graal support?

I use jjwt generate token for my micronaut app，I use graalvm build native-image, when generate token, I get this error:

io.jsonwebtoken.lang.UnknownClassException: Unable to load class named [io.jsonwebtoken.impl.DefaultJwtBuilder] from the thread context, current, or system/application ClassLoaders. All heuristics have been exhausted. Class could not be found. Have you remembered to include the jjwt-impl.jar in your runtime classpath?

I already setting jjwt-impl.jar in build.gradle, but because of native-image has limitation with reflection, so dynamic class loading can not work, I follow the graal manual add reflection-config.json in META-INF and its working!

[ { "name" : "io.jsonwebtoken.impl.DefaultJwtBuilder", "allDeclaredFields" : true, "allPublicMethods" : true, "allDeclaredConstructors" : true } ]

so can we just put the graal config in jjwt-impl.jar to support graal native-image?

[lhazlewood]

A CompressionCodecResolver is always needed in case a zip header is encountered, but I understand your point around reflection.

We have discussed at times moving the impl package and its sub-packages into a single .jar and changing everything in there to package protected to prevent people from depending on those classes, but there needs to be some significant analysis to ensure nothing can ‘leak’ unexpectedly. It’ll be a decent amount of work.

A reflect-config.json might be a better/faster stop-gap in the meantime however.

[linghengqian]

• Late reply, I’ve been busy with other work before. The current PR is at https://github.com/oracle/graalvm-reachability-metadata/pull/116 . If anyone thinks that the GraalVM reachability metadata generated by my unit test is missing, point it out in the issue at https://github.com/oracle/graalvm-reachability-metadata.