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  • Configuration of Sonicwall Load Balancing

    - by jacke672
    We installed a Sonicwall NSA 240 appliance and have configured it up for our SSL VPN connection and for load balancing with 2 ADSL lines. Over the past week, I have been testing the load balancing options to optimize the connection speeds for our users - but I've run into the following: Round Robin load balancing is the ideal load balancing setting and it's roughly doubling our throughput- but, when it's active users are unable to access any SSL enabled websites such as banking, web-mail, etc. For this reason, I have been using percentage based balancing as it allows me to enable source and destination IP binding, which doesn't 'break' any secure connections but were left with the slow connection speeds we had before adding the second line. I'm looking for a method in which we can take advantage of the round robin connection speeds while allowing users to access sites with SSL certificates, all while still allowing our remote (vpn) users to connect. Any help would be appreciated. Thanks

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  • How Facebook's Ad Bid System Works

    - by pnongrata
    When you are creating an ad on Facebook, you are provided with a "suggested bid" range (e.g., $0.90 - $2.15 USD). According to this page: The suggested bid range is there to help you pick a maximum bid so your ad will be successful. It’s based on how many other advertisers are competing to show their ad to the same audience as you are. I'm interested in understanding what's actually going on (technically) under the hood here. Say a user logs into Facebook. On the server-side, it the HTTP request that the user's browser sent (as part of the login) is handled, and the server needs to figure out which ad to display back to the user. I assume this is where the "bidding" system comes into play? Say that, based on this user's demographics, and based on the audience targeting that several competing advertisers designed their campaign with, let's pretend that Facebook sees a pool of 20 different ads it could return. How does this bidding system help Facebook determine which of the 20 ads it returns to the client-side? I'm guessing that advertisers who "bid more" get prioritized over those who "bid less". But when does this bidding take place? How often does an advertiser need to re-bid? How long is a bid binding for? Once I understand these usage-related concepts behind ads, it will probably be obvious between which of the following "selection strategies" the backend is using: Round robin Prioritized round robin Randomized (doubtful) History-based MVP-based Thanks to anyone who can help point me in the right direction and explain what these suggested bid systems are and how they work.

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  • ArchBeat Link-o-Rama for 11/29/2011

    - by Bob Rhubart
    Webcast: Introducing Oracle WebLogic Server 12c: Developer Deep Dive December 1, 2011 11am - 12pm PT / 2pm - 3pm ET. Learn how Oracle WebLogic Server 12c enables rapid development of modern, lightweight Java EE 6 applications. Discover how you can leverage the latest development technologies, tools and standards when deploying to Oracle WebLogic Server across both conventional and Cloud environments. Web Services in BI Publisher 11g | Robin Moffatt BI Publisher 11g comes with a shiny set of new Web Services, superseding those that were in 10g. Robin Moffatt's article discusses some of the uses, and ways to implement them. Stanford expands free, online information technology course offerings | ZDNet Joe McKendrick reports on new Stanford online courses set to start in January 2012. Courses include Software as a Service and Computer Science 101. The federal government's secret 1966 cloud computing plan | ZDNet "Even as far back as 45 years ago, the US federal government struggled to consolidate and become more service-oriented across its agency silos," says McKendrick. SOA Made Simple; Architects in AZ; Introduction to Cloud Migration This week on the Oracle Technology Network Architect Home Page. New release of S-ASH v.2.3 | Marcin Przepiorowski A short post from Marcin Przepiorowski on the new version of Oracle Simulate ASH. Architecture all day. Oracle Technology Network Architect Day - Phoenix, AZ Spend the day with your peers learning from Oracle experts on Cloud Computing, Engineered Systems, and more. Wednesday, December 14, 2011. 8:30am to 5:00pm. Registration is free, but seating is limited.

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  • Error Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException [migrated]

