Generalised Event Exception Handler

Hi all experts,
Can anybody plz tell how to create a generalised Exception Handler , so that wenever a exception is generated in the main method the Exception Event Handler shud be initialised to catch the exception for all the exceptions generated at runtime.
I want the Exception Event Handler to catch the exceptions for RFC BAPI,EJB Webservice,etc..as i am using this in my application to give general message at runtime if any exceptions is generated from the try-catch block.
Waiting for the reply.
Regards:
SK

Hi SK,
There is a general Exception that you can use for all exceptions thrown.
just add this code for any exception you want to catch.
try
// try anything
catch(Exception e)
// catch any exception
Regards,
Marshall.

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Use bridgeTalk with onError event, exception handling

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Hi all,
I found this solution if it can be helpfull for someone.
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Implementing Exception Handling Application Block in custom web parts, event receivers

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Hi,
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http://www.codeproject.com/Articles/26236/Handling-Error-Centrally-in-a-SharePoint-Applicati
Using Microsoft Enterprise Library Application Block in SharePoint
http://www.codeproject.com/Articles/21389/Using-Microsoft-Enterprise-Library-Application-Blo
Exception Handling in SharePoint
http://spmatt.wordpress.com/2012/02/01/exception-handling-in-sharepoint/
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Resume process instance after exception handling with an event subprocess

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Exception event subprocess handling

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I do not understand your response. I have an event subprocess that catches all system and business errors. Then in that process I have a (Start Catch Error)->(user activity) ->??? What do I put as my end event? If I put a message end it is asking for the start message, which I don't have. What I want is when the admin had fixed the error, and they click accept/ok and submit, I want the instance to go back to where the error happened. For example, I have a sales quote process like this: (start)->(user activity)->(service activity)->(user activity)->(end). And for sake of this example my service activity does a database lookup, but the database is down so a system error is generated. So in this case my event subprocess catches the error and the admin fixes the error and submits. How do I get the instance to go back to my service activity. And yes in this simple case a i would have used a boundary event but for the sake of this example assume I have say 50 service activities and I don't want to put a boundary even on each one.
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Exception handling for Scanner console input

I'm trying to add exception handling to a Scanner console to deal with exceptions caused by non-numeric input. My idea was to do use a try/catch in a for loop and break if no exception occurs.
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Here is the code:
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public class Scratch {
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Edited by: jverd on May 2, 2008 1:52 PM

Exception handling in CE Visual Composer 7.1

Hi,
I have modeled a CAF Business Object and a custom Find operation which looks for a custom key. After that, I have exposed that operation as Web service and consumed it in Visual Composer. It is working perfectly as long as the search key exists in the Business Object backend table. When an arbitrart search term e.g. 1234 which does not exist is given, an error message is displayed and the program logic is halted.
Error occured while executing the service: Error in connection: Could not execute Web service, consult your administrator
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Gourav

Exception handling in IDOC using workflows

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Hi Naval Bhatt,
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http://help.sap.com/saphelp_47x200/helpdata/en/04/92725546f311d189470000e829fbbd/frameset.htm
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Objects, Events and Tasks to be Created
http://help.sap.com/saphelp_47x200/helpdata/en/78/2176d251ce11d189570000e829fbbd/frameset.htm
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Events for example:
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Bounded Taskflow Exception Handler not working with Page Fragements

I have one bounded - taskflow task-flow-definition
<?xml version="1.0" encoding="windows-1252" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
<task-flow-definition id="task-flow-definition">
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</task-flow-definition>
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<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<af:commandButton text="commandButton 1" actionListener="#{pageFlowScope.backing_view1.callMyFunction}"
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</jsp:root>view1.java callMyFunction throws an Exception
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<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
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<af:activeOutputText value="Exception Occured"
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</jsp:root>above taskflow is dragged-drop as a Region in one file main.jspx
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
          xmlns:f="http://java.sun.com/jsf/core"
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<jsp:directive.page contentType="text/html;charset=windows-1252"/>
<f:view>
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any ideas?
thanks

