Why do we need 2 JNDI while congifuring DB or OA Adapters
Hi,
i have a question why do we need to have 2 JNDI's while configuring DB or OA adapters. I mean first we create a JDBC connection and specify a JNDI , and again in Deployments -> DBadapter/OAadapter-> we go and configure a JNDI with JDBC name .
Why is it so ?
- Thanks
Shirish
the first one you mentioned is used when creating the jdbc datasource, the jndi is at that moment the identifier which you can use for a lookup of the datasource.
this jndi identifier you then use in the database adapter so it can lookup the datasource information based on the jndi value
so the first one physically creates it and in all the other steps you 'use' the jndi lookup for retrieving it's information
see : http://en.wikipedia.org/wiki/Java_Naming_and_Directory_Interface
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Why do I need to catch this exception?
Hello all
This is a question about exception handling. I have to build a diary application that lets you save reminders on particular dates using xml. Just to make it a little tougher, I was not allowed to use the Calendar class. This is the code I wrote:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import org.w3c.dom.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import static java.lang.Math.*;
public class CalendarAssignment extends JFrame implements ActionListener
int MonthLength [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
public JButton [] days = new JButton[43];
private JLabel lbl, reminderlbl;
private JPanel top, grid, remindercenter, reminderbottom;
private JFrame reminderframe;
private JTextField year1, reminderinput, dayno;
private JComboBox months;
private Container container;
private JButton fetch, save, cancel;
private Document doc;
private File file;
private Node node;
private String year, month, day;
public static void main( String[] args ) {
CalendarAssignment c = new CalendarAssignment( );
c.setSize( 400, 300 );
c.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
c.show( );
public CalendarAssignment( ) {
int CurrentYear, CurrentMonth;
String YearString, MonthString, Now;
Date today;
container = getContentPane( );
container.setLayout( new BorderLayout( ) );
SimpleDateFormat DateFormatter;
DateFormatter = new SimpleDateFormat( "MM.yyyy" );
today = new Date( );
Now = DateFormatter.format( today );
MonthString = Now.substring( 0,2 );
YearString = Now.substring( 3,7 );
CurrentMonth = Integer.valueOf( MonthString );
CurrentYear = Integer.valueOf( YearString );
top = new JPanel( );
String [] items = { "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November",
"December" };
months = new JComboBox( items );
months.setEditable( false );
months.setSelectedIndex( CurrentMonth - 1 );
year1 = new JTextField( );
year1.setText( YearString );
year1.setEditable( true );
year1.setHorizontalAlignment( year1.CENTER );
fetch = new JButton( "Fetch Month" );
fetch.addActionListener( this );
top.setLayout( new GridLayout( 1, 3, 20, 0 ) );
top.add( months );
top.add( year1 );
top.add( fetch );
grid = new JPanel( );
grid.setLayout( new GridLayout( 7, 7, 0, 0 ) );
String [] week = { "Mon", "Tue", "Wed", "Thur", "Fri", "Sat", "Sun" };
for ( int a = 0; a < 7; a ++ ) {
JLabel lbl = new JLabel( week[a], JLabel.CENTER );
grid.add( lbl );
for ( int i = 0; i < 42; i ++ ) {
days[i] = new JButton( );
grid.add( days[i] );
days.addActionListener( this );
DrawCalendar( CurrentMonth, CurrentYear );
container.add( top, BorderLayout.NORTH );
container.add( grid, BorderLayout.CENTER );
private void DrawCalendar( int SelectMonth, int SelectYear ) {
int DisplayMonthLength, Buttons;
String ButtonID = "";
int OffSet = MonthStart( SelectMonth, SelectYear );
DisplayMonthLength = MonthLength [SelectMonth - 1];
if ( SelectMonth == 2 )
DisplayMonthLength += LeapYear( SelectYear );
for ( Buttons = 1; Buttons < 43; Buttons ++ ) {
if ( ( Buttons <= OffSet ) || ( Buttons > ( DisplayMonthLength + OffSet ) ) ) {
ButtonID = "";
days[Buttons-1].setEnabled( false );
else {
ButtonID = Integer.toString( Buttons - OffSet );
days[Buttons-1].setEnabled( true );
days[Buttons-1].setLabel( ButtonID );
grid.add( days[Buttons-1] );
private int LeapYear( int year ) {
int FourHundred, OneHundred, Fourth;
FourHundred = year % 400;
OneHundred = year % 100;
Fourth = year % 4;
if( ( ( FourHundred == 0 ) ) || ( ( OneHundred != 0 ) && ( Fourth == 0 ) ) )
return ( 1 );
else
return ( 0 );
private int MonthStart( int Month, int Year ) {
int OffSet, LastMonths, BeforeOrAfter, Years;
int AllDays = 0;
int YearDays = 365;
int YearMonths = 12;
BeforeOrAfter = Year - 2006;
Years = abs( BeforeOrAfter );
if( BeforeOrAfter != 0 )
BeforeOrAfter = BeforeOrAfter / Years;
