handleExceptions
Description
Catches exceptions thrown by the inner route and handles them using the specified ExceptionHandler
ExceptionHandler
.
Using this directive is an alternative to using a global implicitly defined ExceptionHandler
ExceptionHandler
that applies to the complete route.
See Exception Handling for general information about options for handling exceptions.
Example
- Scala
-
source
val divByZeroHandler = ExceptionHandler { case _: ArithmeticException => complete(StatusCodes.BadRequest, "You've got your arithmetic wrong, fool!") } val route = path("divide" / IntNumber / IntNumber) { (a, b) => handleExceptions(divByZeroHandler) { complete(s"The result is ${a / b}") } } // tests: Get("/divide/10/5") ~> route ~> check { responseAs[String] shouldEqual "The result is 2" } Get("/divide/10/0") ~> route ~> check { status shouldEqual StatusCodes.BadRequest responseAs[String] shouldEqual "You've got your arithmetic wrong, fool!" }
- Java
-
source
import static org.apache.pekko.http.javadsl.server.Directives.complete; import static org.apache.pekko.http.javadsl.server.Directives.handleExceptions; import static org.apache.pekko.http.javadsl.server.Directives.path; final ExceptionHandler divByZeroHandler = ExceptionHandler.newBuilder() .match( ArithmeticException.class, x -> complete(StatusCodes.BAD_REQUEST, "You've got your arithmetic wrong, fool!")) .build(); final Route route = path( PathMatchers.segment("divide").slash(integerSegment()).slash(integerSegment()), (a, b) -> handleExceptions(divByZeroHandler, () -> complete("The result is " + (a / b)))); // tests: testRoute(route).run(HttpRequest.GET("/divide/10/5")).assertEntity("The result is 2"); testRoute(route) .run(HttpRequest.GET("/divide/10/0")) .assertStatusCode(StatusCodes.BAD_REQUEST) .assertEntity("You've got your arithmetic wrong, fool!");
1.1.0