reactive-grpc: reactor fails to generate gRPC stub in latest version

Hey,

gRPC	protoc	reactive
1.29.0	3.12.2	1.0.1

I just updated to the latest gRPC/protoc/reactive-grpc and the compiler fails with the following message:

AdminServiceGrpc.java:[76,29] error: cannot find symbol
  symbol:   class StubFactory
  location: class AbstractStub

And the generated code:

  public static AdminServiceBlockingStub newBlockingStub(
      io.grpc.Channel channel) {
    io.grpc.stub.AbstractStub.StubFactory<AdminServiceBlockingStub> factory =
      new io.grpc.stub.AbstractStub.StubFactory<AdminServiceBlockingStub>() {
        @java.lang.Override
        public AdminServiceBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
          return new AdminServiceBlockingStub(channel, callOptions);
        }
      };
    return AdminServiceBlockingStub.newStub(factory, channel);
  }

I’m using this maven plugin to generate the stubs:

  <properties>
    <protobuf.version>3.12.2</protobuf.version>
    <grpc.version>1.29.0</grpc.version>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.xolstice.maven.plugins</groupId>
        <artifactId>protobuf-maven-plugin</artifactId>
        <version>0.6.1</version>
        <extensions>true</extensions>
        <configuration>
          <pluginId>grpc-java</pluginId>
          <protocArtifact>
            com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}
          </protocArtifact>
          <pluginArtifact>
            io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
          </pluginArtifact>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>compile-custom</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

I also tried your protoc plugin, but I get the same issues.

I cannot find a table of version mapping, so I’m not sure if the versions do not match or the maven plugin doesn’t work correctly or something else. Any help is appreciated.