Simple Interactive exam engine using Java

Hi all,
I am trying to develop a new interactive quiz engine using Java. I am new to the java programming. Is there any place where I can download the source code to refer? Any help would be greatly appreciated

javabegin wrote:
I am trying to develop a new interactive quiz engine using Java. I am new to the java programming. Is there any place where I can download the source code to refer? Any help would be greatly appreciatedThis is somewhat a strange request, and one that is short on details. What are you looking for? Command line or GUI? If GUI, Swing? AWT? SWT? or completely different platform? Database based or not? Or is this a class assignment? Have you searched the forum? google?

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How to interact with google search engine using java HTTP POST

I am trying to develop an desktop app that acts as an online radio tuner. I want to use google as an index site for actually searching for radio stations online. So I was wandering if it is possible for me to use java to actually interface with the google search engine servers. For example, I have built a gui that allows you to enter search text. This gui will connect to the web. I would like it to connect to the Google site and post the query to the google web servers. Then i would like to began to parse the response( html page) that i get back from the google servers. Like using google without actually typing in the text field on the google site. Can anyone tell me if it is possible to do this with java. If so, what would be the best way to go about doing this. Thanks.

Thanks for the response. It was actually alot easier to do than I anticipated. All I had to do was create a URL object initialized with the google url(search text embedded in the url - http://www.google.com/search?q=" + searchText + "&hl=en&ie=UTF-8&oe=UTF8).
Looks like this:
String google = http://www.google.com/search?q=" + searchText + "&hl=en&ie=UTF-8&oe=UTF8;
URL url = new URL(google); // creating Google Url object
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Fuzzy Engine Using Java

Hi all. I'm trying to make a fuzzy engine for Java, and I hope you can try it. should there be any trouble/bug,please don't hesitate to ask me.thx^^
Features:
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Link:
[Download Here|http://geekandphilosophy.blogspot.com/2010/06/fuzzy-engine-for-gaming-using-java.html]

Could any body in the hood aid me with links or
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Error when invoking Rule Engine using Java API

Hi,
I have implemented a Java class which calls the Rule Engine to execute the rules. If I test by setting the value of the input inside a main method and get the output, it is working fine. The ruleset is also invoked and there is no problem. However, when I expose this java class as a web service and invoke the web service, I get the below error. I dont get the error if the .rules file is not present in the loaction mentioned. I get the error when the .rules file is present in the location. Not sure if this is an issue with the java call outs or loading the dictionary.
Error:_
<faultcode>S:Server</faultcode>
<faultstring>oracle/rules/sdk2/exception/SDKException</faultstring>
<ns2:exception xmlns:ns2="http://jax-ws.dev.java.net/" note="To disable this feature, set com.sun.xml.ws.fault.SOAPFaultBuilder.disableCaptureStackTrace system property to false" class="java.lang.NoClassDefFoundError">
<message>oracle/rules/sdk2/exception/SDKException</message>
<ns2:stackTrace>
<ns2:frame line="38" file="ImplementRules.java" method="Query" class="oracle.rules.querystudentcriteria.ImplementRules"/>
<ns2:frame line="native" file="NativeMethodAccessorImpl.java" method="invoke0" class="sun.reflect.NativeMethodAccessorImpl"/>
<ns2:frame line="39" file="NativeMethodAccessorImpl.java" method="invoke" class="sun.reflect.NativeMethodAccessorImpl"/>
<ns2:frame line="25" file="DelegatingMethodAccessorImpl.java" method="invoke" class="sun.reflect.DelegatingMethodAccessorImpl"/>
<ns2:frame line="597" file="Method.java" method="invoke" class="java.lang.reflect.Method"/>
<ns2:frame line="101" file="WLSInstanceResolver.java" method="invoke" class="weblogic.wsee.jaxws.WLSInstanceResolver$WLSInvoker"/>
<ns2:frame line="83" file="WLSInstanceResolver.java" method="invoke" class="weblogic.wsee.jaxws.WLSInstanceResolver$WLSInvoker"/>
<ns2:frame line="152" file="InvokerTube.java" method="invoke" class="com.sun.xml.ws.server.InvokerTube$2"/>
<ns2:frame line="264" file="EndpointMethodHandler.java" method="invoke" class="com.sun.xml.ws.server.sei.EndpointMethodHandler"/>
<ns2:frame line="93" file="SEIInvokerTube.java" method="processRequest" class="com.sun.xml.ws.server.sei.SEIInvokerTube"/>
<ns2:frame line="604" file="Fiber.java" method="__doRun" class="com.sun.xml.ws.api.pipe.Fiber"/>
<ns2:frame line="563" file="Fiber.java" method="_doRun" class="com.sun.xml.ws.api.pipe.Fiber"/>
<ns2:frame line="548" file="Fiber.java" method="doRun" class="com.sun.xml.ws.api.pipe.Fiber"/>
<ns2:frame line="445" file="Fiber.java" method="runSync" class="com.sun.xml.ws.api.pipe.Fiber"/>
<ns2:frame line="275" file="WSEndpointImpl.java" method="process" class="com.sun.xml.ws.server.WSEndpointImpl$2"/>
<ns2:frame line="454" file="HttpAdapter.java" method="handle" class="com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit"/>
<ns2:frame line="250" file="HttpAdapter.java" method="handle" class="com.sun.xml.ws.transport.http.HttpAdapter"/>
<ns2:frame line="140" file="ServletAdapter.java" method="handle" class="com.sun.xml.ws.transport.http.servlet.ServletAdapter"/>
<ns2:frame line="319" file="HttpServletAdapter.java" method="run" class="weblogic.wsee.jaxws.HttpServletAdapter$AuthorizedInvoke"/>
<ns2:frame line="232" file="HttpServletAdapter.java" method="post" class="weblogic.wsee.jaxws.HttpServletAdapter"/>
<ns2:frame line="310" file="JAXWSServlet.java" method="doPost" class="weblogic.wsee.jaxws.JAXWSServlet"/>
<ns2:frame line="727" file="HttpServlet.java" method="service" class="javax.servlet.http.HttpServlet"/>
<ns2:frame line="87" file="JAXWSServlet.java" method="service" class="weblogic.wsee.jaxws.JAXWSServlet"/>
<ns2:frame line="820" file="HttpServlet.java" method="service" class="javax.servlet.http.HttpServlet"/>
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<ns2:frame line="292" file="ServletStubImpl.java" method="execute" class="weblogic.servlet.internal.ServletStubImpl"/>
<ns2:frame line="26" file="TailFilter.java" method="doFilter" class="weblogic.servlet.internal.TailFilter"/>
<ns2:frame line="56" file="FilterChainImpl.java" method="doFilter" class="weblogic.servlet.internal.FilterChainImpl"/>
<ns2:frame line="326" file="DMSServletFilter.java" method="doFilter" class="oracle.dms.wls.DMSServletFilter"/>
<ns2:frame line="56" file="FilterChainImpl.java" method="doFilter" class="weblogic.servlet.internal.FilterChainImpl"/>
<ns2:frame line="3592" file="WebAppServletContext.java" method="run" class="weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction"/>
<ns2:frame line="321" file="AuthenticatedSubject.java" method="doAs" class="weblogic.security.acl.internal.AuthenticatedSubject"/>
<ns2:frame line="121" file="SecurityManager.java" method="runAs" class="weblogic.security.service.SecurityManager"/>
<ns2:frame line="2202" file="WebAppServletContext.java" method="securedExecute" class="weblogic.servlet.internal.WebAppServletContext"/>
<ns2:frame line="2108" file="WebAppServletContext.java" method="execute" class="weblogic.servlet.internal.WebAppServletContext"/>
<ns2:frame line="1432" file="ServletRequestImpl.java" method="run" class="weblogic.servlet.internal.ServletRequestImpl"/>
<ns2:frame line="201" file="ExecuteThread.java" method="execute" class="weblogic.work.ExecuteThread"/>
<ns2:frame line="173" file="ExecuteThread.java" method="run" class="weblogic.work.ExecuteThread"/>
</ns2:stackTrace>
The Java class looks like:
public PersonType Query (PersonType p)
try {
//FileReader reader = new FileReader("/home/orasoa/223345/STRS1.rules");
//FileReader reader = new FileReader("D:\\Arun\\NGCE_WS\\POC1\\UHG\\QueryStudentCriteria\\oracle\\rules\\querystudentcriteria\\STRS1.rules");
InputStream stream=ImplementRules.class.getResourceAsStream("/STRS1.rules");
Reader reader=new InputStreamReader(stream);
RuleDictionary dict = RuleDictionary.readDictionary(reader, new DecisionPointDictionaryFinder(null));
List<SDKWarning> warnings = new ArrayList<SDKWarning>();
dict.update(warnings);
DecisionPoint decisionPoint = new DecisionPointBuilder().with("STRS1_DecisionService_1").with(dict).build();
DecisionPointInstance point = decisionPoint.getInstance();
ArrayList input=new ArrayList();
input.add(p);
point.setInputs(input);
List<Object> output=point.invoke();
catch (Exception e) {}
return p;
Cheers,
- AR

