How to store current time into database when key is pressed in  text input?

I am a beginner in java programming.
I use netbeans in my project which I need to cature the keystroke pattern of users.I have problem in capturing and storing the current time when a key is pressed or released in a text input.
This is the jsp i wrote.
<SCRIPT LANGUAGE=JAVASCRIPT><!--
var current;
var previous;
var current_time;
var previous_time;
var count_latency = 0;
function keyDown(e) {
current = new Date();
current_time = current.getTime();
latency=(current_time-previous_time);
previous_time=current_time;
function keyUp(e) {
count_latency = 1;
current= new Date();
current_time = current.getTime();
hold_time=(current_time-previous_time);
//--></SCRIPT>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>web application</title>
</head>
<body>
<form name="temp">
<h2>
Steps:     
<h2>
Step 1:     Please type your password for 10 times with your normal typing rhythm.
<h2>
Step 2:     Press Enter or "Next" button when done.
<h2>
Username <input type="text" name="username" value="" width="20" />
<h2>
Password <input type="password" name="password" value="" width="20" onkeydown="javascript:keyDown(event)" onkeyup="javascript:keyUp(event)" />
<h2>
<input type="submit" value="Next" name="Next" />
</form>
</body>
</html>
I can't store the latency and hold_time value into my database (Java DB Database) in javascript.
Can anyone please help me?

Thanks shoopy for your suggestion.
But, I want to store latency and hold_time to database everytime the key is pressed and released, that means users are typing, meanwhile the values of latency and hold_time are stored. The datas are stored before users click "Next" button. So, is it POST that form to a JSP page can solve it?
Hope you all can help me, I have been stuck in this problem for a long time.
Thanks

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              <mx:StringValidator id="vAddressValidator"          source="{vAddressField}"          property="text" minLength="5" required="true" />
              <mx:StringValidator id="cPersonValidator" source="{cPersonField}"          property="text" minLength="2" required="true" />
              <mx:StringValidator id="cAddressValidator"          source="{cAddressField}"          property="text" minLength="5" required="true" />
              <mx:Grid width="575" height="211">
                        <mx:GridRow width="575" height="211">
                                  <mx:GridItem width="301" height="235">
                                            <mx:Form width="301" height="208">
                                                      <mx:FormItem label="Visitor's Type">
                                                                <mx:ComboBox id="vTypeField" text="{visitor.vType}" change="validateForm(event);" editable="true">
                                                                          <mx:Array>
                                                                                    <mx:String></mx:String>
                                                                                    <mx:String>Contractor</mx:String>
                                                                                    <mx:String>Supplier</mx:String>
                                                                                    <mx:String>Transporter</mx:String>
                                                                                    <mx:String>Plant</mx:String>
                                                                                    <mx:String>Non-Plant</mx:String>
                                                                          </mx:Array>
                                                                </mx:ComboBox>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Visit Purpose">
                                                                <mx:ComboBox id="vPurposeField" text="{visitor.vPurpose}" change="validateForm(event);" editable="true">
                                                                          <mx:Array>
                                                                                    <mx:String></mx:String>
                                                                                    <mx:String>Official</mx:String>
                                                                                    <mx:String>Personal</mx:String>
                                                                          </mx:Array>
                                                                </mx:ComboBox>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Visitor's Name">
                                                                <mx:TextInput id="vNameField"  text="{visitor.vName}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Address">
                                                                <mx:TextInput id="vAddressField"   text="{visitor.vAddress}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Contact Person">
                                                                <mx:TextInput id="cPersonField"  text="{visitor.cPerson}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Address">
                                                                <mx:TextInput id="cAddressField"  text="{visitor.cAddress}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      </mx:Form>
                                  </mx:GridItem>
                                  <mx:GridItem width="264" height="193">
                                            <mx:Grid width="241" height="206">
                                                      <mx:GridRow width="100%" height="100%">
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center" verticalAlign="middle">
                                                                          <mx:Panel width="100" height="132" title="Snap" id="preview" layout="absolute"/>
                                                                </mx:GridItem>
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center" verticalAlign="middle">
                                                                          <mx:Panel width="100" height="132" title="Preview" id="imageViewer"  layout="absolute"/>
                                                                </mx:GridItem>
                                                      </mx:GridRow>
                                                      <mx:GridRow width="100%" height="27" >
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center">
                                                                          <mx:Button id="snapshot" x="2" width="106" height="27" label="Snap"
                                                                                                  click="takeSnapshot();"/>
                                                                </mx:GridItem>
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center">
                                                                          <mx:Button id="deleteButton" x="1" width="106" height="27" label="Delete"
                                                                                                  click="deleteSnapshot();"/>
                                                                </mx:GridItem>
                                                      </mx:GridRow>
                                            </mx:Grid>
                                  </mx:GridItem>
                        </mx:GridRow>
              </mx:Grid>
              <mx:ControlBar height="40" horizontalAlign="center">
                        <mx:Button label="Save Visitor"          id="submitButton" enabled="{formIsValid}" click="saveVisitor();" />
                        <mx:Button label="Clear form" enabled="{!formIsEmpty}"          click="clearFormHandler();" />
                        <mx:Button label="Cancel" click="PopUpManager.removePopUp(this);"/>
                        <mx:Label width="211" id="state"/>
              </mx:ControlBar>
              <mx:Text text="{message}" fontWeight="bold" width="300"/>
    </mx:TitleWindow>
    ListVisitors.mxml
    <?xml version="1.0" encoding="utf-8"?>
    <mx:Panel
              xmlns:mx="http://www.adobe.com/2006/mxml"
              xmlns:view="com.visitor.view.*"
              width="100%"
              height="100%"
              title="Visitor Management System - Found {visitorRecords} visitors."