switch( BeforeOrAfter ) {
case 1:
for( int a = 2006; a < Year; a ++ ) {
AllDays += YearDays + LeapYear( a );
AllDays += LastMonthsCalc( Month, Year );
break;
case -1:
for( int a = 2005; a > Year; a -- ) {
AllDays += YearDays + LeapYear( a );
for( LastMonths = YearMonths; LastMonths >= Month; LastMonths -- ) {
AllDays += MonthLength[LastMonths - 1];
if( LastMonths == 2 )
AllDays += LeapYear( Year );
break;
default:
if( Month > 1 )
AllDays += ( LastMonthsCalc( Month, Year ) );
OffSet = AllDays % 7;
if( BeforeOrAfter ==( -1 ) )
return( 6 - OffSet );
else if( OffSet > 0 )
return( OffSet - 1 );
else
return( 6 );
private int LastMonthsCalc( int Month, int Year ) {
int Counter;
int days = 0;
for( Counter = 1; Counter < Month; Counter ++ ) {
days += MonthLength[Counter - 1];
if( Counter == 2 )
days += LeapYear( Year );
return( days );
public void CreateReminder( String buttonID, String yearID, String monthID ) {
reminderframe = new JFrame( );
reminderlbl = new JLabel( );
reminderframe.setLayout( new GridLayout( 2, 1, 0, 0 ) );
remindercenter = new JPanel( );
reminderlbl = new JLabel( "Please type in reminder to be saved for " + buttonID + " " + monthID + " " + yearID + ":", JLabel.CENTER );
reminderinput = new JTextField( 30 );
reminderinput.setHorizontalAlignment( reminderinput.CENTER );
reminderinput.setEditable( true );
remindercenter.setLayout( new GridLayout( 2, 1, 0, 0 ) );
remindercenter.add( reminderlbl );
remindercenter.add( reminderinput );
reminderbottom = new JPanel( );
save = new JButton( "Save" );
save.addActionListener( this );
cancel = new JButton( "Cancel" );
cancel.addActionListener( this );
dayno = new JTextField( buttonID );
dayno.setEditable( false );
dayno.setEnabled( false );
dayno.show( false );
reminderbottom.setLayout( new FlowLayout( ) );
reminderbottom.add( save );
reminderbottom.add( cancel );
reminderbottom.add( dayno );
reminderframe.setSize( 500, 75 );
reminderframe.add( remindercenter );
reminderframe.add( reminderbottom );
reminderframe.pack( );
reminderframe.show( );
public void SaveReminder( String dayID, String yearID, String monthID ) throws Exception {
file = new File( "Diary.xml" );
doc = DocumentBuilderFactory.newInstance( ).newDocumentBuilder( ).parse( file.toURL( ).toString( ) );
String year = yearID;
String month = monthID;
String day = dayID;
//System.out.println( year );
//System.out.println( month );
//System.out.println( day );
CreateEntry( doc.getDocumentElement( ) );
writeXmlFile( );
public boolean CreateEntry( Node node ) {
Node searchNode;
searchNode = getYear( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Year" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", year );
node = searchNode;
searchNode = getMonth( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Month" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", month );
node = searchNode;
searchNode = getDay( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Day" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", day );
node = searchNode;
String entry = reminderinput.getText( );
Node textNode = doc.createTextNode( entry );
node.appendChild( textNode );
return true;
private Node getYear( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if(node.getNodeName( ).equals( "Year" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == year )
return node;
node = node.getNextSibling( );
return null;
private Node getMonth( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if( node.getNodeName( ).equals( "Month" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == month )
return node;
node = node.getNextSibling( );
return null;
private Node getDay( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if( node.getNodeName( ).equals( "Day" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == day )
return node;
node = node.getNextSibling( );
return null;
private void writeXmlFile( ) throws Exception {
Source source = new DOMSource( doc );
Result result = new StreamResult( file );
Transformer xformer = TransformerFactory.newInstance( ).newTransformer( );
xformer.setOutputProperty( OutputKeys.INDENT,"yes" );
xformer.setOutputProperty( OutputKeys.DOCTYPE_SYSTEM,"Diary.dtd" );
xformer.transform( source, result );
public void actionPerformed( ActionEvent e ) {
String IDButton = e.getActionCommand( );
String IDYear = year1.getText( );
Object IDMonthObj = months.getSelectedItem( );
if( e.getSource( ) == fetch ) {
String YearText = year1.getText( );
int YearNumber = Integer.valueOf( YearText );
int MonthsIndex = months.getSelectedIndex( ) + 1;
DrawCalendar( MonthsIndex, YearNumber );
else if( e.getSource( ) == cancel ) {
reminderframe.hide( );
else if( e.getSource( ) == save ) {