Hi, I am getting a similar error when I deploy my application on the weblogic server.
Could you detail how this was resolved?
Thanks,
SB

When is too simple, reasoning not to use Java?

I wish to write a small program which gives the user 6 or 7 options. When the associated radio button is selected, a different executable file will be executed.
Is this overkill to script this with Java? Should I be simply writing a batch file for this operation?
Advice please.

I wish to write a small program which gives the user
6 or 7 options. When the associated radio button is
selected, a different executable file will be
executed.Sounds fine.
>
Is this overkill to script this with Java? Should I
be simply writing a batch file for this operation?Depends on which you know best, which technology will let you get it done fastest, and who's going to maintain it after you're done with it. AND which would be the most short-term fun.
If "batch" means Windows scripting language, I'd say that's a poor choice.
Who really cares? A small app like that won't be hurt much by using a solution that's less than optimal.
%

Socket example using Java 5

Last year I posted 4 programs that provided a simple client server using both stream sockets and NIO. I decided as an exercise in using Java 5 to port that code and try to use as many of the new features as possible. The following code is very long and does what all the previous example programs did. In replies do not repost the whole of this message.
It provides a simple chat like client and server. The user can request either a stream connection or a NIO connection or provide one of their own.
//========================== MsgSwitch.java ===========================//
package pkwnet.msgswitch;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.logging.Handler;
* main class for message switch
* command line arguments are
* -p port number for server
* -s run server
* -a server ip address including port for client
* -i idle timer in seconds
* -n use NIO
* -c specify connection class
public class MsgSwitch {
    static private int errors = 0;
    static private String address = "127.0.0.1:6060";
    static private String connectionClass = "pkwnet.msgswitch.StreamConnection";
    static public void main(String [] args) {
        int port = 6060;
        int idleTime = 600;
        boolean server = false;
        boolean nio = false;
        Logger logger = Logger.getLogger("msgswitch");
        for(String arg : args) {
            if(arg.startsWith("-a")) {
                address = arg.substring(2);
            } else if(arg.startsWith("-p")) {
                port = argToInt(arg);
                server = true;
            } else if(arg.startsWith("-i")) {
                idleTime = argToInt(arg);
            } else if (arg.startsWith("-s")) {
                server = true;
            } else if (arg.startsWith("-c")) {
                connectionClass = arg.substring(2);
            } else if (arg.startsWith("-n")) {
                connectionClass = "pkwnet.msgswitch.NIOConnection";
            } else {
                String err = "unknown argument=" + arg;
                logger.severe(err);
                System.err.println(err);
                errors++;
        if (errors == 0) {
            if (server) {
                new Server().listen(port,idleTime, nio);
            } else {
                new Client().start(address, nio);
        } else {
            fail(errors + " errors encountered", null);
    static private int argToInt(String arg) {
        int val = 0;
        try {
            val = Integer.parseInt(arg.substring(2));
        } catch (NumberFormatException e) {
            String err = "invalid argument format: " + arg;
            Logger.getLogger("msgswitch").severe(err);
            System.err.println(err);
            errors++;
        return val;
    static public void fail(String err, Throwable e) {
        String msg = "Operation terminated: " + err;
        Logger.getLogger("msgswitch").log(Level.SEVERE, msg, e);
        System.err.println(msg);
        System.exit(12);
    static public Connection getConnection() {
        Connection conn = null;
        try {
            conn = (Connection) Class.forName(connectionClass).newInstance();
        } catch (Exception e) {
            fail ("connection class error", e);
        return conn;
    static public void logCaller(Logger logger, Level level) {
        String text = "CALLED";
        if (logger.isLoggable(level)) {
            try {
                throw new Exception("logging stack");
            } catch (Exception e) {
                StackTraceElement [] st = e.getStackTrace();
                if (st.length > 1) {
                    text += formatElement(st[1]);
                if (st.length >2) {
                    text += formatElement(st[2]);
            logger.log(level, text);
    static private String formatElement(StackTraceElement ste) {
        return "\n    " + ste.getClassName() + "." + ste.getMethodName()
            + "(" + ste.getFileName() + ":" + ste.getLineNumber() + ")";
//================= Client.java =============================================//
package pkwnet.msgswitch;
* a simple Swing chat GUI using Java 5 and sockets.
* @author PKWooster
* @version 1.0 August 31,2005
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JMenu;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JDialog;
import javax.swing.SwingUtilities;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.BorderLayout;
import static java.awt.BorderLayout.*;
client GUI class
public class Client extends JFrame implements ConnectionListener {
     // swing GUI components
     private JTextField userText = new JTextField(40);
     private JTextArea sessionLog = new JTextArea(24,40);
     private JTextField statusText = new JTextField(40);
     private JPanel outPanel = new JPanel();
     private JScrollPane sessionLogScroll = new JScrollPane(sessionLog);
     private JMenuBar menuBar = new JMenuBar();
     private JMenuItem startItem = new JMenuItem("Start");
     private JMenuItem hostItem = new JMenuItem("Host");
     private JMenuItem aboutItem = new JMenuItem("About");
     private JMenuItem abortItem = new JMenuItem("Abort");
     private JMenuItem exitItem = new JMenuItem("Exit");
     private JMenu fileMenu = new JMenu("File");
     private JMenu helpMenu = new JMenu("Help");
     private Container cp;
     private String address;
    private Connection connection;
    private boolean sendReady = false;
    private boolean nio = false;
     Client() {
    public void start(String address, boolean nio) {
