Confused about jsp fragment call

I am trying to do some basic validation from a jsp page and then call a page fragment. I have entered this code:
<% //Validate the entered data
          if(!validateBean.validate()) { %>
          <%@ include file="addDataError.jsf" %>
     <% } else { %>
               accessBean.addData();
               if(accessBean.success()) { %>
               <%@ include file="addData1a.jsf" %>
               <% } else { %>
          <%@ include file="addData1b.jsf" %>
<% } %>
<% } %>
I suspect my problem is a basic one with something to do with the else statements. The intention is to call the validation then display a form to resubmit the info if the validation fails or add the info to the database if it passes.

Not sure, but I believe the @ include tag has its limitations, including not being able to be put into conditional blocks. You might want to try the <jsp:include> tag instead.
See http://java.sun.com/webservices/docs/ea2/tutorial/doc/JSPIntro8.html

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Another JSP Fragment bug (or JSF flaw?)

My application has a search box and go button in a JSPF fragment. But data content is rendered in a JSP. To demonstrate the problem I am going to slightly modify the Person/Trip tutorial sample:
1. Create a new project
2. Add Trip rowset to page1
3. Set criteria perseonid = ?
4. Add data table and bind it to trip rowset
5. Add Integer PersonID property to the session bean
6. Add PersonID initialization code:
personID = new Integer(1);
5. Add Page1 initialization:
try {
dataTable1Model.setObject(1, getSessionBean1().getPersonID());
dataTable1Model.execute();
} catch (Exception e) {
throw new FacesException(e);
5. Add a new JSP Fragment above the table and name it Test.jspf
6. Place an edit field (Search) and a button to submit the search
7. Add process value change event to the edit box:
getSessionBean1().setPersonID(new Integer((String)vce.getNewValue()));
8. Add action handler to the button but keep it empty for now since we do not have inter-page navigation here really
Now start project and enter 2 into search field click on the button and see the table did not update. Enter 3 and see that the table now shows the records for the person id 2.
So why do tutorial samples work and this JSPF does not? The problem is that JSPF fragment does not have any knowledge about the table data model on the Page1.jsp so it cannot synchronize it in the value change event!!! However, tutorial samples do update data model because value change event is in the same Java class. In this case JSPF is a completely different class.
Now please tell me what am I supposed to do? Don't suggest me to access Page1.tableDataModel from the Test.jspf since my JSPF can be included in different pages.
My current workaround again is using this call in the button action event:
try { getExternalContext().redirect("Page1.jsp"); } catch (Exception e) {};
Now, you have to pay me something for all that hard QA work I have to do for your entire QA department. ;-)
Here is the codes: (just in case)
Page1.java:
* Page1.java
* Created on December 19, 2004, 10:59 AM
* Copyright ybaykshtis
package test9;
import javax.faces.*;
import com.sun.jsfcl.app.*;
import javax.faces.component.html.*;
import com.sun.sql.rowset.*;
import com.sun.jsfcl.data.*;
import javax.faces.component.*;
public class Page1 extends AbstractPageBean {
// <editor-fold defaultstate="collapsed" desc="Creator-managed Component Definition">
private int __placeholder;
private HtmlForm form1 = new HtmlForm();
public HtmlForm getForm1() {
return form1;
public void setForm1(HtmlForm hf) {
this.form1 = hf;
private JdbcRowSetXImpl tripRowSet = new JdbcRowSetXImpl();
public JdbcRowSetXImpl getTripRowSet() {
return tripRowSet;
public void setTripRowSet(JdbcRowSetXImpl jrsxi) {
this.tripRowSet = jrsxi;
private HtmlDataTable dataTable1 = new HtmlDataTable();
public HtmlDataTable getDataTable1() {
return dataTable1;
public void setDataTable1(HtmlDataTable hdt) {
this.dataTable1 = hdt;
private UIColumn column1 = new UIColumn();
public UIColumn getColumn1() {
return column1;
public void setColumn1(UIColumn uic) {
this.column1 = uic;
private HtmlOutputText outputText1 = new HtmlOutputText();
public HtmlOutputText getOutputText1() {
return outputText1;
public void setOutputText1(HtmlOutputText hot) {
this.outputText1 = hot;
private HtmlOutputText outputText2 = new HtmlOutputText();
public HtmlOutputText getOutputText2() {
return outputText2;
public void setOutputText2(HtmlOutputText hot) {
this.outputText2 = hot;
private UIColumn column2 = new UIColumn();
public UIColumn getColumn2() {
return column2;