              creationComplete="loadVisitors();">
              <mx:RemoteObject id="loaderService" destination="visitorService" result="handleLoadResult(event)"          fault="handleFault(event)" showBusyCursor="true" />
              <mx:RemoteObject id="deleteService" destination="visitorService" result="handleDeleteResult(event)"          fault="handleFault(event)" showBusyCursor="true" />
              <mx:Script>
                        <![CDATA[
                                  import com.visitor.vo.Visitor;
                                  import mx.controls.Alert;
                                  import mx.managers.PopUpManager;
                                  import mx.containers.TitleWindow;
                                  import mx.collections.ArrayCollection;
                                  import mx.rpc.events.ResultEvent;
                                  import mx.rpc.events.FaultEvent;
                                  [Bindable]
                                  private var message:String;
                                  [Bindable]
                                  private var visitors:ArrayCollection = new ArrayCollection();
                                  [Bindable]
                                  private var visitorRecords:int = 0;
                                  public function loadVisitors():void {
                                            loaderService.getVisitors();
                                  private function deleteVisitor():void {
                                            if(dataGrid.selectedItem != null) {
                                                      var selectedItem:Visitor = dataGrid.selectedItem as Visitor;
                                                      deleteService.deleteVisitor(selectedItem.visitorId);
                                  private function createVisitor():void {
                                            var titleWindow:VisitorEntryForm = VisitorEntryForm(PopUpManager.createPopUp(this, VisitorEntryForm, true));
                                            titleWindow.setStyle("borderAlpha", 0.9);
                                            titleWindow.formIsEmpty = true;
                                  private function updateVisitor():void {
                                            var titleWindow:VisitorEntryForm = VisitorEntryForm(PopUpManager.createPopUp(this, VisitorEntryForm, true));
                                            titleWindow.setStyle("borderAlpha", 0.9);
                                            titleWindow.visitor = dataGrid.selectedItem as Visitor;
                                            titleWindow.formIsEmpty = false;
                                  private function handleLoadResult(ev:ResultEvent):void {
                                            visitors = ev.result as ArrayCollection;
                                            visitorRecords = visitors.length;
                                  private function handleDeleteResult(ev:ResultEvent):void {
                                            Alert.show("The visitor has been deleted.", "Information", Alert.OK, null, null, null, Alert.OK);
                                            loadVisitors();
                                  private function handleFault(ev:FaultEvent):void {
                                            message = "Error: "
                                                      + ev.fault.faultCode + " - "
                                                      + ev.fault.faultDetail + " - "
                                                      + ev.fault.faultString;
                        ]]>
              </mx:Script>
              <mx:VBox width="100%" height="100%">
                        <mx:Label text="{message}" fontWeight="bold" includeInLayout="false" />
                        <mx:DataGrid
                                  id="dataGrid"
                                  width="100%"
                                  height="100%"
                                  dataProvider="{visitors}"
                                  doubleClickEnabled="true"
                                  doubleClick="updateVisitor()" >
                                  <mx:columns>
                                            <mx:DataGridColumn dataField="visitorId"          headerText="Visitor ID" width="100"/>
                                            <mx:DataGridColumn dataField="vType"                    headerText="Visitor's Type" />
                                            <mx:DataGridColumn dataField="vPurpose"           headerText="Visit Purpose" />
                                            <mx:DataGridColumn dataField="vName"                     headerText="Visitor's Name" />
                                            <mx:DataGridColumn dataField="vAddress"                    headerText="Visitor's Address" />
                                            <mx:DataGridColumn dataField="cPerson"                     headerText="Contact Person" />
                                            <mx:DataGridColumn dataField="cAddress"                    headerText="Contact Address" />
                                            <mx:DataGridColumn dataField="timeIn"                     headerText="Time-In" />
                                            <mx:DataGridColumn dataField="timeOut"                     headerText="Time-Out" />
                                            <mx:DataGridColumn dataField="vPhoto"                     headerText="Visitor's Photo" />
                                  </mx:columns>
                        </mx:DataGrid>
                        <mx:ControlBar horizontalAlign="center">
                                  <mx:Button label="Create Visitor"          click="createVisitor()"          toolTip="Create a new visitor and store it in the database." />
                                  <mx:Button label="Update Visitor"          click="updateVisitor()"           enabled="{dataGrid.selectedItem}" toolTip="Update an existing database visitor." />
                                  <mx:Button label="Delete Visitor"          click="deleteVisitor()"          enabled="{dataGrid.selectedItem}" toolTip="Delete the visitor from the database." />
                                  <mx:Button label="Reload Data"                    click="loadVisitors()"           toolTip="Reload the visitor list from the database." />
                        </mx:ControlBar>
              </mx:VBox>
    </mx:Panel>
    Visitor.as
    package com.visitor.vo
              import mx.controls.Image;