        this.address = address;
        this.nio = nio;
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                runClient();
    private void runClient() {
        connection = MsgSwitch.getConnection();
        connection.addConnectionListener(this);
          buildMenu();
          cp = getContentPane();
          sessionLog.setEditable(false);
          outPanel.add(new JLabel("Send: "));
          outPanel.add(userText);
          // enter on userText causes transmit
          userText.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent evt){userTyped(evt);}
          cp.setLayout(new BorderLayout());
          cp.add(outPanel,NORTH);
          cp.add(sessionLogScroll,CENTER);
          cp.add(statusText,SOUTH);
          setStatus("Closed");
          addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent evt) {
                mnuExit();
          pack();
        setVisible(true);
* attempt to send the contents of the user text field
    private void userTyped(ActionEvent evt) {
        if (sendReady) {
            String txt = evt.getActionCommand()+"\n";
            userText.setText("");
            toSessionLog("> ", txt);
            sendReady = false;
            connection.send(txt);
* append text to the session log
     private void toSessionLog(String prefix, String txt) {
          sessionLog.append(prefix + txt);
          sessionLog.setCaretPosition(sessionLog.getDocument().getLength() ); // force last line visible
* build the standard menu bar
     private void buildMenu()
          JMenuItem item;
          // file menu
          startItem.addActionListener(new ActionListener()
          {public void actionPerformed(ActionEvent e){mnuStart();}});
          fileMenu.add(startItem);
          hostItem.addActionListener(new ActionListener()
          {public void actionPerformed(ActionEvent e){mnuHost();}});
          fileMenu.add(hostItem);
          exitItem.addActionListener(new ActionListener()
          {public void actionPerformed(ActionEvent e){mnuExit();}});
          fileMenu.add(exitItem);
          menuBar.add(fileMenu);
          helpMenu.add(aboutItem);
          aboutItem.addActionListener(new ActionListener()
          {public void actionPerformed(ActionEvent e){mnuAbout();}});
          menuBar.add(helpMenu);
          setJMenuBar(menuBar);
* start and stop communications from start menu
     private void mnuStart() {
        if(connection.getState() == Connection.State.CLOSED) {
            connection.connect(address);
        } else {
            connection.disconnect();
* prompt user for host in form address:port
    private void mnuHost() {
          String txt = JOptionPane.showInputDialog("Enter host address:port", connection.getAddress());
          if (txt == null)return;
        address = txt;
     private void mnuAbout() {
          JDialog dialog = new JDialog(this, "About Client");
          JTextField text = new JTextField("Simple character client");
        dialog.getContentPane().add(text);
        dialog.pack();
        dialog.setVisible(true);
     // exit menu
     private void mnuExit() {
        exit();
    private void exit() {
          connection.disconnect();
          System.exit(0);
     private void setStatus(String st) {
        statusText.setText(st);
     private void setStatus(Connection.State state) {
        switch(state) {
            case OPENED:
                startItem.setText("Stop");
                setStatus("Connected to "+address);
                break;
            case CLOSED:
                startItem.setText("Start");
                setStatus("Disconnected");
                break;
            case OPENING:
                setStatus("Connecting to "+address);
                startItem.setText("Abort");
                break;
            case CLOSING:
                setStatus("Disconnecting from "+address);
                startItem.setText("Abort");
                break;
    public void stateChanged(final ConnectionEvent event) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                setStatus(event.getState());
    public void dataAvailable(final ConnectionEvent event) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                setStatus(event.getState());
                String txt = event.getData();
                if (txt == null) {
                    txt = "$null$";
                toSessionLog("< ", txt + "\n");
    public void sendAllowed(final ConnectionEvent event) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                setStatus(event.getState());
                sendReady = true;
    public void accept(ConnectionEvent event) {
//========================== Server.java ===============================//
package pkwnet.msgswitch;
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
* a simple message switch using stream based socket i/o
* a very simple text message switching program
* user commands start with $ and consist of blank seperated arguments
* other lines sent by the user are forwarded
* $on nickname targets
*    sign on as nickname, sending to targets
* $to targets
*    change target list, reports current value
* $list nicknames
*    list status of specified nicknames
* $list
*    list all connected users
* $off
*    sign off
* @author PKWooster
* @version 1.0 September 1, 2005
public class Server {
    private ConcurrentHashMap<String, User> perUser = new ConcurrentHashMap<String,User>();
    private Timer idleTimer;
    private Connection conn;
    public void listen(int port, final int idleTime, boolean nio) {
        idleTimer = new Timer();
        idleTimer.scheduleAtFixedRate(new TimerTask(){public void run(){oneSec();}},0,1000);
        conn = MsgSwitch.getConnection();
        conn.addConnectionListener(new ConnectionListener() {
            public void stateChanged(ConnectionEvent event) {
            public void dataAvailable(ConnectionEvent event) {
            public void sendAllowed(ConnectionEvent event) {
            public void accept(ConnectionEvent event) {
                Connection uconn = event.getConnection();
                new User(uconn, perUser, idleTime);
        conn.listen(port);
        idleTimer.cancel();
    private void oneSec() {
        Collection<User> uc = perUser.values();
        for(User u : uc) {
            u.oneSec();
//================= User.java ==============================================//
package pkwnet.msgswitch;
import java.io.*;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Logger;
import java.util.logging.Level;
* defines the processing for a message switch user
* @author PKWooster
