( I apologize for the re-post if you've seen this under the akka /
akka-http tag at stackoverflow already )
Hello list,
I have a need to encode exception messages in to a specific JSON format in
my http responses. I was wondering how I could catch a
DeserializationException in my route or outside of it or encode the
DeserializationException.
I tried the following:
1) the below exception handler around my route:
val exceptionHandler = ExceptionHandler {
case e: DeserializationException => complete(StatusCodes.BadRequest,
ServiceBrokerError(e.getMessage))
}
2) JSON format in implicit scope for DeserializationException
implicit object DeserializationExceptionFormat extends DefaultJsonProtocol
with RootJsonFormat[DeserializationException] {
def write(e: DeserializationException) = JsObject("message" ->
JsString(e.getMessage))
def read(v: JsValue) = throw new NotImplementedError()
}
Neither of these made any difference and DeserializationExceptions are
still encoded in to the http response body per below:
HTTP/1.1 400 Bad Request
Content-Length: 74
Content-Type: text/plain; charset=UTF-8
Date: Thu, 20 Apr 2017 21:23:11 GMT
Server: akka-http/10.0.1
The request content was malformed:
Node count may not be a floating number
Some additional context- my routes rely on the spray-json integration to
map request entities to objects, such as:
// service instance management related routes
put {
entity(as[CreateInstance]) { createInstance =>
handleCreateInstance(s"cluster-$clusterId", createInstance) }
}
it is the DeserializationException that I throw from the Format
implementation of CreateInstance that I would like to capture somewhere in
or around my routes..
Any suggestions are greatly appreciated.
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