String IDDay = dayno.getText( );
String IDMonth = String.valueOf( IDMonthObj );
SaveReminder( IDDay, IDYear, IDMonth );
else {
String IDMonth = String.valueOf( IDMonthObj );
Toolkit.getDefaultToolkit( ).beep( );
int n = JOptionPane.showConfirmDialog( null, "Set reminder on this date?", "Question", JOptionPane.YES_NO_OPTION );
if( n == JOptionPane.YES_OPTION ) {
CreateReminder( IDButton, IDYear, IDMonth );
If you compile it, you will realise that I get an error about exception handling. My lecturer gave me an example code of how to do the same thing without using a GUI:
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
public class CallDOM
Document doc;
File file;
Scanner input;
int year, month, day;
String currentYear, currentMonth;
public static void main(String args[]) throws Exception
CallDOM cd=new CallDOM();
CallDOM() throws Exception
file=new File("Diary.xml");
//create DOM from file
doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(file.toURL().toString());
input=new Scanner(System.in);
System.out.println("1) Create entry");
System.out.println("2) Read entry");
System.out.println("3) Show Diary");
System.out.println("4) Quit");
int choice=input.nextInt();
while(choice!=4)
switch(choice)
case 1: GetDate();CreateEntry(doc.getDocumentElement());break;
case 2: GetDate();ReadEntry(doc.getDocumentElement());break;
case 3: ShowDiary(doc.getDocumentElement());
System.out.println("1) Create entry");
System.out.println("2) Read entry");
System.out.println("3) Show Diary");
System.out.println("4) Quit");
choice=input.nextInt();
writeXmlFile();
public void GetDate()
System.out.println("Enter date (dd mm yyyy)");
day=input.nextInt();
month=input.nextInt();
year=input.nextInt();
public boolean ReadEntry(Node node)
node = getYear(node);
if(node==null) return false;
node = getMonth(node);
if(node==null) return false;
node = getDay(node);
if(node==null) return false;
node = node.getFirstChild();
while(node!=null)
System.out.println(node.getNodeValue().trim());
node=node.getNextSibling();
return true;
public boolean CreateEntry(Node node)
Node searchNode;
searchNode = getYear(node);
if(searchNode==null)
Element newNode = doc.createElement("Year");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(year));
node = searchNode;
searchNode = getMonth(node);
if(searchNode==null)
Element newNode = doc.createElement("Month");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(month));
node = searchNode;
searchNode = getDay(node);
if(searchNode==null)
Element newNode = doc.createElement("Day");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(day));
node = searchNode;
System.out.println("Enter Text");
String entry=input.next();
entry+=input.nextLine();
Node textNode = doc.createTextNode(entry);
node.appendChild(textNode);
return true;
public void ShowDiary(Node node)
Stack<Node> stack=new Stack<Node>();
Node child;
stack.push(node);
while(!stack.empty())
node = stack.pop();
if(ProcessNode(node))
child = node.getLastChild();
while(child!=null)
stack.push(child);
child = child.getPreviousSibling();
private boolean ProcessNode(Node node)
if(node.getNodeName().equals("Year"))
currentYear=node.getAttributes().item(0).getNodeValue();
if(node.getNodeName().equals("Month"))
currentMonth=node.getAttributes().item(0).getNodeValue();
if(node.getNodeName().equals("Day"))
System.out.print(node.getAttributes().item(0).getNodeValue()+"/"+
currentMonth+"/"+currentYear+": ");
node=node.getFirstChild();
while(node!=null)
System.out.println(node.getNodeValue().trim());
node=node.getNextSibling();
return false;
return true;
private Node getYear(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Year")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==year)
return node;
node = node.getNextSibling();
return null;
private Node getMonth(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Month")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==month)
return node;
node = node.getNextSibling();
return null;
private Node getDay(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Day")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==day)
return node;
node = node.getNextSibling();
return null;
private void writeXmlFile() throws Exception
Source source = new DOMSource(doc);
Result result = new StreamResult(file);
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.setOutputProperty(OutputKeys.INDENT,"yes");
xformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,"Diary.dtd");
xformer.transform(source, result);
}My question is, why does the exceptions in the example code not need to be caught? And why do I have to catch the exceptions in my code? Several exceptions are thrown in the example code, but there is no catch statement.