              import spark.primitives.BitmapImage;
              [Bindable]
              [RemoteClass(alias="com.visitor.Visitor")]
              public class Visitor
                        public function Visitor()
                        public var visitorId:Number;
                        public var vType:String;
                        public var vPurpose:String;
                        public var vName:String;
                        public var vAddress:String;
                        public var cPerson:String;
                        public var cAddress:String;
                        public var timeIn:Date;
                        public var timeOut:Date;
                       public var vPhoto: Image;
    Visitor.java
    package com.visitor;
    import java.sql.Blob;
    import java.sql.Timestamp;
    import javax.persistence.Basic;
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;
    import javax.persistence.Id;
    import javax.persistence.NamedQueries;
    import javax.persistence.NamedQuery;
    import javax.persistence.Table;
    import org.hibernate.annotations.Index;
    @Entity
    @Table(name = "visitors")
    @NamedQueries( {
                        @NamedQuery(name = "visitors.findAll", query = "from Visitor"),
                        @NamedQuery(name = "visitors.byId", query = "select v from Visitor v where v.visitorId= :visitorId") })
    public class Visitor {
              @Id
              @GeneratedValue(strategy = GenerationType.AUTO)
              @Column(name = "visitorId", nullable = false)
              private Long visitorId;
              @Basic
              @Index(name = "vType_idx_1")
              @Column(name = "vType", nullable = true, unique = false)
              private String vType;
              @Basic
              @Column(name = "vPurpose", nullable = true, unique = false)
              private String vPurpose;
              @Basic
              @Column(name = "vName", nullable = true, unique = false)
              private String vName;
              @Basic
              @Column(name = "vAddress", nullable = true, unique = false)
              private String vAddress;
              @Basic
              @Column(name = "cPerson", nullable = true, unique = false)
              private String cPerson;
              @Basic
              @Column(name = "cAddress", nullable = true, unique = false)
              private String cAddress;
              @Basic
              @Column(name = "timeIn", nullable = false, unique = false)
              private Timestamp timeIn;
              @Basic
              @Column(name = "timeOut", nullable = true, unique = false)
              private Timestamp timeOut;
              @Basic
              @Column(name = "vPhoto", nullable = true, unique = false)
              private Blob vPhoto;
              public Visitor() {
                        super();
              public Long getVisitorId() {
                        return visitorId;
              public void setVisitorId(Long visitorId) {
                        this.visitorId = visitorId;
              public String getvType() {
                        return vType;
              public void setvType(String vType) {
                        this.vType = vType;
              public String getvPurpose() {
                        return vPurpose;
              public void setvPurpose(String vPurpose) {
                        this.vPurpose = vPurpose;
              public String getvName() {
                        return vName;
              public void setvName(String vName) {
                        this.vName = vName;
              public String getvAddress() {
                        return vAddress;
              public void setvAddress(String vAddress) {
                        this.vAddress = vAddress;
              public String getcPerson() {
                        return cPerson;
              public void setcPerson(String cPerson) {
                        this.cPerson = cPerson;
              public String getcAddress() {
                        return cAddress;
              public void setcAddress(String cAddress) {
                        this.cAddress = cAddress;
              public Timestamp getTimeIn() {
                        return timeIn;
              public void setTimeIn(Timestamp timeIn) {
                        this.timeIn = timeIn;
              public Timestamp getTimeOut() {
                        return timeOut;
              public void setTimeOut(Timestamp timeOut) {
                        this.timeOut = timeOut;
              public Blob getvPhoto() {
                        return vPhoto;
              public void setvPhoto(Blob vPhoto) {
                        this.vPhoto = vPhoto;
    VisitorService.java
    package com.visitor;
    import java.sql.Timestamp;
    import java.util.Date;
    import java.util.List;
    import javax.persistence.EntityManager;
    import javax.persistence.EntityManagerFactory;
    import javax.persistence.EntityTransaction;
    import javax.persistence.Persistence;
    import javax.persistence.Query;
    import org.apache.log4j.Logger;
    public class VisitorService {
              private static final String PERSISTENCE_UNIT = "visitor_db";
              private static Logger logger = Logger.getLogger(VisitorService.class);
              public VisitorService() {
                        super();
              public List<Visitor> getvisitors() {
                        logger.debug("** getVisitors called...");
                        EntityManagerFactory entityManagerFactory = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = entityManagerFactory.createEntityManager();
                        Query findAllQuery = em.createNamedQuery("visitors.findAll");
                        List<Visitor> visitors = findAllQuery.getResultList();
                        if (visitors != null)
                                  logger.debug("** Found " + visitors.size() + " records:");
                        return visitors;
              public void addUpdateVisitor(Visitor visitor) throws Exception {
                        logger.debug("** addUpdateVisitor called...");
                        EntityManagerFactory emf = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = emf.createEntityManager();
                        // When passing Boolean and Number values from the Flash client to a
                        // Java object, Java interprets null values as the default values for
                        // primitive types; for example, 0 for double, float, long, int, short,
                        // byte.
