Spring boot REST API Exception Demo

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About this Demo:

This Example allocates a simple Rest API that calls a fake service class. The purpose of this demo is to handle some bad API calls from the frontend and let the backend respond accordingly.

Exceptions handled in this demo:

• Custom Exception ResourceNotFoundException:

can be used to throw an error when querying a resource in your DB.

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• MissingRequestHeaderException:

Self-explanatory: used when an argument in the request header is missing.

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• MethodArgumentTypeMismatchException:

Triggered when the argument in the request is in the wrong data-type.

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• NoHandlerFoundException

Triggered when the exception has no exception-handler, in this demo it was implemented as a trigger for calling an API address that does not exist.

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The Demo utilizes the @ControllerAdvice to handle the API Exceptions.

Only Spring Web was used as a dependency.