gRPC: fail code generation gracefully on default java package

[michalszynkiewicz]

fixes #17485

[michalszynkiewicz]

For the user, the error looks as follows:

Using default java package is not supported for gRPC code generation. Please specify `option java_package = "your.package"` in my-new.proto
java.lang.IllegalArgumentException: Code generation failed. Please check the log above for details.
        at io.quarkus.grpc.protoc.plugin.MutinyGrpcGenerator.validateServices(MutinyGrpcGenerator.java:59)
        at io.quarkus.grpc.protoc.plugin.MutinyGrpcGenerator.generateFiles(MutinyGrpcGenerator.java:44)
        at com.salesforce.jprotoc.ProtocPlugin.lambda$generate$1(ProtocPlugin.java:191)
        at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
        at java.base/java.util.Collections$2.tryAdvance(Collections.java:4745)
        at java.base/java.util.Collections$2.forEachRemaining(Collections.java:4753)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)
        at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
        at com.salesforce.jprotoc.ProtocPlugin.generate(ProtocPlugin.java:196)
        at com.salesforce.jprotoc.ProtocPlugin.generate(ProtocPlugin.java:80)
        at com.salesforce.jprotoc.ProtocPlugin.generate(ProtocPlugin.java:51)
        at com.salesforce.jprotoc.ProtocPlugin.generate(ProtocPlugin.java:43)
        at io.quarkus.grpc.protoc.plugin.MutinyGrpcGenerator.main(MutinyGrpcGenerator.java:311)
--q-grpc_out: protoc-gen-q-grpc: Plugin failed with status code 1.

[quarkus-bot]

This workflow status is outdated as a new workflow run has been triggered.

🚫 This workflow run has been cancelled.

Failing Jobs - Building eb7d130

⚠️ Artifacts of the workflow run were not available thus the report misses some details.

Status	Name	Step	Test failures	Logs	Raw logs
⌛	Gradle Tests - JDK 11	Build	⚠️ Check →	Logs	Raw logs
⌛	Gradle Tests - JDK 11 Windows	Build	⚠️ Check →	Logs	Raw logs
⌛	Native Tests - gRPC	Build	⚠️ Check →	Logs	Raw logs

[cescoffier]

Just a typo in the message.

[cescoffier]

+1