GUI event handling

I have created a class that gives employees a sick leave allowance and they can request sick leave days.I have made a GUI form template.Each employee has an ID and can request sick leave. My class is called SickLeave.Java and my GUI form is called SickGUI.java I have two text fields and three buttons. The first text field is where the employee submits their ID (which is a string) then a search for ID button searches for it. How would I start my class for this and add event handlers for an button that searches for an ID which has been entered into a text field.... I have tried and failed and keep coming up with errors.. even when I want to define the class.The class and GUI were easy, its just making my form work which is the trouble

Have you tried adding FocusListeners to the text fields? Or ActionListeners to the buttons? The FLs could fire when you leave the TF and do a query. Likewise, the AL would initiate the button's actions.

Similar Messages

GUI event handling problems appear in 1.4.1 vs. 1.3.1?

Hi,
Has anyone else experienced strange event handling problems when migrating from 1.3.1 to 1.4.1? My GUI applications that make use of Swing's AbstractTableModel suddenly don't track mouse and selection events quickly anymore. Formerly zippy tables are now very unresponsive to user interactions.
I've run the code through JProbe under both 1.3 and 1.4 and see no differences in the profiles, yet the 1.4.1 version is virtually unusable. I had hoped that JProbe would show me that some low-level event-handling related or drawing method was getting wailed on in 1.4, but that was not the case.
My only guess is that the existing installation of 1.3.1 is interfering with the 1.4.1 installation is some way. Any thoughts on that before I trash the 1.3.1 installation (which I'm slightly reluctant to do)?
My platform is Windows XP Pro on a 2GHz P4 with 1GB RAM.
Here's my test case:
import javax.swing.table.AbstractTableModel;
import javax.swing.*;
import java.awt.*;
public class VerySimpleTableModel extends AbstractTableModel
private int d_rows = 0;
private int d_cols = 0;
private String[][] d_data = null;
public VerySimpleTableModel(int rows,int cols)
System.err.println("Creating table of size [" + rows + "," + cols +
d_rows = rows;
d_cols = cols;
d_data = new String[d_rows][d_cols];
int r = 0;
while (r < d_rows){
int c = 0;
while (c < d_cols){
d_data[r][c] = new String("[" + r + "," + c + "]");
c++;
r++;
System.err.println("Done.");
public int getRowCount()
return d_rows;
public int getColumnCount()
return d_cols;
public Object getValueAt(int rowIndex, int columnIndex)
return d_data[rowIndex][columnIndex];
public static void main(String[] args)
System.err.println( "1.4..." );
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
Dimension size = new Dimension(500,500);
panel.setMinimumSize(size);
panel.setMaximumSize(size);
JTable table = new JTable(new VerySimpleTableModel(40,5));
panel.add(table);
window.getContentPane().add(panel);
window.setSize(new Dimension(600,800));
window.validate();
window.setVisible(true);
Thanks in advance!!
- Dean

Hi,
I've fixed the problem by upgrading to 1.4.1_02. I was on 1.4.1_01.
I did further narrow down the symptoms more. It seemed the further the distance from the previous mouse click, the longer it would take for the table row to highlight. So, clicking on row 1, then 2, was much faster than clicking on row 1, then row 40.
If no one else has seen this problem -- good! I wouldn't wish the tremendous waste of time I've had on anyone!
- Dean

GUI event handling of 1.4.1 vs. 1.3.1

Hi,
Has anyone else experienced strange event handling problems when migrating from 1.3.1 to 1.4.1? My GUI applications that make use of Swing's AbstractTableModel suddenly don't track mouse and selection events quickly anymore. Formerly zippy tables are now very unresponsive to user interactions.
I've run the code through JProbe under both 1.3 and 1.4 and see no differences in the profiles, yet the 1.4.1 version is virtually unusable. I had hoped that JProbe would show me that some low-level event-handling related or drawing method was getting wailed on in 1.4, but that was not the case.
My only guess is that the existing installation of 1.3.1 is interfering with the 1.4.1 installation is some way. Any thoughts on that before I trash the 1.3.1 installation (which I'm slightly reluctant to do)?
Here's my test case:
import javax.swing.table.AbstractTableModel;
import javax.swing.*;
import java.awt.*;
public class VerySimpleTableModel extends AbstractTableModel
private int d_rows = 0;
private int d_cols = 0;
private String[][] d_data = null;
public VerySimpleTableModel(int rows,int cols)
System.err.println("Creating table of size [" + rows + "," + cols +
d_rows = rows;
d_cols = cols;
d_data = new String[d_rows][d_cols];
int r = 0;
while (r < d_rows){
int c = 0;
while (c < d_cols){
d_data[r][c] = new String("[" + r + "," + c + "]");
c++;
r++;
System.err.println("Done.");
public int getRowCount()
return d_rows;
public int getColumnCount()
return d_cols;
public Object getValueAt(int rowIndex, int columnIndex)
return d_data[rowIndex][columnIndex];
public static void main(String[] args)
System.err.println( "1.4..." );
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
Dimension size = new Dimension(500,500);
panel.setMinimumSize(size);
panel.setMaximumSize(size);
JTable table = new JTable(new VerySimpleTableModel(40,5));
panel.add(table);
window.getContentPane().add(panel);
window.setSize(new Dimension(600,800));
window.validate();
window.setVisible(true);
Thanks in advance!!
- Dean

