CODEWITHSUNDEEP
javanetflixhystrix
j2emanue
j2emanue

Reputation: 62559

HystrixCommand annotation - how to do fallback with throw

I am using @HystrixCommand to create fallbacks in a java server.

Here is one method i have but the issue im having is im wondering am i allowed to throw in the fall back ?

@HystrixCommand(fallbackMethod = "doFallback", commandKey = "doFallbackCommand")
   public Response getGraphPoints(String Id, String position) {

//do some work ... finally create a response

       return a_response;

   }

   public Response doFallback(String Id, String position) {
     //can i do this in hystrix command ? or do i really have to return a Response here?no other method will catch this throw for now
       throw new ServiceUnavailableException("points could not be found");
   }

The Reason im asking is that when i run this im getting the following error:

ERROR [HystrixTimer-1] [com.netflix.hystrix.contrib.javanica.command.GenericCommand] [myserver] failed to processed fallback is the method: 'doFallback'.

Upvotes: 2

Views: 6005

Answers (1)

Diego Rojas
Diego Rojas

Reputation: 244

I had the same problem, now i understand a little how hystrix works. Hystrix does not require you to set one fallback method. Unless you want to return a default data or add business logic for that case, it is not necessary. If you throw an exception you'll "confuse" hystrix, so it will throw an HystrixRuntimeException.

I hope it helps.

Upvotes: 6

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