* @version 1.0 June 15,2004
public class User implements ConnectionListener {
    private ConcurrentHashMap<String, User> perUser;
    private String name;
    private String address;
    private boolean signedOn = false;
    private String[] targets;
    private AtomicInteger remainingTime;
    private int idleTime;
    Connection conn;
    Logger logger;
* construct a user, link it to its connection and put it in the perUser table
    User(Connection conn, ConcurrentHashMap<String,User>p, int idle) {
        this.conn = conn;
        logger = Logger.getLogger("msgswitch.user");
        conn.addConnectionListener(this);
        address = conn.getAddress();
        logger.info("creating user " + address);
        perUser = p;
        idleTime = idle;
        remainingTime = new AtomicInteger(idleTime);
        rename(address);
        targets = new String[0];
* process state changes
    public void stateChanged(ConnectionEvent event) {
        if(event.getState() == Connection.State.CLOSED) {
            close(false);
* data is available, process commands and forward other data.
    public void dataAvailable(ConnectionEvent event) {
        String msg = event.getData();
        if (msg.startsWith("$")) {
            doCommand(msg);
        } else {
            forward(msg);
        remainingTime.set(idleTime);
* do nothing for sendAllowed events
    public void sendAllowed(ConnectionEvent event) {
* do nothing for accept events
    public void accept(ConnectionEvent event) {
* called once per second by the server main thread.
    public void oneSec() {
        if(idleTime != 0 && 1 > remainingTime.decrementAndGet()) {
            close(true);
* send a message
    private void send(String msg) {
        conn.send(msg);
        remainingTime.set(idleTime);
* forward data messages to other users
* @param txt the message to send
    private void forward(String txt) {
        txt = name+": "+txt + "\n";
        if(0 < targets.length) {
            for(String target :targets) {
                User user = perUser.get(target);
                if(user != null) {
                    user.send(txt);
        } else {
            for (User user : perUser.values()) {
                if (user != this) {
                    user.send(txt);
* execute command messages, commands start with a $
* and contain arguments delimited by white space.
* @param command the command string
    private void doCommand(String command) {
        boolean good = false;
        command = command.substring(1).trim();
        if(command.length() > 0) {
            String [] args = command.split("\\s+");
            if(args[0].equals("on")) {
                good = signOn(args);
            } else if(args[0].equals("off")) {
                good = signOff(args);
            } else if(args[0].equals("list")) {
                good = listUsers(args);
            } else if(args[0].equals("to")) {
                good = setTargets(args,1);
            } else if(args[0].equals("idle")) {
                good = setIdle(args);
            if(!good) {
                send("invalid command=" + command + "\n");
* sign on command
    private boolean signOn(String [] args) {
        boolean good = false;
        if(args.length >1) {
            String nm = args[1];
            logger.info("signing on as: " + nm);
            if(rename(nm)) {
                conn.setName(name);
                send("Signed on as " + name + "\n");
                signedOn = true;
                good = true;
                setTargets(args,2);
            } else {
                send("name="+nm+" already signed on\n");
        return good;
* set forwarding targets
    private boolean setTargets(String [] args, int start) {
        if(start < args.length) {
            targets = new String[args.length-start];
            System.arraycopy(args, start, targets, 0, targets.length);
        String str = "to=";
        for(String target : targets) {
            str += (target + " ");
        send(str+"\n");
        return true;
* set idle timeout
    private boolean setIdle(String[] args) {
        try {
            idleTime = new Integer(args[1]).intValue();
            remainingTime.set(idleTime);
            send("idle time set to "+idleTime+"\r\n");
            return true;
        } catch(NumberFormatException exc) {
            return false;
* sign off
    private boolean signOff(String [] args) {
        close(true);
        return true;
* list connected users
    private boolean listUsers(String [] args) {
        TreeSet<String> allUsers = new TreeSet<String>(perUser.keySet());
        HashSet<String> t = new HashSet<String>(Arrays.asList(targets));
        LinkedList<String> users;
        String response = "On,Target,Nickname\n";
        if(args.length < 2) {
            users = new LinkedList<String>(allUsers);
        } else {
            users = new LinkedList<String>();
            for (int i = 1; i < args.length; i++) {
                users.add(args);
for(String username : users) {
if(username.equals(name)) {
response += "*,";
} else {
response += (allUsers.contains(username) ? "y," : "n,");
response += (t.contains(username) ? "y," : "n,");
response += (username + "\n");
send(response);
return true;
* rename this user, first we attempt to add the new name then we remove
* the old one. Both names will be registered for a short while.
* @param newname the new name for this user
* @return true if the rename was successful
private boolean rename(String newname) {
boolean b = false;
logger.info("rename name="+name+" newname="+newname);
if (name != null && name.equals(newname)) {
b = true;
} else if (null == perUser.putIfAbsent(newname, this)) {
if (name != null) {
perUser.remove(name);
name = newname;
b = true;
return b;
* delete from perUser and close our connection
private void close(boolean disconnect) {
logger.info("closing user "+name);
perUser.remove(name);
if (disconnect) {
conn.disconnect();
//====================== Connection.java ===============================//
package pkwnet.msgswitch;
import java.util.HashSet;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Logger;
import java.util.logging.Level;
public abstract class Connection {
public enum State {CLOSED, OPENING, OPENED, CLOSING}
private HashSet<ConnectionListener> listeners = new HashSet<ConnectionListener>();
private State state = State.CLOSED;
private String host = "127.0.0.1";
private int port = 6060;
private String name = "unconnected";
public Connection() {
public abstract void listen(int port);
public abstract void connect(String address);
public abstract void disconnect();
public abstract void send(String message);
