Handling the exceptions ...

Hi guys,
I am totally new to Java world and have come from VB background. I found the process of exception handling pretty hard. How can some one memorize all the error objects for a particular type of error eg IOexception, MalFormedUrlException, NumberFormatException ... etc. Maybe i am wrong. Is there any common object that handle all these exceptions? or what is the solution how can i anticipate my errors ahead of time? and any better way to remember all these Exception?
I will appreciate any comment.
abdul

There is a parent exception 'Exception' that all detailed exceptions are extended from. You can use it to cast a wide net, and use detailed exeptions when you need more detail.
e.g.
try {
// do something
catch(Exception e){
// handle exception
finally {
// do something
B

Similar Messages

How to handle the Exception when RegisterEventProcessorAsync

In our Cloud Service project, we have 2 instances for work role (deploy to Azure), the work role is consume events from the EventHub using EventProcessorHost).
When we want to register EventProcessor to consume data (see below):
await eventProcessorHost.RegisterEventProcessorAsync<eventProcessor>();
Sometimes we will got the Exception:
Microsoft.WindowsAzure.Storage.StorageException: The remote server returned an error: (412) There is
currently a lease on the blob and no lease ID was specified in the request.. ---> System.Net.WebException: The remote server returned an error: (412)
There is currently a lease on the blob and no lease ID was specified in the request..
at Microsoft.WindowsAzure.Storage.Shared.Protocol.HttpResponseParsers.ProcessExpectedStatusCodeNoException[T](HttpStatusCode expectedStatusCode, HttpStatusCode actualStatusCode, T retVal, StorageCommandBase`1 cmd, Exception ex)
 at Microsoft.WindowsAzure.Storage.Shared.Protocol.HttpResponseParsers.ProcessExpectedStatusCodeNoException[T](HttpStatusCode expectedStatusCode, HttpWebResponse resp, T retVal, StorageCommandBase`1 cmd, Exception ex)
 at Microsoft.WindowsAzure.Storage.Blob.CloudBlobSharedImpl.<DeleteBlobImpl>b__1b(RESTCommand`1 cmd, HttpWebResponse resp, Exception ex, OperationContext ctx)
 at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndGetResponse[T](IAsyncResult getResponseResult)
 --- End of inner exception stack trace ---
 at Microsoft.WindowsAzure.Storage.Core.Util.StorageAsyncResult`1.End()
 at Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob.EndDeleteIfExists(IAsyncResult asyncResult)
 at Microsoft.WindowsAzure.Storage.Core.Util.AsyncExtensions.<>c__DisplayClass1`1.<CreateCallback>b__0(IAsyncResult ar)
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
 at Microsoft.ServiceBus.Messaging.BlobLeaseManager.<DeleteAllAsync>d__2a.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
 at Microsoft.ServiceBus.Messaging.EventProcessorHost.<InitializeAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
 at Microsoft.ServiceBus.Messaging.EventProcessorHost.<StartAsync>d__e.MoveNext()
 --- End of inner exception stack trace ---
 at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
 at System.Threading.Tasks.Task.Wait()
at awaiteventProcessorHost.RegisterEventProcessorAsync<eventProcessor>();
If we got the Exception, we won’t got messages any more.
From the Call Stack, we found it was cause by delete the Blob. So we wonder that, when we call
RegisterEventProcessorAsync,
the hub will delete the blob and renew one in Storage?
If we delete the blob for the EventHub manually and then run our server again. It worked as usual.
But we can do it like this way manually, so is there any way to handle the exception in code to make the EventProcessorHost worked?
Thanks so much!

If we use different blob container name for different EventProcessorHost, is it a workaround for the issue?
 var
eventProcessorHost = new
EventProcessorHost(
 hostName,
 hubName,
 consumerGroupName,
 serviceBusConnectionString,
 storageConnectionString,
leaseContainerName);

How to handle the Exception in GP using executable callabel object.

