Add UnsupportedContentTypeException javadsl #376
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mdedetrich
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| class UnsupportedContentTypeException( | ||
| private val _supported: java.util.Set[jm.model.ContentTypeRange], | ||
| private val _actualContentType: Optional[jm.model.ContentType]) | ||
| extends RuntimeException(_supported.asScala.mkString( |
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Converting the java data-structures to Scala is done here so that the runtime exception message is the same as it is currently. This is done just incase currently existing code is matching against the exception message although one can argue that you shouldn't be doing this, furthermore if users are doing this its likely they will just be matching against Unsupported Content-Type in which case this will still work.
In short, I am not against adjust the exception message so it just calls .toString on the Java data structures.
| @@ -190,7 +202,7 @@ object Unmarshaller | |||
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| override def equals(that: Any): Boolean = that match { | |||
| case that: UnsupportedContentTypeException => | |||
| that.canEqual(this) && that.supported == this.supported && that.actualContentType == this.actualContentType | |||
| that.canEqual(this) && super.equals(this) | |||
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This will point to org.apache.pekko.http.javadsl.unmarshalling.Unmarshaller.UnsupportedContentTypeException equals method which does the proper structural equality check.
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| override def equals(that: Any): Boolean = that match { | ||
| case that: UnsupportedContentTypeException => | ||
| that._supported == this._supported && that._actualContentType == this._actualContentType |
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Since it may not be immediately obvious, both java.util.Set and java.util.Optional equals methods perform structural equality, not reference (I tested this in Scala repl).
mdedetrich
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jrudolph,
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gmethvin,
He-Pin,
nvollmar,
seglo and
pjfanning
| import pekko.http.scaladsl.unmarshalling.Unmarshaller.{ | ||
| EnhancedFromEntityUnmarshaller, | ||
| UnsupportedContentTypeException | ||
| } |
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How, it passes MiMa? The exception being thrown here is the same.
| } else FastFuture.failed(UnsupportedContentTypeException(Some(entity.contentType), | ||
| ContentTypeRange(t.toRange.asScala))) | ||
| } else FastFuture.failed( | ||
| pekko.http.scaladsl.unmarshalling.Unmarshaller.UnsupportedContentTypeException(Some(entity.contentType), |
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split with a single import line ? this line is too long
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Fixed and pushed.
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So I had to undo this change because using a single inline import makes the code fail to compile on Scala 3 due to
[error] -- [E049] Reference Error: /home/runner/work/incubator-pekko-http/incubator-pekko-http/http/src/main/scala/org/apache/pekko/http/javadsl/unmarshalling/Unmarshaller.scala:88:33
[error] 88 | } else FastFuture.failed(UnsupportedContentTypeException(Some(entity.contentType),
A better alternative might be to throw the javadsl variant however this is technically a behavioural change (hypothetically users may be relying on the scala specific features of scaladsl when catching the exception).
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| import org.apache.pekko | ||
| import pekko.actor.ClassicActorSystemProvider | ||
| import pekko.annotation.InternalApi | ||
| import pekko.http.impl.model.JavaQuery | ||
| import pekko.http.impl.util.JavaMapping | ||
| import pekko.http.impl.util.JavaMapping.Implicits._ | ||
| import pekko.http.javadsl.model._ | ||
| import pekko.http.{ javadsl => jm } |
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Do you think of using javadsl instead of jm?
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jm is whats used in the rest of the codebase so I kept the same convention.
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added to 1.1.0 milestone - seems ok to me if targeted just at that milestone I'm not fully convinced that we can't have some binary incompatibility in a 1.1.0 release but the changes here to maintain bin compatibility are not very complicated and look maintainable. |
fine with me, that was the original intent anyways.
We did decide that both pekko and pekko-http strictly follow semver due to being critical components which is why https://github.com/apache/incubator-pekko-http/blob/38aa25e7c20232a4226c4ea5767813b99bca870a/build.sbt#L59 is set. In any the point is moot since this PR goes out of its way to not break binary compatibility. |
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Going to go ahead and merge this |
This PR adds a
javadslequivalent oforg.apache.pekko.http.scaladsl.unmarshalling.Unmarshaller.UnsupportedContentTypeExceptionwithout breaking binary compatibility (you can confirm this by runningsbt mimaReportBinaryIssues)While the changes aren't as trivial as what would be considered ideal, they are necessary in order to not break MiMa. Of note is that the core data structure for the exception is being changed from Scala
Set/Optionto JavaSet/Optional. Additionally the javadsl version ofUnsupportedContentTypeExceptiondoesn't support Scala specific language features (i.e.Product/Serializable/canEqual).