public void addConnectionListener(ConnectionListener listener) {
listeners.add(listener);
public void removeConnectionListener(ConnectionListener listener) {
listeners.remove(listener);
protected void fireDataAvailable(String data) {
for (ConnectionListener listener : listeners) {
listener.dataAvailable(new ConnectionEvent(this, state, data));
private void fireStateChanged() {
for (ConnectionListener listener : listeners) {
listener.stateChanged(new ConnectionEvent(this, state));
protected void fireSendAllowed() {
for (ConnectionListener listener : listeners) {
listener.sendAllowed(new ConnectionEvent(this, state));
protected void fireAccept(Connection conn) {
for (ConnectionListener listener : listeners) {
listener.accept(new ConnectionEvent(this, conn));
protected void setState(State state) {
if (this.state != state) {
this.state = state;
fireStateChanged();
public State getState() {
return state;
protected void setAddress(String address) {
          int n = address.indexOf(':');
          String pt = null;
setName(address);
if(n == 0) {
               host = "127.0.0.1";
               pt = address.substring(1);
          else if(n < 0) {
               host = address;
               port = 5050;
          } else {
host = address.substring(0,n);
               pt = address.substring(n+1);
if (pt != null) {
try {
port = Integer.parseInt(pt);
} catch (NumberFormatException e) {
port = -1;
public String getName() {
return name;
public void setName(String value) {
name = value;
public String getAddress() {
return host + ":" + port;
public String getHost() {
return host;
public void setPort(int value) {
port = value;
public int getPort() {
return port;
//=================== ConnectionEvent.java ================================//
package pkwnet.msgswitch;
public class ConnectionEvent extends java.util.EventObject {
private final String data;
private final Connection.State state;
private final Connection conn;
public ConnectionEvent(Object source, Connection.State state, String data, Connection conn) {
super(source);
this.state = state;
this.data = data;
this.conn = conn;
public ConnectionEvent(Object source, Connection.State state, String data) {
this(source, state, data, null);
public ConnectionEvent(Object source, Connection.State state) {
this(source, state, null, null);
public ConnectionEvent(Object source, Connection conn) {
this(source, conn.getState(), null, conn);
public Connection.State getState() {
return state;
public String getData() {
return data;
public Connection getConnection() {
return conn;
//============================ ConnectionListener.java ===================//
package pkwnet.msgswitch;
public interface ConnectionListener extends java.util.EventListener {
public void stateChanged(ConnectionEvent event);
public void dataAvailable(ConnectionEvent event);
public void sendAllowed(ConnectionEvent event);
public void accept(ConnectionEvent event);
//============================ StreamConnection.java ===================//
package pkwnet.msgswitch;
import java.net.Socket;
import java.net.ServerSocket;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.IOException;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Logger;
import java.util.logging.Level;
* provides stream socket i/o of character strings
* @author PKWooster
* @version 1.0 September 1, 2005
public class StreamConnection extends Connection {
private Socket sock;
private BufferedReader in;
private BufferedWriter out;
private Thread recvThread = null;
private Thread sendThread = null;
protected LinkedBlockingQueue<String> sendQ;
Logger logger;
public StreamConnection() {
super();
logger = Logger.getLogger("msgswitch.stream");
sendQ = new LinkedBlockingQueue<String>();
* open a socket and start i/o threads
public void connect(String ipAddress) {
setAddress(ipAddress);
try {
sock = new Socket(getHost(), getPort());
connect(sock);
} catch (IOException e) {
logger.log(Level.SEVERE, "Connection failed to=" + ipAddress, e);
private void connect(Socket sock) {
this.sock = sock;
String ipAddress = getAddress();
try {
in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
out = new BufferedWriter(new OutputStreamWriter(sock.getOutputStream()));
recvThread = new Thread(new Runnable() {
public void run() {
doRecv();
},"Recv." + getName());
sendThread = new Thread(new Runnable() {
public void run() {
doSend();
},"Send."+getName());
sendThread.start();
recvThread.start();
setState(State.OPENED);
} catch(IOException e) {
logger.log(Level.SEVERE, "Connection failed to="+ipAddress, e);
public void listen(int port) {
StreamConnection sconn;
setPort(port);
try {
ServerSocket ss = new ServerSocket(port);
while(true) {
Socket us = ss.accept();
sconn = new StreamConnection();
String ipAddress = us.getInetAddress() + ":" + us.getPort();
sconn.setAddress(ipAddress);
sconn.connect(us);
fireAccept(sconn);
} catch(Exception e) {
logger.log(Level.SEVERE, "listen failed", e);
* close the socket connection
public void disconnect() {
logger.fine("disconnect sock=" + sock + " state="+ getState());
if(getState() == State.OPENED) {
setState(State.CLOSING);
try {
sock.shutdownOutput();
} catch(IOException ie) {
logger.log(Level.SEVERE, "showdown failed", ie);
} else if(getState() != State.CLOSED) {
try {
sock.close();
} catch(Exception e) {
logger.log(Level.SEVERE, "close failed", e);
if (sendThread.isAlive()) {
sendThread.interrupt();
sendQ.clear();
setState(State.CLOSED);
public void send(String message) {
if (getState() == State.OPENED) {
try {
sendQ.put(message);
} catch(InterruptedException e) {
logger.log(Level.SEVERE, "sendQ put interrupted", e);
setState(State.CLOSING);
disconnect();
* sets the public name of this connection
public void setName(String name) {
super.setName(name);
if (sendThread != null) {
try {
recvThread.setName("recv." + name);
sendThread.setName("send." + name);
} catch(Exception e) {
logger.log(Level.SEVERE, "nameing threads failed", e);
* the main loop for the send thread
private void doSend() {
String msg;
boolean running = true;
while (running) {
if (sendQ.size() == 0) {
fireSendAllowed();
try {
msg = sendQ.take();
out.write(msg);
out.flush();
} catch(Exception e) {
if (getState() == State.OPENED) {
logger.log(Level.SEVERE, "write failed", e);
setState(State.CLOSING);
disconnect();
running = false;
* the main loop for the receive thread
private void doRecv() {
String inbuf;
while (getState() == State.OPENED) {
try {
inbuf = in.readLine();
} catch(Exception e) {
if (getState() == State.OPENED) {
logger.log(Level.SEVERE, "readline failed", e);
inbuf = null;
if(inbuf == null) {
logger.fine("null received on: " + getAdd

