistry(RMIPortNum); } } // end startRegistry } // end class 30

public static void main(String args[]) { InputStreamReader is = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(is); String portNum, registryURL; try{ int RMIPortNum = 1099; startRegistry(RMIPortNum); // set up the database DataControlImpl dc = new DataControlImpl(); dc.readBidders ("Bidders.csv"); dc.readItems ("Items.csv"); registryURL = "rmi://localhost:" + RMIPortNum + "/AuctionServer"; Naming.rebind(registryURL, dc); System.out.println("Auction Server ready."); AuctionServer application = new AuctionServer(dc); application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } catch (Exception re) {System.out.println("Exception in AuctionServer.main: " + re);} } // end main 31

Client In Eclipse