Hi,
Pretty much. However, you got the event part wrong, which is mostly my fault here. First, let put down some general JSF facts about event handling.
1. http://java.sun.com/javaee/5/docs/api/javax/faces/component/UIComponent.html#queueEvent(javax.faces.event.FacesEvent)
2. So, basically, queuing an event on a component means queuing it on its parent until you reach the UIViewRoot that will really actually queue it. That strategy allows iterating components to intercept event queued on their children to record the row index as well so that the data model can be synchronized correctly during the broadcast phase (see http://java.sun.com/javaee/5/docs/api/javax/faces/component/UIData.html#queueEvent(javax.faces.event.FacesEvent) and http://java.sun.com/javaee/5/docs/api/javax/faces/component/UIData.html#broadcast(javax.faces.event.FacesEvent))
3. Exceptions that aren't handled by the exception handler are thrown during broadcast or various process* methods.
So, the catch component must leverage these facts to intercept events queued on its children (by overriding queueEvent method) wrapping the original event in a custom on that flag the catch component itself as the source of the event. The result will be that the broadcast method of the catch component will be called to handle the event. The broadcast method must then unwrap the event (to get the original event), gets the original source, then call originalSource.broadcast(originalEvent) within a try-catch block.
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Regards,
~ Simon

Never implemented exception handling in Stored Procedures

I have lots of stand alone stored procedures callled from .NET 20 programs that follow the following pattern. They runn against Oracle 10.2 on Win2003. The only deviiation is a couple where I insert to temptables. I specify a parameter for messages but don't know the best way to implement for Oracle as well as any tips on ODP.NET/oracle interactions error handling.
1. Is it recommended to implement exception handling in With Clauses?
2. If there is an exception in one cursor's SQL, how do I still execute the second?
3. Is it best in some circumstances to pass a null back to client and check for null in program?
From .NET programs I have run into a couple of problems.
4. TNS packet failure.
Anyways any suggestions or experiences are welcome.
CREATE OR REPLACE PROCEDURE   GET_SALES_DATA
                  ,   p_businessdate      in   date
                  ,   p_message         out varchar2
                  ,   p_rcSales             out sys_refcursor
                  ,   p_rInventory            out sys_refcursor
) is
open p_rcSales for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
open p_rcInventory for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
-- CODE NOT IMPLEMENTED
-- exception
-- when TOO_MANY_ROWS then select 'Error handling for future implementations' into p_message from dual ;
-- when NO_DATA_FOUND then select 'Error handling for future implementations. No data' into p_message from dual;
-- when others         then raise_application_error(-20011,'Unknown Exception in GET_SALES_DATA Function');
-- WHEN invalid_business_date then select 'Invalid: Business date is in the current work week.' into p_message from dual ;
END GET_SALES_DATA;Pseudocode'ish because Module level variables and properties have not been defined here for brevity.
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PAge_Load
   GetData
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Public Class DAL
Public Sub GetOracleData()
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                    conn = New OracleConnection
                Catch ex As Exception
                    Throw ex
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                Dim cmd As New OracleCommand
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                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
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                    cmd.Connection = conn
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                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
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                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
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                    HandleError("Exception Retrieving Oracle Data", ex, MethodInfo.GetCurrentMethod.Name, True)
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                    If conn.State = ConnectionState.Open Then
                        conn.Close()
