how can I write exception handling in my application. I am using restler framework
RestException is handled by Restler framework to send a error response to the api user. Other than that Exception handling in restler is the usual PHP way
Best way to handle exceptions is to use try catch block where you expect them
You can detect un-handled exceptions and handle them using set_exception_handler(). Ideally you can do that at the index.php (gateway)
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i am currently trying to understand the exception handling in JHipster.
I want to throw an exception in a service. The exception message shall be translated in the UI and parameters shall be set for the message. The CustomParameterizedException would fit perfectly. But from an architectural perspective, i think i can't use it in a service, as the exception is located in the web package. Why is it located in the web package? I would expect it to be in an own package exception or similar, so it can be accessed from every layer in the application.
I've also seen in the ExceptionTranslator.processRuntimeException method, that any RuntimeException can be handled, if the ResponseStatus annotation is set on the Exception. As far as i can see, the translation in the UI will only be done based on the error code. So i cannot use it for custom error messages, that i need.
How do you do the exception handling in other layers than the web layer in a jHipster application?
Thanks for your help in advance!
CustomParameterizedException is in a web package because it uses ParameterizedErrorVM which is a view model which gets serialized in JSON and used by Angular part of your app. This is generated code, feel free to change it to fit your needs.
Spring MVC offers several ways to handle exceptions as shown in this blog post.
You could also uses AOP to implement a default processing like logging or translating exceptions, see LoggingAspect in your JHipster app.
I want to implement RPC over RabbitMQ. Consumer can produce exceptions. How the consumer should return these exceptions? Is there any header I could use to tag the result as an exception?
In particular, I am using it in the rabbitmq-native plugin for grails 3.0.9.
I'am using Mule 3.3.0 CE and I would have a custom behaviour when an exception is thrown in an http outbound endpoint (i.e when I get a Connection Refused Exception or Connection Timeout Exception). Let's assume that I have this scenario: a SOAP Component and a Http Outbound Endpoint that realize together a cxf service client and let's assume that I can't use any exception strategy.
I would write an Interceptor which intercept the http exception (i.e Connection Refused) and in which I can write a custon behaviour (i.e send the message in a queue).
I need of an interceptor that intercept che http exception and no a SOAP Fault (that could be intercepted with a SOAPFaultInterceptor).
How can I realize this model?
Thank you all for any help
I found the solution. I used a custom interceptor ( component) just before the Http component and I extended the AbstractEnvelopeInterceptor that gives to me the possibility to work before, after and during the component is processing the message.
With this perspective, I implemented the last method. This method's sign contains a boolean value that is setted is an exception occurred. In this way I can leverage this method to handle any kind of exceptions that is related to Http Component.
I'm using BlazeDS to connect my Flex front end to my Java backend, and was wondering if there is any way I can get the complete stack trace in case of an exception to be passed to the front end. When I set a break point in the exception handler in Flex, I just see a basic message, fault string etc.
Would appreciate any help.
Thanks!
You could create a custom exception; then catch all serverside exceptions at highest level and rethrow your custom exception with the stacktrace of the original exception as a property. You should be able to access this clientside.
Also, if you're using Spring on the server side, the Spring BlazeDS integration can translate server-side exceptions into cleaner client-side ones using exception translators.
When I read a message with a WSO2 ESB Proxy, I need to define a specific datatype and this is then applying a certain MessageBuilder (defined in the axis2.xml).
But when the MessageBuilder fails (i.e. I try to read a text file with the XMLBuilder) I get an exception in the console, but my "faultSequence" is not called. But I need to do a certain Error Handling in case of any read problem.
How can I catch Exceptions from the Transport Layer (MessageBuilder) in a Proxy?
As far as i understand , your requirement is to catch an Error in the Transport layer and handle that in the Application level (i.e : Mediation level). which means the layer above.
But i think it violates layered architecture of the messaging framework. You should catch the Exception at the Message Builder itself and throw an Axis Fault so that underlying synapse transport layer (in this case Axis2) will handle that error. (It will send a fault to the client.)
If we look at the TCP protocol stack that is the practice which is commonly used.
If you really want to filter this errors at mediation level. Catch that Error in the Message Builder and add a Message Context property or custom message and pass it as a successful message. And Do a filter in mediation level and handle.
But again that is ugly.
:)
--Charith
Have you defined onError attribute in your configuration?
<sequence name="main" onError="myFaultSequence">
You can have more information in this sample.