Here are three of them:
NIO server
NIO client
Multithreaded server
The stream based client example seems to have been deleted, probably lost in the troll wars. I also posted a new Simple multithreaded server that uses the same protocol. As the client is missing, I'll repost it.

Accessing seured website using java URL/Socket programming

Hi,
I am working on an intranet search engine using java URL and Authenticator class. This is a secured web-site using SSL in http server. I am not able to access the password protected pages. Following is the code:
URL url = new URL("https://*************");
URLConnection connection = url.openConnection();
PasswordAuthentication pa = Authenticator.requestPasswordAuthentication( InetAddress.getByName(connection.getURL().getHost()),
connection.getURL().getPort(), connection.getURL().getProtocol(), null, "Basic");
StringBuffer buf = new StringBuffer("*****************");
buf.append(":");
buf.append("************");
String encoded = new sun.misc.BASE64Encoder().encode(buf.toString().getBytes());
connection.setRequestProperty ("Authorization", "Basic" + encoded);
InputStream content = (InputStream)connection.getInputStream();
BufferedReader in = new BufferedReader (new InputStreamReader (content));
String line;
while ((line = in.readLine()) != null) {
System.out.println(line);
Let me know if there is any other alternative
tnx,
Biswajit Biswal

Below is my first test program. I first take the home page of a website (this can be automated later) and save it to "myTest.html". Then I try to see if this page contains the keywords that a company website often has.
Could you give your opinion on this approach?
If this approach is fine, then any idea about the keywords to select a company website from other sites is welcome.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
public class MyTest {
      * @param args
      * @throws IOException
     public static void main(String[] args) throws IOException {
          InputStream in = MyTest.class.getResourceAsStream("/myTest.html");
          Reader reader = new InputStreamReader(in, "UTF-8");
          BufferedReader bufferedReader = new BufferedReader(reader);
          String line;
          while ((line = bufferedReader.readLine()) != null) {
               line=line.toLowerCase();
               if (line.contains("contact us")) {
                    System.out.println("contact us: line = "+line);
               if (line.contains("career")) {
                    System.out.println("career: line = "+line);
               if (line.contains("company")) {
                    System.out.println("company: line = "+line);
               if (line.contains("about us")) {
                    System.out.println("about us: line = "+line);
               if (line.contains("product")) {
                    System.out.println("product: line = "+line);
          bufferedReader.close();
          reader.close();
}

How to get the context data using java script in interactive forms

Hi All,
How to get the context data using java script in interactive forms by adobe, am using web dynpro java
thanks.

Hi venkat,
Please Refer this link.
Populating one Drop-Down list from the selection of another Drop-down list
Thanks,
Raju.

How to use java security in a servelt with weblogic as a servlet engine?

Hi,
i want to use standard java security with a user defined permission in
servlet with wls 5.1 (Win nt) as a servelt engine.
WL-Home: f:\weblogic
Server: f:\weblogic\elan
Servlet: f:\weblogic\elan\elan\ServletGropsTest.class
The Servlet is registered in weblogic.properties:
weblogic.httpd.register.elan.ServletGropsTest=elan.ServletGropsTest
i've added this to the weblogic.policy:
grant codebase "file:f:/weblogic/elan/elan/" {
permission java.security.AllPermission;
The servlet code is:
SecurityManager m = System.getSecurityManager();
if (m != null) m.checkPermission(new AndisPermission("x","y"));
WLS throws the permission-exception:
Do Jul 18 11:54:54 GMT+02:00 2002:<E> <ServletContext-General> Servlet
failed with Exception
java.security.AccessControlException: access denied
(elan.AndisPermission x y)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java,
Compiled Code)
at java.lang.Exception.<init>(Exception.java, Compiled Code)
at java.lang.RuntimeException.<init>(RuntimeException.java,
Compiled Cod
at elan.ServletGropsTest.doGet(ServletGropsTest.java, Compiled
Code)
can anyone help?
regards
Andy

ran_t wrote:
...I am using java 1.3.Why are you using an utterly obsolete version of Java?
My program using log4j jar.
When i put the log4j.jar in a path that include spaces like "c:\Program files\",Try it as c:\Program%20files\

PI7.11 Can I use Java proxy on Advanced Adapter Engine ??

To:PI Specialists
Now I m planning to use Java Proxy on PI7.11.
and I want to know Java Proxy can act on AAE as local processing.
I wonder that Java Proxy do not connect to adapter engine but to integration engine.
If it connect to integration engine I ll not to use Java Proxy on AAE...
Please teach me about Java proxy will do on AAE....
Naoki Kurihara

Now I find out we can't use Java Proxy on AAE....
Please check this pdf page 12.
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/70066f78-7794-2c10-2e8c-cb967cef407b?quicklink=index&overridelayout=true

Interaction with Microsoft Word using Java Programming

writing Text ON TO MICROSOFT WORD USING java Programming Urgently required

Go throuh jakarta POI(hssf) to do..No! HSSF which stands for Horrible SpreadSheet Format can be used for Excel (spreadsheets as the name suggests). For Word, you would need to lok at HPSF.