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                dbMessages = cmd.Parameters("p_message").ToString
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            arrStatusMessages.Add("Retrieved Oracle Data Successfully")
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                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
                    cmd.CommandType = CommandType.StoredProcedure
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                oparam = cmd.Parameters.Add("p_businessdate", OracleDbType.Date)
                oparam.Value = BusinessDate.ToString("dd-MMM-yy")
                oparam = cmd.Parameters.Add("p_message", OracleDbType.Varchar2, ParameterDirection.Output)
                             oparam = cmd.Parameters.Add("p_rcSales", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
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                Try
                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
                dim dt as datatable = dsoracledata.tables("sales")
                If IsDataNull(dt) Then
                     _errorType = DBErrorType.NullData
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                If isDataEmpty(dt) Then
                     _errorType = DBErrorType.EmptyData
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                _hasError = False
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                  _ExceptionText = oraEx.Message.ToString
                _errorType = DBErrorType.OracleException
#If DEBUG Then
                Throw oraEx
#End If
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                _ExceptionText = zeroEx.Message.ToString
                _errorType = DBErrorType.DivideByZeroException
#If DEBUG Then
                Throw zeroEx
#End If
            Catch oflowEx As OverflowException
                _ExceptionText = oflowEx.Message.ToString
                _errorType = DBErrorType.OverflowException
#If DEBUG Then
                Throw oflowEx
#End If
            Catch argEx As InsufficientMemoryException
                _ExceptionText = argEx.Message.ToString
                _errorType = DBErrorType.InsufficientMemoryException
#If DEBUG Then
                Throw argEx
#End If
            Catch nomemEx As OutOfMemoryException
                _ExceptionText = nomemEx.Message.ToString
                _errorType = DBErrorType.OutOfMemoryException
#If DEBUG Then
                Throw nomemEx
#End If
            Catch Ex As Exception
                _ExceptionText = Ex.Message.ToString
                _errorType = DBErrorType.GenericException
#If DEBUG Then
                Throw Ex
#End If
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                    conn.Close()
                End If
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       Public Sub ExitClass()
            Return
        End Sub
        ' 'blnWriteNow says when Error is critical and no further processing needs to be done by class, then write to event logs or text files and call exit class
        ' to return control back to webpage. This is my first time trying this way.
        Public Sub HandleError(ByVal friendlyMsg As String, ByVal objEx As Exception, ByVal methodInfo As String, Optional ByVal blnWriteNow As Boolean = False)
            If Not blnWriteNow Then Exit Sub
            Dim strMessages As String
            strMessages = arrStatusMessages
            'Send error email
            If blnSendEmails Then
                 SendMail("[email protected], strMessages. applicationname, " has thrown error. ")
            End If
          'Throw error for   debugging
            If blnThrowErrors Then
                        Throw New Exception(strMessages & vbCrLf & objEx.Message)
            End If
           ' Write to event log and if not available (shared hosting environment), write to text log
            If blnWriteNow Then
                If blnWriteToEvtLog Then
                    If blnCanWriteToEvtLog Then    'Program has write permission to log
                         WriteToEventLog(strMessages, _appname, EventLogEntryType.Error, appname)
                    Else
                        If Not Directory.Exists( appPath & "\log") Then
                            Try
                                Directory.CreateDirectory( appPath & "\log")
                            Catch ex As Exception
                                arrStatusMessages.Add("Cant't write to event log or create a directory")
                            End Try
                        End If
                    End If
                End If
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End Class

