Exception handling framework?

Can anyone recommend an exception handling framework or perhaps pattern for Applets?
Thanks, Tom.

Methinks you're gonna be stuck. Unless every catch block already happens to call some central method (or small set of methods) and passes in the exception, there is no way I can think of to "flip a switch" and magically have all your catch blocks start logging messages when they weren't before. You'll probably have to change the code every place you want to log something. This is why it's a great idea to think of those sorts of things before coding a huge application. :-) I'm not criticizing you since it sounds like you inherited this.

Similar Messages

Exception handling in ODI - common exception handling framework

Hi,
I need to come up with a common exception handling framework in an environment where ESB and ODI are being used for interfacing and ELT operations. I am of the opinion that
1. I am not able to find any documentation wrt exception handling when ODI is used? Can some one help me with some pointers?
2, When I come up with a common exception handling framework using BPEL, will I be able to invoke the same from ODI.
Thanks,
Mahesh

Thanks for the reply Allan. I haven't used BusinessWorks.
I did go through this thread before and here's my understanding.
1. ESB provides the ability of error handling (client management API) but not the exception handling i.e. I can't redirect the flow in case there is an exception in my primary flow. Am I right with my understanding?
2. Error handling ability of ESB is limited to retryable exceptions viz-a-viz asynchrounous ESB processes (e.g. database listener not up) where in the process can be retried. Am I right here?
Thanks,
Mahesh

Exception handling - Common exception handling framework

Hi,
I need to come up with a common exception handling framework in an environment where ESB and ODI are being used for interfacing and ELT operations. I am of the opinion that
1. A generic exception handling framework can be built using BPEL and can be invoked from ESB. Is my understanding correct?
2. Are there any ways that we can build this framework using ESB itself? I opinion that it's not possible as there is no concept of try-catch?
3. I am not able to find any documentation wrt exception handling when ODI is used? Can some one help me with some pointers?
4, When I come up with a common exception handling framework, will I be able to invoke the same from ODI.
Thanks,
Mahesh

Thanks for the reply Allan. I haven't used BusinessWorks.
I did go through this thread before and here's my understanding.
1. ESB provides the ability of error handling (client management API) but not the exception handling i.e. I can't redirect the flow in case there is an exception in my primary flow. Am I right with my understanding?
2. Error handling ability of ESB is limited to retryable exceptions viz-a-viz asynchrounous ESB processes (e.g. database listener not up) where in the process can be retried. Am I right here?
Thanks,
Mahesh

Java Exception handling framework

Please suggest some frameworks for Java Exception handling

http://java.sun.com/docs/books/tutorial/essential/exceptions/
http://forum.java.sun.com/thread.jsp?forum=31&thread=173005
http://www.tfh-berlin.de/~knabe/java/multex/
http://www.impetus.com/comp_jeh.htm
http://www.softwaresummit.com/1998/1998/speakers/haggar.htm

Provider Hosted App - Exception Handling and Logging

Hello,
I would like to use file system to log the exceptions (The IIS server in which the APP is configured) for Provider Hosted App - Could anyone share some blogs/links related to that?
Thanks in advance,

Well the first time, I asked the question, I think I
was not so clear. Please let me explain this in
detail. I am not architect, so correct me if I am
wrong.
I want to use log4J but definitely want to avoid using
them directly in our package, idea is to create
wrappers around all the external API, jar we are
using. At logging side I feel little comfortable.
But having little difficulty in thinking and designing
about Exception handling framework.
1. My aim is to create a general framework in 3 broad
categories (For Presentation tier, For Business tier,
for Data Access tier)
2. For each tier if you import those already created
framework classes, all developers should be just able
to use the methods of exception framework and use them
in catch block and throw them.
Example:- I would like to create a class called
MyProjectExceptionDecider, which will decide the type
of exception in Business Tier and then use my
MyProjectExceptionErrorParser, which reads the XML
document and gets a related message number and error
message.
This MyProjectExceptionErrorParser then passes the
right exception to MyProjectExceptionDisplayer which
will display the exception with right message and
message number.
And something more like this. I am not yet getting
complete picture.
3. So, if you have done something similar and if you
have the class diagram and sequence diagram for such
exception handling, I would be grateful if you are
willing to share with me.
Please let me know, if you have different ideas. I
request you all to participate and throw your ideas
and suggestions.
Srikanthgenerally, wheather or not you are using log4j or anything else, when designing exception handling mechnism, you need to decide on where or by whom an exception will be handled, and if the exception needs to be displyed, and how it is displayed.