    - by user134212
    I'm new here. I'm learning how to program on java and I have a problem with my code. I really have no clue why my code is not working. I think my mistake may be here, but I'm not quite sure. m3 = new Matriz(ren2,col2); btSumar.addActionListener(new ActionListener() { Matriz m3;//(ren2,col2); public void actionPerformed(ActionEvent e) { m3 = new Matriz(ren2,col2); if(ventanaAbierta==true) { try { crearMat.SUMA(m1,m2); } catch(Exception nul) { System.out.println(nul); } } else { JOptionPane.showMessageDialog(null,"Ya se realizo la suma"); } } }); My Complete code import java.awt.*; import javax.swing.*; import javax.swing.BorderFactory; import javax.swing.border.Border; import java.awt.event.*; import java.awt.*; import java.io.*; import java.util.*; public class Practica2 { private int opcion,ren2,col2; private JFrame ventana,ventanaPrintMatriz; private JPanel panel,panel2; private Border borderRed2,borderBlue2,borderGreen2,borderGreen4; private Color red,green,blue,white,black; private Font Verdana14,ArialBlack18; private JLabel labelTitulo; public JButton btSalir,btSumar,btRestar,btMultiplica,btTranspuesta,btCrear; private ImageIcon suma,resta,multi,crear,salir,trans; private boolean ventanaAbierta = false; private static ValidacionesMatrices valida; private static Operaciones operacion; private static Matriz m1,m2,m3; private static ImprimirMatriz printMat; public Practica2() { panel = new JPanel(); panel.setLayout(null); ventana = new JFrame("Operaciones con Matrices"); ventana.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { //Sale del programa System.exit(0); } }); ventana.setContentPane(panel); ventana.setVisible(true); ventana.setResizable(false); ventana.setBounds(150,150,300,380); //ventana.setBounds(0,0,650,650); } public void inicializarComponentes() { panel2 = new JPanel(); panel2.setLayout(null); labelTitulo = new JLabel("Practica #2"); suma = new ImageIcon("suma1.png"); resta = new ImageIcon("resta1.png"); multi = new ImageIcon("multi1.png"); trans = new ImageIcon("trans2.png"); crear = new ImageIcon("crear1.png"); salir = new ImageIcon("salir1.png"); btTranspuesta = new JButton("Transpuesta",trans); btMultiplica = new JButton("Multiplica",multi); btRestar = new JButton("Restar",resta); btSumar = new JButton("Sumar",suma); btCrear = new JButton("Crear",crear); btSalir = new JButton("Salir",salir); //Tipo de letra ArialBlack18 = new Font("Arial Black",Font.BOLD,18); //Color green = new Color(0,255,0); //Formato labelTitulo labelTitulo.setBounds(80,-60,200,150); labelTitulo.setFont(ArialBlack18); labelTitulo.setForeground(blue); labelTitulo.setVisible(true); //Formato de CrearMatriz btCrear.setBounds(80,50,130,30); btCrear.setToolTipText("Crea una matriz"); //Formato de Muliplica btMultiplica.setBounds(80,100,130,30); btMultiplica.setToolTipText("Mat[A] * Mat[B]"); //Formato de botonRestar btRestar.setBounds(80,150,130,30); btRestar.setToolTipText("Mat[A] - Mat[B]"); //Formato del botonSumar btSumar.setBounds(80,200,130,30); btSumar.setToolTipText("Mat[A] + Mat[B]"); //Formato de Transpuesta btTranspuesta.setBounds(80,250,130,30); btTranspuesta.setToolTipText("Mat[A]^-1"); //Formato del botonSalir btSalir.setBounds(80,300,130,30); //Agregando componentes al panel1 panel2.add(labelTitulo); panel2.add(btMultiplica); panel2.add(btCrear); panel2.add(btRestar); panel2.add(btSumar); panel2.add(btSalir); panel2.add(btTranspuesta); //Formato panel2 panel2.setBackground(green); panel2.setVisible(true); panel2.setBounds(0,0,300,380); //Argregamos componentes al panelPrincipal= panel.add(panel2); //BotonCrear btCrear.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) //throws IOException { if(ventanaAbierta==false) { ventanaAbierta=true; new CrearMatriz(); } else { JOptionPane.showMessageDialog(null,"Ya se crearon las Matrices"); } } }); m3 = new Matriz(ren2,col2); btSumar.addActionListener(new ActionListener() { Matriz m3;//(ren2,col2); public void actionPerformed(ActionEvent e) { m3 = new Matriz(ren2,col2); if(ventanaAbierta==true) { try { crearMat.SUMA(m1,m2); } catch(Exception nul) { System.out.println(nul); } } else { JOptionPane.showMessageDialog(null,"Ya se realizo la suma"); } } }); //BotonSalir btSalir.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); panel.setVisible(true); panel.setBounds(0,0,350,380); } class VentanaMatriz { private JFrame ventana; private JPanel panel; private JTextArea textArea1,textArea2; private JLabel mat1,mat2; private JTextField textField1; public VentanaMatriz() { panel = new JPanel(); panel.setLayout(null); ventana = new JFrame("Creacion de Matrices"); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { ventana.dispose(); } }); ventana.setContentPane(panel); ventana.setVisible(true); ventana.setResizable(false); ventana.setBounds(200,100,850,420); } public void inicializarComponentes() { //Colores black = new Color(0,0,0); white = new Color(255,255,255); blue = new Color(0,0,255); green = new Color(0,255,0); red = new Color(255,0,0); //Tipo de letra Verdana14 = new Font("Verdana",Font.BOLD,14); //Tipos de borde borderRed2 = BorderFactory.createLineBorder(red,2); borderBlue2 = BorderFactory.createLineBorder(blue,2); borderGreen2 = BorderFactory.createLineBorder(green,2); borderGreen4 = BorderFactory.createLineBorder(green,4); //Agregando componentes al panel1 panel.add(mat1); panel.add(textArea1); panel.add(mat2); panel.add(textArea2); //Formato panel2 panel.setBackground(blue); panel.setVisible(true); panel.setBounds(0,0,850,420); } } class CrearMatriz { public int col1,re1,ren2,col2; public Matriz m1,m2,m3; public CrearMatriz() { int col1,ren1,ren2,col2; ren2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Renglones Matriz A: ")); col2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Columnas Matriz A: ")); final Matriz m1= new Matriz(ren2,col2); ren2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Renglones Matriz B: ")); col2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Columnas Matriz B: ")); final Matriz m2= new Matriz(ren2,col2); m3 = new Matriz(ren2,col2); m1.llenarMatriz(); m2.llenarMatriz(); m1.printMat(); m2.printMat(); } public void SUMA(Matriz m1,Matriz m2) { Matriz m3; if(ventanaAbierta==false) { m3 = new Matriz(ren2,col2); if(valida.validaSumayResta(m1,m2)) { m3 = operacion.sumaMat(m1,m2); JOptionPane.showMessageDialog(null,"La suma es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la suma"); } } } public void RESTA() { } //btSumar = new JButton("Sumar",suma); //BotonSumar //Mostrar matriz 1 y 2 // System.out.println("\n\n\nMatriz 1="); // m1.imprimeMatriz(); // System.out.println("\nMatriz 2="); //Poner en botones /* if(valida.validaSumayResta(m1,m2)) { m3 = operacion.sumaMat(m1,m2); JOptionPane.showMessageDialog(null,"La suma es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la suma"); } if(valida.validaSumayResta(m1,m2)) { m3=operacion.restaMat(m1,m2); JOptionPane.showMessageDialog(null,"La resta es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la resta"); } if(valida.validaMultiplicacion(m1,m2)){ m3=operacion.multiplicaMat(m1,m2); JOptionPane.showMessageDialog(null,"La multiplicacion es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la multiplicacion"); } JOptionPane.showMessageDialog(null,"La multiplicacion es = "); m1=operacion.transpuesta(m1); m2=operacion.transpuesta(m2); */ } class Matriz { public JTextField matriz; //public JTextArea texto; private JFrame ventanaPrintMatriz; private JPanel panel2; int ren; int col; int pos[][]; public Matriz(int ren1, int col1) { ren = ren1; col = col1; pos = new int [ren][col];/*una matriz de enteros de renglon por columan*/ } public void llenarMatriz() { for(int i=0;i<ren;i++) for(int j=0;j<col;j++) pos[i][j]=(int) (Math.random()*10);/*la posicion i y j crea un entero random*/ } /*vuelve a recorrer los espacio de i y j*/ } //Esta clase era un metodo de CrearMatriz class ImprimirMatriz { public void ImprimirMatriz() { panel2 = new JPanel(); panel2.setLayout(null); ventanaPrintMatriz = new JFrame("Matriz"); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { //Practica2.ventanaAbierta=false; ventana.dispose(); } }); int i,j; int x=0,y=0; borderRed2 = BorderFactory.createLineBorder(red,2); white = new Color(255,255,255); red = new Color(255,0,0); black = new Color(0,0,0); blue = new Color(0,0,255); for(i=0;i<ren;i++) { for(j=0;j<col;j++) { matriz = new JTextField(" "+pos[i][j]); matriz.setBorder(borderRed2); matriz.setForeground(white); matriz.setBounds(x+25,y+25,25,25); matriz.setBackground(black); matriz.setEditable(false); matriz.setVisible(true); //Se incrementa la coordenada en X //para el siguiente Textfield no se encime x=x+35; //Agregamos el textField al panel panel2.add(matriz); } //Regreso las cordenadas de X a 0 para que el //siguiente renglon empieze en donde mismo x=0; //Incremento las coordenada Y para que se brinque //de linea y=y+35; } //Formato panel2 panel2.setBounds(150,150,350,380); panel2.setBackground(blue); //panel2.setEditable(false); panel2.setVisible(true); //Formato de Ventana ventanaPrintMatriz.setContentPane(panel2); ventanaPrintMatriz.setBounds(150,150,350,380); ventanaPrintMatriz.setResizable(false); ventanaPrintMatriz.setVisible(true); } } class Operaciones { public Matriz sumaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m1.col); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[i][j]+m2.pos[i][j]; return m3; } public Matriz restaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m1.col); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[i][j]-m2.pos[i][j]; return m3; } public Matriz multiplicaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m2.col); for(int i=0;i<m1.ren;i++) for(int j=0;j<m2.col;j++) { m3.pos[i][j]=0; for(int k=0;k<m1.col;k++) m3.pos[i][j]+=(m1.pos[i][k]*m2.pos[k][j]); } return m3; } public Matriz transpuesta(Matriz m1) { Matriz m3=new Matriz(m1.col,m1.ren); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[j][i]; return m3; } } class ValidacionesMatrices { public boolean validaSumayResta(Matriz m1, Matriz m2) { if((m1.ren==m2.ren) && (m1.col==m2.col)) return true; else return false; } public boolean validaMultiplicacion(Matriz m1, Matriz m2) { if(((m1.ren==m2.ren) && (m1.col==m2.col)) || (m1.col==m2.ren)) return true; else return false; } } public static void main(String[] args) { Practica2 practica2 = new Practica2(); practica2.inicializarComponentes(); } } Exc