Hi,
I've fixed the problem by upgrading to 1.4.1_02. I was on 1.4.1_01.
I did further narrow down the symptoms more. It seemed the further the distance from the previous mouse click, the longer it would take for the table row to highlight. So, clicking on row 1, then 2, was much faster than clicking on row 1, then row 40.
If no one else has seen this problem -- good! I wouldn't wish the tremendous waste of time I've had on anyone!
- Dean

Question on program structure about event handling in nested JPanels in GUI

Hi All,
I'm currently writing a GUI app with a wizard included in the app. I have one class that acts as a template for each of the panels in the wizard. That class contains a JPanel called contentsPanel that I intend to put the specific contents into. I also want the panel contents to be modular so I have a couple of classes for different things, e.g. name and address panel, etc. these panels will contain checkboxes and the like that I want to event listeneres to watch out for. Whats the best way of implementing event handling for panel within panel structure? E.g for the the checkbox example,would it be a good idea to have an accessor method that returns the check book object from the innerclass/panel and use an addListener() method on the returned object in the top level class/panel. Or is it better to have the event listeners for those objects in the same class? I would appreciate some insight into this?
Regards!

MyMainClass.main(new String[] { "the", "arguments" });
// or, if you defined your main to use varags (i.e. as "public static void main(String... args)") then you can just use
MyMainClass.main("the", "arguments");But you should really extract your functionality out of the main method into meaningful classes and methods and just use those from both your console code and your GUI code.

Where can I find an event handling for non gui purposes good tutorial

Hello to all, I am searching the net for a good tutorial about java Event and Event handling that is not GUI related.
All I find on the net are tutorial and examples that are related to GUI components the has pre defined events and handlers.
please help me find good material to learn from.
Appreciate it a lot.
Dan

I'd say goto the Java tutorial (www.thejavatutorial.com) and check up from there. Just because most event handleing is done in GUI's (swing comes to mind) doesn't imply its limited to that. For an example, check out the JavaBeans trail. Beans have ways to communicate with each other when (for example) a change in the bean occurs. Thats done through an event yet isn't related to GUI's in any way.

Problem with event handling

Hello all,
I have a problem with event handling. I have two buttons in my GUI application with the same name.They are instance variables of two different objects of the same class and are put together in the one GUI.And their actionlisteners are registered with the same GUI. How can I differentiate between these two buttons?
To be more eloborate here is a basic definition of my classes
class SystemPanel{
         SystemPanel(FTP ftp){ app = ftp};
         FTP app;
         private JButton b = new JButton("ChgDir");
        b.addActionListener(app);
class FTP extends JFrame implements ActionListener{
           SystemPanel rem = new SystemPanel(this);
           SystemPanel loc = new SystemPanel(this);
           FTP(){
                   add(rem);
                   add(loc);
                   pack();
                   show();
       void actionPerformed(ActionEvent evt){
        /*HOW WILL I BE ABLE TO KNOW WHICH BUTTON WAS PRESSED AS THEY
           BOTH HAVE SAME ID AND getSouce() ?
           In this case..it if was from rem or loc ?
} It would be really helpful if anyone could help me in this regard..
Thanks
Hari Vigensh

Hi levi,
Thankx..
I solved the problem ..using same concept but in a different way..
One thing i wanted to make clear is that the two buttons are in the SAME CLASS and i am forming 2 different objects of the SAME class and then putting them in a GUI.THERE IS NO b and C. there is just two instances of b which belong to the SAME CLASS..
So the code
private JButton b = new JButton("ChgDir");
b.setActionCommand ("1");
wont work as both the instances would have the label "ChgDir" and have setActionCommand set to 1!!!!
Actually I have an array of buttons..So I solved the prob by writting a function caled setActionCmdRemote that would just set the action commands of one object of the class differently ..here is the code
public void setActionCommandsRemote()
     for(int i = 0 ; i <cmdButtons.length ; i++)
     cmdButtons.setActionCommand((cmdButtons[i].getText())+"Rem");
This just adds "rem" to the existing Actioncommand and i check it as folows in my actionperformed method
     if(button.getActionCommand().equals("DeleteRem") )
                    deleteFileRemote();
      else if(button.getActionCommand().equals("Delete") )
                 deleteFileLocal();Anyway thanx a milion for your help..this was my first posting and I was glad to get a prompt reply!!!

Event handling in seperate class

hello... i have a gui w/ a series of combo boxes, text fields, etc. (call this the GUI file)
upon pressing a button, i need to run a series of event handling that will use info from many of these components
i would like to create a separate java file for the button event handling, but need this file to have access to many componets in the GUI file - does anyone know a nice way to do this?

i'm not quite sure how to do that... in my GUI class,
I construct the actuall gui within the constructor..
then i have a simple driver that creates an instance
of class GUI and calls the constructor... how can I
pass a reference of the GUI to the handler in that
scenario??it would be better if you post your code. Some people like me can't just imagine.

