Comments on: Meaningful exceptions in LCDS/BlazeDS applications using Spring BlazeDS Integration

By: Anuj

Anuj — Tue, 31 Aug 2010 12:09:30 +0000

Hey, I would be interested in the extension
Can you email me back with details.

Cheers
Anuj

By: margelatu

margelatu — Wed, 17 Feb 2010 20:15:12 +0000

I’ve used Spring BlazeDS Integration with LCDS, but not out of the box. Due to its current lack of support for LCDS, I’ve had to write a small extension for Spring-Flex which makes it possible to use LCDS and also expose data management assemblers via annotations.
If you’re interested in this, give me an e-mail.

By: newtospring&flex

newtospring&flex — Wed, 17 Feb 2010 13:22:45 +0000

Hi,
We have our application in Spring and LCDS. Now we have to use MessageInterceptor for which SpringBlazeDS integration should be implmented. Can we use SpringBlazeDS integration with LCDS, because we get lot of errors which says ‘cannot make instance of _messageBorkerHandlerMapping’?

By: margelatu

margelatu — Fri, 11 Dec 2009 16:32:33 +0000

I usually let the client applications worry about user messages and localization. I pass them an error code and let them handle it as they see fit. There’s no universally good approach. Both approaches are good, like you said it all depends on the context.

By: Ingo

Ingo — Fri, 11 Dec 2009 12:36:35 +0000

Hi,
normally I’m used to let client’s be as dumb as I could. If I can handle something in the backend, e.g. localized error messages, I do it there and let the client only read the string via getMessage. But if you have more than one ways to query with a client, like Rest, remote or webservice, it is more likely to have a error code set and let the client decide what to do with the error (just show or fetch internally something else).

So, it depends

By: margelatu

margelatu — Thu, 10 Dec 2009 18:01:07 +0000

The ExceptionCode is just a custom enum that I created, containing error codes which are relevant to the Flex client application. When the client application makes a remote call and the remoting service throws an exception, the client application can read the code of the exception and determine the action to take based on the code.

Does it make sense ?

By: Ingo

Ingo — Thu, 10 Dec 2009 16:38:42 +0000

Hi, thanks for that article.
I’m currently wondering where the ExceptionCode class is coming from. You do not use import statements, so I’m struggling where to get those classes from. Is it a spring framework flex class or something implemented on your own?

–
exception.setCode(ExceptionCode.SYSTEM.name());
–

Regards
Ingo

By: margelatu

margelatu — Fri, 14 Aug 2009 15:49:43 +0000

Yes it’s much easier, I think it brings a needed separation between your business exceptions and the exceptions you expose publicly.

By: Mario

Mario — Tue, 04 Aug 2009 07:21:52 +0000

Very useful, thanks for that!
In former projects (with plain blazeDS) we used AspectJ to do the similar thing, but this is much easier…

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