public void setColumn2(UIColumn uic) {
this.column2 = uic;
private HtmlOutputText outputText3 = new HtmlOutputText();
public HtmlOutputText getOutputText3() {
return outputText3;
public void setOutputText3(HtmlOutputText hot) {
this.outputText3 = hot;
private HtmlOutputText outputText4 = new HtmlOutputText();
public HtmlOutputText getOutputText4() {
return outputText4;
public void setOutputText4(HtmlOutputText hot) {
this.outputText4 = hot;
private UIColumn column3 = new UIColumn();
public UIColumn getColumn3() {
return column3;
public void setColumn3(UIColumn uic) {
this.column3 = uic;
private HtmlOutputText outputText5 = new HtmlOutputText();
public HtmlOutputText getOutputText5() {
return outputText5;
public void setOutputText5(HtmlOutputText hot) {
this.outputText5 = hot;
private HtmlOutputText outputText6 = new HtmlOutputText();
public HtmlOutputText getOutputText6() {
return outputText6;
public void setOutputText6(HtmlOutputText hot) {
this.outputText6 = hot;
private UIColumn column4 = new UIColumn();
public UIColumn getColumn4() {
return column4;
public void setColumn4(UIColumn uic) {
this.column4 = uic;
private HtmlOutputText outputText7 = new HtmlOutputText();
public HtmlOutputText getOutputText7() {
return outputText7;
public void setOutputText7(HtmlOutputText hot) {
this.outputText7 = hot;
private HtmlOutputText outputText8 = new HtmlOutputText();
public HtmlOutputText getOutputText8() {
return outputText8;
public void setOutputText8(HtmlOutputText hot) {
this.outputText8 = hot;
private UIColumn column5 = new UIColumn();
public UIColumn getColumn5() {
return column5;
public void setColumn5(UIColumn uic) {
this.column5 = uic;
private HtmlOutputText outputText9 = new HtmlOutputText();
public HtmlOutputText getOutputText9() {
return outputText9;
public void setOutputText9(HtmlOutputText hot) {
this.outputText9 = hot;
private HtmlOutputText outputText10 = new HtmlOutputText();
public HtmlOutputText getOutputText10() {
return outputText10;
public void setOutputText10(HtmlOutputText hot) {
this.outputText10 = hot;
private UIColumn column6 = new UIColumn();
public UIColumn getColumn6() {
return column6;
public void setColumn6(UIColumn uic) {
this.column6 = uic;
private HtmlOutputText outputText11 = new HtmlOutputText();
public HtmlOutputText getOutputText11() {
return outputText11;
public void setOutputText11(HtmlOutputText hot) {
this.outputText11 = hot;
private HtmlOutputText outputText12 = new HtmlOutputText();
public HtmlOutputText getOutputText12() {
return outputText12;
public void setOutputText12(HtmlOutputText hot) {
this.outputText12 = hot;
private RowSetDataModel dataTable1Model = new RowSetDataModel();
public RowSetDataModel getDataTable1Model() {
return dataTable1Model;
public void setDataTable1Model(RowSetDataModel rsdm) {
this.dataTable1Model = rsdm;
// </editor-fold>
public Page1() {
// <editor-fold defaultstate="collapsed" desc="Creator-managed Component Initialization">
try {
tripRowSet.setDataSourceName("java:comp/env/jdbc/Travel");
tripRowSet.setCommand("SELECT ALL TRAVEL.TRIP.TRIPID, TRAVEL.TRIP.PERSONID, TRAVEL.TRIP.DEPDATE, TRAVEL.TRIP.DEPCITY, TRAVEL.TRIP.DESTCITY, TRAVEL.TRIP.TRIPTYPEID FROM TRAVEL.TRIP WHERE TRAVEL.TRIP.PERSONID=?");
dataTable1Model.setDataCacheKey("com.sun.datacache.Page1.tripRowSet");
dataTable1Model.setRowSet(tripRowSet);
dataTable1Model.setSchemaName("TRAVEL");
dataTable1Model.setTableName("TRIP");
} catch (Exception e) {
log("Page1 Initialization Failure", e);
throw e instanceof FacesException ? (FacesException) e: new FacesException(e);
// </editor-fold>
// Additional user provided initialization code
try {
dataTable1Model.setObject(1, getSessionBean1().getPersonID());
dataTable1Model.execute();
} catch (Exception e) {
throw new FacesException(e);
protected test9.ApplicationBean1 getApplicationBean1() {
return (test9.ApplicationBean1)getBean("ApplicationBean1");
protected test9.SessionBean1 getSessionBean1() {
return (test9.SessionBean1)getBean("SessionBean1");
* Bean cleanup.
protected void afterRenderResponse() {
tripRowSet.close();
Page1.jsp
<?xml version="1.0" encoding="UTF-8"?>
<jsp:root version="1.2" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page">
<jsp:directive.page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"/>
<f:view><![CDATA[
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
]]><html
lang="en-US" xml:lang="en-US">
<head>
<meta content="no-cache" http-equiv="Cache-Control"/>
<meta content="no-cache" http-equiv="Pragma"/>
<title>Page1 Title</title>
<link href="resources/stylesheet.css" rel="stylesheet" type="text/css"/>
</head>
<body style="-rave-layout: grid">
<h:form binding="#{Page1.form1}" id="form1">