Event handling in Dynpage

Hi all,
This is my first post in SDN.
Can any one tell me how to submit a form in DYNPAGE via radio button. If I check the radio button on, it should submit the form and should return the same page.
Appreciate you help.
Thanks,
Karthik

Hi,
The following code regarding Event Handling for Dynpage. May be this example code useful for you.
package com.customer.training;
import com.sapportals.htmlb.Button;
import com.sapportals.htmlb.Component;
import com.sapportals.htmlb.DropdownListBox;
import com.sapportals.htmlb.Form;
import com.sapportals.htmlb.FormLayout;
import com.sapportals.htmlb.GridLayout;
import com.sapportals.htmlb.InputField;
import com.sapportals.htmlb.Label;
import com.sapportals.htmlb.TextView;
import com.sapportals.htmlb.enum.ButtonDesign;
import com.sapportals.htmlb.enum.TextViewDesign;
import com.sapportals.htmlb.event.Event;
import com.sapportals.htmlb.page.DynPage;
import com.sapportals.htmlb.page.PageException;
import com.sapportals.htmlb.rendering.IPageContext;
import com.sapportals.portal.htmlb.page.PageProcessorComponent;
public class Suresh_SearchDynPage extends PageProcessorComponent {
public DynPage getPage() {
    return new Suresh_SearchDynPageDynPage();
public static class Suresh_SearchDynPageDynPage extends DynPage {
     public int flag ;
     public final static int disp_info = 1;
     public final static int read_info = 2;
     public final static int error_info = 3;
     public static String flag_info = "MyFlag";
     public static String disp_drop = " ";
     public String errorMessage;
     String firstName ;
     String lastName ;
     String Email ;
     String dropsel;
Initialization code executed once per user.
    public void doInitialization() {
                    flag = read_info;
                    IPageContext ctx = this.getPageContext();
                    ctx.setAttribute("FirstName","");
                    ctx.setAttribute("LastName","");
                    ctx.setAttribute("email","");
Input handling code. In general called the first time with the second page request from the user.
    public void doProcessAfterInput() throws PageException {
          Component comp;
          comp = this.getComponentByName("FirstName");
          if (comp instanceof InputField)
                    firstName = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("LastName");
          if (comp instanceof InputField)
                              lastName = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("email");
                    if (comp instanceof InputField)
                                        Email = ((InputField) comp).getString().getValue();
          comp = this.getComponentByName("DisplayType");
                    if (comp instanceof DropdownListBox)
                         dropsel = ((DropdownListBox) comp).getSelection();
// Store the selected values in corresponding field name for nextScreen
          IPageContext ctx = this.getPageContext();
          flag = new Integer(ctx.getAttribute(flag_info).toString()).intValue();
          ctx.setAttribute("FirstName",firstName);
          ctx.setAttribute("LastName",lastName);
          ctx.setAttribute("email",Email);
          ctx.setAttribute("DisplayName",dropsel);
Create output. Called once per request.
    public void doProcessBeforeOutput() throws PageException {
      Form myForm = this.getForm();
       this.getPageContext().setAttribute(flag_info,new Integer(flag));
     switch(flag)
      case read_info:
                FormLayout f1 = new FormLayout();
                TextView t1 = new TextView();
                t1.setDesign(TextViewDesign.HEADER2);
                t1.setText("This is the Info U Entered................");
                TextView t2 = new TextView();
                t2.setText(firstName);
                Label dispFname = new Label("dispFirstName");
                dispFname.setText("First Name");
                dispFname.setLabelFor(t2);
                TextView t3 = new TextView();
                t3.setText(lastName);
                Label dispLname = new Label("dispLastName");
                dispLname.setText("Last Name");
                dispLname.setLabelFor(t3);
                TextView t4 = new TextView();
                t4.setText(Email);
                Label dispEmail = new Label("dispEmail");
                dispEmail.setText("Email");
                dispEmail.setLabelFor(t4);
                TextView t5 = new TextView();
                t5.setText(dropsel);
                Label dispType = new Label("dispInfo");
                dispType.setText("Display Info");
                dispType.setLabelFor(t5);
                Button btnback = new Button("Back");
                btnback.setText("Back");
                btnback.setOnClick("Back");
                f1.addComponent(1,1,t1);
                f1.addComponent(2,1,dispFname);
                f1.addComponent(2,2,t2);
                f1.addComponent(3,1,dispLname);
                f1.addComponent(3,2,t3);
                f1.addComponent(4,1,dispEmail);
                f1.addComponent(4,2,t4);
                f1.addComponent(5,1,dispType);
                f1.addComponent(5,2,t5);
                f1.addComponent(6,1,btnback);
                myForm.addComponent(f1);
           break;
      case error_info:
                FormLayout f2 = new FormLayout();
                IPageContext ctx = this.getPageContext();
                TextView t6 = new TextView();
                t6.setText("Error : ");
                t6.setDesign(TextViewDesign.HEADER2);
                t6.setText(errorMessage);
                f2.addComponent(3,1,t6);
                myForm.addComponent(f2);
           break;
            default:
                          // create your GUI here....
                                    GridLayout g1 = new GridLayout();
//                                    IPageContext ctx1 = this.getPageContext();
                                    Label first_l = new Label("First Name");
                                    InputField first_if = new InputField("FirstName");
                                    Label last_l = new Label("Last Name");
                                    InputField last_if = new InputField("LastName");
                                    Label email_l = new Label("E-Mail Address");
                                    InputField email_if = new InputField("email");
                                    Label info_l = new Label("Display Info for");
                                    DropdownListBox displayType = new DropdownListBox("DisplayType");
                                    displayType.addItem("userinfo", "User Info");
                                    displayType.addItem("groupinfo", "Group Membership");
                                    displayType.addItem("roleinfo", "Role Assignment");
//                                    displayType.setSelection(ctx1.getAttribute("DisplayType").toString());
                                    Button btn = new Button("submit");
                                    btn.setText("Get Info");
                                    btn.setDesign(ButtonDesign.EMPHASIZED);
                                    btn.setOnClick("Get");
//                                    add the ui controls to grid
                                    g1.setCellPadding(4);
                                    g1.addComponent(1,1,first_l);
                                    g1.addComponent(1,2,first_if);
                                    g1.addComponent(2,1,last_l);
                                    g1.addComponent(2,2,last_if);
                                    g1.addComponent(3,1,email_l);
                                    g1.addComponent(3,2,email_if);
                                    g1.addComponent(4,1,info_l);
                                    g1.addComponent(4,2,displayType);
                                    g1.addColSpanComponent(5,1,btn,2);
                                    g1.setHeightPercentage(50);
                                    g1.setColumnSize(50);
                                    myForm.setFocusedControl(displayType);
                                    myForm.setMessageBarAtFormEnd(true);
                                    myForm.setWidthInHundredPercent(true);
                                    myForm.addComponent(g1);
                                    break;
    public void onGet(Event e)
     if(firstName.length()== 0)
          flag = error_info;
          errorMessage = "Invalid Input..............";
     else
          flag = read_info;
      public void onBack(Event e1)
            flag = disp_info;