I have lots of stand alone stored procedures callled from .NET 20 programs that follow the following pattern. They runn against Oracle 10.2 on Win2003. The only deviiation is a couple where I insert to temptables. I specify a parameter for messages but don't know the best way to implement for Oracle as well as any tips on ODP.NET/oracle interactions error handling.
1. Is it recommended to implement exception handling in With Clauses?
2. If there is an exception in one cursor's SQL, how do I still execute the second?
3. Is it best in some circumstances to pass a null back to client and check for null in program?
From .NET programs I have run into a couple of problems.
4. TNS packet failure.
Anyways any suggestions or experiences are welcome.
CREATE OR REPLACE PROCEDURE   GET_SALES_DATA
                  ,   p_businessdate      in   date
                  ,   p_message         out varchar2
                  ,   p_rcSales             out sys_refcursor
                  ,   p_rInventory            out sys_refcursor
) is
open p_rcSales for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
open p_rcInventory for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
-- CODE NOT IMPLEMENTED
-- exception
-- when TOO_MANY_ROWS then select 'Error handling for future implementations' into p_message from dual ;
-- when NO_DATA_FOUND then select 'Error handling for future implementations. No data' into p_message from dual;
-- when others         then raise_application_error(-20011,'Unknown Exception in GET_SALES_DATA Function');
-- WHEN invalid_business_date then select 'Invalid: Business date is in the current work week.' into p_message from dual ;
END GET_SALES_DATA;Pseudocode'ish because Module level variables and properties have not been defined here for brevity.
Public Class WebPage1
PAge_Load
   GetData
End Class Data Access Layer
Public Class DAL
Public Sub GetOracleData()
            Dim conn As OracleConnection
                Try
                    conn = New OracleConnection
                Catch ex As Exception
                    Throw ex
                End Try
                Dim cmd As New OracleCommand
                With cmd
                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.Connection = conn
                End With
                cmd.Connection = conn
                Dim oparam As OracleParameter
                oparam = cmd.Parameters.Add("p_businessdate", OracleDbType.Date)
                oparam.Value = BusinessDate.ToString("dd-MMM-yy")
                oparam = cmd.Parameters.Add("p_message", OracleDbType.Varchar2, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rc_inven_csv", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcSales", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
                Dim Adapter As New OracleDataAdapter(cmd)
                Try
                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
                Catch ex As OracleException
                    HandleError("Exception Retrieving Oracle Data", ex, MethodInfo.GetCurrentMethod.Name, True)
                 Finally
                    If conn.State = ConnectionState.Open Then
                        conn.Close()
                    End If
                End Try
                dbMessages = cmd.Parameters("p_message").ToString
            End If
            arrStatusMessages.Add("Retrieved Oracle Data Successfully")
        End Sub
       ' Original Implementation ; No longer used
        Public function GetOracleData
           Dim conn As New OracleConnection
            conn.ConnectionString = dbconn.Connectionstring
             Dim cmd As New OracleCommand
                With cmd
                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.Connection = conn
                End With
                cmd.Connection = conn
                Dim oparam As OracleParameter
                oparam = cmd.Parameters.Add("p_businessdate", OracleDbType.Date)
                oparam.Value = BusinessDate.ToString("dd-MMM-yy")
                oparam = cmd.Parameters.Add("p_message", OracleDbType.Varchar2, ParameterDirection.Output)
                             oparam = cmd.Parameters.Add("p_rcSales", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
                Dim Adapter As New OracleDataAdapter(cmd)
                Try
                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
                dim dt as datatable = dsoracledata.tables("sales")
                If IsDataNull(dt) Then
                     _errorType = DBErrorType.NullData
                End If
                If isDataEmpty(dt) Then
                     _errorType = DBErrorType.EmptyData
                End If
                _hasError = False
            Catch oraEx As OracleException
                  _ExceptionText = oraEx.Message.ToString
                _errorType = DBErrorType.OracleException
#If DEBUG Then
                Throw oraEx
#End If
            Catch zeroEx As DivideByZeroException
                _ExceptionText = zeroEx.Message.ToString
                _errorType = DBErrorType.DivideByZeroException
#If DEBUG Then
                Throw zeroEx
#End If
            Catch oflowEx As OverflowException
                _ExceptionText = oflowEx.Message.ToString
                _errorType = DBErrorType.OverflowException
#If DEBUG Then
                Throw oflowEx
#End If
            Catch argEx As InsufficientMemoryException
                _ExceptionText = argEx.Message.ToString
                _errorType = DBErrorType.InsufficientMemoryException
#If DEBUG Then
                Throw argEx
#End If
            Catch nomemEx As OutOfMemoryException
                _ExceptionText = nomemEx.Message.ToString
                _errorType = DBErrorType.OutOfMemoryException
#If DEBUG Then
                Throw nomemEx
#End If
            Catch Ex As Exception
                _ExceptionText = Ex.Message.ToString
                _errorType = DBErrorType.GenericException
#If DEBUG Then
                Throw Ex
#End If
            Finally
                If conn.State = ConnectionState.Open Then
                    conn.Close()
                End If
            End Try
End class Error Class
Public Class Errors
       Public Sub ExitClass()
            Return
        End Sub
        ' 'blnWriteNow says when Error is critical and no further processing needs to be done by class, then write to event logs or text files and call exit class
        ' to return control back to webpage. This is my first time trying this way.
        Public Sub HandleError(ByVal friendlyMsg As String, ByVal objEx As Exception, ByVal methodInfo As String, Optional ByVal blnWriteNow As Boolean = False)
            If Not blnWriteNow Then Exit Sub
            Dim strMessages As String
            strMessages = arrStatusMessages
            'Send error email
            If blnSendEmails Then
                 SendMail("[email protected], strMessages. applicationname, " has thrown error. ")
            End If
          'Throw error for   debugging
            If blnThrowErrors Then
                        Throw New Exception(strMessages & vbCrLf & objEx.Message)
            End If
           ' Write to event log and if not available (shared hosting environment), write to text log
            If blnWriteNow Then
                If blnWriteToEvtLog Then
                    If blnCanWriteToEvtLog Then    'Program has write permission to log
                         WriteToEventLog(strMessages, _appname, EventLogEntryType.Error, appname)
                    Else
                        If Not Directory.Exists( appPath & "\log") Then
                            Try
                                Directory.CreateDirectory( appPath & "\log")
                            Catch ex As Exception
                                arrStatusMessages.Add("Cant't write to event log or create a directory")
                            End Try
                        End If
                    End If
                End If
            End If
        End Sub
End Class