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  • Computer stopped working(ASUS P5GD1-VM)

    - by Gordonrjones
    My computer stopped working the other day, I came down and it was kind of chriping away then when I restarted it it only did the same thing, I unplugged everything not needed and it did nothing at all, I thought maybe powersupply but when I took cover off the green light on MB was on and powersuppy is making little buzz sound, but nothing happens when I turn com on other than the green light on MB flickers a bit, I checked memory in other com and it works fine, love to be able to fix with as litttle cost as possible, hope someone here can help... P4-640 (3.2E GHz, 800 FSB, L2:2MB, EM64T, HT)

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  • Nagios simple dashboard

    - by Thomas
    I am looking for a dead simple dashboard for Nagios so our IT team can view the status of our services. In an old version of what's up gold, it was a nice dashboard with different rectangular shape being red, yellow or green depending on the status of the service and could be display easily on a screen. Is there some copycat dashboard for nagios ? any better recommendation ? I want something you can see from your desk 15meters away: red or green, no need for details.

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  • convert home phone wiring to Ethernet

    - by aaa
    can i convert phone wiring in walls to act as only Ethernet network cause the phone wiring is not in use and not connected to the phone company so there is no voltage in the wires i remove the wall plate and i find 6 wires blue,blue/white,green,green/white,orange,orange/white , and i know that Ethernet use 8 here is what i am thinking get Ethernet cable cut it in half and attach wires from wall to the first computer and the same with the other computer so if this is possible do i just attach wires in the same color and ignore brown wire or do i have to rearrange wires , and how much the speed will be thank you in advance

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  • convert home phone wiring to Ethernet

    - by aaa
    can i convert phone wiring in walls to act as only Ethernet network cause the phone wiring is not in use and not connected to the phone company so there is no voltage in the wires i remove the wall plate and i find 6 wires blue,blue/white,green,green/white,orange,orange/white , and i know that Ethernet use 8 here is what i am thinking get Ethernet cable cut it in half and attach wires from wall to the first computer and the same with the other computer so if this is possible do i just attach wires in the same color and ignore brown wire or do i have to rearrange wires , and how much the speed will be thank you in advance

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  • Sort each standalone line alphabetically

    - by Daniel
    I want to sort some items in alphabetic order, but in a very specifc way. I have, for example, the following list, each item separated by comma: monkeys, dogs, cats pineapple, banana, orange yellow, red, blue, green silver, gold, platinum delphi, java, c++, visual basic I want to sort each line alphabetically, WITHOUT changing line order. My desired result would be: cats, dogs, monkeys banana, orange, pineapple blue, green, red, yellow gold, platinum, silver c++, delphi, java, visual basic My target list has got 3000+ lines, so it should be an automated process. Thanks!