Thanks for any advice!!Since your question didn't come with any relevant details, and since you have huge steaming piles of irrelevant code, all I can give is a general answer to "Why do I need to catch this exception?"
[url http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html]Exception tutorial at http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html
Here's a quick overview of exceptions:
The base class for all exceptions is Throwable. Java provides Exception and Error that extend Throwable. RuntimeException (and many others) extend Exception.
RuntimeException and its descendants, and Error and its descendants, are called unchecked exceptions. Everything else is a checked exception.
If your method, or any method it calls, can throw a checked exception, then your method must either catch that exception, or declare that your method throws that exception. This way, when I call your method, I know at compile time what can possibly go wrong and I can decide whether to handle it or just bubble it up to my caller. Catching a given exception also catches all that exception's descendants. Declaring that you throw a given exception means that you might throw that exception or any of its descendants.
Unchecked exceptions (RuntimeException, Error, and their descendants) are not subject to those restrictions. Any method can throw any unchecked exception at any time without declaring it. This is because unchecked exceptions are either the sign of a coding error (RuntimeException), which is totally preventable and should be fixed rather than handled by the code that encounters it, or a problem in the VM, which in general can not be predicted or handled. -
What am I doing wrong with the isNew() method? and why do I need the other methods?
I have coded an include jsp like this.
<%@page language="Java"%>
<%@page import="javax.servlet.http.HttpSession"%>
<%!
String iContextPath;
String iCommonPath;
String iImagesPath;
%>
<%
iContextPath = request.getContextPath();
iCommonPath = iContextPath + "/common";
iImagesPath = iCommonPath + "/images";
System.err.println(" here ");
HttpSession thisSession = request.getSession( false );
if( thisSession.isNew() ){
System.err.println("isnew");
response.sendRedirect( iContextPath + "/common/login.jsp" );
%>
Now I also have a redirect.jsp in the root of an application that contains
this.
<html>
<body>
<%
System.err.println("Redirecting at this time from the root");
response.sendRedirect( request.getContextPath() + "/secureArea/");
%>
</body>
</html>
And I have a logout.java servlet that looks like this.
package com.pch.epics;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import weblogic.servlet.security.ServletAuthentication;
public class Logout extends HttpServlet{
private static final String CONTENT_TYPE = "text/html";
//Initialize global variables
public void init() throws ServletException{
//Process the HTTP Get request
public void doGet( HttpServletRequest request, HttpServletResponse
response ) throws ServletException, IOException{
String username = "";
if( request.getUserPrincipal() == null ){
username = "Unknown";
} else {
username = request.getUserPrincipal().getName();
System.err.println( "ePics logging out '" + username + "'" );
request.getSession( false ).invalidate();
ServletAuthentication.logout( request );
ServletAuthentication.invalidateAll( request );
ServletAuthentication.killCookie( request );
response.sendRedirect( request.getContextPath() );
//Process the HTTP Post request
public void doPost( HttpServletRequest request, HttpServletResponse
response ) throws ServletException, IOException{
doGet( request, response );
//Clean up resources
public void destroy(){
First of all, why won't the isNew() report a new session in the server log?
EVERY request coming in says it's an old request (ie it's not new). The
J2EE Applications and BEA WebLogic Server book from BEA says this should
work.
My second question is why do I need to do those three lines from
ServletAuthentication to logout a user? Ok, maybe I'm from the MS world,
but that seems excessive, especially since I've already done a
session.invalidate() right before it, but the bea docs say I'm required to
do all four!
When you invalidate a session. You invalidate the session of the web
application that your jsp/servlet is part of. It is possible to have more
than one web application on WLS and have them share a authentication info.
While these applications share authentication they do not share their
sessions so because of that calling session invalidate does not kill all the
sessions. ServletAuthentication is needed to kill all the sessions and do a
complete logout from WLS.
"Flip" <[remove][email protected]> wrote in message
news:[email protected]...
> I have coded an include jsp like this.
>
> <%@page language="Java"%>
> <%@page import="javax.servlet.http.HttpSession"%>
> <%!
> String iContextPath;
> String iCommonPath;
> String iImagesPath;
> %>
> <%
> iContextPath = request.getContextPath();
> iCommonPath = iContextPath + "/common";
> iImagesPath = iCommonPath + "/images";
>
> System.err.println(" here ");
> HttpSession thisSession = request.getSession( false );
> if( thisSession.isNew() ){
> System.err.println("isnew");
> response.sendRedirect( iContextPath + "/common/login.jsp" );
> }
>
> %>
>
> Now I also have a redirect.jsp in the root of an application that contains
> this.
