A GRPC version of Josh’s 2015 Blog on Protobuf support in Spring.

Service reflection:

$ grpcurl -plaintext localhost:50051 describe demo.Greeter
demo.Greeter is a service:
service Greeter {
  rpc Hello ( .demo.CustomerRequest ) returns ( .demo.Customer );
}

Hello world:

$ grpcurl -plaintext -d '{}' localhost:50051 demo.Greeter/Hello
{
  "id": 1,
  "firstName": "Josh",
  "lastName": "Long"
}

Native image:

$ CP=`java -jar $HOME/.m2/repository/org/springframework/boot/experimental/spring-boot-thin-launcher/1.0.22.RELEASE/spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar --thin.archive=target/vanilla-proto-0.0.1-SNAPSHOT.jar --thin.classpath`
$ native-image -Dio.netty.noUnsafe=true --no-server -H:Name=target/demo \
-H:+ReportExceptionStackTraces --no-fallback --allow-incomplete-classpath --report-unsupported-elements-at-runtime \
-DremoveUnusedAutoconfig=true -cp $CP \
--initialize-at-build-time='com.google.protobuf.ExtensionRegistry,com.google.protobuf.ExtensionLite,com.google.protobuf.Extension,io.netty.handler.codec.http2.ReadOnlyHttp2Headers,io.netty.handler.codec.http2.CharSequenceMap,io.netty.handler.codec.http2.Http2Headers$PseudoHeaderName' \
com.example.ProtoApplication`