Hi all,
I handled an exception in GP using Background callable Object. That is working fine.
(Ex: Exception_No_User_Found). The Problem is I am not able to handle the exceptions for normal callable object. I have done the same thing as i did in background callable object except implementing IGPBackgroundCallableObject Class. I have created an WebDynpro DC Project where in getDescription method i declared an Exception and in execute method of component controller I caught the exception if no user found.
Then i created an callable object for this simple DC project. but that is not working i could not catch the exception. when i execute the process it is asking the User ID if i give the wrong userId it is not refreshing back to the user id input form.
But if i test that simple callable object separately it is throwing an Exception when I give the wrong input..
but the same thing is working fine using background callable object.
I couldn't handle the exception for the simple callable object or executable callable object.
Please If anyone bring me the solution that would be appreciated.
Thanks in advance.
Regards,
Malar.

Hi Shikhil
Thanks for your reply
Please have a look below for exceptions which i am getting in GP and let me know how to handle these exceptions.
1) "Activity could not be read"
2) "Action has been stopped"
3) error while processing the item can not be displayed
if you give any idea/clue how to handle these exceptions then it would be great help to me
Thanks
Sunil

Create wrapper to FM and handle the exceptions

HI All
I need to create wrapper FM to fm BDC_RECORD_TRANSACTION like zBDC_RECORD_TRANSACTION.
the parameter should be the same and my question is how to handle the exceptions
do i need to keep the exception in the wrapper fm exactly the same i.e.
exactly the same signature for the exception and noting more or I need to add
additional coding to handle it .
CALL FUNCTION 'BDC_RECORD_TRANSACTION'
 EXPORTING
 tcode = tcode
 authority_check = 'X'
 OPTIONS = ' '
 mode = 'A'
 UPDATE = 'A'
 TABLES
 dynprotab = dynprotab
 messtab = messtab
 EXCEPTIONS
 system_failure = 1
 invalid_transaction = 2
 invalid_mode = 3
 invalid_update = 4
 OTHERS = 5.
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Regards
Chris

HI
do you mean like this ?
CALL FUNCTION 'BDC_RECORD_TRANSACTION'
 EXPORTING
 tcode = tcode
 authority_check = 'X'
 OPTIONS = ' '
 mode = 'A'
 UPDATE = 'A'
 TABLES
 dynprotab = dynprotab
 messtab = messtab
 EXCEPTIONS
 system_failure = 1
 invalid_transaction = 2
 invalid_mode = 3
 invalid_update = 4
 OTHERS = 5.
IF sy-subrc <> 0.
 CASE sy-subrc.
 WHEN 1.
 RAISE system_failure.
 WHEN 2.
 RAISE invalid_transaction.
 WHEN 3.
 RAISE invalid_mode.
 WHEN 4.
 RAISE invalid_update.
 WHEN OTHERS.
 ENDCASE.
Thanks
Chris
Edited by: ChrisGW on Mar 16, 2011 11:40 AM

Throwing or handling the exception.

Hi,
Which is the good idea.
*1 .* throwing the exception to the caller method.
*2 .* handle the exception at the save place.(with the help of try/catch).
Any pointer will be highly appreciated.
Regards,
Alok

Usually #1, though sometimes you'll wrap it in an exception more appropriate for that layer.
To handle the exception, you have to truly handle it.You have to provide a correction for whatever went wrong. That might mean retrying or using some default value or calling some other "safe" algorithm. If you can't actually fix it, you have to throw something to let the caller know what went wrong. It's then up to him to determine whether to handle it or throw it to his caller.

How to handle the exception in GP(Exception : Activity could not be read)

Hi all
we are getting the GP exceptions as 1) "Activity could not be read" 2) "Action has been stopped"
3) error while processing the item can not be displayed
Please let me know how to handle these exceptions in GP .
currently i got some documents in SDN on GP exceptions but those are related to manual exceptions for example if you enterd wrong data in the inputfield then we can handle those exceptions then it will allow to enter the new value but the exceptions which i mentioned above are new it seems
can you please let me know how to handle or solve those 3 exceptions
Thanks
bindu

Hi Shikhil
Thanks for your reply
Please have a look below for exceptions which i am getting in GP and let me know how to handle these exceptions.
1) "Activity could not be read"
2) "Action has been stopped"
3) error while processing the item can not be displayed
if you give any idea/clue how to handle these exceptions then it would be great help to me
Thanks
Sunil