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  • Notepad Merge 2 lines into 1 line

    - by Kalman Mettler
    Sorry for my rough English, I try to visualize my question. I have two lists of words, one per line, each list in a separate file: File 1: white fehér green zöld red piros File 2: white blanco green verde red roja I need to combine these lists, removing any duplicates and create a new file containing the following: fehér blanco zöld verde piros roja I am a newbie with Notepad++ and can't work out this problem.

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  • NSURLSession and amazon S3 uploads

    - by George Green
    I have an app which is currently uploading images to amazon S3. I have been trying to switch it from using NSURLConnection to NSURLSession so that the uploads can continue while the app is in the background! I seem to be hitting a bit of an issue. The NSURLRequest is created and passed to the NSURLSession but amazon sends back a 403 - forbidden response, if I pass the same request to a NSURLConnection it uploads the file perfectly. Here is the code that creates the response: NSString *requestURLString = [NSString stringWithFormat:@"http://%@.%@/%@/%@", BUCKET_NAME, AWS_HOST, DIRECTORY_NAME, filename]; NSURL *requestURL = [NSURL URLWithString:requestURLString]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:60.0]; // Configure request [request setHTTPMethod:@"PUT"]; [request setValue:[NSString stringWithFormat:@"%@.%@", BUCKET_NAME, AWS_HOST] forHTTPHeaderField:@"Host"]; [request setValue:[self formattedDateString] forHTTPHeaderField:@"Date"]; [request setValue:@"public-read" forHTTPHeaderField:@"x-amz-acl"]; [request setHTTPBody:imageData]; And then this signs the response (I think this came from another SO answer): NSString *contentMd5 = [request valueForHTTPHeaderField:@"Content-MD5"]; NSString *contentType = [request valueForHTTPHeaderField:@"Content-Type"]; NSString *timestamp = [request valueForHTTPHeaderField:@"Date"]; if (nil == contentMd5) contentMd5 = @""; if (nil == contentType) contentType = @""; NSMutableString *canonicalizedAmzHeaders = [NSMutableString string]; NSArray *sortedHeaders = [[[request allHTTPHeaderFields] allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]; for (id key in sortedHeaders) { NSString *keyName = [(NSString *)key lowercaseString]; if ([keyName hasPrefix:@"x-amz-"]){ [canonicalizedAmzHeaders appendFormat:@"%@:%@\n", keyName, [request valueForHTTPHeaderField:(NSString *)key]]; } } NSString *bucket = @""; NSString *path = request.URL.path; NSString *query = request.URL.query; NSString *host = [request valueForHTTPHeaderField:@"Host"]; if (![host isEqualToString:@"s3.amazonaws.com"]) { bucket = [host substringToIndex:[host rangeOfString:@".s3.amazonaws.com"].location]; } NSString* canonicalizedResource; if (nil == path || path.length < 1) { if ( nil == bucket || bucket.length < 1 ) { canonicalizedResource = @"/"; } else { canonicalizedResource = [NSString stringWithFormat:@"/%@/", bucket]; } } else { canonicalizedResource = [NSString stringWithFormat:@"/%@%@", bucket, path]; } if (query != nil && [query length] > 0) { canonicalizedResource = [canonicalizedResource stringByAppendingFormat:@"?%@", query]; } NSString* stringToSign = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n%@%@", [request HTTPMethod], contentMd5, contentType, timestamp, canonicalizedAmzHeaders, canonicalizedResource]; NSString *signature = [self signatureForString:stringToSign]; [request setValue:[NSString stringWithFormat:@"AWS %@:%@", self.S3AccessKey, signature] forHTTPHeaderField:@"Authorization"]; Then if I use this line of code: [NSURLConnection connectionWithRequest:request delegate:self]; It works and uploads the file, but if I use: NSURLSessionUploadTask *task = [self.session uploadTaskWithRequest:request fromFile:[NSURL fileURLWithPath:filePath]]; [task resume]; I get the forbidden error..!? Has anyone tried uploading to S3 with this and hit similar issues? I wonder if it is to do with the way the session pauses and resumes uploads, or it is doing something funny to the request..? One possible solution would be to upload the file to an interim server that I control and have that forward it to S3 when it is complete... but this is clearly not an ideal solution! Any help is much appreciated!! Thanks!