<h:dataTable binding="#{Page1.dataTable1}" headerClass="list-header" id="dataTable1" rowClasses="list-row-even,list-row-odd"
style="left: 24px; top: 168px; position: absolute" value="#{Page1.dataTable1Model}" var="currentRow">
<h:column binding="#{Page1.column1}" id="column1">
<h:outputText binding="#{Page1.outputText1}" id="outputText1" value="#{currentRow['TRIPID']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText2}" id="outputText2" value="TRIPID"/>
</f:facet>
</h:column>
<h:column binding="#{Page1.column2}" id="column2">
<h:outputText binding="#{Page1.outputText3}" id="outputText3" value="#{currentRow['PERSONID']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText4}" id="outputText4" value="PERSONID"/>
</f:facet>
</h:column>
<h:column binding="#{Page1.column3}" id="column3">
<h:outputText binding="#{Page1.outputText5}" id="outputText5" value="#{currentRow['DEPDATE']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText6}" id="outputText6" value="DEPDATE"/>
</f:facet>
</h:column>
<h:column binding="#{Page1.column4}" id="column4">
<h:outputText binding="#{Page1.outputText7}" id="outputText7" value="#{currentRow['DEPCITY']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText8}" id="outputText8" value="DEPCITY"/>
</f:facet>
</h:column>
<h:column binding="#{Page1.column5}" id="column5">
<h:outputText binding="#{Page1.outputText9}" id="outputText9" value="#{currentRow['DESTCITY']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText10}" id="outputText10" value="DESTCITY"/>
</f:facet>
</h:column>
<h:column binding="#{Page1.column6}" id="column6">
<h:outputText binding="#{Page1.outputText11}" id="outputText11" value="#{currentRow['TRIPTYPEID']}"/>
<f:facet name="header">
<h:outputText binding="#{Page1.outputText12}" id="outputText12" value="TRIPTYPEID"/>
</f:facet>
</h:column>
</h:dataTable>
<div style="left: 48px; top: 72px; position: absolute">
<jsp:directive.include file="Test.jspf"/>
</div>
</h:form>
</body>
</html>
</f:view>
</jsp:root>
Test.java
* Test.java
* Created on December 19, 2004, 11:01 AM
* Copyright ybaykshtis
package test9;
import javax.faces.*;
import com.sun.jsfcl.app.*;
import javax.faces.component.html.*;
import com.sun.jsfcl.data.*;
import javax.faces.component.*;
import com.sun.sql.rowset.*;
import javax.faces.convert.*;
import javax.faces.event.*;
public class Test extends AbstractPageBean {
// <editor-fold defaultstate="collapsed" desc="Creator-managed Component Definition">
private int __placeholder;
private JdbcRowSetXImpl personRowSet = new JdbcRowSetXImpl();
public JdbcRowSetXImpl getPersonRowSet() {
return personRowSet;
public void setPersonRowSet(JdbcRowSetXImpl jrsxi) {
this.personRowSet = jrsxi;
private HtmlInputText textField1 = new HtmlInputText();
public HtmlInputText getTextField1() {
return textField1;
public void setTextField1(HtmlInputText hit) {
this.textField1 = hit;
private HtmlCommandButton button1 = new HtmlCommandButton();
public HtmlCommandButton getButton1() {
return button1;
public void setButton1(HtmlCommandButton hcb) {
this.button1 = hcb;
// </editor-fold>
public Test() {
// <editor-fold defaultstate="collapsed" desc="Creator-managed Component Initialization">
try {
personRowSet.setDataSourceName("java:comp/env/jdbc/Travel");
personRowSet.setCommand("SELECT * FROM TRAVEL.PERSON");
} catch (Exception e) {
log("Test Initialization Failure", e);
throw e instanceof javax.faces.FacesException ? (FacesException) e: new FacesException(e);
// </editor-fold>
// Additional user provided initialization code
protected test9.ApplicationBean1 getApplicationBean1() {
return (test9.ApplicationBean1)getBean("ApplicationBean1");
protected test9.SessionBean1 getSessionBean1() {
return (test9.SessionBean1)getBean("SessionBean1");
* Bean cleanup.
protected void afterRenderResponse() {
personRowSet.close();
public String button1_action() {
// User event code here...
//try { getExternalContext().redirect("Page1.jsp"); } catch (Exception e) {};
return null;
public void textField1_processValueChange(ValueChangeEvent vce) {
// User event code here...
getSessionBean1().setPersonID(new Integer((String)vce.getNewValue()));
Test.jspf
<?xml version="1.0" encoding="UTF-8"?>
<div style="-rave-layout: grid" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html">
<p>Included Content Here</p>
<h:inputText binding="#{Test.textField1}" id="textField1" style="left: 48px; top: 48px; position: absolute" valueChangeListener="#{Test.textField1_processValueChange}"/>
<h:commandButton action="#{Test.button1_action}" binding="#{Test.button1}" id="button1" style="left: 240px; top: 48px; position: absolute" value="Submit"/>
</div>