> <html>
> <body>
> <%
> System.err.println("Redirecting at this time from the root");
> response.sendRedirect( request.getContextPath() + "/secureArea/");
> %>
> </body>
> </html>
>
> And I have a logout.java servlet that looks like this.
> package com.pch.epics;
>
> import java.io.IOException;
> import javax.servlet.ServletException;
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
> import weblogic.servlet.security.ServletAuthentication;
>
> public class Logout extends HttpServlet{
> private static final String CONTENT_TYPE = "text/html";
> //Initialize global variables
> public void init() throws ServletException{
> }
>
> //Process the HTTP Get request
> public void doGet( HttpServletRequest request, HttpServletResponse
> response ) throws ServletException, IOException{
> String username = "";
> if( request.getUserPrincipal() == null ){
> username = "Unknown";
> } else {
> username = request.getUserPrincipal().getName();
> }
> System.err.println( "ePics logging out '" + username + "'" );
> request.getSession( false ).invalidate();
> ServletAuthentication.logout( request );
> ServletAuthentication.invalidateAll( request );
> ServletAuthentication.killCookie( request );
> response.sendRedirect( request.getContextPath() );
> }
>
> //Process the HTTP Post request
> public void doPost( HttpServletRequest request, HttpServletResponse
> response ) throws ServletException, IOException{
> doGet( request, response );
> }
>
> //Clean up resources
> public void destroy(){
> }
> }
>
> First of all, why won't the isNew() report a new session in the server
log?
> EVERY request coming in says it's an old request (ie it's not new). The
> J2EE Applications and BEA WebLogic Server book from BEA says this should
> work.
>
> My second question is why do I need to do those three lines from
> ServletAuthentication to logout a user? Ok, maybe I'm from the MS world,
> but that seems excessive, especially since I've already done a
> session.invalidate() right before it, but the bea docs say I'm required to
> do all four!
>
>
>
-
Why do i need to enter the credit card information for downloading free apps and redeem the codes?
getting a message says apple id has not yet been used with the itunes store while trying to download apps
why do i need to enter the credit card information for downloading free apps and redeem the codes?As a security precaution, Apple verifies your billing credentials with every transaction whether paid or free apps or using the balance of a redeemed code.
-
Why do I need Library at root level AND a library in the admin user folder?
I have three user accounts in my macbook, I share it with two brothers. I'm the "administrator". Under my user account there is a library folder, same as with the other two users. But I also have a library folder at the root level when I open the "Macintosh HD" icon on the desktop. I notice that both the library at my user folder and the one in the root folder have items that have been updated recently.
While I noticed that the individual user libraries are "normal" in size, the one at the root level is 11 GB.
Why do I need the library at the root level? Can I consolidate that with the Library in my user folder?
Thanks!Why do I need the library at the root level?
For items which apply to all user accounts.
Can I consolidate that with the Library in my user folder?
No.
(57249) -
Why do I need to Clone a drive partition...
...if I'm installing a new OS to another one??
I've got Panther--my current, albeit outdated, boot OS--installed on one partition of my Dual G4 (and yes, the limitations of this computer is one reason I'm not on Leopard yet)--and trying to install Tiger onto the 2nd partition (which will hopefully tide me over until I upgrade to a new iMac or Powerbook w/ Leopard). I don't have much experience upgrading to a new OS while one is working, so hopefully the older/current one will act as a backup safeguard if the newer one acts up.
Anyway, I haven't been able to install it yet--for whatever reason, it's not progressing beyond "Verifying Destination Volume," and I can't seem to verify the partition in Disk Utility due to Authentication issues, but that's ANOTHER issue--but unless that directly relates, I can't figure out WHY everyone keeps telling me that I should clone either drive (using Carbon Copy).
I already have all the important PERSONAL files from the current boot partition--and everything on the 2nd partition I'm trying to install to--backed up onto an external.
So why do I need to clone either drive?? Just trying to clarify here...phasmatrope:
I installed the new OS, Tiger, last night (which was actually fairly easy too... although it DIDN'T ask me if I wanted to do a Clean Upgrade, or an Archive & Install, which I'd heard were both options, which DOES worry me somewhat... but I suppose that's another post). It seems to be working fine thus far.
It is hard to tell exactly what installation option was used in your installation, but it you are satisfied that your installation is working as it should, I don't think you need to be concerned about it.
I figure in a few weeks, I may try deleting the clone from my partition (how long I should wait though, and whether or not I'll need to erase the drive entirely
So long as your installation is working well, and all your data that you backed up has been restored, and you are sure you will not be losing anything of value, you may delete the clone/backup...but wait until I respond to another of your questions.
what I'm wondering is: can I copy other material to that drive in the meantime without any problem?? After all, it IS a 300GB drive, and since I'd only cloned the 37 or so GB of my old boot partition there, I should be able to fit the 45 GB that are on the second partition onto there.