General Exception Handling

Hello. In my applications I usually have a try catch(Throwable) block surrounding all the top code (the code in main()) to log and report errors and exceptions that is not caught anywhere else, and to have my application exit in a controlled way. But I recently noticed that exceptions thrown in event handling (i.e. java.awt.EventDispatchThread.run) are not caught by the try catch block in main().
Are there any easy way to catch everything so my app can exit in a controlled way?
If this is not possible which exceptions are not propagated to main()? I would guess that it's exceptions thrown in other threads, is this correct? If so, do I have to surround all event handling by try catch(Throwable) to be safe?
I would like more information and guidelines about exception handling. Any book recommendations?
Help appreciated, thanks!

You should never let exceptions propagate outside your event handling methods.
If you don't follow that rule, the java.awt.EventDispatchThread.run() method terminates and the Java Virtual Machine tries to print the stack trace to the terminal window (if there is one) and then exits, but not through your main() method.
So, try /catch all Exceptions inside your event handler methods:
// inside event handler method
try {
    // handle event here
   } catch (Throwable t) {
     // handle errors and recover from errors here
     // and either log error or if important display message to the user.
   }There is no easy-lazy way to do exception handling by only having the try/catch block in main in this case.
Note : If any of the listeners throws an exception none of the following listeners is called. Since there is no guarantee of the order in which listeners are called you cannot be sure which ones are called first.

Exception Handling & Error Recovery

Does the Pre8 Development Team plan to release a version that can recover from exceptions & retry problematic clips on long movie builds?
Many hours spent multiple times to find an unrecoverable error has terminated a movie build is getting to me - not to mention unexpected crashes.
It would seem the process could be setting recovery points to go back to in the event of an exception so happily conformed and rendered parts do not have to be continually rebuilt. The exception handling could be hierarchical, with local level retries a number of times, then if that fails, going back to a well defined restart point. Even media reloads could be accommodated, happily conformed clips could be cached, and even spare copies put aside.
The number of unspecified errors indicates that not a great deal of care has gone into the exception hadling scheme to date.
More meaningful messages might help users - for example, say a particular clip took many gos to fully conform, it is likely quite flakey and then the advice might be that it should be reloaded or even remade...
The dumps after crashes clearly do not yet include the stack of recent actions that are used to undo things - maybe they should.
The name of a media clip in hand, what the latest action is aiming to do with it (say add a particular effect), should all be reported in plain text and also sent in the dump. A message could be canned, just in case, at the commencement of each and every action at the point when the logic can construe what that action is to be exactly.
I am also not confifent that interrupts and premptions are carefully managed... too often asyncronous events and system requests coincide with a crash. Think McAfee, Norton, etc.
Just some suggestions, but the product is almost unusable as it stands other than for raising the blood pressure of countless hapless users.
AdelaidePeter