Hi ,
Thanks for your valuable observations and feedback. I could observe that the workaround seems to be working fine. Thanks for providing the workaround.
The problem you are facing without the workaround is a known issue and our engineers are currently working on it.
Regards.
Creator Team.

How to skip validation for tag file, or jsp fragment?

hi
I have some jsp fragment and tag file in a workshop 10 project
workshop blame me about the jsp fragment (no start/end tag)
and unable to publish to server
is there a way to skip validation on some files?
I do found an check box call "validate JSP fragments" and I have un-ticked it. It does nothing.
please help

Yes, you can turn off validation either on project/folder/individual file.
Project:
Project > Properties - Validation AppXRay - un-check "Validate Workshop managed documents" (this is not recommended, you may loose entire AppXRay validation).Folder:
Project > Properties - Validation AppXRay - Exclude Folders tab, if all the JSP fragments are present in a particular folder (under WebAppRoot), you can pick that folder to be excluded from AppXRay validationFile:
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<%--<nitrox:set-property property="validation" value="true"/> --%>
Controls all validation in the IDE. The default value of true enables validation.

Confuse about the injecting entity in EJB 3.0?

Hi all,
I have an customersBean which is inherit from customersRemote and my problem is i' am little confuse about injecting the entity(customer).
Where can you apply the EntityManagerFactory is it outside on EJB or Inside the EJB? means outside EJB is use the web application or java application. i have and example.
this is inside on EJB...............
public class CustomersBean implements com.savingsaccount.session.CustomersRemote {
@PersistenceContext(unitName="SavingAccounts")
EntityManagerFactory emf;
EntityManager em;
/** Creates a new instance of CustomersBean */
public CustomersBean() {
public void create(int id, String name, String address, String telno, String mobileno)
try{
//This is the entity.
Customer _customer = new Customer();
_customer.setId(id);
_customer.setName(name.toString());
_customer.setAddress(address.toString());
_customer.setTelno(telno.toString());
_customer.setMobileno(mobileno.toString());
em = emf.createEntityManager();
em.persist(_customer);
emf.close();
}catch(Exception ex){
throw new EJBException(ex.toString());
in web application, i'm using the @EJB in customer servlets.
public class CustomerProcessServlet extends HttpServlet {
@EJB
private CustomersRemote customerBean;
blah blah inject directly coming request field from jsp.
}

Hi all,
I have an customersBean which is inherit from customersRemote and my problem is i' am little confuse about injecting the entity(customer).
Where can you apply the EntityManagerFactory is it outside on EJB or Inside the EJB? means outside EJB is use the web application or java application. i have and example.
this is inside on EJB...............
public class CustomersBean implements com.savingsaccount.session.CustomersRemote {
@PersistenceContext(unitName="SavingAccounts")
EntityManagerFactory emf;
EntityManager em;
/** Creates a new instance of CustomersBean */
public CustomersBean() {
public void create(int id, String name, String address, String telno, String mobileno)
try{
//This is the entity.
Customer _customer = new Customer();
_customer.setId(id);
_customer.setName(name.toString());
_customer.setAddress(address.toString());
_customer.setTelno(telno.toString());
_customer.setMobileno(mobileno.toString());
em = emf.createEntityManager();
em.persist(_customer);
emf.close();
}catch(Exception ex){
throw new EJBException(ex.toString());
in web application, i'm using the @EJB in customer servlets.
public class CustomerProcessServlet extends HttpServlet {
@EJB
private CustomersRemote customerBean;
blah blah inject directly coming request field from jsp.
}

Confused about transaction, checkpoint, normal recovery.

After reading the documentation pdf, I start getting confused about it's description.
Rephrased from the paragraph on the transaction pdf:
"When database records are created, modified, or deleted, the modifications are represented in the BTree's leaf nodes. Beyond leaf node changes, database record modifications can also cause changes to other BTree nodes and structures"
"if your writes are transaction-protected, then every time a transaction is committed the leaf nodes(and only leaf nodes) modified by that transaction are written to JE logfiles on disk."
"Normal recovery, then is the process of recreating the entire BTree from the information available in the leaf nodes."
According to the above description, I have following concerns:
1. if I open a new environment and db, insert/modify/delete several million records, and without reopen the environment, then normal recovery is not run. That means, so far, the BTree is not complete? Will that affact the query efficiency? Or even worse, will that output incorrect results?
2. if my above thinking is correct, then every time I finish commiting transactions, I need to let the checkpoint to run in order to recreate the whole BTree. If my above thinking is not correct, then, that means that, I don't need to care about anything, just call transaction.commit(), or db.sync(), and let je to care about all the details.(I hope this is true :>)
michael.