I suggest that you partition your 300 GB external HDD so that it can accomodate all your needs.
• Partition your HDD so that one partition is approximately the size of your internal HDD. Then you can clone your new installation to that partition, and make regular backups to that partition.
• You can create a second partition to accomodate the material of the second partition of the drive you clone. Give yourself sufficient room for expansion.
• Create other partitions one possibly just for scratch, saving odds and ends or whatever.
Here is a step-by-step procedure for partitioning:
Formatting, Partitioning Erasing a Hard Disk Drive
Warning! This procedure will destroy all data on your Hard Disk Drive. Be sure you have an up-to-date, tested backup of at least your Users folder and any third party applications you do not want to re-install before attempting this procedure.
Formatting an External HDD
Connect external HDD to computer
Turn on external HDD
Start up computer and log in
Go to Applications > Utilities > Disk Utility and launch DU.
Select your HDD (manufacturer ID) of drive to be partitioned in left side bar.
Select number of partition in pull-down menu above Volume diagram.
(Note 1: One partition is normally preferable for an internal HDD. External HDDs usually have more than one. See Dr. Smoke’s FAQ Backup and Recovery for tips on partitioning external HDD
Note 2: For more partitions than one, after you have selected the number of partitions you can adjust the size of the partition by selecting the top partition and typing in the size; then move down if more adjustments need to be made..)
Type in name in Name field (usually Macintosh HD)
Select Volume Format as Mac OS Extended (Journaled)
Click Partition button at bottom of panel.
Select Erase tab
Select the sub-volume (indented) under Manufacturer ID (usually Macintosh HD).
Check to be sure your Volume Name and Volume Format are correct.
Optional: Select on Security Options button (Tiger) Options button (Panther & earlier).
Select Zero all data. (This process will map out bad blocks on your HDD. However, it could take several hours. If you want a quicker method, don't go to Security Options and just click the Erase button.)
Click OK.
Click Erase button
Quit Disk Utility.
Please do post back with further questions or comments.
Cheers
cornelius -
Why we dont need sender agreement and comm channel in IDOC to file scenario
Hi,
there are 2 queries:
first query :
Scenario is "Idoc to file transfer"
why we dont need sender agreement and communication channel for IDOC to file ,while we do need
both of these for "File to RFC "
Answer : which i got is because IDOC sits at ABAP stack but same is valid for RFC also.
Then why For "IDOC to file" we dont need that.
Second query:
Also when i did scenario for File1-RFC-File2 scenario using BPM i have created a interface
between XI-RFC synchronous to send data which we got from file1 in XI to RFC importing parameter
and getting data from RFC back to File2.
Here in IDOC to file scenario why we dont need any interfface for IDOC-XI Asynchronous.
Regards,
Mayank
Edited by: mayank verdia on Jan 13, 2009 11:49 AM
Edited by: mayank verdia on Jan 13, 2009 11:50 AMDear All,
For file to idoc scenario is there any possibility to get line items details or xml details i.e the segments and its related field details using reference id, transaction id or interface name or message id in SAP PI 7.0. I know we need to click each and every message in sxi_monitor and look for details.
For SAP(R3 System) I can create a report and set the job for specific time period so automatically it throws the details(like reference no, document date, invoice no from) in ftp path as .csv file. The same ftp path is maintained in program.
I wanted to check FTP--->PI postings and I have set the job at r3 system it is working fine and Im monitoring it too.
Now the end to end scenario is FTP--->PI--->ECC(R3 system). Please help.Many Thanks. -
Why do we need standby redo log on Primary database.
Hi Gurus,
I was going through the document in OBE,
http://www.oracle.com/technology/obe/11gr1_db/ha/dataguard/physstby/physstdby.htm
I have two queries:
1) I noticed the statement -
"Configure the primary database to receive redo data, by adding the standby logfiles to the primary. "
Why do we have to create standby redo log on a primary database?
2) There is another statement --
"It is highly recommended that you have one more standby redo log group than you have online redo log groups as the primary database. The files must be the same size or larger than the primary database’s online redo logs. "
Why do we need one additional standby redo log group than in Primary database.
Could anyone please explain to me in simple words.
Thanks
Cherrish VaidiyanHi,
1. Standby redo logs are used only when the database_role is standby, it is recommended to be added in primary also so that they can be used on role reversal, however during normal working standby redo logs will not be used at all on primary.