How to handle the exception com.sun.xml.internal.messaging.saaj.SOAPExcepn

hi,
I am accessing wsdl to get all the required data and the connection is establishing successfully thru java code but when i am calling the create user api the following exception is coming
"com.sun.xml.internal.messaging.saaj.SOAPExceptionImpl: No NamespaceURI, SOAP requires faultcode content to be a QName"
please tell me what is faultcode means and how to solve this exception

Hi,
Whenever there is any error inside the WebService or while it's processing ...it throws Exceptions ..We can handle these exception by our own to make the Exception details more readable.....For that we can create our own SOAPFault message...
Please refer to the below Posts...
1). If you are using JAXWS Style of WebService then : http://middlewaremagic.com/weblogic/?p=713
2). If you are using JAXRPC Style of WebService then : http://middlewaremagic.com/weblogic/?p=721
Thanks
Jay SenSharma
http://middlewaremagic.com/weblogic (Middleware magic Is Here)

How to handle the exception in AWT-EventQueue-0?

This is my code:
import javax.swing.JFrame;
public class MainFrame extends JFrame {
     public MainFrame(){
          init();
     public void init(){
          setSize(100,100);
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
public class SubFrame extends MainFrame implements ActionListener{
     private JButton button1 = null;
     public SubFrame(){
          super();
     public void init(){
          super.init();
          button1 = new JButton("button1");
          add(button1);
          button1.addActionListener(this);
     public void actionPerformed(ActionEvent e) {
          // TODO Auto-generated method stub
          button1.setEnabled(false);
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          (new SubFrame()).setVisible(true);
}When I click the button, this exception will be thrown:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
     at swing.SubFrame.actionPerformed(SubFrame.java:23)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
     at java.awt.Component.processMouseEvent(Component.java:6038)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
     at java.awt.Component.processEvent(Component.java:5803)
     at java.awt.Container.processEvent(Container.java:2058)
     at java.awt.Component.dispatchEventImpl(Component.java:4410)
     at java.awt.Container.dispatchEventImpl(Container.java:2116)
     at java.awt.Component.dispatchEvent(Component.java:4240)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
     at java.awt.Container.dispatchEventImpl(Container.java:2102)
     at java.awt.Window.dispatchEventImpl(Window.java:2429)
     at java.awt.Component.dispatchEvent(Component.java:4240)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Darryl.Burke wrote:
Hmm. Interesting sequence of execution.
+-- new SubFrame () calls the sub class constructor
+---- which calls the super class constructor explicitly
+------ which calls init () of the sub class
+-------- which calls init () of the super class
and only after all these calls return, the declaration-cum-assignment of button1 is executed, which makes button1 null.
(Discovered by putting a breakpoint on that line and debugging in NetBeans)
With one change, button1 will not be null and the breakpont is not reached.private JButton button1;// = null;What's not clear is why the declaration-cum-initialization takes place after the constructor code executes, shouldn't it run before the constructor?
It does run before the SubFrame constructor, but it runs after the super class constructor, which is exactly how the language specification says it should be.
There was a similar thread a while back:
http://forum.java.sun.com/thread.jspa?threadID=5190252&messageID=9745092
Note that there is another "bad" habit involved (other than explicitly initializing member variables to null): that an overridden method is called from the super class constructor. That means that the overridden method will be executed before the object it belongs to has been fully initialized, and that will often lead to confusing behavior like this.

Handling the exception in BizTalk WCF-SQL Receive Adapter

As per Application, BizTalk connecting to SQL Server and executing the SP for polling the data. Occasionally we are getting Timeout SQL exception in event log.
Customer is asking why not BizTalk handling this kind of error messages.
Please let me know how to handle exceptions in WCF Receive location.already i set the properties like Suspend request
message on failur and Include exception details in faults
But the error message is returning in Eventlog and not reaching to biztalk
one of the error message is
Another one is :
DB locks happening in SQL Server