Event Handler not found -OIM 9102

Hi Experts,
I'm facing a problem while creating a user manually in OIM. Everytime I try to manually create a user, an error message is displayed on the GUI saying, "DOBJ.EVT_NOT_FOUND
Event Handler not found".
On checking the logs, this is what I get there. Since I'm a newbie, I'm not able to figure out what's happening.
Any help would be great.
java.sql.SQLIntegrityConstraintViolationException: ORA-01400: cannot insert NULL into ("XELADM"."UPA_USR"."ACT_KEY")
     at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:85)
     at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
     at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)
     at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)
     at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1030)
     at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)
     at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:947)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1222)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
     at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3462)
     at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1349)
     at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:365)
     at com.thortech.xl.dataaccess.tcDataBase.writePreparedStatement(Unknown Source)
     at com.thortech.xl.dataobj.PreparedStatementUtil.executeUpdate(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.insertUserProfile(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.processUserProfileChanges(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.processAuditData(Unknown Source)
     at com.thortech.xl.audit.genericauditor.GenericAuditor.processAuditMessage(Unknown Source)
     at com.thortech.xl.audit.engine.AuditEngine.processSingleAudJmsEntry(Unknown Source)
     at com.thortech.xl.audit.engine.AuditEngine.processOfflineNew(Unknown Source)
     at com.thortech.xl.audit.engine.jms.XLAuditMessageHandler.execute(Unknown Source)
     at com.thortech.xl.schedule.jms.messagehandler.MessageProcessUtil.processMessage(Unknown Source)
     at com.thortech.xl.schedule.jms.messagehandler.AuditMessageHandlerMDB.onMessage(Unknown Source)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.invocation.Invocation.performCall(Invocation.java:359)
     at org.jboss.ejb.MessageDrivenContainer$ContainerInterceptor.invoke(MessageDrivenContainer.java:495)
     at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158)
     at org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor.invoke(MessageDrivenInstanceInterceptor.java:116)
     at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)
     at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)
     at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)
     at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
     at org.jboss.ejb.plugins.RunAsSecurityInterceptor.invoke(RunAsSecurityInterceptor.java:109)
     at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
     at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
     at org.jboss.ejb.MessageDrivenContainer.internalInvoke(MessageDrivenContainer.java:402)
     at org.jboss.ejb.Container.invoke(Container.java:960)
     at org.jboss.ejb.plugins.jms.JMSContainerInvoker.invoke(JMSContainerInvoker.java:1092)
     at org.jboss.ejb.plugins.jms.JMSContainerInvoker$MessageListenerImpl.onMessage(JMSContainerInvoker.java:1392)
     at org.jboss.jms.asf.StdServerSession.onMessage(StdServerSession.java:266)
     at org.jboss.mq.SpyMessageConsumer.sessionConsumerProcessMessage(SpyMessageConsumer.java:906)
     at org.jboss.mq.SpyMessageConsumer.addMessage(SpyMessageConsumer.java:170)
     at org.jboss.mq.SpySession.run(SpySession.java:323)
     at org.jboss.jms.asf.StdServerSession.run(StdServerSession.java:194)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:761)
     at java.lang.Thread.run(Thread.java:619)
2011-03-18 15:55:01,283 ERROR [XELLERATE.AUDITOR] Class/Method: UserProfileRDGenerator/insertUserProfile encounter some problems: Failed to insert user profile record in table UPA_USR for auditee 5943
2011-03-18 15:55:01,283 ERROR [XELLERATE.AUDITOR] Class/Method: UserProfileRDGenerator/insertUserProfile encounter some problems: {1}
com.thortech.xl.orb.dataaccess.tcDataAccessException
     at com.thortech.xl.dataaccess.tcDataAccessExceptionUtil.createException(Unknown Source)
     at com.thortech.xl.dataaccess.tcDataBase.createException(Unknown Source)
     at com.thortech.xl.dataaccess.tcDataBase.writePreparedStatement(Unknown Source)
     at com.thortech.xl.dataobj.PreparedStatementUtil.executeUpdate(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.insertUserProfile(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.processUserProfileChanges(Unknown Source)
     at com.thortech.xl.audit.auditdataprocessors.UserProfileRDGenerator.processAuditData(Unknown Source)
     at com.thortech.xl.audit.genericauditor.GenericAuditor.processAuditMessage(Unknown Source)
     at com.thortech.xl.audit.engine.AuditEngine.processSingleAudJmsEntry(Unknown Source)
     at com.thortech.xl.audit.engine.AuditEngine.processOfflineNew(Unknown Source)
     at com.thortech.xl.audit.engine.jms.XLAuditMessageHandler.execute(Unknown Source)
     at com.thortech.xl.schedule.jms.messagehandler.MessageProcessUtil.processMessage(Unknown Source)
     at com.thortech.xl.schedule.jms.messagehandler.AuditMessageHandlerMDB.onMessage(Unknown Source)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.invocation.Invocation.performCall(Invocation.java:359)
     at org.jboss.ejb.MessageDrivenContainer$ContainerInterceptor.invoke(MessageDrivenContainer.java:495)
     at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158)
     at org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor.invoke(MessageDrivenInstanceInterceptor.java:116)
     at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)
     at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)
     at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)
     at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
     at org.jboss.ejb.plugins.RunAsSecurityInterceptor.invoke(RunAsSecurityInterceptor.java:109)
     at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
     at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
     at org.jboss.ejb.MessageDrivenContainer.internalInvoke(MessageDrivenContainer.java:402)
     at org.jboss.ejb.Container.invoke(Container.java:960)
     at org.jboss.ejb.plugins.jms.JMSContainerInvoker.invoke(JMSContainerInvoker.java:1092)
     at org.jboss.ejb.plugins.jms.JMSContainerInvoker$MessageListenerImpl.onMessage(JMSContainerInvoker.java:1392)
     at org.jboss.jms.asf.StdServerSession.onMessage(StdServerSession.java:266)
     at org.jboss.mq.SpyMessageConsumer.sessionConsumerProcessMessage(SpyMessageConsumer.java:906)
     at org.jboss.mq.SpyMessageConsumer.addMessage(SpyMessageConsumer.java:170)
     at org.jboss.mq.SpySession.run(SpySession.java:323)
     at org.jboss.jms.asf.StdServerSession.run(StdServerSession.java:194)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:761)
     at java.lang.Thread.run(Thread.java:619)
Thanks,
Nikhil

