How to catch SQL Exceptions in JSP

Hi,
I wanted to know how do we catch the correct SQL return code in a JSP page ?
Based on the return code I wanted to display customised Error messages.
But I could'nt figure out a way to get the error message returned by the underlying DB2
database.
I am using Websphere Application Server and the backend database is DB2.

The only way I am aware of is parsing the exception message/the call stack.

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How do catch SQL Exception

I'm using oracle 8.1.7
How do I catch a SQL Excpetion from a JSP page that is trying to delete a Primary key of a referencing table?
When it throws the excpetion...how can I know the error code/number?
or is it just simply give out the reason/explanation without producing any numbers?????

Hi,
Just put your conde inside a try - catch block like Servlets. It will work and show u all the things.
Sundar

How to throw or catch sql exception for executeReader sql adapter

Wcf sql adapter was created and executeReader was used.
When an invalid sql statement was constructed and send it to wcf sql adapter, it will hanging there, and no response. No exception was catched even though send chape  was inside a catch block. How can I catch this kind of exception
or throw this exception ? I need to give client an exception resposne.
thanks
Gary

I used scope with exception handle which has Exception object type: "System.SystemException".
I guess this type "System.SystemException" can catch any exception, including sql exception. Maybe I am wrong. I got error from window event:
A message sent to adapter "WCF-Custom" on send port "WcfSendPort_SqlAdapterBinding_DalCore_Custom" with URI "mssql://shig-quad-2k3e1//DataSourceOne?" is suspended.
Error details: System.Data.SqlClient.SqlException: Incorrect syntax near '='.
Server stack trace:
   at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndRequest(IAsyncResult result)
Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
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   at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.RequestCallback(IAsyncResult result)
MessageId: {B24EF5B8-298A-4D4F-AA98-5E639361A7DB}
InstanceID: {F8924129-265B-4652-B20E-8D25F8F20A51}
If "System.SystemException" can't catch all exception, which type can catch all exception ? I want to catch all exception in this catch block.
thanks
Gary

How to catch up Exception message?

i have a question while using try{ ... }catch{ ... } clauses. for when update, delete, databse, there might be error occurred. all to often i do not deal with the message, only if to check log when serious problem i have to find it out; but i hope to learn how if i am able to display message of my own while erro occurrs. for instance, when falling into SQLException, originaly i might just utilize
}catch(SQLException e){
e.printStackTrace();
is it possible for me to catch up message inside the printStackTrace that may happen while errors appearing? (or only down to catch{} clause be the last deadline that i am able to use? because i hope i am able to capture error code like ora-1234 and tranlate it into messages that user, who doesn't know too much about pc, can understand easily while reporting bug; and not just saying "we have problem here!")
that is, if 'A' situation popping out, i hope to direct it to error page with special message shown. so does the same error page with different message specified while 'B' situation found out!
any suggestions would be appreciated~
thanks in advice,

printStackTrace isn't obligatory. It's basically what you do with an exception when you don't have anything more specific to do with it.
You can certainly catch a specific exception at any level, including inside another try {} block.
Even having caught an exception you can decide that you don't want to handle it at this point in the code, and throw it again.
You might do:
try {
     try {
       ... statment which migh cause a particular database exception
        } catch(SQLException e) {
        if(e.getMessage().startsWith("ORA-1232")) {
          .. do somthing usefull
         } else
        throw e;   // the particular SQL exception was unexpected so go on and crash
   catch(Exception e) {
     e.printStackTrace();   // unexpected program failure

How to handle sql exceptions properly

Hi,
Using Jdev 11.1.1.1.0 and JPA/Toplink
Our application is used to modify a number of different tables. The tables are mapped in EJB entities and are exposed in session beans which calls the proper methods from the DAOs. We use ADF Rich components in our view project and we have a lot of validation for preventing primary key violations etc. But obviously we can't control everything and we need some exception handling. As it is now, if e.g an sql exception occurs, it will pop up a huge error dialog with the stack trace and the page rendering will fail etc and sometimes needs to restart.
So, I'm not sure how to approach this. How do we catch these exceptions, notify the user, and stop the page rendering so that it doesn't completely shut down...I've searched around and found some useful information, but since we've never done this before it's a little hard to put things together. Could you please give me some easy examples for this?
Thank you!
André

Hi, thanks for your reply.
Yes, I have tried to override both getDisplayMessage and reportException. I now used the exact same code as in the example you referred to, and still I get the same result.
So just to make it clear... If do an insert that causes integrity constraint violation, I get in my console:
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint violated
Error Code: 1
Call: INSERT INTO etc etc... When this happens, a huge popup appears in my page:
javax.ejb.EJBException: BEA1-002236FD9E083057A4BD: weblogic.transaction.internal.AppSetRollbackOnlyException
     at weblogic.transaction.internal.TransactionImpl.setRollbackOnly(TransactionImpl.java:551)
     at weblogic.transaction.internal.TransactionManagerImpl.setRollbackOnly(TransactionManagerImpl.java:319)
     at weblogic.transaction.internal.TransactionManagerImpl.setRollbackOnly(TransactionManagerImpl.java:312)
     at org.eclipse.persistence.transaction.JTATransactionController.markTransactionForRollback_impl(JTATransactionController.java:145)
     at org.eclipse.persistence.transaction.AbstractTransactionController.markTransactionForRollback(AbstractTransactionController.java:196)
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.rollbackTransaction(UnitOfWorkImpl.java:4486)
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1351)
     at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:468)
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1398)
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3022)
     at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:224)
     at ...................................etc etcThis is what I want to replace with an understandable message to the user. And this is what the custom error handler should do right?? There must be something I have misunderstood...