                        if (visitor.getVisitorId() == null          || visitor.getVisitorId() == 0) {
                                  // New consultant is created
                                  visitor.setVisitorId(null);
                                  visitor.setTimeIn(new Timestamp(new Date().getTime()));
                        } else {
                                  visitor.setTimeOut(new Timestamp(new Date().getTime()));
                                  // Existing consultant is updated - do nothing.
                        EntityTransaction tx = em.getTransaction();
                        tx.begin();
                        try {
                                  em.merge(visitor);
                                  tx.commit();
                        } catch (Exception e) {
                                  logger.error("** Error: " + e.getMessage());
                                  tx.rollback();
                                  throw new Exception(e.getMessage());
                        } finally {
                                  logger.info("** Closing Entity Manager.");
                                  em.close();
              public void deleteVisitor(Long visitorId) {
                        logger.debug("** deleteVisitor called...");
                        EntityManagerFactory emf = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = emf.createEntityManager();
                        Query q = em.createNamedQuery("visitors.byId");
                        q.setParameter("visitorId", visitorId);
                        Visitor visitor = (Visitor) q.getSingleResult();
                        if (visitor != null) {
                                  EntityTransaction tx = em.getTransaction();
                                  tx.begin();
                                  try {
                                            em.remove(visitor);
                                            tx.commit();
                                  } catch (Exception e) {
                                            logger.error("** Error: " + e.getMessage());
                                            tx.rollback();
                                  } finally {
                                            logger.info("** Closing Entity Manager.");
                                            em.close();
    remoting-config.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <service id="remoting-service" class="flex.messaging.services.RemotingService">
              <adapters>
                        <adapter-definition id="java-object"
                                  class="flex.messaging.services.remoting.adapters.JavaAdapter"
                                  default="true" />
              </adapters>
              <default-channels>
                        <channel ref="my-amf" />
              </default-channels>
              <!-- ADC Demo application -->
              <destination id="visitorService">
                        <properties>
                                  <source>com.visitor.VisitorService</source>
                        </properties>
              </destination>
    </service>

    Hi!
    I am using Flash Builder 4.6, BlazeDS, and Hibernate. How to store a webcam snapshot into the MySql Database. I stored Form Items by using RemoteObject into the database. But I failed to store webcam snapshot. I captured that image on Panel component.I converted that image to ByteArray. Now I want to save that image into the database. Please help me in this regard.
    thanks in advance.
    Here the Code:
    VisitorEntryForm.mxml
    <?xml version="1.0" encoding="utf-8"?>
    <mx:TitleWindow
              xmlns:mx="http://www.adobe.com/2006/mxml"
              xmlns:vo="com.visitor.vo.*"
              width="600"
              height="300"
              defaultButton="{submitButton}"
              showCloseButton="true"
              creationComplete="creationCompleteHandler();"
              close="PopUpManager.removePopUp(this);"
              title="Visitor Entry Form" xmlns:text="flash.text.*">
              <mx:RemoteObject id="saveService" destination="visitorService" result="handleSaveResult(event)" fault="handleFault(event)" showBusyCursor="true" />
              <vo:Visitor id="visitor"
                                               vType="{vTypeField.text}"
                                               vPurpose="{vPurposeField.text}"
                                               vName="{vNameField.text}"
                                               vAddress="{vAddressField.text}"
                                               cPerson="{cPersonField.text}"
                                               cAddress="{cAddressField.text}"
                                     />
                        <mx:Script>
                        <![CDATA[
                        import mx.managers.PopUpManager;
                        import flash.media.Camera;
                        import com.visitor.vo.WebCam;
                        import com.visitor.vo.Base64;
                        import mx.core.UIComponent;
                        import mx.graphics.codec.JPEGEncoder;
                        import mx.controls.Alert;
                        import mx.containers.Canvas;
                        import mx.rpc.events.ResultEvent;
                        import mx.rpc.events.FaultEvent;
                        import mx.events.ValidationResultEvent;
                        import mx.validators.Validator;
                                  [Bindable]
                                  private var webCam: com.visitor.vo.WebCam;
                                  [Bindable]
                                  private var message:String;
                                  [Bindable]
                                  private var formIsValid:Boolean = false;
                                  [Bindable]
                                  public var formIsEmpty:Boolean;
                                  private var focussedFormControl:DisplayObject;
                                  private function handleSaveResult(ev:ResultEvent):void {
                                            clearFormHandler();
                                            validateForm(ev);
                                            Alert.show("Visitor successfully created/updated.", "Information", Alert.OK, null, null, null, Alert.OK);
                                            // Reload the list.