Check for the ACT_KEY in the USR table in the database for User with the key 5943. It should not be null. Just a hunch by looking at the error and of course as Kevin said, you need to truncate the jms stuff.
-Bikash

Event handler eats up memory. Bad programing and/or bug.

Hello
I've been programming a GUI for a project. The basics of the program is a sample routine that updates a array once a second. Once the array is updated I use a event handler to plot the new array in a graph.
When I wrote this gui I think I've stumbled upon a bug in Labviews memory allocation.
If you have two loops. One that builds a array and then signals a loop with a eventhandler that reads the array and the event handler is stoped for a few seconds (by opening a sub vi or something inside the event handler), the memory goes berserk. When the event handler is free after the stop the memory is still allocated and does not return.
I could not find any information on this problem in the forum so I thought I would share this information with everyone. I managed to reproduce this phenomena in a small example (attached), if anyone is interested in it. The problem is simple to fix once you recognize the problem. However it was not the simplest problem to find (imho that is ).
Regards
Andreas Beckman
Attachments:
bug.zip ‏23 KB

Where are you seeing the memory being allocated? What tool are you using, task manager or LabVIEW profiling? I'm not seeing what you describe (LV 7.1.1 on a 3.4 GHz Pentium 4 w/ 1 Gb memory)
Thanks,
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion

Event handler for STDIN input?

Hi,
This question will probably require a bit of context - I'm attempting to re-implement in java an application that's currently written in perl. The application is a server helper app that rewriters urls; it receives a request ID and a URL on stdin, does the necessary munging (which can require an external SOAP query), then returns the resulting rewritten URL.
Since the results can be asynchronous due to the need for external queries to build the result, this is currently a multithreaded perl app implemented using perl's POE framework to register an event handler for stdin. That handler fires each time a line of input is received, then feeds the query to a thread pool manager (POE::Component::Pool::Thread, which is conceptually similar to the Executor frameworks). The thread returns the result as a callback registered to another function in the main thread, which then populates the query/result to a cache then outputs the result (with the original query ID) on stdout. Since stdin input and the result callbacks are event-driven, there's no while(true) main loop or other blocking mechanism in the main thread. Unfortunately, it's perl-ness is causing problems due to perl's threading implementation (three words: "copy on init"), so we need to reimplement in a language with a more robust threading implementation (preferably one with copy-on-write for shared objects). So, Java it is.
So far everything's been good - Executor, Callables, and Futures work as I hoped they would for proper thread management, and the internal worker thread logic (XML processing, SOAP, regular expressions, etc) is proving rather simple to adapt. However, the main roadblock I'm hitting is that so far, I have not found a way to register any sort of event handler for STDIN input (or more specifically, InputStreamReader/BufferedStreamReader events). This could be due to search engine pollution - everything I see when I search for documentation on event listeners appears to be GUI-specific (buttons, menus, text areas/forms, etc). I'm just looking for a way to handle a line of STDIN, not a text area on a form.
Any pointers in the right direction will be much appreciated!

rekoil wrote:
Maybe I need to rethink the design here...
The main reason I used a callback in the original perl is that there's a large cache structure that gets checked before the thread dispatch, and only cache misses get pushed to a thread for processing. Callbacks from the threads will then add its results to the cache. Thanks to perl's thread model, when I attempted to make the cache a shared structure - in perl, you have to explicitly mark as "shared" variables that you want visible to all threads - the structure wound up getting copied to every thread, and this gave the app an unacceptable memory footprint. So the solution was to use a callback in the main thread to update the cache.
I'm now thinking that if Java's thread model is a bit saner (i.e. a shared object doesn't get copied into every thread), then I could just have each thread update the cache, print its output to STDOUT directly, and avoid the need for the callback. I can then make my input loop simply a while() loop, waiting for the next input to dispatch. Sound sane?Yes I think so.
There is some of this I still don't entirely understand. Your loop sounds better now but it sounds to me like the process is this.
1) read from in
2) call some stuff on the basis of what came in
3) do work
4) workers produce things
5) things written back out
6) read back in??
If you're just going in/out then great. If you are going in/out/in then maybe some sort of PipedInput/Output Streams? It may well be that I got lost in your explanation in which case never mind.

