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MIGRATING.md

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Migrating to 0.42.0

0.42.0 contains a breaking change for akka-http clients

Previously, client methods naively picked the "best" success schema, applying that to all success statuses, and did not attempt to handle non-success statuses.

addressesClient
  .getAddress(traceBuilder, "addressId")
  .fold(_ => respond.NotFound, { address =>
    respond.OK(sdefs.User("1234", sdefs.UserAddress(address.line1, address.line2, address.line3)))
  })

(example taken from modules/sample/src/test/scala/core/AkkaHttp/AkkaHttpFullTracerTest.scala)

Now, it is explicitly required to handle all response statuses, either by using the mapped names directly:

addressesClient
  .getAddress(traceBuilder, "addressId")
  .fold(_ => respond.NotFound, {
    case GetAddressResponse.OK(address) => respond.OK(sdefs.User("1234", sdefs.UserAddress(address.line1, address.line2, address.line3)))
    case GetAddressResponse.NotFound => respond.NotFound
  })

... or by using the fold convenience method:

addressesClient
  .getAddress(traceBuilder, "addressId")
  .fold(_ => respond.NotFound, _.fold(
    handleOK = address => respond.OK(sdefs.User("1234", sdefs.UserAddress(address.line1, address.line2, address.line3)))
    handleNotFound = respond.NotFound
  ))

Unspecified status codes will still be passed through to the error result, so you can still use your existing 3xx or 5xx handlers.