What King of exception handling is done in OA framework code?

Hi All,
I am not a core java person but have to do some OA framework code changes.Wanted to know what kind of exception handling is done in OAF codes?
I was looking as the seeded oracle controllers and dont see any try catch blocks.
can anyone guide me?

OAF java based framework, hence exception handling is similar to how its done in core java. I would advuce to better go through exception handling concepts of core java.
--Mukul

Exception Handling in Stripes framework

Pls help me to setup the Exception handling...
1.how to catch the exception occuring in ActionBean method,using our custom
exception handle method?
not sure to integrate this both?
http://stripesframework.org/display/stripes/Exception+Handling
becas in the example it shows only the MyExceptionHandler class ...how it is
linked to the method in the ActionBean
Thanks
Kris

The same answer as in: http://forum.java.sun.com/thread.jspa?threadID=5264689

Java Exception Handling

Hello everyone,
I'm searching for a design pattern / framework to manage exception handling. I'm currently working on a distributed document management system for PC / AS/400, which consists of Commandline clients, a Socket Server and a windows NT daemon in java, which accepts network requests from the Socket Server. Communication is done via serialized Objects.
My Problem is, that exceptions can be thrown either on the server or on the client side and have to be transferred to the user. Error Messages should be read from the database. Exception handling should prefferably take place in a central piece of code, such as the two endpoints of network connections, the SocketServer as service under win32 and another SocketServer as Application on another box, currently with UNIX OS.
thanks in advance for any answers
regards

You should look into Bridge [GOF:151] and Memento [GOF:273].
Bridge allows you to decouple your mechanism from the implementation memento on how to propergate the decoupled exception information.

Exception Handling in bounded taskflows - expected behaviour

Hi,
I'm currently reviewing exception handling in bounded task flows and some things does not seems to be very clear for me.
(q1) Does it make sense that a bounded task flow calls a method (via a method activity) defined on the page definition of another page (outside of the BTF) by using a #{data.xxxmyPageDef.myMethodName.execute} EL expression?
(q2) Is is correct to expect the application to execute the method marked as ExceptionHandler in the taskflow, whenever an exception occurs?
(q3) I created 5 different scenarios where I call a service method which throws an exception, from within a page fragment of the BTF.
(q3 – sc1) Call a service method through the binding layer of the current page (by using #{bindings.xxx.execute})
Result: A dialog containing the exception message appears.
This is what I expected. Althought, the exception handler method does not seems to be invoked.(q3 – sc2) Call a service method through a task flow method activity using #{bindings.xxx.execute}
Result: A dialog containing the exception message appears.
This is what I expected. Althought, the exception handler method does not seems to be invoked.(q3 – sc3) Call a service method through a task flow method activity using #{data.myPageFragementPagedef.xxx.execute} (accessing the pageDef of the page fragment)
Result: Nothing happens.
This is not what I expected. Although, the exception handler method does nog seems to be invoked, I expect the ADF Error Handler to create a FacesMessage.(q3 – sc4) Call a service method through a task flow method activity using #{data.myPageContainingThePageFragmentPageDef.xxx.execute} (accessing the page containing the BTF region)
Result: Nothing happens.
This is not what I expected. Although, the exception handler method does nog seems to be invoked, I expect the ADF Error Handler to create a FacesMessage. (q3 – sc5) Call a service method through a task flow method activity using #{data.aPageOutsideTheBTFPageDef.xxx.execute} (accessing a page outside the BTW)
Result: Nothing happens.
This is not what I expected. Although, the exception handler method does nog seems to be invoked, I expect the ADF Error Handler to create a FacesMessage. (q4) How can it be possible that – without an exception handler – exceptions occur when calling method activities, without the exceptions being translated to FacesMessages?
Thanks in advance,
Koen Verhulst
JDeveloper 11.1.1.4