How to catch ALL Exception in ONE TIME

I'm explain my issue:
I'm making a program with Class, Swing, Thread ...
Then all action I do on my graphical application, I use a new thread, well
I want to capture in my Startup programs, all unknow exception and then, I display it with a JOptionPane for example
In fact, I want to do something like Eclipse, when it crash, I capture the error
Could you help me ? Tell me the best way to do that ?
This is an exemple
FILE: Startup.java
class Startup{
public static main (String args[]){
try{
new Main();
}catch(Throwable e){
//Message d'erreur fenetre
FILE: Main.java
class Main{
Main(){
init_action();
void init_action(){
mybutton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
Thread th=new Thread(){
public void run(){
int a = 1 / 0;
th.start();
Well, in this example I want to capture the Divide By 0, I use the Throwable Exeption, in order to be sure I catch all unknow exeption
Then, a good job, is to put throws Throwable in all function
but Thread, and ActionPerformed ... could not implement it
How to put this exception and jump it to Startup Program ?

I already do that, what can I do for improving capture ?
That's impossible ... It will be a great idea to make a Redirection of Error to a Exception class in futur version
For example, when an unknow error arrive, don't show it on console and crash ... but run a class redirector exception, and magic, it show you a beautiful error warning, and stop properly the programme ...
I put an error class, and put try {] catch {} everywhere, and run my exception class,
this class detect the error exception and run a properly beautiful and clear french message (I'm french :d)
Well, If you have the BEST other idea, tell me, I read your message with a lot of regard
see you soon
bye

Catching sql exception

Hi,
Is there any other way to catch primary key violation error other than catching the sql exception and checking the pattern in the exception trace.
Thanks in advance,

Basil wrote:
Hi,
Is there any other way to catch primary key violation error other than catching the sql exception and checking the pattern in the exception trace.You could try looking at the SQL state or vendor code from the SQL exception. They might have more information, along the lines of what you are looking for.
If you are looking to avoid the exception altogether forget it. You could do a SELECT before INSERT but that of course isn't concurrency "safe" and generally is just a waste of time.
PS In future JDBC related questions should be posted into the JDBC forum. Selecting the best forum for your question gives you a better chance of getting better answers faster.

How To Handle SQL Exceptions in Session EJB Bean

Hi,
we are working on toplink JPA. My use case is I have an emp table with columns as "empid" , "emp name" , "job" with "empid" as primary Key. Here I'm creating a record in the Database by using a jspx page. Here My problem is when I'm entering a duplicate value for the empid I'm getting "ORA-00001: unique constraint (constraint_name) violated" . I'm able to catch the exception in the jspx backing bean where I'm calling the JPA insert method, But i could not catch the exception in the sessionEJB Bean. Is there any way to catch such exception in the sessionEJB.
could anyone help me out.
Thanks in Advance.
regards,
PrapanSol

You should be able to call flush on your EntityManager in your SessionBean to trigger the exception.
Note that the transaction will still be rolled back even if you catch this exception.

How To Handle SQL Exceptions in JPA

Hi,
we are working on toplink JPA. My use case is I have an emp table with columns as "empid" , "emp name" , "job" with "empid" as primary Key. Here I'm creating a record in the Database by using a jspx page. Here My problem is when I'm entering a duplicate value for the empid I'm getting "ORA-00001: unique constraint (constraint_name) violated" . I'm able to catch the exception in the jspx backing bean where I'm calling the JPA insert method, But i could not catch the exception in the sessionEJB Bean. Is there any way to catch such exception in the sessionEJB.
could anyone help me out.
Thanks in Advance.
regards,
PrapanSol

You should be able to call flush on your EntityManager in your SessionBean to trigger the exception.
Note that the transaction will still be rolled back even if you catch this exception.

Catching SQL Exceptions

Hi all,
I have a bit of java code which is performing an SQL insert on a table. There is a possibility of a database foreign key exception being generated on this insert statement. I wish to catch this particular exception, log it and then ignore it and move to the next statement. Currently the code is catching SQLException, is a foreign key exception something that I can uniquely catch, or is it rolled up into SQLException. I haven't had luck finding any docs on this subject, any help would be appreciated.
Thanks.