                                            parentApplication.listConsultants.loaderService.getConsultants();
                                            PopUpManager.removePopUp(this);
                                  private function handleFault(ev:FaultEvent):void {
                                            message = "Error: " + ev.fault.faultCode + " \n "
                                                      + "Detail: " + ev.fault.faultDetail + " \n "
                                                      + "Message: " + ev.fault.faultString;
                                  public function saveVisitor():void {
                                            saveService.addUpdateVisitor(visitor);
                                  private function creationCompleteHandler():void {
                                            init();
                                            PopUpManager.centerPopUp(this);
                                            resetFocus();
                                  private function resetFocus():void {
                                            focusManager.setFocus(vTypeField);
                                  public function validateForm(event:Event):void  {
                                            focussedFormControl = event.target as DisplayObject;   
                                            formIsValid = true;
                                            // Check if form is empty
                                            formIsEmpty = (vTypeField.text == "" && vPurposeField.text == "" && vNameField.text == "" && vAddressField.text == "" && cPersonField.text == "" && cAddressField.text == "");
                                            validate(vTypeValidator);               
                                            validate(vPurposeValidator);
                                            validate(vNameValidator);
                                            validate(vAddressValidator);
                                            validate(cPersonValidator);
                                            validate(cAddressValidator);
                                  private function validate(validator:Validator):Boolean {
                                            var validatorSource:DisplayObject = validator.source as DisplayObject;
                                            var suppressEvents:Boolean = (validatorSource != focussedFormControl);
                                            var event:ValidationResultEvent = validator.validate(null, suppressEvents);
                                            var currentControlIsValid:Boolean = (event.type == ValidationResultEvent.VALID);
                                            formIsValid = formIsValid && currentControlIsValid;
                                            return currentControlIsValid;
                                  private function clearFormHandler():void {
                                            // Clear all input fields.
                                            vTypeField.text = "";
                                            vPurposeField.text = "";
                                            vNameField.text = "";
                                            vAddressField.text = "";
                                            cPersonField.text = "";
                                            cAddressField.text = "";
                                            message = "";
                                            // Clear validation error messages.
                                            vTypeField.errorString = "";
                                            vPurposeField.errorString = "";
                                            vNameField.errorString = "";
                                            vAddressField.errorString = "";
                                            cPersonField.errorString = "";
                                            cAddressField.errorString = "";
                                            formIsEmpty = true;
                                            formIsValid = false;
                                            resetFocus();
                                  private function init():void {
                                  webCam = new WebCam(97,97);
                                  var ref:UIComponent = new UIComponent();
                                  preview.removeAllChildren();
                                  preview.addChild(ref);
                                  ref.addChild(webCam);
                                  private function takeSnapshot():void {
                                  imageViewer.visible = true;
                                  imageViewer.width = preview.width;
                                  imageViewer.height = preview.height;
                                  var uiComponent : UIComponent = new UIComponent();
                                  uiComponent.width = webCam.width;
                                  uiComponent.height = webCam.height;
                                  var photoData:Bitmap = webCam.getSnapshot();
                                  var photoBitmap:BitmapData = photoData.bitmapData;
                                  uiComponent.addChild(photoData);
                                  imageViewer.removeAllChildren();
                                  imageViewer.addChild(uiComponent);
                                  private function uploadSnapshot():void
                                            if (imageViewer.getChildren().length > 0)
                                                      var uic:UIComponent = imageViewer.getChildAt(0) as UIComponent;
                                                      var bitmap:Bitmap = uic.getChildAt(0) as Bitmap;
                                                      var jpgEncoder:JPEGEncoder = new JPEGEncoder(75);
                                                      var jpgBytes:ByteArray = jpgEncoder.encode(bitmap.bitmapData);
                                  private function deleteSnapshot():void
                                            imageViewer.removeAllChildren();
                        ]]>
                        </mx:Script>
              <mx:StringValidator id="vTypeValidator"          source="{vTypeField}"          property="text" minLength="2" required="true" />
              <mx:StringValidator id="vPurposeValidator" source="{vPurposeField}"          property="text" minLength="2" required="true" />
              <mx:StringValidator id="vNameValidator"          source="{vNameField}"          property="text" minLength="2" required="true" />
              <mx:StringValidator id="vAddressValidator"          source="{vAddressField}"          property="text" minLength="5" required="true" />
              <mx:StringValidator id="cPersonValidator" source="{cPersonField}"          property="text" minLength="2" required="true" />
              <mx:StringValidator id="cAddressValidator"          source="{cAddressField}"          property="text" minLength="5" required="true" />
              <mx:Grid width="575" height="211">
                        <mx:GridRow width="575" height="211">
                                  <mx:GridItem width="301" height="235">
                                            <mx:Form width="301" height="208">
                                                      <mx:FormItem label="Visitor's Type">