Yes definitely, you can "Enable routing for failed messages" and subscribed to the failed message.
Later you can create a send port or orchestration with below filter conditions-
"ErrorReport.ErrorType == Failed Message" .
BizTalk demotes all the properties of this message to avoid unwanted subscription and promotes only below mentioned properties under ErrorReport namespace.
Description
ErrorType
FailureCategory
FailureCode
InboundTransportLocation
MessageType
OutboundTransportLocation
ReceivePortName
RoutingFailureReportID
SendPortName
Check the below articles which provide good sample for the same.
error-message-routing-pattern-demo-in-biztalk
http://mscerts.programming4.us/application_server/biztalk%202009%20%20%20handling%20failed%20messages%20and%20errors.aspx
Using Failed Message Routing
You can also setup Backup transport feature, which will only get activated in case of failure.
You can configure it to send emails as well.
How to Configure Backup Transport Options for a Send Port
Which one to choose between the two-
Using the backup transport for SMTP would allow you to send an email, but that’s normally not a good solution because you’ll just get that message, with no context, and not really know what to do with it. Failed message routing will let you setup filters
based on the failures (types, descriptions, etc) and this way you can organize how you handle failures. If a pipeline validation fails you can send the message to one place to be repaired where as if a transport fails (or something else) it can be handled
in a different way.
https://social.msdn.microsoft.com/Forums/en-US/09256232-d92a-448b-9c8d-db6144afee84/enable-routing-for-failed-messages-versus-backup-transport?forum=biztalkgeneral
Thanks,
Prashant
Please mark this post accordingly if it answers your query or is helpful.

How to Handle the exception while perform multiple insert in a procedure?

CREATE OR REPLACE PROCEDURE MUL_INS_EXCE AS
CURSOR C IS SELECT EMP_NO,EMP_NAME,EMP_AGE FROM EMP;
EMP_RECORD EMP %ROWTYPE;
BEGIN
OPEN C;
LOOP
FETCH C INTO EMP_RECORD;
EXIT WHEN C%NOTFOUND;
INSERT INTO (SELECT NO,NAME,AGE FROM E1 WHERE AGE >=23 WITH CHECK OPTION VALUE(EMP_RECORD.EMP_NO,EMP_RECORD.EMP_NAME,EMP_RECORD.EMP_AGE);
END LOOP;
CLOSE C;
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(SQLERRM);
END;
I try to insert the record from emp into e1 table with some condition using the procedure. If run this procedure it insert record with check the age > =23. The conditions is not satisfied, exception is thrown procedure will terminate. Again i run this procedure, it will insert the from first. but i want, insert rest of the records. pls help me.

>
CHange your insert code like below....it should work
If emp_record.age > 23 Then
Insert into table name (fileld......) values(values)...............
End If;;
>
CREATE OR REPLACE PROCEDURE MUL_INS_EXCE AS
CURSOR C IS SELECT EMP_NO,EMP_NAME,EMP_AGE FROM EMP;
EMP_RECORD EMP %ROWTYPE;
BEGIN
OPEN C;
LOOP
FETCH C INTO EMP_RECORD;
EXIT WHEN C%NOTFOUND;
INSERT INTO (SELECT NO,NAME,AGE FROM E1 WHERE AGE >=23 WITH CHECK OPTION VALUE(EMP_RECORD.EMP_NO,EMP_RECORD.EMP_NAME,EMP_RECORD.EMP_AGE);
END LOOP;
CLOSE C;
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(SQLERRM);
END;
I try to insert the record from emp into e1 table with some condition using the procedure. If run this procedure it insert record with check the age > =23. The conditions is not satisfied, exception is thrown procedure will terminate. Again i run this procedure, it will insert the from first. but i want, insert rest of the records. pls help me.

How to handle the exception

I have worked out in similar fashion as given in site
"http://stardeveloper.com/articles/display.html?article=2001101101&page=1"
But iam not getting output.
I used tomcat server.
The result i got is
Sending failed; nested exception is: javax.mail.MessagingException: Unknown SMTP host: mail.yourisp.com; nested exception is: java.net.UnknownHostException: mail.yourisp.com
Please reply me at earliest.
I need it for my project

Hi,
This is not the correct forum for questions such as these. This forum is for the email server software, not for java code development.
A quick look at the error though indicates that you have the value "mail.yourisp.com" used somewhere in your code. This is NOT a valid mail-host address. You should be using something that matches your own ISP's mail-host.
Regards,
Shane.