Invoke Decision service using Java instead of web service

From a practical perspective, would it be possible to instantiate oracle.bpel.services.rules.impl.DecisionServiceImpl (this is the class used by the BPEL Decision service) in a normal Java program and invoke operations in it to interact with Oracle Rules.
I have tried it but keep getting this error; any clues
<OracleDataModel::getFactType> Fact type org.demo.employee.EmployeeType not found, return null.
<::> ORABPEL-36333
<::>
<::> Error while executing the rule session.
<::> The rule session employeeBonus failed to execute.
<::> Check the underlying exception and correct the error. Contact oracle support if error is not fixable.
<::>
<::> at oracle.bpel.services.rules.rpi.AbstractDefaultRuleSession.execute(AbstractDefaultRuleSession.java:214)
<::> at oracle.bpel.services.rules.impl.DecisionServiceImpl.process(DecisionServiceImpl.java:1202)
<::> at
Thanks!
The detailed logs are given below:
<RuleEngineFactory::loadConfiguration> Load configuration from DecisionServiceConfiguration.xml
<RuleEngineFactory::loadConfiguration> DecisionServiceConfiguration.xml not found, intialize with minimal configuration.
<RuleEngineFactory::loadConfiguration> Try to load rule engine provider Oracle
<RuleEngineFactory::loadConfiguration> Try to load fact context OracleJaxb
<RuleEngineFactory::loadConfiguration> Loaded 1 rule providers and 1 fact context providers.
<DefaultHierarchicalCache::><init>> Create cache for /DecisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService
<?xml version = '1.0' encoding = 'UTF-8'?><assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules"><assertList><Employee xmlns="http://employee.demo.org"><employeeNo>employeeNo</employeeNo><income>1200</income></Employee></assertList></assertExecuteWatchStateless><DecisionServiceImpl::assertExecuteWatchStateless> Started.
<DocumentHandler::createServiceContext> Create decision service context for
<DocumentHandler::createServiceContext> <assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules">
<DocumentHandler::createServiceContext> <assertList>
<DocumentHandler::createServiceContext> <Employee xmlns="http://employee.demo.org">
<DocumentHandler::createServiceContext> <employeeNo>employeeNo</employeeNo>
<DocumentHandler::createServiceContext> <income>1200</income>
<DocumentHandler::createServiceContext> </Employee>
<DocumentHandler::createServiceContext> </assertList>
<DocumentHandler::createServiceContext> </assertExecuteWatchStateless>
<DocumentHandler::createServiceContext> Decision service context is
<DocumentHandler::createServiceContext> <assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules">
<DocumentHandler::createServiceContext> <assertList>
<DocumentHandler::createServiceContext> <Employee xmlns="http://employee.demo.org">
<DocumentHandler::createServiceContext> <employeeNo>employeeNo</employeeNo>
<DocumentHandler::createServiceContext> <income>1200</income>
<DocumentHandler::createServiceContext> </Employee>
<DocumentHandler::createServiceContext> </assertList>
<DocumentHandler::createServiceContext> </assertExecuteWatchStateless>
<DecisionServiceImpl::preProcess> path: /DecisionService, context: WSIF
<DocumentHandler::readConfiguration> Read decision service config from Local J2EE WS.
<DocumentHandler::readConfiguration> Cache config URL file:/C:/learn/netbeans/OracleRulesProfile/build/classes/decisionservices.xml
<DocumentHandler::readConfiguration> Read configuration from file:/C:/learn/netbeans/OracleRulesProfile/build/classes/decisionservices.xml
<DecisionServiceCache::prepare> Cache decision services for path /DecisionService
<DefaultHierarchicalCache::create> Path /DecisionService/ruleEngine
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/ruleEngine
<DefaultHierarchicalCache::create> Path /DecisionService/decisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/decisionService
<DefaultHierarchicalCache::create> Path /DecisionService/datamodel
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/datamodel
<DefaultHierarchicalCache::create> Path /DecisionService/ruleset
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/ruleset
<DefaultHierarchicalCache::create> Path /DecisionService/rulesession
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/rulesession
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository not found in cache.
<DecisionServiceCache::prepare> Create rule engine for provider DemoRepository and cache at /DecisionService/ruleEngine
<RuleEngineFactory::createRuleEngine> Create rule engine for DemoRepository, provider is Oracle
<OracleRuleEngine::getLastModified> Check timestamp of repository C:\learn\jdeveloper\POC\OracleRules\demoRepository
<OracleRuleEngine::><init>> Create new rule engine for DemoRepository, repository type File
<DefaultHierarchicalCache::put> Path /DecisionService/ruleEngine, name: DemoRepository
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService not found in cache.
<DecisionServiceCache::prepare> Cache decision service metadata for DecisionService at /DecisionService/decisionService
<DefaultHierarchicalCache::put> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus not found in cache.
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<DecisionServiceCache::prepare> Cache rulesession metadata for DemoRepository$demoDictionary@production$employeeBonus at /DecisionService/ruleset
<OracleRuleEngine::getRuleCatalog> Lookup rule catalog demoDictionary/production
<OracleRuleEngine::getRuleCatalogs> Start loading rule catalogs.
<OracleRuleEngine::getRuleCatalogs> Initailize rule repository.
<OracleRuleEngine::initRuleRepository> Connect to File Repository at C:\learn\jdeveloper\POC\OracleRules\demoRepository
<OracleRuleEngine::getRuleCatalogs> Load catalogs.
<OracleRuleEngine::getRuleCatalog> Found rule catalog demoDictionary/production, return.
<OracleRuleCatalog::getRuleSet> Lookup ruleset employeeBonus
<OracleRuleCatalog::getRuleSets> Load rulesets.
<OracleRuleCatalog::getRuleSets> Load rulesets done.
<OracleRuleCatalog::getRuleSet> Found ruleset employeeBonus, return.
<DefaultHierarchicalCache::put> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceImpl::assertExecuteWatchStateless> Process request for /DecisionService
<DecisionServiceImpl::process> DecisionService, path=/DecisionService, pattern: AssertExecuteWatchStateless
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceImpl::process> Found service DecisionService in cache.
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceCache::getRuleEngine> Get rule engine DemoRepository for service DecisionService from /DecisionService/ruleEngine
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<OracleRuleEngine::getLastModified> Check timestamp of repository C:\learn\jdeveloper\POC\OracleRules\demoRepository
<DecisionServiceImpl::process> Found rule engine DemoRepository, provider is Oracle, repository type File
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/rulesession, name: employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/rulesession, name: employeeBonus not found in cache.
<DecisionServiceCache::createRuleSession> Create stateless rulesession employeeBonus for service DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<OracleRuleEngine::createRuleSession> Create rule session employeeBonus
<AbstractDefaultRuleSession::init> Initialize rule session employeeBonus providing rule set employeeBonus
<OracleRuleSession::init> Initialize rule session employeeBonus, ruleset employeeBonus
<OracleRuleSession::init> Initialize rule session done.
<AbstractDefaultRuleSession::execute> Exceute rule session employeeBonus, pattern: AssertExecuteWatchStateless
<AbstractDefaultRuleSession::execute> Create pattern converter for DecisionService
<AbstractDefaultRuleSession::execute> Convert decide context for DecisionService
<AbstractPatternConverter::convertList> Start converting list for Assert
<OracleDataModel::getFactType> Lookup fact type org.demo.employee.EmployeeType
<OracleDataModel::getFactTypes> Started.
<OracleDataModel::getFactTypes> Initialize data model.
<OracleDataModel::getFactTypes> Import 18 fact types into data model.
<OracleDataModel::getFactTypes> 1 XML facts imported, Done.
<OracleDataModel::getFactType> Fact type org.demo.employee.EmployeeType not found, return null.
Exception in thread "main" ORABPEL-36333
Error while executing the rule session.
The rule session employeeBonus failed to execute.
Check the underlying exception and correct the error. Contact oracle support if error is not fixable.
at oracle.bpel.services.rules.rpi.AbstractDefaultRuleSession.execute(AbstractDefaultRuleSession.java:214)
at oracle.bpel.services.rules.impl.DecisionServiceImpl.process(DecisionServiceImpl.java:1202)
at oracle.bpel.services.rules.impl.DecisionServiceImpl.assertExecuteWatchStateless(DecisionServiceImpl.java:578)
at demo.TestDecisionService.main(TestDecisionService.java:56)
...