                                                                <mx:ComboBox id="vTypeField" text="{visitor.vType}" change="validateForm(event);" editable="true">
                                                                          <mx:Array>
                                                                                    <mx:String></mx:String>
                                                                                    <mx:String>Contractor</mx:String>
                                                                                    <mx:String>Supplier</mx:String>
                                                                                    <mx:String>Transporter</mx:String>
                                                                                    <mx:String>Plant</mx:String>
                                                                                    <mx:String>Non-Plant</mx:String>
                                                                          </mx:Array>
                                                                </mx:ComboBox>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Visit Purpose">
                                                                <mx:ComboBox id="vPurposeField" text="{visitor.vPurpose}" change="validateForm(event);" editable="true">
                                                                          <mx:Array>
                                                                                    <mx:String></mx:String>
                                                                                    <mx:String>Official</mx:String>
                                                                                    <mx:String>Personal</mx:String>
                                                                          </mx:Array>
                                                                </mx:ComboBox>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Visitor's Name">
                                                                <mx:TextInput id="vNameField"  text="{visitor.vName}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Address">
                                                                <mx:TextInput id="vAddressField"   text="{visitor.vAddress}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Contact Person">
                                                                <mx:TextInput id="cPersonField"  text="{visitor.cPerson}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      <mx:FormItem label="Address">
                                                                <mx:TextInput id="cAddressField"  text="{visitor.cAddress}" change="validateForm(event);"/>
                                                      </mx:FormItem>
                                                      </mx:Form>
                                  </mx:GridItem>
                                  <mx:GridItem width="264" height="193">
                                            <mx:Grid width="241" height="206">
                                                      <mx:GridRow width="100%" height="100%">
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center" verticalAlign="middle">
                                                                          <mx:Panel width="100" height="132" title="Snap" id="preview" layout="absolute"/>
                                                                </mx:GridItem>
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center" verticalAlign="middle">
                                                                          <mx:Panel width="100" height="132" title="Preview" id="imageViewer"  layout="absolute"/>
                                                                </mx:GridItem>
                                                      </mx:GridRow>
                                                      <mx:GridRow width="100%" height="27" >
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center">
                                                                          <mx:Button id="snapshot" x="2" width="106" height="27" label="Snap"
                                                                                                  click="takeSnapshot();"/>
                                                                </mx:GridItem>
                                                                <mx:GridItem width="100%" height="100%" horizontalAlign="center">
                                                                          <mx:Button id="deleteButton" x="1" width="106" height="27" label="Delete"
                                                                                                  click="deleteSnapshot();"/>
                                                                </mx:GridItem>
                                                      </mx:GridRow>
                                            </mx:Grid>
                                  </mx:GridItem>
                        </mx:GridRow>
              </mx:Grid>
              <mx:ControlBar height="40" horizontalAlign="center">
                        <mx:Button label="Save Visitor"          id="submitButton" enabled="{formIsValid}" click="saveVisitor();" />
                        <mx:Button label="Clear form" enabled="{!formIsEmpty}"          click="clearFormHandler();" />
                        <mx:Button label="Cancel" click="PopUpManager.removePopUp(this);"/>
                        <mx:Label width="211" id="state"/>
              </mx:ControlBar>
              <mx:Text text="{message}" fontWeight="bold" width="300"/>
    </mx:TitleWindow>
    ListVisitors.mxml
    <?xml version="1.0" encoding="utf-8"?>
    <mx:Panel
              xmlns:mx="http://www.adobe.com/2006/mxml"
              xmlns:view="com.visitor.view.*"
              width="100%"
              height="100%"
              title="Visitor Management System - Found {visitorRecords} visitors."
              creationComplete="loadVisitors();">
              <mx:RemoteObject id="loaderService" destination="visitorService" result="handleLoadResult(event)"          fault="handleFault(event)" showBusyCursor="true" />
              <mx:RemoteObject id="deleteService" destination="visitorService" result="handleDeleteResult(event)"          fault="handleFault(event)" showBusyCursor="true" />
              <mx:Script>
                        <![CDATA[
                                  import com.visitor.vo.Visitor;
                                  import mx.controls.Alert;
                                  import mx.managers.PopUpManager;
                                  import mx.containers.TitleWindow;
                                  import mx.collections.ArrayCollection;
                                  import mx.rpc.events.ResultEvent;
                                  import mx.rpc.events.FaultEvent;
                                  [Bindable]
                                  private var message:String;
                                  [Bindable]
                                  private var visitors:ArrayCollection = new ArrayCollection();
                                  [Bindable]
                                  private var visitorRecords:int = 0;
                                  public function loadVisitors():void {
                                            loaderService.getVisitors();
                                  private function deleteVisitor():void {
                                            if(dataGrid.selectedItem != null) {
