I'm new to scala so I might not be clear with the issue I'm facing, I'll do my best to clarify.
In an existing codebase, there is a servlet, with a post method (org.scalatra.ScalatraBase), similar to:
val myPost: Route = post("/endpoint/", operation(myoptions)) {
If the logic in this function throws a RuntimeException, the response is serialized using the exception's toString method
I want to convert my code to asyncPost (org.scalatra.AsyncSupport), similar to:
val myPost: Route = asyncPost("/endpoint/", operation(myoptions)) {
now if the logic in this function throws the same exception, I get:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="keywords" content="error"/>
<title>Unexpected Failure</title>
<style type="text/css">
...
The code looks like:
val response = for {
myMagic <- doMagic(parsedBody) // returns Try[Magic] <- exception thrown here is serialized correctly
newMagic = moreMagic(myMagic) // returns Future[MoreMagic] <- exception thrown here is converted to that html response
} yield newMagic
response.fold(
fa => fa,
fb => for {
ha <- fb
} yield someMoreMagic(ha)
)
}