Forcing PAI processing in the absence of a local event handler

I have a dynpro screen with a splitter container on it.
Each side is populated with a readonly gui object (of cl_gui_textedit and cl_gui_alv_grid).
No special event handling had been enabled for these objects.
I have an application toolbar button defined in the gui status as an application event.
When I click the button, I do not go into PAI processing. (buttons defined as exit commands do hit PAI)
Is there a way to force PAI processing here in the absence of a local event handler, or I must I implement one.   If so, to what event would it respond as I am not hitting a gui control.
( Is there a way to force a set_new_okay_code into it? )
Thanks...
...Mike

Mike,
Not sure 100% of what you are asking, however, I'll respond in hopes of a hit.
The ALV Grid allows you to create events in the initialization of the grid. You build a line for USER_COMMAND and can respond to an event in a FORM you have in your program that
looks something like the following.
FORM user_command
        USING p_ucomm LIKE sy-ucomm
              p_selfield TYPE slis_selfield.
CASE P_UCOMM.
WHEN .....
Generally, when I use this routine, I add the buttons to the ALV's Toolbar and respond to it in the USER_COMMAND form.
The routines I've provided here come from a report program, but the concept is the same for the
ALV_GRID OO that you are likely using.

Event Handling Help needed please.

Hi,
I am writing a program to simulate a supermarket checkout. I have done the GUI and now i am trying to do the event handling. I have come up against a problem.
I have a JCombobox called prodList and i have added an string array to it called prods . I have also created 2 more arrays with numbers in them.
I want to write the code for if an item is selected from the combo box that the name from the array is shown in a textfield tf1, and also the price and stock no which correspond to the seclected item (both initialised in the other arrays) are also added to the textfield tf1.
I have started writng the code but i am really stuck. Could someone please help me with this please. The code i have done so far is as follows(just the event handling code shown)
          public void ItemStateChange(ItemEvent ie){
          if(ie.getItemSelected()== prodList)
               changeOutput();
          public void changeOutput()
               if(ItemSelected ==0)
                    tf1.setText("You have selected" +a +b +c);
     }