2. In case of 3 online redo log groups, it is recommended to use 4 standby redo log group this is in case if log switching is happening frequently on primary and all 3 standby redo logs are still not completely archived on the standby and 4th can be used here as there will be some delay on standby due to network or slowness of arch on standby.
Use of the standby redo log groups depends on the redo generation rate, you can see only 2 standby redo logs are getting used while you have 4 standby redo log groups, when the redo generation rate is less.
So it is recommended to have one more standby redo log group when redo generation rate is high and all of the existing standby redo log group are getting used.
Regards
Anudeep -
Why do i need to recompile...please help ?
Hi Folks,
Iam in a big debate here concernning a moderately complex application. The application contains 20-30 EJbs and some war files. jar files and they are all packaged into a EAR file.
Please Note: We have to upgrade our weblogic servers from WLS8.1 -sp2 > WLS81-SP3. We have like 10 others application been upgraded, all we did is , just point the application to the new JDK and weblogic version....and they worked superbly !!!
But this application, didn't get deployed when we upgraded. Then i told them (actually one of my friend working in that application team and i told him to recompile the code and give back to me---just for our testing purpose), to recompile the code with newer jdk version. He finally did, and the application get deployed.
Now, the big problem is that the application team(managers and all of them) does not want to do it. .....they are saying that we have to do LOT of work and we will not do RECOMPILE (officially) ...UNLESS and UNTILL if you give them concrete details of "WHY".
Now since iam in server support team, i have very little idea for how to tell that they need this recompilation because of following reasons:
1 ?
2 ?
3 ?
could anybody please tell me some reasons , why an application needs to recompiled for this type of an upgrade ?
your guesses would be ok for me.....
Thanks a ton,
sangitaBTW, this is the exception that i get: ...hey, iam on HP box, and not on SUN box. The other application were upgraded on SUN box only,,,,would that make any difference ???
This is the exception:
####<Oct 22, 2004 8:31:16 PM CEST> <Warning> <Deployer> <ux23> <cdmv_ibm> <ExecuteThread: '2' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <> <BEA-149004> <Failures were detected while initiating Deploy task for application cdmvbase_test8126.>
####<Oct 22, 2004 8:31:16 PM CEST> <Error> <Deployer> <ux23> <cdmv_ibm> <ExecuteThread: '2' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <> <BEA-149201> <Failed to complete the deployment task with ID 1 for the application cdmvbase_test8126.
weblogic.management.ApplicationException:
Exception:weblogic.management.ApplicationException: prepare failed for baseEJB.jar
Module: baseEJB.jar Error: Exception preparing module: EJBModule(baseEJB.jar,status=NEW)
Unable to deploy EJB: baseEJB.jar from baseEJB.jar:
Compiler failed executable.exec
at weblogic.ejb20.ejbc.EJBCompiler.doCompile(EJBCompiler.java:274)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:476)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:407)
at weblogic.ejb20.deployer.EJBDeployer.runEJBC(EJBDeployer.java:493)
at weblogic.ejb20.deployer.EJBDeployer.compileJar(EJBDeployer.java:762)
at weblogic.ejb20.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:700)
at weblogic.ejb20.deployer.EJBDeployer.prepare(EJBDeployer.java:1317)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:498)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.java:3101)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1560)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1208)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1051)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2444)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2394)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2310)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
java.io.IOException: Compiler failed executable.exec
at weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(CompilerInvoker.java:469)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:328)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:336)
at weblogic.ejb20.ejbc.EJBCompiler.doCompile(EJBCompiler.java:270)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:476)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:407)
at weblogic.ejb20.deployer.EJBDeployer.runEJBC(EJBDeployer.java:493)
at weblogic.ejb20.deployer.EJBDeployer.compileJar(EJBDeployer.java:762)
at weblogic.ejb20.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:700)
at weblogic.ejb20.deployer.EJBDeployer.prepare(EJBDeployer.java:1317)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:498)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.java:3101)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1560)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1208)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1051)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2444)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2394)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2310)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2398)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2310)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
--------------- nested within: ------------------
weblogic.management.ManagementException: - with nested exception:
[weblogic.management.ApplicationException:
Exception:weblogic.management.ApplicationException: prepare failed for baseEJB.jar
Module: baseEJB.jar Error: Exception preparing module: EJBModule(baseEJB.jar,status=NEW)
Unable to deploy EJB: baseEJB.jar from baseEJB.jar:
Compiler failed executable.exec
at weblogic.ejb20.ejbc.EJBCompiler.doCompile(EJBCompiler.java:274)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:476)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:407)
at weblogic.ejb20.deployer.EJBDeployer.runEJBC(EJBDeployer.java:493)
at weblogic.ejb20.deployer.EJBDeployer.compileJar(EJBDeployer.java:762)
at weblogic.ejb20.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:700)
at weblogic.ejb20.deployer.EJBDeployer.prepare(EJBDeployer.java:1317)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:498)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.java:3101)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1560)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1208)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1051)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2444)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2394)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2310)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
java.io.IOException: Compiler failed executable.exec
at weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(CompilerInvoker.java:469)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:328)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:336)
at weblogic.ejb20.ejbc.EJBCompiler.doCompile(EJBCompiler.java:270)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:476)
at weblogic.ejb20.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:407)
at weblogic.ejb20.deployer.EJBDeployer.runEJBC(EJBDeployer.java:493)
at weblogic.ejb20.deployer.EJBDeployer.compileJar(EJBDeployer.java:762)
at weblogic.ejb20.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:700)
at weblogic.ejb20.deployer.EJBDeployer.prepare(EJBDeployer.java:1317)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:498)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.java:3101)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1560)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1208)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1051)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2444)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2394)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2310)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
-
Why do we need schema groups ?