http://www.oracle.com/technology/documentation/berkeley-db/je/TransactionGettingStarted/chkpoint.html
Checkpoints are normally performed by the checkpointer background thread, which is always running. Like all background threads, it is managed using the je.properties file. Currently, the only checkpointer property that you may want to manage is je.checkpointer.bytesInterval. This property identifies how much JE's log files can grow before a checkpoint is run. Its value is specified in bytes. Decreasing this value causes the checkpointer thread to run checkpoints more frequently. This will improve the time that it takes to run recovery, but it also increases the system resources (notably, I/O) required by JE.
"""

Problem redering h:outputText tag on a jsp fragment

Hello to all... I'm trying to understand and use this new technology and I have encountered a problem that I cannot find any documentation as how to solve it. First I have my welcome.jsp page that I am using to call my fragment:
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <f:view>
            <h1><h:outputText value="Java Server Faces" /></h1>
            <f:subview id="banner">
                <c:import url="/banner.jsp"/>
            </f:subview>
        </f:view>
    </body>
</html>then I have my jsp fragment, banner.jsp:
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
    <f:loadBundle basename="com.gm.gsip.messages" var="msgs"/>
    <table border="1">
        <tr>
            <td> <h:outputText value="#{msgs.hour}"/> � </td>
            <td> <h:outputText value="#{msgs.hour1}"/> �</td>
            <td> <h:outputText value="#{msgs.hour2}"/>� </td>
            <td> <h:outputText value="#{msgs.hour3}"/> �</td>
            <td> <h:outputText value="#{msgs.hour4}"/>� </td>
            <td> <h:outputText value="#{msgs.hour5}"/> �</td>
            <td> <h:outputText value="#{msgs.hour6}" /> �</td>
            <td> <h:outputText value="#{msgs.hour7}" /> �</td>
            <td> <h:outputText value="#{msgs.total}" />� </td>
        </tr>
    </table>My problem is that the <h:outputText> tag is rendering the values outside the table. This is what gets displayed:
Java Server Faces
Hour1234567TOTAL
If I copy/paste the table tags (including the <h:outputText> tags) on the main jip, it renders without any problem:
Java Server Faces
Hour 1 2 3 4 5 6 7 TOTAL
I'm guessing that I might be missing some other jsf tag inside the jsp fragment. Any help will be greatly appreciated.
-thanks
Rolando

I can suggest you with the following solutions
1. try having <%out.flush();%> before and after c:import
2. try with jsp:include with flush=true
Can you reply back with which one works? I didnt try out both of them
Thanks

Confused about extending the Sprite class

Howdy --
I'm learning object oriented programming with ActionScript and am confused about the Sprite class and OO in general.
My understanding is that the Sprite class allows you to group a set of objects together so that you can manipulate all of the objects simultaneously.
I've been exploring the Open Flash Chart code and notice that the main class extends the Sprite class:
public class Base extends Sprite {
What does this enable you to do?
Also, on a related note, how do I draw, say, a line once I've extended it?
Without extending Sprite I could write:
var graphContainer:Sprite = new Sprite();
var newLine:Graphics = graphContainer.graphics;
And it would work fine. Once I extend the Sprite class, I'm lost. How do I modify that code so that it still draws a line? I tried:
var newLine:Graphics = this.graphics;
My understanding is that since I'm extending the Sprite class, I should still be able to call its graphics method (or property? I have no idea). But, it yells at me, saying "1046: Type was not found or was not a compile-time constant: Graphics.

Thanks -- that helped get rid of the error, I really appreciate it.
Alas, I am still confused about the extended Sprite class.
Here's my code so far. I want to draw an x-axis:
package charts {
    import flash.display.Sprite;
    import flash.display.Graphics;
    public class Chart extends Sprite {
        // Attributes
        public var chartName:String;
        // Constructor
        public function Chart(width:Number, height:Number) {
            this.width = width;
            this.height = height;
        // Methods
        public function render() {
            drawAxis();
        public function drawAxis() {
            var newLine:Graphics = this.graphics;
            newLine.lineStyle(1, 0x000000);
            newLine.moveTo(0, 100);
            newLine.lineTo(100, 100);
I instantiate Chart by saying var myChart:Chart = new Chart(); then I say myChart.render(); hoping that it will draw the axis, but nothing happens.
I know I need the addChild method somewhere in here but I can't figure out where or what the parameter is, which goes back to my confusion regarding the extended Sprite class.
I'll get this eventually =)

Confused about passing by reference and passing by valule

Hi,
I am confuse about passing by reference and passing by value. I though objects are always passed by reference. But I find out that its true for java.sql.PreparedStatement but not for java.lang.String. How come when both are objects?
Thanks

