meysam/spark-demo

spark-demo

for handling errors and exceptions in javaspark:

you can use custom mapper for the user-defined exceptions to route the request-response objects to your custom mapper and return an appropriate response with any format which is needed. In some cases, you also can utilize built-in functions in Spark class like internalServerError and notFound.

exception(Exception.class, (exception, request, response) -> { response.type("application/json"); response.body("internal server"); });

exception(IdNotFoundException.class, (exception, request, response)->{ response.type("application/json"); response.body(exception.getMessage()); });

#How to test:

steps:
    send this request to get normal response:
    http://localhost:4567/hello/1
    
    send a wrong id to get IdNotFoundException:
    http://localhost:4567/hello/3
    
    send a wrong format for id to get Exception
    (internal server error due to casting String to Number)
    http://localhost:4567/hello/abc