Respected gurus!!
While customizing the price calculation techniques we are supposed to form a "schema group" before we assign a pricing procedure to either a vendor or a purchasing organization.
My query is, why do we need to have a schema group in the first place?
We assign the schema group to vendors in either xk02/purchasing organization data or mk02/purchasing organization data screens and to the purchasing organization in customizing.
Why can't we assign the pricing procedures directly, without forming any schema group??
I seek clarification in this regard.
Jaideep>
Priyanka Paltanwale wrote:
> hi,
>
> Yes we provide such attachment because:
>
> 1. SAP makes searching while there are n numbre of calculation schema's available in the system containing diff. conditions...
>
> 2. For this SAP used Schema group in which we group (or better say system auto group) all those schema's which are assigned to same vendor or purchase org or for the combination of Porg./vendor...
>
> 3. So, that when your schema is called system search on the all these levels one by one and if find one, stops n provides the req. data immediatly...
>
> SAP has used this same tech. many places like for eg: account determination where account cata. reference is used for assignments and grouping b/w valuation class and material type...
> Or for message determination...check it out..
>
> Regards
> Priyanka.P
Respected Mam,
Let me get this straight.
We mean that for effective searching of the calculation schema, SAP has used groups? If this be the case, then the system is still searching for the schema, how is the forming of group is helping SAP?
Once again, I thank you very much for your efforts.
Seeking clarification,
Jaideep -
Why do we need a disabled AD object prior to migrating user from one domain to another.
Say i am migrating a user 'Mr.A' mailbox from abc.com to xyz.com in exchange 2010 environemnt, why do i need a disabled AD object for Mr. A in xyz.com prior to migrating ? please suggest.
Aditya MedirattaHi ,
To be frank i am not aware of quest but i can suggest you in ADMT and also in exchange cross forest migration.
I hope you are doing the cross forest migration from exchange forest to exchange forest , so on such case by using the prepare-moverequest.ps1 we can have
only have the disabled MEU on the target exchange forest until the remaining attributes of the user object was migrated from ADMT.
While running the prepare-moverequest.ps1 it will not completely move all the active directory user attributes from the source forest to the target forest
but it will move all the exchange attributes to the target forest and finally it will make the MEU object in the disabled state. Since
all the exchange attributes are already migrated to the target forest ,so prior to use ADMT user account migration we need to exclude the exchange attributes
by running the script on the ADMT server .After doing so exchange attributes will not be migrated but the required user attributes will be migrated to make the MEU to the enabled state.
Reference Link for types of exchange migration between the forest :
http://blogs.technet.com/b/exchange/archive/2010/08/10/3410619.aspx
Thanks & Regards S.Nithyanandham -
Why do we need to declare CATALINA_HOME environment variable in Tomacat?
{color:#ff0000}*Why do we need to set CATALINA_HOME
environment variable while using TomCat and what happens if we do not
{color}
{color:#008000}If anybody has the solution .. please do reply
{color}
Thanks &
Regards, Akshay_LSoulTech2012 wrote:
it makes zero sense because if CATALINA_HOME is not set, then CATALINA_HOME/bin won't resolve at all (unless some form of magic is used)
# Get standard environment variables
PRGDIR=`dirname "$PRG"`
# Only set CATALINA_HOME if not already set
[ -z "$CATALINA_HOME" ] && CATALINA_HOME=`cd "$PRGDIR/.." ; pwd`rightBy "right", are you being sarcastic or are you saying that code is correct?
It's a pretty standard technique for setting default variables under *nix, no magic involved. And this particular example was taken from the Tomcat 5.5.25 startup script.
Maybe you are looking for
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