About the BSP:How should i handle the exception

Web is below:
Error when processing your request
What has happened?
The URL http://sapcidev01.autodesk.com:8000/sap/bc/bsp/sap/zixos_test/result.htm was not called due to an error.
 Note
The following error text was processed in the system D50 : The current application triggered a termination with a short dump.
The error occurred on the application server sapcidev01_D50_00 and in the work process 1 .
The termination type was: RABAX_STATE The ABAP call stack was:
Form: DIALOG_CHECK of program CL_IMC_MODE===================CP
Form: PREPARE_MODE of program CL_IMC_MODE===================CP
Form: GET_MODE_BY_NAME of program CL_IMC_MODE===================CP
Form: SEND_COMMAND of program CL_DV_IMC_CLIENT==============CP
Form: PROCESS_COMMAND of program CL_DV_SDV=====================CP
Form: DISP_DOC of program CL_DV_SDV=====================CP
Form: DISP_AO_DOC of program CL_DV_SDV_AO==================CP
Form: DISP_AO_DOCS of program CL_DV_SDV_AO==================CP
Function: ALINK_DISPLAY_IMC of program SAPLALINK_DISPLAY_DOCUMENT
Function: ARCHIVOBJECT_DISPLAY of program SAPLOPTA
What can I do?
If the termination type was RABAX_STATE, then you can find more information on the cause of the termination in the system D50 in transaction ST22.
If the termination type was ABORT_MESSAGE_STATE, then you can find more information on the cause of the termination on the application server sapcidev01_D50_00 in transaction SM21.
If the termination type was ERROR_MESSAGE_STATE, then you can search for more information in the trace file for the work process 1 in transaction ST11 on the application server sapcidev01_D50_00 . In some situations, you may also need to analyze the trace files of other work processes.
If you do not yet have a user ID, contact your system administrator.
Error code: ICF-IE-http -c: 151 -u: 117846 -l: E -s: D50 -i: sapcidev01_D50_00 -w: 1 -d: 20070320 -t: 062938 -v: RABAX_STATE -e: MESSAGE_TYPE_X
HTTP 500 - Internal Server Error
Your SAP Internet Communication Framework Team
Run ST22 and information is below:
Source Code Extract
Line SourceCde
 1 METHOD DIALOG_CHECK.
 2 DATA: GUI_FLAG TYPE SY-BATCH.
 3
 4 * IMC NUR in Online-Modus ? (kein Batch und dunkle Batch-Input-Betrieb)
 5 IF GUI_IS_ON IS INITIAL.
 6 CALL FUNCTION 'RFC_IS_GUI_ON'
 7 EXPORTING
 8 LOGIN_CHECK = ' '
 9 IMPORTING
 10 ON = GUI_FLAG.
 11
 12 IF GUI_FLAG <> 'Y'.
 13 IF RABAX IS INITIAL.
 14 CLEAR EXISTS.
 15 ELSE.
>>>>> MESSAGE X005(IMC).
 17 ENDIF.
 18 ELSE.
 19 GUI_IS_ON = 'Y'.
 20 EXISTS = 'X'.
 21 ENDIF.
 22 ELSE.
 23 EXISTS = 'X'.
 24 ENDIF.
 25
 26 ENDMETHOD.
Who can help solve the problem?
I appreciate your help.

DAniel,
Did you activate ur appln in SICF trnx ?
Are you able to access the standard BSP Appln -> tutorial_1 ?
if not,
BSP call : type of termination: RABAX_STATE
Rgds,
Jothi.P
P.S : Post this in BSP Forum for better and quicker response.

EDI batching issue while handling the exception.

I am trying to batch the inbound IDOC message coming throught external release as the requirement is to batch the EDI messages
for every IDOC having multiple BGM's. For eg if the 1st IDOC has 4 BGM's and second Idoc has 3 BGM's there should be 2 different batches
of EDI each for 1 idoc.
Achived this using external release trigger and delay mechanism, however if suppose the 1st Idoc fails to process in the 3rd message due to mapping
issue then the previous 2 BGM's and already sent to the messagebox and subscribed by the batching orchestration. And when the second message is arriving
with suppose 3 BGM's, the 2 BGM's are getting batched with them..
For eg : 1st IDOC - 4 BGM repeating record -- 3rd is failed in orchestration looping but previous 2 are already sent to messagebox and subscribed by batching orchestration
2nd IDOC - with 3 BGM are processed successfully and then releasing an external trigger making the previous 2 also to get batched with the 2nd IDOC.
My requirement is if there is any mapping issue then the previous BGM's which are sent should not get batched by the batching orchestration.
Could anyone please suggest on the same?