If you want to use the rule engine fro Java, I guess you should use the SDK:
http://download-uk.oracle.com/docs/cd/B31017_01/web.1013/b28965/sdk.htm#sthref229

Access database using Java from HTML webpage

Hi,
I've got to create some online maths tests to be taken by students with their marks being stored in a database.
I've wrote some simple java code which can add/remove and modify entries in a test mySQL database that I made. What I now need to do is be able to add entries to the database from a html page.
The math tests will be java applets with the students having to interact according to questions, press submit and their score will be output. The score will then be entered into the database.
The problem I'm having is that with an Applet their are all sorts of security issues (I'm having problems getting images to load in an Applet) so assume I'll face the same security issues when I try to access a database through an applet.
So, could someone please help get started.
Cheers

MVC - I assume you mean model-view-control and not Marvel vs Capcom :)
If so then does this mean I should completely seperate the user interface (the actual applets that will contain the test), the database (that will store the results) and the link between the two?
is it possible to acheive this using Java, Java Applets, Java Script and the database (in my case mySQL) and could you give me some tips on how best to tackle the problem.
Thanks

Interactive ROI Calculator using Flash Catalyst?

Hello, a client of ours has asked us to create an interactive ROI calculator similar to the one in the following link:
http://bit.ly/98vjCF
Our design and production department does work in Flash, mainly to create simple web banners, however they're not hardcore Flash developers by any means. We'll be upgrading from CS4 to CS5 with Catalyst soon. Is it possible to create an interactive ROI calculator using this software or would using a seasoned Flash developer be a better choice?
Thanks for any info.
henry

Hi Henry,
You can use Flash Catalyst to design the UI of your calculator, both for protyping and optionally for final production too. However, to do the actual calculations you'll have to write a bit of code using another tool. For example, you can import the Catalyst project into Flash Builder and wire up the calculation logic to the UI you've created. This gives you the option of having a nontechnical designer work on the UI, while a less design-oriented developer writes code without having to worry much about the visuals.
The underlying code used in a Catalyst project is Flex 4. This should be a snap for a seasoned Flash developer to work with. Or, a Java or JavaScript developer should also be able to get up to speed on Flex pretty easily (especially if the UI was already built in Catalyst and the dev is just wiring up the "business logic").
Hope that helps,
- Peter

Creating an ES using Java + exposing SAP functionalities as an ES

Hi experts,
I am new to SOA and need to learn more about defining new enterprise service.
My skill set is basically Java and J2ee concepts including web services.
As a webservice programmer, I can understand the interesting concept of SOA.
And I wanted to practise on SOA, by defining a simple ES and build a simple business process based on that.
Now I have downloaded NWDS , NW Composition environment and ESR.
I have also practised some WD, EP and VC.
Do I need any more s/w to be downloaded?
Now can any of you suggest,
1)Steps needed to define and build a new ES using Java?
2)How to expose simple SAP functionalities as an enterprise service?
3)Last step and the only step I know is to build a business process using VC. But, can any of you suggest a simple business process for me to compose and practise, using enterprise services built in Java, or enterprise services exposing a SAP functionality ?
Thanks in advance,
Aravind.

Hi Aravind,
Do I need any more s/w to be downloaded?
No, these are sufficient to approach towards Business process, compsition and ESOA .
1)Steps needed to define and build a new ES using Java?
Enterprise services are currently being implemented by customers, partners or SAP itself. May be in future they come up with something.
J2EE Web Services can be developed with web servers and tools, But ES is more of business semantics instead of technical one.
The main difference between SOA and ESOA is approch.
Earlier anything we were exposing with Web Services , we were calling it as SOA.i.e we were/are exposing already developed functions as web service for better interoperatibility.
ESOA is defining services in such a way that they are useful for reuability with business semantics and implementation is done after preparing the interface.
Currently, it is not much clear to provide implementation with ABAP or JAVA or wahat are pros/cons of any approach except that what skills are available.
You will not be able to develop an Enterprise Services, but merely you can simple develop and deploy any Web Service.
2)How to expose simple SAP functionalities as an enterprise service?
Again, this is done by SAP. You can expose Function Modules(ABAP) as a web Service but that is not true ESOA approach.
3)Last step and the only step I know is to build a business process using VC. But, can any of you suggest a simple business process for me to compose and practise, using enterprise services built in Java, or enterprise services exposing a SAP functionality ?
CAF( complete J2EE solution) is maily used to define Business Process with user interaction. You can find a lot of tutorials in SDN.
Hope this helps.
Regards,
Piyush

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