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  • [Java] RSA BadPaddingException : data must start with zero

    - by Robin Monjo
    Hello everyone. I try to implement an RSA algorithm in a Java program. I am facing the "BadPaddingException : data must start with zero". Here are the methods used to encrypt and decrypt my data : public byte[] encrypt(byte[] input) throws Exception { Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");// cipher.init(Cipher.ENCRYPT_MODE, this.publicKey); return cipher.doFinal(input); } public byte[] decrypt(byte[] input) throws Exception { Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");/// cipher.init(Cipher.DECRYPT_MODE, this.privateKey); return cipher.doFinal(input); } privateKey and publicKey attributes are read from files this way : public PrivateKey readPrivKeyFromFile(String keyFileName) throws IOException { PrivateKey key = null; try { FileInputStream fin = new FileInputStream(keyFileName); ObjectInputStream ois = new ObjectInputStream(fin); BigInteger m = (BigInteger) ois.readObject(); BigInteger e = (BigInteger) ois.readObject(); RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m, e); KeyFactory fact = KeyFactory.getInstance("RSA"); key = fact.generatePrivate(keySpec); ois.close(); } catch (Exception e) { e.printStackTrace(); } return key; } Private key and Public key are created this way : public void Initialize() throws Exception { KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA"); keygen.initialize(2048); keyPair = keygen.generateKeyPair(); KeyFactory fact = KeyFactory.getInstance("RSA"); RSAPublicKeySpec pub = fact.getKeySpec(keyPair.getPublic(), RSAPublicKeySpec.class); RSAPrivateKeySpec priv = fact.getKeySpec(keyPair.getPrivate(), RSAPrivateKeySpec.class); saveToFile("public.key", pub.getModulus(), pub.getPublicExponent()); saveToFile("private.key", priv.getModulus(), priv.getPrivateExponent()); } and then saved in files : public void saveToFile(String fileName, BigInteger mod, BigInteger exp) throws IOException { FileOutputStream f = new FileOutputStream(fileName); ObjectOutputStream oos = new ObjectOutputStream(f); oos.writeObject(mod); oos.writeObject(exp); oos.close(); } I can't figured out how the problem come from. Any help would be appreciate ! Thanks in advance.

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  • Backtracking Problem

    - by Joshua Green
    Could someone please guide me through backtracking in Prolog-C using the simple example below? Here is my Prolog file: likes( john, mary ). likes( john, emma ). likes( john, ashley ). Here is my C file: #include... term_t tx; term_t tv; term_t goal_term; functor_t goal_functor; int main( int argc, char** argv ) { argv[0] = "libpl.dll"; PL_initialise( argc, argv ); PlCall( "consult( swi( 'plwin.rc' ) )" ); PlCall( "consult( 'likes.pl' )" ); tv = PL_new_term_ref( ); PL_put_atom_chars( tv, "john" ); tx = PL_new_term_ref( ); goal_term = PL_new_term_ref( ); goal_functor = PL_new_functor( PL_new_atom( "likes" ), 2 ); PL_cons_functor( goal_term, goal_functor, tv, tx ); PlQuery q( "likes", ??? ); while ( q.next_solution( ) ) { char* solution; PL_get_atom_chars( tx, &solution ); cout << solution << endl; } PL_halt( PL_toplevel() ? 0 : 1 ); } What should I replace ??? with? Or is this the right approach to get all the backtracking results generated and printed? Thank you,

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  • error A2070: invalid instruction operands IN SSE MASM64

    - by Green
    when compiling this in ml64.exe 64bit (masm64) the SSE command give me an error what do i need to do to include the SSE commands in 64 bit? .code test PROC movlps [rdx], xmm7 ;;error A2070: invalid instruction operands ;//Inc in vec ptr add rsi, 16 movhlps xmm6, xmm7 movss [rdx+8], xmm6 ;;rror A2070: invalid instruction operands ret test ENDP end i get the error: 1>Performing Custom Build Step 1> Assembling: extasm.asm 1>extasm.asm(6) : error A2070: invalid instruction operands 1>extasm.asm(10) : error A2070: invalid instruction operands 1>Microsoft (R) Macro Assembler (x64) Version 8.00.50727.215 1>Copyright (C) Microsoft Corporation. All rights reserved. 1>Project : error PRJ0019: A tool returned an error code from "Performing Custom Build Step"

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  • Problem Registering a Generic Repository with Windsor IoC