Koen,
+(q1) Does it make sense that a bounded task flow calls a method (via a method activity) defined on the page definition of another page (outside of the BTF) by using a #{data.xxxmyPageDef.myMethodName.execute} EL expression?+
No. Exceptions should be handled locally.
+(q2) Is is correct to expect the application to execute the method marked as ExceptionHandler in the taskflow, whenever an exception occurs?+
Only for exceptions that are before Render Response. The Render Response Phase is not handled in ADFc. So exceptions that occur in managed beans may fall through
+(q3) I created 5 different scenarios where I call a service method which throws an exception, from within a page fragment of the BTF.+
+(q3 – sc1) Call a service method through the binding layer of the current page (by using #{bindings.xxx.execute}) Result: A dialog containing the exception message appears.+
This is what I expected. Althought, the exception handler method does not seems to be invoked.
The binding layer has an error handler you can override in the DataBinings.cpx file
+(q3 – sc2) Call a service method through a task flow method activity using #{bindings.xxx.execute}+
Result: A dialog containing the exception message appears.
This is what I expected. Althought, the exception handler method does not seems to be invoked.
Again, you use the binding layer to invoke the service
+(q3 – sc3) Call a service method through a task flow method activity using #{data.myPageFragementPagedef.xxx.execute} (accessing the pageDef of the page fragment)+
Result: Nothing happens.
This is not what I expected. Although, the exception handler method does nog seems to be invoked, I expect the ADF Error Handler to create a FacesMessage.
Never use such a call. Its bad practice as there is no guarantee the container you reference is active. Always have the method call activity have its own binding defined when accessing a method call activity. I know there are lots of example floating aroundthat you #{data ...} and many are from 10.1.3. This should be avoided alltogether though
+(q3 – sc4) Call a service method through a task flow method activity using #{data.myPageContainingThePageFragmentPageDef.xxx.execute} (accessing the page containing the BTF region)+
Result: Nothing happens.
This is not what I expected. Although, the exception handler method does not seems to be invoked, I expect the ADF Error Handler to create a FacesMessage.
Again, this is not a proper use of the ADF framework.
+(q3 – sc5) Call a service method through a task flow method activity using #{data.aPageOutsideTheBTFPageDef.xxx.execute} (accessing a page outside the BTW)+
Result: Nothing happens. This is not what I expected. Although, the exception handler method does nog seems to be invoked, I expect the ADF Error Handler to create a FacesMessage.
accessing a page outside the BTW (!!!) This should ring a worst practices alarm on your laptop (obviously doesn't do it either)
+(q4) How can it be possible that – without an exception handler – exceptions occur when calling method activities, without the exceptions being translated to FacesMessages?+
Exceptions are not handled in a single place but stacked. The business service raises an exception and passes it to the binding layer if not handled. The binding layer handles the exception and if it can't passes it to ADFc. ADFc can handle this exception if it is not during Render Response.
Bottom line: There is no single point of exception handling. So as a recommendation for best practices
- Catch and handle exceptions as close as possible to their origins
- If things can go wrong, thy will - use try/catch blocks in managed beans
- Use an exception handling activity in all bounded task flows. In the case of task flow call activities being used exceptions can bubble up to the caller. However, this would take users out of their current application context
- Exceptions not handled in ADFc can be intercepted by overriding the application task flow exception handler (used by the exception handler activities). This would give you a chance e.g. to handle issues during Render Response
- Never fight the framework, never bend the framework: Don't use out of scope access to page definitions and resources. Exception handling is not a replacement for bad code practices (sorry for saying this, its not meant to be rude) :-)
Though I don't have a qualified numbers of bugs open for exception handling in ADF between 11.1.1.4 and now (and some that are open), but there are issues reported in this area. If there is something that really feels wrong, please go ahead and file a bug and provide a test case for development to have a look. The Render Response issue, for example is something we are aware of and that is in discussion (afaik knows, there is a change in exception handling in JSF 2 that may have an impact to what we can do in ADFc).
thanks
Frank