                                                      var selectedItem:Visitor = dataGrid.selectedItem as Visitor;
                                                      deleteService.deleteVisitor(selectedItem.visitorId);
                                  private function createVisitor():void {
                                            var titleWindow:VisitorEntryForm = VisitorEntryForm(PopUpManager.createPopUp(this, VisitorEntryForm, true));
                                            titleWindow.setStyle("borderAlpha", 0.9);
                                            titleWindow.formIsEmpty = true;
                                  private function updateVisitor():void {
                                            var titleWindow:VisitorEntryForm = VisitorEntryForm(PopUpManager.createPopUp(this, VisitorEntryForm, true));
                                            titleWindow.setStyle("borderAlpha", 0.9);
                                            titleWindow.visitor = dataGrid.selectedItem as Visitor;
                                            titleWindow.formIsEmpty = false;
                                  private function handleLoadResult(ev:ResultEvent):void {
                                            visitors = ev.result as ArrayCollection;
                                            visitorRecords = visitors.length;
                                  private function handleDeleteResult(ev:ResultEvent):void {
                                            Alert.show("The visitor has been deleted.", "Information", Alert.OK, null, null, null, Alert.OK);
                                            loadVisitors();
                                  private function handleFault(ev:FaultEvent):void {
                                            message = "Error: "
                                                      + ev.fault.faultCode + " - "
                                                      + ev.fault.faultDetail + " - "
                                                      + ev.fault.faultString;
                        ]]>
              </mx:Script>
              <mx:VBox width="100%" height="100%">
                        <mx:Label text="{message}" fontWeight="bold" includeInLayout="false" />
                        <mx:DataGrid
                                  id="dataGrid"
                                  width="100%"
                                  height="100%"
                                  dataProvider="{visitors}"
                                  doubleClickEnabled="true"
                                  doubleClick="updateVisitor()" >
                                  <mx:columns>
                                            <mx:DataGridColumn dataField="visitorId"          headerText="Visitor ID" width="100"/>
                                            <mx:DataGridColumn dataField="vType"                    headerText="Visitor's Type" />
                                            <mx:DataGridColumn dataField="vPurpose"           headerText="Visit Purpose" />
                                            <mx:DataGridColumn dataField="vName"                     headerText="Visitor's Name" />
                                            <mx:DataGridColumn dataField="vAddress"                    headerText="Visitor's Address" />
                                            <mx:DataGridColumn dataField="cPerson"                     headerText="Contact Person" />
                                            <mx:DataGridColumn dataField="cAddress"                    headerText="Contact Address" />
                                            <mx:DataGridColumn dataField="timeIn"                     headerText="Time-In" />
                                            <mx:DataGridColumn dataField="timeOut"                     headerText="Time-Out" />
                                            <mx:DataGridColumn dataField="vPhoto"                     headerText="Visitor's Photo" />
                                  </mx:columns>
                        </mx:DataGrid>
                        <mx:ControlBar horizontalAlign="center">
                                  <mx:Button label="Create Visitor"          click="createVisitor()"          toolTip="Create a new visitor and store it in the database." />
                                  <mx:Button label="Update Visitor"          click="updateVisitor()"           enabled="{dataGrid.selectedItem}" toolTip="Update an existing database visitor." />
                                  <mx:Button label="Delete Visitor"          click="deleteVisitor()"          enabled="{dataGrid.selectedItem}" toolTip="Delete the visitor from the database." />
                                  <mx:Button label="Reload Data"                    click="loadVisitors()"           toolTip="Reload the visitor list from the database." />
                        </mx:ControlBar>
              </mx:VBox>
    </mx:Panel>
    Visitor.as
    package com.visitor.vo
              import mx.controls.Image;
              import spark.primitives.BitmapImage;
              [Bindable]
              [RemoteClass(alias="com.visitor.Visitor")]
              public class Visitor
                        public function Visitor()
                        public var visitorId:Number;
                        public var vType:String;
                        public var vPurpose:String;
                        public var vName:String;
                        public var vAddress:String;
                        public var cPerson:String;
                        public var cAddress:String;
                        public var timeIn:Date;
                        public var timeOut:Date;
                       public var vPhoto: Image;
    Visitor.java
    package com.visitor;
    import java.sql.Blob;
    import java.sql.Timestamp;
    import javax.persistence.Basic;
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;
    import javax.persistence.Id;
    import javax.persistence.NamedQueries;
    import javax.persistence.NamedQuery;
    import javax.persistence.Table;
    import org.hibernate.annotations.Index;
    @Entity
    @Table(name = "visitors")
    @NamedQueries( {
                        @NamedQuery(name = "visitors.findAll", query = "from Visitor"),
                        @NamedQuery(name = "visitors.byId", query = "select v from Visitor v where v.visitorId= :visitorId") })
    public class Visitor {
              @Id
              @GeneratedValue(strategy = GenerationType.AUTO)
              @Column(name = "visitorId", nullable = false)
              private Long visitorId;
              @Basic
              @Index(name = "vType_idx_1")
              @Column(name = "vType", nullable = true, unique = false)
              private String vType;
              @Basic
              @Column(name = "vPurpose", nullable = true, unique = false)
              private String vPurpose;
              @Basic
              @Column(name = "vName", nullable = true, unique = false)
              private String vName;
              @Basic
              @Column(name = "vAddress", nullable = true, unique = false)
              private String vAddress;
              @Basic
              @Column(name = "cPerson", nullable = true, unique = false)
              private String cPerson;
              @Basic
              @Column(name = "cAddress", nullable = true, unique = false)
              private String cAddress;
              @Basic