Do you say this because i missed the d of ItemStateChanged ?
I have amended that but still i am getting the same errors class or enum expected. 4 of them relating to the itemStateChanged method.
i will post my whole code if it helps
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Observer; //new
import java.util.Observable;//new
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class MySuperMktPro
     public MySuperMktPro()
          CheckoutView Check1 = new CheckoutView(1,0,0);
          CheckoutView Check2 = new CheckoutView(2,300,0);
          CheckoutView Check3 = new CheckoutView(3,600,0);
          CheckoutView Check4 = new CheckoutView(4,0,350);
          CheckoutView Check5 = new CheckoutView(5,600,350);
          OfficeView off111 = new OfficeView();
    public static void main(String[] args) {
         // TODO, add your application code
         System.out.println("Starting My Supermarket Project...");
         MySuperMktPro startup = new MySuperMktPro();
    class CheckoutView implements ItemListener , ActionListener
    private OfficeView off1;
     private JFrame chk1;
     private Container cont1;
     private Dimension screensize,tempDim;
     private JPanel pan1,pan2,pan3,pan4,pan5;
     private JButton buyBut,prodCode;
     private JButton purchase,cashBack,manual,remove,disCo;
     private JButton but1,but2,finaLi1,but4,but5,but6;
     private JTextArea tArea1,tArea2;
     private JTextField tf1,tf2,tf3,list2;
     private JComboBox prodList;
     private JLabel lab1,lab2,lab3,lab4,lab5,lab6,lab7;
     private int checkoutID; //New private int for all methods of this class
     private int passedX,passedY;
     private String prods[];
     private JButton rb1,rb2,rb3,rb4;
     private double price[];
     private int code[];
     public CheckoutView(int passedInteger,int passedX,int passedY)
          checkoutID = passedInteger; //Store the int passed into the method
        this.passedX = passedX;
        this.passedY = passedY;
          drawCheckoutGui();
     public void drawCheckoutGui()
          prods= new String[20];
          prods[0] = "Beans";
          prods[1] = "Eggs";
          prods[2] = "bread";
          prods[3] = "Jam";
          prods[4] = "Butter";
          prods[5] = "Cream";
          prods[6] = "Sugar";
          prods[7] = "Peas";
          prods[8] = "Milk";
          prods[9] = "Bacon";
          prods[10] = "Spaghetti";
          prods[11] = "Corn Flakes";
          prods[12] = "Carrots";
          prods[13] = "Oranges";
          prods[14] = "Bananas";
          prods[15] = "Snickers";
          prods[16] = "Wine";
          prods[17] = "Beer";
          prods[18] = "Lager";
          prods[19] = "Cheese";
          for(i=0; i<prods.length;i++);
          code = new int [20];
          code[0] = 1;
          code[1] = 2;
          code[2] = 3;
          code[3] = 4;
          code[4] = 5;
          code[5] = 6;
          code[6] = 7;
          code[7] = 8;
          code[8] = 9;
          code[9] = 10;
          code[10] = 11;
          code[11] = 12;
          code[12] = 13;
          code[13] = 14;
          code[14] = 15;
          code[15] = 16;
          code[16] = 17;
          code[17] = 18;
          code[18] = 19;
          code[19] = 20;
          for(b=0; b<code.length; b++);
          price = new double [20];
          price[0] = 0.65;
          price[1] = 0.84;
          price[2] = 0.98;
          price[3] = 0.75;
          price[4] = 0.45;
          price[5] = 0.65;
          price[6] = 1.78;
          price[7] = 1.14;
          price[8] = 0.98;
          price[9] = 0.99;
          price[10] = 0.98;
          price[11] = 0.65;
          price[12] = 1.69;
          price[13] = 2.99;
          price[14] = 0.99;
          price[15] = 2.68;
          price[16] = 0.89;
          price[17] = 5.99;
          price[18] = 1.54;
          price[19] = 2.99;
          for(c=0; c<code.length; c++);
          screensize = Toolkit.getDefaultToolkit().getScreenSize();
          chk1 = new JFrame();
          chk1.setTitle("Checkout #" + checkoutID); //Use the new stored int
          chk1.setSize(300,350);
          chk1.setLocation(passedX,passedY);
          chk1.setLayout(new GridLayout(5,1));
          //chk1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          cont1 = chk1.getContentPane();
          //chk1.setLayout(new BorderLayout());
             pan1 = new JPanel();
             pan2 = new JPanel();
          pan3 = new JPanel();
          pan4 = new JPanel();
          pan5 = new JPanel();
          //panel 1
          pan1.setLayout(new FlowLayout());
          pan1.setBackground(Color.black);
          prodList = new JComboBox(prods);
          prodList.setMaximumRowCount(2);
          prodList.addItemListener(this);
          but1 = new JButton("Buy");
          but1.addActionListener(this);
          lab1 = new JLabel("Products");
          lab1.setForeground(Color.white);
          lab1.setBorder(BorderFactory.createLineBorder(Color.white));
          pan1.add(lab1);
          pan1.add(prodList);
          pan1.add(but1);
          //panel 2
          pan2 = new JPanel();
          pan2.setLayout(new BorderLayout());
          pan2.setBackground(Color.black);
          lab3 = new JLabel("                                Enter Product Code");
          lab3.setForeground(Color.white);
          tArea2 = new JTextArea(8,10);
          tArea2.setBorder(BorderFactory.createLineBorder(Color.white));
          lab5 = new JLabel(" Tesco's   ");
          lab5.setForeground(Color.white);
          lab5.setBorder(BorderFactory.createLineBorder(Color.white));
          lab6 = new JLabel("Checkout");
          lab6.setForeground(Color.white);
          lab6.setBorder(BorderFactory.createLineBorder(Color.white));
          lab7 = new JLabel("You selected                      ");
          lab7.setForeground(Color.cyan);
          //lab7.setBorder(BorderFactory.createLineBorder(Color.white));
          pan2.add(lab7,"North");
          pan2.add(lab6,"East");
          pan2.add(tArea2,"Center");
          pan2.add(lab5,"West");
          pan2.add(lab3,"South");
          //panel 3
          pan3 = new JPanel();
          pan3.setLayout(new FlowLayout());
          pan3.setBackground(Color.black);
          manual = new JButton("Manual");
          manual.addActionListener(this);
          manual.setBorder(BorderFactory.createLineBorder(Color.white));
          remove = new JButton("Remove");
          remove.addActionListener(this);
          remove.setBorder(BorderFactory.createLineBorder(Color.white));
          tf1 = new JTextField(5);
          pan3.add(manual);
          pan3.add(tf1);
          pan3.add(remove);
          //panel 4
          pan4 = new JPanel();
          pan4.setLayout(new FlowLayout());
          pan4.setBackground(Color.black);
          finaLi1 = new JButton("Finalise");
     //     finaLi1.addActionListener(this);
          cashBack = new JButton("Cashback");
          JTextField list2 = new JTextField(5);
          but4 = new JButton(" Sum Total");
          but4.addActionListener(this);
          but4.setBorder(BorderFactory.createLineBorder(Color.white));
          cashBack.setBorder(BorderFactory.createLineBorder(Color.white));
          pan4.add(cashBack);
          pan4.add(list2);
          pan4.add(but4);
          //panel 5
          pan5 = new JPanel();
          pan5.setLayout(new GridLayout(2,3));
          pan5.setBackground(Color.black);
          disCo = new JButton("Discount");
          disCo.addActionListener(this);
          disCo.setBorder(BorderFactory.createLineBorder(Color.black));
          but6 = new JButton("Finalise");
          but6.addActionListener(this);
          but6.setBorder(BorderFactory.createLineBorder(Color.black));
          rb1 = new JButton("Cash");
          rb1.addActionListener(this);
          rb1.setBorder(BorderFactory.createLineBorder(Color.black));
          rb2 = new JButton("Card");
          rb2.addActionListener(this);
          rb2.setBorder(BorderFactory.createLineBorder(Color.black));
          rb3 = new JButton("Cheque");
          rb3.addActionListener(this);
          rb3.setBorder(BorderFactory.createLineBorder(Color.black));
          rb4 = new JButton("Voucher");
          rb4.addActionListener(this);
          rb4.setBorder(BorderFactory.createLineBorder(Color.black));
          pan5.add(disCo);
          pan5.add(but6);
          pan5.add(rb1);
          pan5.add(rb2);
          pan5.add(rb3);
          pan5.add(rb4);
          //add the panels to the container
          cont1.add(pan1);
          cont1.add(pan4);
          cont1.add(pan2);
          cont1.add(pan3);
          cont1.add(pan5);
          chk1.setContentPane(cont1);
          chk1.setVisible(true);
class OfficeView
     private OfficeView off111;
     private JFrame offMod1;
     private JPanel pane1;
     private JButton refill;
     private Container cont11;
     private Dimension screensize;
     private JTextField tf11,tf12;
     public OfficeView()
          drawOfficeGUI();
     public void drawOfficeGUI()
          screensize = Toolkit.getDefaultToolkit().getScreenSize();
          offMod1 = new JFrame("Office Control");
          int frameWidth = 300;
          int frameHeight = 250;
          offMod1.setSize(frameWidth,frameHeight);
          offMod1.setLocation(300,350);
          offMod1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          cont11 = offMod1.getContentPane();
          pane1 = new JPanel();
          pane1.setBackground(Color.cyan);
          refill = new JButton("Refill");
          tf11 = new JTextField(25);
          tf12 = new JTextField(25);
          pane1.add(tf11);
          pane1.add(refill);
          pane1.add(tf12);
          cont11.add(pane1);
          offMod1.setContentPane(cont11);
          offMod1.setVisible(true);
          public void ItemStateChanged(ItemEvent ie)
                    if(ie.getItemSelected()== prodList)
                              changeOutput();
          public void changeOutput()
                    if(ItemSelected ==0)
                              tf1.setText("You have selected", +a +b +c);
               }Message was edited by:
fowlergod09