Exception Handling In BPEL By using Catch Blocks or Fault Policies Or Both

I have a confusion regarding
Exception handling :
When Should i go for 1)Catch Block (Remote , or binding ) in bpel for exception handling .
2)Fault Policy , Fault binding.xml
Currently iam using catch blocks , but even fault policy is good , but can i use both...
Currently in My bpel ,when any error occurs i have to send a error notification by Email .
Currently i have exposed the email service which shuts emails and write a file with errored Message.
Hence if any error i will catch i in a parent BPEL, i will just invoke the above email, service .
So anybody can help me by giving the suggestion how to go for the best approach
Edited by: anantwag on Mar 23, 2011 6:31 AM

Currently in My bpel ,when any error occurs i have to send a error notification by Email .
Currently i have exposed the email service which shuts emails and write a file with errored Message.Seeing your use case I will suggest you to use fault handling framework (fault policy). Fault handling framework should be used where you need generic error handling framework which handles all the faults occured in any composite component. Generally BPEL catch block should be used to propagate error info/fault back to the client/to fault handling framework or to consume an error
Regards,
Anuj

Exception Handling in Web Center for UI related Errors not working.

Hi Guys,
I have implemented Error Handling in ADF Application with Custom Model Exception Handler ( which is "CustomExceptionHandler extends DCErrorHandlerImpl") to catch all Model Layer Exception and to customize those error messages.
I have implemented Error Handling in ADF Application with Custom View Exception Handler ( which is "CustomViewErrorHandler extends oracle.adf.view.rich.context.ExceptionHandler";) to catch all View Layer Exception and to customize those error messages.
The design for this is , in Model Custom Exception Handler i find the exception message in "public String getDisplayMessage(BindingContext bindingContext,Exception exception) " method and throw RuntimeException to pass this exception to Custom View Layer Exception , so that i can handle all the exception @ View Layer it self .
In the View Layer Exception Handler i am navigating to specific error page using
String contextPath = ((HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getContextPath();
ExternalContext ectx = facesContext.getExternalContext();
ectx.redirect.
All these things absolutly working in ADF Application for all the exception ( Model , View ) and i am successfully navigating to error page.
Problem :
When i implement the same thing in Webcenter Application ( Model Custom Exception Handler and View Custom Exception Handler), Model Part is working as expected , but View Custom Exception Handler is not all calling .
i am assuming that ,this View Custom Exception Handler (CustomViewErrorHandler extends oracle.adf.view.rich.context.ExceptionHandler) works only for JSF Life cycle
"Allows frameworks to intercept otherwise unhandled exceptions thrown during the JSF lifecycle. ExceptionHandlers can be registered by adding a service file with a class name at META-INF/services/oracle.adf.view.rich.context.ExceptionHandler." from http://jdevadf.oracle.com/adf-richclient-demo/docs/apidocs/oracle/adf/view/rich/context/ExceptionHandler.html";
As Webcenter Portal uses ADF Life Cycle this Exception Handler is not calling , i am not sure.
if any one has any idea please let me know .
Thanks
Annapareddy Srinivasrao
Edited by: Srinivasrao Annapareddy on May 22, 2013 12:06 PM

i used runtime exception along with the wdwsmodel exception

Exception Handling in Message Mapping and Alert

Hello,
1. Pls let me know the concept of Exception Handling and Alerts.
2. Pls provide some blogs for Exception Handling in Message Mapping.
3.What are Alerts and how it help us in XI. Pls provide some blogs for Alert
4.How are Alerts and Exception Handling can be related say for some scenario
Regards

Hi,
Plz check out these blogs of Sravya on Error Handling:
/people/sravya.talanki2/blog/2006/11/22/error-handling-framework-xiout-of-the-box-episode-1
/people/sravya.talanki2/blog/2006/11/23/error-handling-framework-xiout-of-the-box-episode-2
Also check this SAP Presentation:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/9418d690-0201-0010-85bb-e9b2c1af895b
/people/alessandro.guarneri/blog/2006/01/26/throwing-smart-exceptions-in-xi-graphical-mapping
Error Handling :
http://help.sap.com/saphelp_nw04/helpdata/en/56/b46c3c8bb3d73ee10000000a114084/frameset.htm
Alerts:
/people/michal.krawczyk2/blog/2005/09/09/xi-alerts--troubleshooting-guide
/people/michal.krawczyk2/blog/2005/09/09/xi-alerts--step-by-step
http://help.sap.com/saphelp_nw04/helpdata/en/56/d5b54020c6792ae10000000a155106/content.htm
BPM:
/people/arpit.seth/blog/2005/06/27/rfc-scenario-using-bpm--starter-kit
Working with acknowledgements
regards

