Thanks for the quick reply.
But how do I handle the Exceptions at a common place instead of try-catch
in each of the actors? (like SQL Exceptions )
On Tuesday, July 1, 2014 6:48:17 PM UTC+5:30, √ wrote:
>
> I'd recommend against using Exceptions for validation. The non-existence
> of an Employee is a natural thing given an arbitrary id—it is not
> exceptional.
>
>
> On Tue, Jul 1, 2014 at 3:08 PM, Yadukrishnan K <yada...@gmail.com
> <javascript:>> wrote:
>
>> So do I have to do it in each of the actors ?
>> Is there any other way to handle it in a central place? For ex: in Spring
>> MVC, all the exceptions thrown from the controller can be handled using
>> @ControllerAdvice. Just looking if there is any similar thing.
>>
>> Not just this, I want to handle any SQLExceptions like Constraint
>> Violation and return a meaningful message to the caller. For that also, I
>> need to use try-catch in each of the actors and send corresponding message ?
>>
>>
>>
>>
>> On Tuesday, July 1, 2014 6:27:42 PM UTC+5:30, Yadukrishnan K wrote:
>>>
>>> I am a newbie to akka actor system. I am developing an application using
>>> Java, Spring, Hibernate and Akka.
>>> I am having problems with exception handling.
>>>
>>> My scenario is given below :
>>>
>>> REST API --> Spring MVC --> Service Layer (Actor) --> Hibernate
>>> Repository.
>>> Assume that I am trying to find an employee with id 1.
>>>
>>> Employee emp = HibernateRepository.findById(Employee.class, id);
>>> sender().tell(emp, self());
>>>
>>> If the employee with id=1 doesn't exist, the emp object will be NULL and
>>> sending NULL as message will throw InvalidMessageException.
>>> Is it possible to handle this exception and throw a custom Exception to
>>> the caller, say NoEntityFoundException? This help me to check if the result
>>> I obtained is of Employee or CustomException. Currently, I am getting
>>> Future timeout only.
>>>
>>> I have a BaseActor which extends akka.actor.AbstractActor. I also have
>>> another class, BaseModuleActor which extends BaseActor, as shown below.
>>>
>>> public class BaseModuleActor extends BaseActor {
>>>
>>> public <T> ActorRef getActorRef(ActorSystem system,Class<T> clazz){
>>> return system.actorOf(
>>> SpringExtension.SpringExtProvider.get(system).
>>> props(clazz));
>>> }
>>> }
>>>
>>> All my actors are extending this actor, where I am doing like below
>>>
>>> @Override
>>> public PartialFunction<Object, BoxedUnit> receive(){
>>> return ReceiveBuilder
>>> .match(Long.class, id-> getEmployeeById(id))
>>> .build()
>>> .orElse(matchAny());
>>> }
>>> private void getEmployeeById(Long id){
>>> Employee emp = HibernateRepository.findById(Employee.class, id);
>>> sender().tell(emp, self());
>>> }
>>>
>>>
>>> But I am now stuck with handling the exceptions at a common place using
>>> the supervisor strategy.
>>> How can I catch the InvalidMessageException and resends some meaningful
>>> message to the caller. Is it possible?
>>>
>>>
>>> Regards,
>>> Yadu
>>>
>> --
>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>> >>>>>>>>>> Check the FAQ:
>> http://doc.akka.io/docs/akka/current/additional/faq.html
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>
>
>
> --
> Cheers,
> √
>
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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