Tyrus support in GraalVM

[jbescos]

Environment Details

• Helidon Version: 2.0.0-RC1
• Helidon SE
• JDK version:GraalVM Version 20.1.0 (Java Version 11.0.7)
• OS: Ubuntu 18.04.4 LTS
• Docker version (if applicable):

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Problem Description

I talked with @jsupol and he thinks we need to add the native properties in tyrus helidon module to allow reflection.

Exception in thread "main" java.lang.NullPointerException
at org.glassfish.tyrus.core.TyrusEndpointWrapper.(TyrusEndpointWrapper.java:250)
at org.glassfish.tyrus.core.TyrusEndpointWrapper.(TyrusEndpointWrapper.java:152)
at org.glassfish.tyrus.core.TyrusWebSocketEngine.register(TyrusWebSocketEngine.java:639)
at io.helidon.webserver.tyrus.TyrusSupport$Builder.lambda$build$1(TyrusSupport.java:198)
at java.lang.Iterable.forEach(Iterable.java:75)
at io.helidon.webserver.tyrus.TyrusSupport$Builder.build(TyrusSupport.java:195)
at io.helidon.webserver.examples.websocket.Main.createRouting(Main.java:54)
at io.helidon.webserver.examples.websocket.Main.startWebServer(Main.java:59)
at io.helidon.webserver.examples.websocket.Main.main(Main.java:85)

Steps to reproduce

cd helidon/examples/webserver/websocket
mvn package -Pnative-image
./target/helidon-examples-webserver-websocket

[jbescos]

We can make it work in this way:

cd helidon/examples/webserver/websocket
mkdir -p src/main/resources/META-INF/native-image
$JAVA_HOME/bin/java -agentlib:native-image-agent=config-output-dir=src/main/resources/META-INF/native-image -jar target/helidon-examples-webserver-websocket.jar
mvn package -Pnative-image && ./target/helidon-examples-webserver-websocket

But this means that any user that wants to use tyrus natively, they need to generate that META-INF files too. There should be a better way to set the configuration directly in helidon/webserver/tyrus but I need to find out how.

[tomas-langer]

This is a known issue, websocket was not yet tested with native image.