Client.java

package io.vertx.example.grpc.producer;

import io.grpc.ManagedChannel;
import io.vertx.core.AbstractVerticle;
import io.vertx.example.grpc.Messages;
import io.vertx.example.grpc.VertxProducerServiceGrpc;
import io.vertx.example.util.Runner;
import io.vertx.grpc.VertxChannelBuilder;

/*
 * @author <a href="mailto:plopes@redhat.com">Paulo Lopes</a>
 */
public class Client extends AbstractVerticle {

  // Convenience method so you can run it in your IDE
  public static void main(String[] args) {
    Runner.runExample(Client.class);
  }

  @Override
  public void start() {

    // Create the channel
    ManagedChannel channel = VertxChannelBuilder
      .forAddress(vertx, "localhost", 8080)
      .usePlaintext()
      .build();

    // Get a stub to use for interacting with the remote service
    VertxProducerServiceGrpc.ProducerServiceVertxStub stub = VertxProducerServiceGrpc.newVertxStub(channel);

    // Call the remote service
    stub.streamingInputCall(writeStream -> {
      for (int i = 0; i < 10; i++) {
        writeStream.write(Messages.StreamingInputCallRequest.newBuilder().build());
      }
      writeStream.end();
    }).onComplete(ar -> {
      if (ar.succeeded()) {
        System.out.println("Server replied OK");
      } else {
        ar.cause().printStackTrace();
      }
    });
  }
}