    - by Robin
    I’m fairly new to IoC and perhaps my understanding of generics and inheritance is not strong enough for what I’m trying to do. You might find this to be a mess. I have a generic Repository base class: public class Repository<TEntity> where TEntity : class, IEntity { private Table<TEntity> EntityTable; private string _connectionString; private string _userName; public string UserName { get { return _userName; } set { _userName = value; } } public Repository() {} public Repository(string connectionString) { _connectionString = connectionString; EntityTable = (new DataContext(connectionString)).GetTable<TEntity>(); } public Repository(string connectionString, string userName) { _connectionString = connectionString; _userName = userName; EntityTable = (new DataContext(connectionString)).GetTable<TEntity>(); } // Data access methods ... ... } and a SqlClientRepository that inherits Repository: public class SqlClientRepository : Repository<Client> { private Table<Client> ClientTable; private string _connectionString; private string _userName; public SqlClientRepository() {} public SqlClientRepository(string connectionString) : base(connectionString) { _connectionString = connectionString; ClientTable = (new DataContext(connectionString)).GetTable<Client>(); } public SqlClientRepository(string connectionString, string userName) : base(connectionString, userName) { _connectionString = connectionString; _userName = userName; ClientTable = (new DataContext(connectionString)).GetTable<Client>(); } // data access methods unique to Client repository ... } The Repository class provides some generics methods like Save, Delete, etc, that I want all my repository derived classes to share. The TEntity parameter is constrained to the IEntity interface: public interface IEntity { int Id { get; set; } NameValueCollection GetSaveRuleViolations(); NameValueCollection GetDeleteRuleViolations(); } This allows the Repository class to reference these methods within its Save and Delete methods. Unit tests work fine on mock SqlClientRepository instances as well as live unit tests on the real database. However, in the MVC context: public class ClientController : Controller { private SqlClientRepository _clientRepository; public ClientController(SqlClientRepository clientRepository) { this._clientRepository = clientRepository; } public ClientController() { } // ViewResult methods ... ... } ... _clientRepository is always null. I’m using Windor Castle as an IoC container. Here is the configuration: <component id="ClientRepository" service="DomainModel.Concrete.Repository`1[[DomainModel.Entities.Client, DomainModel]], DomainModel" type="DomainModel.Concrete.SqlClientRepository, DomainModel" lifestyle="PerWebRequest"> <parameters> <connectionString>#{myConnStr}</connectionString> </parameters> </component> I’ve tried many variations in the Windsor configuration file. I suspect it’s more of a design flaw in the above code. As I'm looking over my code, it occurs to me that when registering components with an IoC container, perhaps service must always be an interface. Could this be it? Does anybody have a suggestion? Thanks in advance.

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  • CSS How to apply child:hover but not parent:hover

    - by CNelson
    With the following html, when I hover over child, I get a green background on parent. How can I stop that from happening? I do want the green background if I am hovering outside of the child element. CSS3 is fine. <style> .parent { padding: 100px; width: 400px; height:400px; } .parent:hover { background-color: green; } .child { padding: 100px; width: 200px; height:200px; } .child:hover { background-color: blue; } </style> <div class="parent"> <div class="child">Child</div> </div>

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  • Simple way to return anonymous types (to make MVC using LINQ possible)

    - by BlueRaja The Green Unicorn
    I'd like to implement MVC while using LINQ (specifically, LINQ-to-entities). The way I would do this is have the Controller generate (or call something which generates) the result-set using LINQ, then return that to the View to display the data. The problem is, if I do: return (from o in myTable select o); All the columns are read from the database, even the ones (potentially dozens) I don't want. And - more importantly - I can't do something like this: return (from o in myTable select new { o.column }); because there is no way to make anonymous types type-safe! I know for sure there is no nice, clean way of doing this in 3.5 (this is not clean...), but what about 4.0? Is there anything planned, or even proposed? Without something like duck-typing-for-LINQ, or type-safe anonymous return values (it seems to me the compiler should certainly be capable of that), it appears to be nearly impossible to cleanly separate the Controller from the View.

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  • How to make tooltip move with mouse (winforms)

    - by BlueRaja The Green Unicorn
    I want it to move when the mouse moves, and disappear when the pointer isn't over the label. This doesn't work: private void lblRevisionQuestion_MouseMove(object sender, MouseEventArgs e) { toolTip1.Show("test", this, PointToClient(MousePosition), Int32.MaxValue); } private void lblRevisionQuestion_MouseLeave(object sender, EventArgs e) { toolTip1.Hide(this); } As soon as the tooltip appears, it steals focus away from the form, evoking MouseLeave. Then the tooltip hides, and the pointer is once again over the label, invoking MouseMove. This results in a choppy, flashing tooltip. Is there any way to do this?