Loading .EXE via event handling

I'm adding event handling to a GUI menu - the idea being that each menu item, when selected, would launch a .exe file (for test purposes 'notepad' but in reality, it could be any xp)
The operating system is XP, and JDK 1.5.0 is being used.
How do I do this? - there seems to be no information on the topic in written documentation.

Maybe this will help you a lot:
http://java.sun.com/docs/books/tutorial/index.html
Here is a direct link for using menu items:
http://java.sun.com/docs/books/tutorial/uiswing/components/menu.html
And I suggest using ProcessBuilder instead of Runtime.exec() if you are using JDK1.5.

Beginners Questions about Multiple JPanels in JFrame and event handling

I am a newbie with SWING, and even a newerbie in Event Handling. So here goes.
I am writing a maze program. I am placing a maze JPanel (MazePanel) at the center of a JFrame, and a JPanel of buttons (ButtonPanel) on the SOUTH pane. I want the buttons to be able to re-randomize the maze, solve the maze, and also ouput statistics (for percolation theory purposes). I have the backbone all done already, I am just creating the GUI now. I am just figuring out EventHandlers and such through the tutorials, but I have a question. I am adding an ActionListener to the buttons which are on the ButtonPanel which are on JFrame (SOUTH) Panel. But who do I make the ActionListener--Basically the one doing the work when the button is pressed. Do I make the JFrame the ActionListener or the MazePanel the ActionListener. I need something which has access to the maze data (the backbone), and which can call the Maze.randomize() function. I'm trying to make a good design and not just slop too.
Also I was wondering if I do this
JButton.addActionListener(MazePanel), and lets say public MazePanel implments ActionListenerdoesn't adding this whole big object to another object (namely the button actionlistener) seem really inefficient? And how does something that is nested in a JPanel on JFrame x get information from something nested in another JPanel on a JFrame x.
Basically how is the Buttons going to talk to the maze when the maze is so far away?

I'm not an expert, but here's what I'd do....
You already have your business logic (the Maze classes), you said. I'm assuming you have some kind of public interface to this business logic. I would create a new class like "MazeGui" that extends JFrame, and then create the GUI using this class. Add buttons and panels as needed to get it to look the way you want. Then for each button that does a specific thing, add an anonymous ActionListener class to it and put whatever code you need inside the ActionListener that accesses the business logic classes and does what it needs to.
This is the idea, though my code is totally unchecked and won't compile:
import deadseasquirrels.mazestuff.*;
public class MazeGui extends JFrame {
JPanel buttonPanel = new JPanel();
JPanel mazePanel = new JPanel();
JButton randomizeB = new JButton();
JButton solveB = new JButton();
JButton statsB = new JButton();
// create instanc(es) of your Maze business logic class(es)
myMaze = new MazeClass();
// add the components to the MazeGui content pane
Component cp = getContentPane();
cp.add(); // this doesn't do anything, but in your code you'd add
            // all of your components to the MazeGui's contentpane
randomizeB.addActionListener(new ActionListener {
    void actionPerformed() {
      Maze newMaze = myMaze.getRandomMazeLayout();
      mazePanel.setContents(newMaze); // this is not a real method!
                                      // it's just to give you the idea
                                      // of how to manipulate the JPanel
                                      // representing your Maze diagram,
                                      // you will probably be changing a
                                      // subcomponent of the JPanel
solveB.addActionListener(new ActionListener {
    void actionPerformed() {
      Solution mySolution = myMaze.getSolution();
      mazePanel.setContents(mySolution); // again, this is not a real
                                         // method but it shows you how
                                         // the ActionListener can
                                         // access your GUI
// repeat with any other buttons you need
public static void main(String[] args) {
    MazeGui mg = new MazeGui();
    mg.setVisible(true);
    // etc...
}

GUI event handling

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