Hi,
I am confuse about passing by reference and passing
by value. I though objects are always passed by
reference. But I find out that its true for
java.sql.PreparedStatement but not for
java.lang.String. How come when both are objects?
ThanksPass by value implies that the actual parameter is copied and that copy is used as the formal parameter (that is, the method is operating on a copy of what was passed in)
Pass by reference means that the actual parameter is the formal parameter (that is, the method is operating on the thing which is passed in).
In Java, you never, ever deal with objects - only references to objects. And Java always, always makes a copy of the actual parameter and uses that as the formal parameter, so Java is always, always pass by value using the standard definition of the term. However, since manipulating an object's state via any reference that refers to that object produces the same effect, changes to the object's state via the copied reference are visible to the calling code, which is what leads some folk to think of java as passing objects by reference, even though a) java doesn't pass objects at all and b) java doesn't do pass by reference. It passes object references by value.
I've no idea what you're talking about wrt PreparedStatement, but String is immutable, so you can't change its state at all, so maybe that's what's tripping you up?
Good Luck
Lee
PS: I will venture a guess that this is the 3rd reply. Let's see...
Ok, second. Close enough.
Yeah, good on yer mlk, At least I beat Jos.
Message was edited by:
tsith

About jsp tags..............

Pls help
I am studing about JSP
if we write code in scriptlet tag i.e. < % %>
code goes into service() method of servlet ,which is automatically created by jsp Engine
if we write code in declaration tag i.e. <%! %>
code goes outside service() method of servlet ,which is automatically
created by jsp Engine means at class level.
is their any tag so that jsp code goes into init() method of servlet ,which is automatically created by jsp Engine for that jsp

simple and straight u need to code init() method using <%! %> tags.. but in case JSP it has to be jspInit() method.
The jspInit method is called by the container once and only once for a servlet instance. As you might guess from its name it is used to do initial once only setup such as getting resources and initialising variables that are used in the JSP page. The jspInit method can be overridden within a JSP page with code like the following.
<%!
public void jspInit(){
/*getServletConfig is inherited */
ServletConfig config= getServletConfig();
%>REF : http://www.examulator.com/moodle/mod/resource/view.php?id=380
REGARDS,
RaHuL

JSP plugin call for applet

How do I call an applet with the JSP plugin call? The applet works OK when called from an HTML file. However, when called from a JSP file, the applet is not found.
Here's the code:
<jsp:plugin type="applet" code="SelectList.class" codebase="applet"
archive="bc4jhtml.jar,datatags.jar,uixtags.jar,bc4juixtags.jar,ojsp.jar,ojsputil.jar,oc4j.jar,servlet.jar,ojc.jar,xmlparserv2.jar,regexp.jar,share.jar,uix2.jar,xmlcomp.jar,jdevrt.jar,runtime12.jar,bc4jmt.jar,collections.jar,bc4jct.jar,jndi.jar,classes12.jar,nls_charset12.jar,bc4jimdomains.jar,ordim.jar,ordhttp.jar,jdevcm.jar,bc4jdomorcl.jar,bc4jdatum.jar,activation.jar,jcert.jar,jnet.jar,jta.jar,mail.jar,ejb.jar,jaxp.jar,jdbc.jar,jaas.jar,jsse.jar,bc4jui.jar,bigraphbean.jar,LW_PfjBean.jar"
jreversion="1.2" width="1000" height="360" >
<jsp:params>
<jsp:param name="test" value="This is a test." />
</jsp:params>
<jsp:fallback>
You need to install the Java plugin on your web browser to run this applet.
</jsp:fallback>
</jsp:plugin>

You really don't need to put all the jar files in your archive list.
Most likely, you just need to put the jar that contains the applet.
And, few more dependencies jar files.
Here is some sample code for your reference:
<jsp:plugin type="applet" code="Clock2.class" codebase="applet" jreversion="1.2"
width="160" height="150" >
<jsp:fallback>
Plugin tag OBJECT or EMBED not supported by browser.
</jsp:fallback>
</jsp:plugin>
code attribute points to a class file "Clock2.class"
under the directory under codebase attribute "applet"
You may want to take a look into the HTML / JSP document about
how the plugin tag works in HTML / JSP.

I'm new and confused about "connection" things

I'm new to BlackBerry--I have an 8320 Curve, I'm a small business owner and I'm not connected to a BES. I use the BB Desktop Manager to synchronize with Outlook and to back up my BB and I've done pretty well on most things, but I still have a few things I'm confused about. In this forum, I'll ask my "confusion questions" concerning data options.
I have a "pay as you go" data plan with AT&T, my provider, because there is virtually no cell reception at my home where I also work. (I'm not using my BB for email since I'm in front of my computer most of the time). I have a home network set up and I've incorporated a router that supports wireless. I've connected a netbook to the wireless network and used it to surf the Internet, so, I know my wireless connection works. I've also managed to create a wireless connection on my BB to this network and on the Home screen, it will display my wireless network's name when I'm here at home, so, I know the device is connected to my network.
BUT, I don't think I'm actually using my home wireless network...I tried the other day by browsing the Internet and then AT&T told me I incurred data charges--which I thought I shouldn't have if I wasn't using their network. Either I'm wrong about assuming they won't charge me if I use my network or I have something set up incorrectly on my BB...can anyone provide some guidance?
Next, I don't truly understand what BIS is...I searched through the KB and couldn't find anything that actually defines BIS...could somebody please explain what BIS is?
Finally, can somebody please explain the difference between "mobile network" and "wi-fi"? It seems, if I turn off "mobile network" I have no connection at all, including wi-fi. Is that the way things should be? But, I can turn off wi-fi and still get a connection (if I go outside as far from my house as possible and face south <g>).
Thanks...and now I'm off to the BB Desktop Manager forum to ask a few questions there!
Solved!
Go to Solution.