If third message fails, what do you want to do with previous messages? I think your batching orchestration should deal with incomplete batch after a period of time. You anyways won't be able to retrieve idoc second time.
Secondly, It looks like you want to build create atomatic type of solution, for this you need to have one buffering place where you keep all successfully mapped messages intermediately. Again you need control message mechanism to notify batch complete etc.
(Perhaps you need to explore more on batching orchestration itself).
Another thing, if sap doesn't send single batch into multiple idocs, then you can probably create an orchestration to create whole batch and send control message to trigger edi batching.
If this answers your question please mark it as Answer and if this post is helpful, please vote as helpful. Thanks !

Error in Raising exceptions in a method and handling the same in the WF

Hi All
I tried to implement Raising exceptions in a method and handling the same in the workflow
in the same way given in SAPtechnical site .
1.by adding a error msg in exception parameter .
2. if the select query fails, to fetch the agent then :exit_return 9001 'ztable name' space space space.
3.in the Background activity in which this method is called there automatically one outcome appears ,and I hav acitvated that outcome and in that done what need to be done for that error handling - just send a mail to concern person .
4. in the normal outcome of the activity , the step to be executed are there .
but its not working , if exception come then the WF stuck there only . it do not follow the exception outcome .
Kindly help me , How can I do the exception handly in WF.
thanks & Regards
Kakoli

> That is usually the case - you catch an error in the underlying program and pass that back so the workflow can go into error.
> You're doing it correctly.
I don't think that's quite right.
If you define an error/exception in a method, it is automatically mapped to an outcome of the step/task.
If you activate that outcome, then you can handle the exception in a branch of the workflow.
For example: 'Remote connection is down, please contact Basis'
The step should only go into error if an outcome occurs that you have NOT activated.
So the original question is valid. Please give some more information on what the error message is..
chrs
Paul

Exception Handling Standards -The exception Exception should never been thrown. Always Subclass Exception and throw the subclassed Classes.

In the current project my exception handling implementation is as follows :
Exception Handling Layer wise :
DL layer :
catch (Exception ex)
bool rethrow = ExceptionPolicy.HandleException(ex, "Ui Policy");
if (rethrow)
throw;
BL Layer
catch (Exception ex)
bool rethrow = ExceptionPolicy.HandleException(ex, "Ui Policy");
if (rethrow)
throw;
UI Layer
catch (Exception ex)
bool rethrow = ExceptionPolicy.HandleException(ex, "Ui Policy");
if (rethrow)
Response.Redirect("ErrorPage.aspx", false);
We have a tool to check the standards. And tool output is as follows :
The exception Exception should never been thrown. Always Subclass Exception and throw the subclassed Classes.
I need suggestions on how to implement the same according to standards.

Your tool is wrong if it says to never throw Exception. This was a common recommendation back in the .NET v1 days but has long since been thrown out. It is perfectly fine to use Exception when you have a general exception that provides no information
that an application can use to make an informed opinion.
The general rules of exception throwing is to throw the most specific exception that makes sense. If there is no specific exception that applies and it would be useful for the caller to handle the exception differently than other exceptions then creating
a custom exception type is warranted. Otherwise throwing Exception is reasonable. As an example you might have an application that pulls back product data given an ID. There is no built in exception that says the ID is invalid. However an invalid ID
is something that an application may want to handle differently than, say, an exception about the product being discontinued. Therefore it might make sense to create an ItemNotFoundException exception that the application can react to.
Conversely there is no benefit in having different exception types for disk full and disk quota met. The application will respond the same in either case.
Michael Taylor
http://blogs.msmvps.com/p3net

Handling the exceptions ...

Similar Messages

Maybe you are looking for