As this is a user-to-user forum, none of us is in a position to know what plans might be in the works.
You might want to file a Feature Request with Adobe. They take these seriously.
Good luck,
Hunt

RE: exception handling

Wayne,
When an exception occurs, Forte aborts the inner
most compound statement, after executing the code
of an exception handler if there is one. If the excep-
tion is not handled, it still exists after the compound
statement was aborted, so Forte now aborts the
remaining inner most compound statement. This
continues until Forte reaches the root compound
statement of the tread (or "task" if you will). This
one will also be aborted and that is the end of the
thread (task). If you look at the debugger, you will
see "RIP" in front of this thread. Sure, this thread
was spawned by another thread. It was started
by a "start task" call from within some compound
statement in the parent thread, but this compound
statement was probably long since closed. Forte
can't pass the exception on to a higher level com-
pound statement, because there is none. If the
thread started with a method that had a return event
and an exception event, and you started the task
with "Completion = event" then Forte will post one
of these events after the root compound statement
was finished (in other words, the thread was stopped).
From this event you can see, if the thread wasfinished succesfully or not.
Of course, an event is not the same kind of thing
as an exception. You can't raise events, or post
exceptions.
So, when an exception is not handled, only the thread
where this exception occured is cancelled (including
all it's child threads). The rest of the treads stay alive.
-----Original Message-----
From: Wayne Walker [SMTP:[email protected]]
Sent: Wednesday 22 July 1998 13:49
To: '[email protected]'
Subject: exception handling
I have a problem in handling exceptions detected in a task. I start a
task
which performs some function. I also have an event handler which
recognizes the method_exception returned should an exception be
detected.
Once detected by the event handler I force the exception up to
another
process which displays the exception to the user. However, it appears
that
forte is intercepting the exception before my event handler can detect
it
and posts an exception message. Can anyone explain how this mechanism
works and the best approach for handling exceptions myself vice Forte?
Thanks,
Wayne
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My understanding is that if your client doesn't care (or cannot handle) the exception,
you throw your exception WRARPPED with EJBException. This way, the container can
roll back the transaction properly.
If your client cares (or have the ability to recover) the exception, you should
define your own exception. They should not be derived from RuntimeException or
RemoteException or EJBException. If you want to make sure that the transactions
are rolled back, you call setRollbackOnly() before you throw the exception.
Charles
soraya abbasi <[email protected]> wrote:
I have tried to make my custom exception subclass RemoteException but
that doesn't work.
Does that mean to say you can't have custom exceptions thrown to a client?

Generic Exception handler in java

We have developed a client java application with our own exception hierarchy derived from java.lang.exception. We raise our own exception in case of error scenarios. But there is one additional thing which we want to do:
1. When ever any exception is raised in our exception we want to do some generic exception handling (like kicking of some module which collects the log files and send it to the administrator.
2. We want the above activity to happen also when any runtime exception is raised. We are not catching any runtime exception and we have no handle for this.
How should we go about this. Can we write a very low-level generic exception handler?
We do not want to have done at every catch block we have in our code. I mean we want to have some hook at a very generic place.
Let me know if some body can be help me on this.

As far as I know, for exceptions that are caught, you must make a call to a generic handler in the catch block, or you may rethrow the exception as a RuntimeException, and let it propagate.
For RuntimeExceptions and Errors in threads that you create, the easiest way to solve this is to subclass ThreadGroup, override uncaughtException with the appropriate code, and create all your threads in this group. For a thread like main, have the first thing in the thread be the creation of a new thread in the new group, then pass control to that thread. For fixed threads, like the event queue, someone had a suggestion already. Note that uncaughtException is only called just before the thread ends, so an exception that shouldn't end the thread should be handled seperately.

JRE7: Exception Handler no longer works

Hello Folks,
in a large-scale Swing App (usually started via JWS) we used to define a global event handler by setting the "sun.awt.exception.handler" environment variable. This used to work under JRE6, but it doesn't work under JRE7 anymore. What is the replacement?
Regards from Germany,
Thomas Nagel

http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Thread.UncaughtExceptionHandler.html
?

Generalised Event Exception Handler

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