Exception Handling in BPEL

Guys,
I have exposed the following class as Web-Service, using Axis.
public class ExceptionCreator {
public ExceptionCreator(){
public ReturnObject generate(boolean flag) throws CustomException{
if(flag){
throw new CustomException("This is a custom exception");
}else{
return new ReturnObject(1,"NO EXCEPTION");
where ReturnObject is a simple JavaClass with two member variables id & name and CustomException is a class extended from Exception superclass in Java.
Using axis, writing appropriate serializers in wsdd, I created a web-service out of this and imported the WSDL from Axis as a Partner Link in BPEL.
If I pass true as Input and if I specify "{http://schemas.oracle.com/bpel/extension}remoteFault as faultName in the catch, the exception does get caught. However, I am unable to access the details of the same which looks like below:
[2005/09/26 18:44:11] "{http://schemas.oracle.com/bpel/extension}remoteFault" has been thrown.
<remoteFault xmlns="http://schemas.oracle.com/bpel/extension">
<part name="code">
<code>Server.userException</code>
</part>
<part name="summary">
<summary>when invoking endpointAddress 'http://kingfisher:9080/axis/services/ExceptionCreatorSewrvice', com.misys.equationcore.tutorials.CustomException: This is a custom exception</summary>
</part>
<part name="detail">
<detail>AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException faultSubcode: faultString: com.misys.equationcore.tutorials.CustomException: This is a custom exception faultActor: faultNode: faultDetail: {http://kingfisher:9080/axis/services/ExceptionCreatorSewrvice}fault:<exceptionMessage type="soapenc:string">String CustomException Constructor</exceptionMessage> {http://xml.apache.org/axis/}hostname:kingfisher</detail>
</part>
</remoteFault>
I am trying to access the contents of this fault in a Assign activity where I want to display the actual java exception as output.
Any clues as to how I can access the same?
Thanks in advance,
~Soumen.

Currently in My bpel ,when any error occurs i have to send a error notification by Email .
Currently i have exposed the email service which shuts emails and write a file with errored Message.Seeing your use case I will suggest you to use fault handling framework (fault policy). Fault handling framework should be used where you need generic error handling framework which handles all the faults occured in any composite component. Generally BPEL catch block should be used to propagate error info/fault back to the client/to fault handling framework or to consume an error
Regards,
Anuj

Extend BizTalk ESB Exception Handling to manage exception for all organization wide application exception

Hello,
Can we Extend BizTalk ESB Exception Handling to manage exception for all organization wide application ( both biztalk and external) exception ?
Is it something a good option or there are better approach to do this.
Business requirement is Exception management should be single window for complete end-to end application ( source-Biztalk - destination)
Tarun
Tarun

Hi Tarun,
ESB Toolkit framework for exception handling is not complete OOTB. it is intended as a framework and set of patterns that can and should
be extended based on the customer’s needs.
One way of extending the capabilities is by using Standardized Exception Management or SEM in short.
SEM solution extends the capabilities of the Microsoft ESB Exception Management Framework and follows a design pattern that provides a flexible
approach to exception monitoring and enables error responses to originate from outside of the solution. While SEM is primarily targeted to Microsoft BizTalk Server applications, it can also be leveraged by other applications that are able to call a Windows
Communications Foundation (WCF) or web service.
Refer: Standardized Exception Management
Standardized Exception Management (SEM)
Rachit

What are the best practices for exception handling in n-tier applications?

What are the best practices for exception handling in n-tier applications?
The application is a fat client based on MVVM pattern with .NET framework.

What are the best practices for exception handling in n-tier applications?
The application is a fat client based on MVVM pattern with
.NET framework.
That would be to catch all exceptions at a single point in the n-tier solution, log it and create user friendly messages displayed to the user.

Exception handling framework?

Similar Messages

Maybe you are looking for