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  • What does your ~/.gitconfig contain?

    - by Rajkumar S
    Hi, I am looking to pimp up my ~/.gitconfig to make it really beautiful and take maximum advantage of capabilities git can offer. My current ~/.gitconfig is below, what more would you add? Have some nice ~/.gitconfig you want to share? Any recommendations for merge and diff tools in linux? Post away and let's build a nice ~/.gitconfig [user] name = Rajkumar email = [email protected] [color] diff = auto status = auto branch = auto interactive = auto ui = true pager = true [color "branch"] current = yellow reverse local = yellow remote = green [color "diff"] meta = yellow bold frag = magenta bold old = red bold new = green bold [color "status"] added = yellow changed = green untracked = cyan [core] pager = less -FRSX whitespace=fix,-indent-with-non-tab,trailing-space,cr-at-eol [alias] co = checkout Thanks! raj

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  • DataTables - Remove DataTables from HTML Table created in different JavaScript File

    - by Matt Green
    So I have a site I visit everyday for work. The DataTables implementation on this site is atrocious. The DataTable is applied to an HTML table that is generated when the page is rendered and then the DataTable is initialized on it. I figured this is great because I can create a little TamperMonkey script to remove the horrible DataTable and create one that functions how I need it to. The DataTable is created via inline Javascript at the end of the document body. I tried the following per the DOCs for the destory() method. // ==UserScript== // @name // @version 0.1 // @description Makes the Invoice Table more user friendly // @include URL // @require http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js // @require http://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.1/js/jquery.dataTables.min.js // @copyright 2014+, Me // ==/UserScript== $(function() { var t = $('#customer_invoices').DataTable(); t.destroy(); }); It does not "remove those enhancements and return the table to its original un-enhanced state, with the data shown in the table" as stated in the docs. It does not appear to do anything. I think it is either because the table has not been Datatable initialized yet, or that I am not able to access the original DataTable initialization in a different scope. Any help is greatly appreciated as this has me banging my head on the desk.

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  • Implement a RSA algorithm in Java

    - by Robin Monjo
    Hello everyone. I want to implement a RSA algorithm to encrypt an image (byte[]). To generate my two keys I used this piece of code : KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA"); keygen.initialize(512); keyPair = keygen.generateKeyPair(); Once public and private key are generated, I would like to show them to the user so he can distribute the public key and use the private key to decode. How can I get back those key? Using keygen.getPrivateKey() and keygen.getPublicKey() give me all the information of the RSA algorithm, not only the keys I need. Thanks

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  • Class Problem (c++ and prolog)

    - by Joshua Green
    I am using the C++ interface to Prolog (the classes and methods of SWI-cpp.h). For working out a simple backtracking that john likes mary and emma and sara: likes(john, mary). likes(john, emma). likes(john, ashley). I can just do: { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } This works in a separate code, so the syntax is correct. But I am also trying to get this simple backtracking to work within a class: class UserTaskProlog { public: UserTaskProlog(ArRobot* r); ~UserTaskProlog(); protected: int cycles; char* argv[1]; ArRobot* robot; void logTask(); }; This class works fine, with my cycles variable incrementing every robot cycle. However, when I run my main code, I get an Unhandled Exception error message: UserTaskProlog::UserTaskProlog(ArRobot* r) : robotTaskFunc(this, &UserTaskProlog::logTask) { cycles = 0; PlEngine e(argv[0]); PlCall("consult('myFile.pl')"); robot->addSensorInterpTask("UserTaskProlog", 50, &robotTaskFunc); } UserTaskProlog::~UserTaskProlog() { robot->remSensorInterpTask(&robotTaskFunc); // Do I need a destructor here for pl? } void UserTaskProlog::logTask() { cycles++; cout << cycles; { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } } I have my opening and closing brackets for PlFrame. I have my frame, my query, etc... The exact same code that backtracks and prints out mary and emma and sara. What am I missing here that I get an error message? Here is what I think the code should do: I expect mary and emma and sara to be printed out once, every time cycles increments. However, it opens SWI-cpp.h file automatically and points to class PlFrame. What is it trying to tell me? I don't see anything wrong with my PlFrame class declaration. Thanks,

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