              @Column(name = "timeIn", nullable = false, unique = false)
              private Timestamp timeIn;
              @Basic
              @Column(name = "timeOut", nullable = true, unique = false)
              private Timestamp timeOut;
              @Basic
              @Column(name = "vPhoto", nullable = true, unique = false)
              private Blob vPhoto;
              public Visitor() {
                        super();
              public Long getVisitorId() {
                        return visitorId;
              public void setVisitorId(Long visitorId) {
                        this.visitorId = visitorId;
              public String getvType() {
                        return vType;
              public void setvType(String vType) {
                        this.vType = vType;
              public String getvPurpose() {
                        return vPurpose;
              public void setvPurpose(String vPurpose) {
                        this.vPurpose = vPurpose;
              public String getvName() {
                        return vName;
              public void setvName(String vName) {
                        this.vName = vName;
              public String getvAddress() {
                        return vAddress;
              public void setvAddress(String vAddress) {
                        this.vAddress = vAddress;
              public String getcPerson() {
                        return cPerson;
              public void setcPerson(String cPerson) {
                        this.cPerson = cPerson;
              public String getcAddress() {
                        return cAddress;
              public void setcAddress(String cAddress) {
                        this.cAddress = cAddress;
              public Timestamp getTimeIn() {
                        return timeIn;
              public void setTimeIn(Timestamp timeIn) {
                        this.timeIn = timeIn;
              public Timestamp getTimeOut() {
                        return timeOut;
              public void setTimeOut(Timestamp timeOut) {
                        this.timeOut = timeOut;
              public Blob getvPhoto() {
                        return vPhoto;
              public void setvPhoto(Blob vPhoto) {
                        this.vPhoto = vPhoto;
    VisitorService.java
    package com.visitor;
    import java.sql.Timestamp;
    import java.util.Date;
    import java.util.List;
    import javax.persistence.EntityManager;
    import javax.persistence.EntityManagerFactory;
    import javax.persistence.EntityTransaction;
    import javax.persistence.Persistence;
    import javax.persistence.Query;
    import org.apache.log4j.Logger;
    public class VisitorService {
              private static final String PERSISTENCE_UNIT = "visitor_db";
              private static Logger logger = Logger.getLogger(VisitorService.class);
              public VisitorService() {
                        super();
              public List<Visitor> getvisitors() {
                        logger.debug("** getVisitors called...");
                        EntityManagerFactory entityManagerFactory = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = entityManagerFactory.createEntityManager();
                        Query findAllQuery = em.createNamedQuery("visitors.findAll");
                        List<Visitor> visitors = findAllQuery.getResultList();
                        if (visitors != null)
                                  logger.debug("** Found " + visitors.size() + " records:");
                        return visitors;
              public void addUpdateVisitor(Visitor visitor) throws Exception {
                        logger.debug("** addUpdateVisitor called...");
                        EntityManagerFactory emf = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = emf.createEntityManager();
                        // When passing Boolean and Number values from the Flash client to a
                        // Java object, Java interprets null values as the default values for
                        // primitive types; for example, 0 for double, float, long, int, short,
                        // byte.
                        if (visitor.getVisitorId() == null          || visitor.getVisitorId() == 0) {
                                  // New consultant is created
                                  visitor.setVisitorId(null);
                                  visitor.setTimeIn(new Timestamp(new Date().getTime()));
                        } else {
                                  visitor.setTimeOut(new Timestamp(new Date().getTime()));
                                  // Existing consultant is updated - do nothing.
                        EntityTransaction tx = em.getTransaction();
                        tx.begin();
                        try {
                                  em.merge(visitor);
                                  tx.commit();
                        } catch (Exception e) {
                                  logger.error("** Error: " + e.getMessage());
                                  tx.rollback();
                                  throw new Exception(e.getMessage());
                        } finally {
                                  logger.info("** Closing Entity Manager.");
                                  em.close();
              public void deleteVisitor(Long visitorId) {
                        logger.debug("** deleteVisitor called...");
                        EntityManagerFactory emf = Persistence
                                            .createEntityManagerFactory(PERSISTENCE_UNIT);
                        EntityManager em = emf.createEntityManager();
                        Query q = em.createNamedQuery("visitors.byId");
                        q.setParameter("visitorId", visitorId);
                        Visitor visitor = (Visitor) q.getSingleResult();
                        if (visitor != null) {
                                  EntityTransaction tx = em.getTransaction();
                                  tx.begin();
                                  try {
                                            em.remove(visitor);
                                            tx.commit();
                                  } catch (Exception e) {
                                            logger.error("** Error: " + e.getMessage());
                                            tx.rollback();
                                  } finally {
                                            logger.info("** Closing Entity Manager.");
                                            em.close();
    remoting-config.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <service id="remoting-service" class="flex.messaging.services.RemotingService">
              <adapters>
                        <adapter-definition id="java-object"
                                  class="flex.messaging.services.remoting.adapters.JavaAdapter"
                                  default="true" />
              </adapters>
              <default-channels>
                        <channel ref="my-amf" />
              </default-channels>
              <!-- ADC Demo application -->
              <destination id="visitorService">
                        <properties>
                                  <source>com.visitor.VisitorService</source>
                        </properties>
              </destination>
    </service>

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