Maybe I'm not understanding something here but is it
not a bit dodgy to be relying on the presence of a
foreign key constraint on the DB to raise the problem
in the client? Personally I would be writing code to
check if a foreign key constraint error will be raised
by the inserting of the record. I will admit though
that this could be a bit clunky and more time
consuming (checking through select statement then
doing insertion if OK) as well as a possible insertion
of the record just after your select statement
returned saying that you couldn't insert the record
because a foreign key constraint would be raised.I disagree. IMHO, the OP's way of doing it is the proper approach--let the database worry about the data integrity. It's made to be very good at that, and that's where the constraints are defined. If you put that code in the client, you have to duplicate the constraints you put into your DDL in your client code.

SOAP-XI-RFC sync without BPM scenario: How to catch timeout exception in PI

Hi all
I made a scenario where a Webservice request was placed via XI to RFC in CRM.
This is all done without BPM.
Now the request came up that I have to handle undhandled exceptions from RFC such as Fatal Error, Dump in CRM etc in PI so that customer can get the idea of what happend in the Backend rather PI failing in the monitoring. I did that in CRM by catching all the exception and sending a common error message to PI.
But another requirement is to handle Message Timeout of the RFC in PI for e.g. If the request goes to the RFC and due to the volume of the data, it gets Timed Out then neither PI nor CRM can handle this and it results in PI failing to catch this excpetion.
I tried Fault message type but that does not help either.
Can I get some expert advice.
Regards
Naina

Include your Send_to_RFC step inside a Block...have a deadline branch for this and an Exception Branch....in deadline branch have control step (thro Exception)....in Exception Branch have a Mapping and a Send Step....this mapping will produce a message (define separate DT for this) having constant values (like timeout occured message)
If you are fine with alert message...then instead of Mapping and Send step in Exception include a Control Step (thro alert)....alert message can be "timeout occured in receiving RFC response"
Regards,
Abhishek.

How to catch exception in JSP????

how to catch exception in JSP?
I use JDeveloper 3.1
I use connection with database .
When I insert record in database
when have duplicate of primary key
how to catch this exception and
back to previous page?
I trying with folowing:
<jsp:useBean id="RowEditor" class="oracle.jbo.html.databeans.EditCurrentRecord" scope="request">
<% try {
RowEditor.setUseJS(true);
RowEditor.initialize(pageContext, "package2_Package2Module.Drzavi1View");
RowEditor.setSubmitText("Save");
RowEditor.setTargetUrl("Drzavi1View_SubmitInsertForm.jsp");
RowEditor.createNewRow();
RowEditor.setReleaseApplicationResources(true);
RowEditor.render();
catch(Exception e) {
%>
<script>
alert("primary key duplication");
history.back();
</script>
<% } %>
but i't not working
please help me

i catch exceptions as you do, i don't have any problem...
are you throwing the exception from your bean?
actually i don't catch an Exception, but an SQLException...
but it works... here is my code...
try
myclass.addElement(); // this is an insert into Oracle
catch( DataBaseFailException e ) /// an exception that i throws inside after i receive an SQLException
session.setAttribute("gMessage","e.getMessage()); // error code

How to use customized exception

Hi all,
I have a problem using struts-action-mappings.
I have a method for update in my app module, and i'm using that method with data action.
In that method, I have to throw my customized exception to user if there is error. I just don't know how to catch the exception and display it in page.
I've read about struts page flow diagram elements and know there are Exceptions and Global Exceptions. But i still don't know how to use them.
What i want to know is can I relate my custom exception with Exceptions/Global Exceptions in struts diagram? And if so, can anybody show me an example for it?
Thanks

1.Create a method GET_ACTORS using RH_GET_ACTORS,
2.Create a container element 'Actors' type string with multiline.
3.Create Task, where you can call the Method GET_ACTORS and pass the Container values of 'Actors' from Method->Task->Workflow
4.Create a Step type before creating the Step mail and include the previous Task.
5.Now you can create the step Mail. Give the Recipient Type as 'Expression'-> Select the Container Element 'Actors' from WF container
But remember the values should be Passed from the task to Workflow in Binding correctly.
Regards,
Sriyash

How to use jsf2 exception handled

hi,
i'm a new to jsf2
i want to catch the exception from action, and show it on a pop page, or alert the exception message in JS.
but i don't know how to catch the exception from service(like action, ejb), and show it on client(like page or js).
i'm try to user A4J.Ajax.onError (i use jsf 2 and richfaces4), but there is a js error A4J is not defined.
please help~

i'm try to user A4J.Ajax.onError (i use jsf 2 and richfaces4), but there is a js error A4J is not defined.Yes so you are doing it wrong and you need to read the manual. Fixing errors is a big part of your job you know, running to a forum the first hitch you get is not going to make you a valuable contribution to the software development market.
http://www.jboss.org/richfaces/docs

Catch multiple exceptions ?

hi,
can some1 tell me how to catch multiple exception like this :
try
catch (IOException e, NullPointerException ne, customizedException me)
is it possible ?

try this way.......
try{
catch(IOException e)
catch(Exception ee)
and take care of the order of the exceptions being thrown.( Exception of lowest order shoulh be caught first)
hope this helps
regards
harpreet

How to catch SQL Exceptions in JSP

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