Hi and Welcome to the forums!
I can help you with one or two of your questions:
ejm1 wrote:
Next, I don't truly understand what BIS is...I searched through the KB and couldn't find anything that actually defines BIS...could somebody please explain what BIS is?
BIS is Blackberry Internet Service...a service, hosted by your carrier, that provides a conduit between internet facing email systems (e.g., Yahoo, GMail, etc.) and your BB. Inside of BIS, you create conduits for each of your email providers that you desire to receive OTA email for on your BB. BIS will check your provider on a periodic basis (documented to be every 15 minutes) and only when there is something that needs to come to your BB does it generate any traffic over the carrier network with your BB. BIS is an add-service, only available to those who, from their carrier, contract for The Blackberry Data Plan (as it is usually called) -- a generic data plan is not usually adequate to have access to BIS.
ejm1 wrote:
Finally, can somebody please explain the difference between "mobile network" and "wi-fi"? It seems, if I turn off "mobile network" I have no connection at all, including wi-fi. Is that the way things should be? But, I can turn off wi-fi and still get a connection (if I go outside as far from my house as possible and face south <g>).
Mobile Network is your carriers network...data and/or voice services provided OTA for your BB. WiFi is wireless networking (802.11a/b/g/n) through your home WAP, hotspots, etc. I don't know if turning off Mobile Networ should or should not affect your ability to continue to use WiFi...I would think they are separate, but I don't have a BB model with WiFi.
I know nothing about the pay-as-you-go programs, but from all you describe, it seems that you may well be using your carrier network at times. You will need to find out (and there are others here who know) how to shut off your carrier network yet leave WiFi running so that you don't incurr the costs of surfing via the carrier network.
Hope that helps a little!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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Confused about mpls mtu command

hi,
i confuse about mpls mtu command
test platforms are 76 pfc3b,mpls,gigabit sip400 spa interface
if i didn't config mpls mtu command ,using default,ping command is successful,if more than 1496 packets, i can see fragment from show ip traffic.
if i config mpls mtu override 1504,ping command is sucessful too. there is fragment too when i use 1501 byte packet.
if i config mpls mtu override 1524 byte.
ping command failed if i use packet more than 1500, , all packet are droped,even 1501 byte.only 1500 byte packet can success.
all config above interface mtu is 1500.
this confused me.
why i use default 1500 interace mtu, mpls mtu override 1504 ,ping packet can fragment,ping success, but i use mpls mtu override 1524, i can see fragment in show ip traffic,but ping command failed. i can't see packet in destination router,how this work.
thank you!
jun

topology is simple
7609-1--sip GE spa----7609-2--pos---7609-3--flexwan E1-----7604-1--ge--ce
i config mpls mtu 1524 between 7609-1 and 7609-2 . and keep interface mtu 1500 default.
ping packet from 7609-1 to 7604-1 loopback 0.
ping 1500 byte packet is ok, but ping 1501 byte packet is totally lost.then i config mtu 1524 between 7604-1 and 7609-3, it is useless,notwork, i can't see packet coming from 7609-1 on 7604-1.
but i add config mtu 1524 between 7609-1 and 7609-2. config mtu 1500 between 7604-1 and 7609-3,ping 1501 bytes from 7609-1 to 7604-1 loopback0 is ok. but i can see fragment from show ip traffic command in 7609-3.
i have a question, why we need mpls mtu command. if we don't change interface mtu,just only config mpls mtu 1524, it doesn't work, if we just change mpls mtu,how it work in the ios. if we config interface mtu 1524,interface mtu size is big enough, it seems mpls mtu command is useless, we don't need mpls mtu command, just interface mtu 1524 is ok.
why we need mpls mtu command. we just only change interface mtu is enough.
thank you!
jun

[SOLVED] Confused about Mobility Radeon HD 3200

I've always found hard to find good information about this card - some sources, even, contradict themselves. All what I know is that it is an integrated graphics card and that it features the RS780M chipset. These are some tips I've got from the system logs:
grep -i r600 /var/log/Xorg.0.log
[ 23.353] (II) RADEON(0): [DRI2] DRI driver: r600
[ 23.353] (II) RADEON(0): [DRI2] VDPAU driver: r600
[ 24.099] (II) AIGLX: Loaded and initialized r600
dmesg | grep -i radeon
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-linux-hf root=UUID=ab92c2db-22b5-4fcb-a33f-2efe3f3f104c ro radeon.modeset=1 radeon.benchmark=0 radeon.tv=0 radeon.pm=0 init=/usr/lib/systemd/systemd quiet
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-linux-hf root=UUID=ab92c2db-22b5-4fcb-a33f-2efe3f3f104c ro radeon.modeset=1 radeon.benchmark=0 radeon.tv=0 radeon.pm=0 init=/usr/lib/systemd/systemd quiet
[ 1.463857] [drm] radeon kernel modesetting enabled.
[ 1.464337] radeon 0000:01:05.0: VRAM: 256M 0x00000000C0000000 - 0x00000000CFFFFFFF (256M used)
[ 1.464340] radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF
[ 1.464779] [drm] radeon: 256M of VRAM memory ready
[ 1.464781] [drm] radeon: 512M of GTT memory ready.
[ 1.472494] radeon 0000:01:05.0: WB enabled
[ 1.472499] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000a0000c00 and cpu addr 0xffff8800374a5c00
[ 1.472502] radeon 0000:01:05.0: fence driver on ring 3 use gpu addr 0x00000000a0000c0c and cpu addr 0xffff8800374a5c0c
[ 1.472570] [drm] radeon: irq initialized.
[ 1.472672] radeon 0000:01:05.0: setting latency timer to 64
[ 1.504277] [drm] radeon atom DIG backlight initialized
[ 1.504279] [drm] Radeon Display Connectors
[ 1.504311] [drm] radeon: power management initialized
[ 2.344989] fbcon: radeondrmfb (fb0) is primary device
[ 2.441483] radeon 0000:01:05.0: fb0: radeondrmfb frame buffer device
[ 2.441486] radeon 0000:01:05.0: registered panic notifier
[ 2.441502] [drm] Initialized radeon 2.30.0 20080528 for 0000:01:05.0 on minor 0
I also found good (?) information, or at least a clearly-explained article, here. After reading it, UVD appears as the AMD's counterpart of NVIDIA's VDPAU for video acceleration.
What I'm not sure about, is:
- Does it support video acceleration? I'd like to offload video processing to the GPU, but am not sure if my card and the open-source drivers support it or not. Wikipedia's article about VDPAU states it comes from NVIDIA, but then it says it has an open-source implementation.
- What has gallium to do with it? What gallium drivers should I enable in mesa? And what about DRI drivers?
I configured mesa as follows:
./configure --prefix=/usr \
--sysconfdir=/etc \
--with-dri-driverdir=/usr/lib/xorg/modules/dri \
--with-gallium-drivers=r600 \
--with-dri-drivers=radeon \
--with-llvm-shared-libs \
--enable-gallium-llvm \
--enable-egl \
--enable-gallium-egl \
--with-egl-platforms=x11,drm \
--enable-shared-glapi \
--enable-gbm \
--enable-glx-tls \
--enable-dri \
--enable-glx \
--enable-osmesa \
--enable-texture-float \
--enable-xa \
--enable-vdpau
Not sure if I missed something, though.
I am very confused about how Linux manages graphics, and what all those layers are for. DRM, DRI, VDPAU, VA-API, gl, gl3, xv, xvmc... it's a mess!
Thanks in advance.
Last edited by Kalrish (2013-06-16 17:54:04)

The feature matrix might help. The easy part to answer is that the 3D driver is split into two parts: DRM which is part of the kernel and DRI which is in userspace and comes from the mesa package.
Xv is an Xserver extension supported by pretty much all drivers. Found in the DDX (xf86-video-*), it uses features of the card to speed up the display of video (but not decoding). It can either do this by using the "video overlay" or creating a shader.
Now if you want to use Xv but also offload decoding to the card, you need a video acceleration API. The ones to choose from are XvMC, VA-API, VDAPU in increasing order of feature support. They were developed by Xorg, Intel, Nvidia respectively but anyone is free to implement them. I don't think it's correct to call UVD a counterpart of VDPAU. UVD is a bunch of registers on newer AMD cards. And if you sent bits to those registers in the right way, you can implement VDPAU.
The other way to implement VDPAU (say if the documentation for UVD registers was not released) is to use gallium. There is a gallium state tracker which can still do it at the expense of being slower. It is a hack whereby you convert video frames to polygon textures and make the OpenGL part of the card think that it's calculating part of a 3D scene when really it's decoding video.

JSP Fragments

I am trying to use the JSP Fragments feature of JSP 2.0 specification which is supported by WLP 9.2
<jsp:attribute name="stringFrag">
This is the output of chaining 2 defined strings: ${result}
</jsp:attribute>
Workshop is complaining about the unknown tag for jsp

Yes, that's true. It looks like the bug is there in the eclipse.
https://www.eclipse.org/bugs/show_bug.cgi?format=multiple&id=105460
I appreciate if you guys find any work around for this problem in weblogic portal 9.2.
Good luck !
Sriman

Confused about jsp fragment call

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