Squashed 'third_party/flatbuffers/' content from commit acc9990ab
Change-Id: I48550d40d78fea996ebe74e9723a5d1f910de491
git-subtree-dir: third_party/flatbuffers
git-subtree-split: acc9990abd2206491480291b0f85f925110102ea
diff --git a/grpc/samples/greeter/client.cpp b/grpc/samples/greeter/client.cpp
new file mode 100644
index 0000000..2e42f8f
--- /dev/null
+++ b/grpc/samples/greeter/client.cpp
@@ -0,0 +1,85 @@
+#include "greeter.grpc.fb.h"
+#include "greeter_generated.h"
+
+#include <grpc++/grpc++.h>
+
+#include <iostream>
+#include <memory>
+#include <string>
+
+class GreeterClient {
+ public:
+ GreeterClient(std::shared_ptr<grpc::Channel> channel)
+ : stub_(Greeter::NewStub(channel)) {}
+
+ std::string SayHello(const std::string &name) {
+ flatbuffers::grpc::MessageBuilder mb;
+ auto name_offset = mb.CreateString(name);
+ auto request_offset = CreateHelloRequest(mb, name_offset);
+ mb.Finish(request_offset);
+ auto request_msg = mb.ReleaseMessage<HelloRequest>();
+
+ flatbuffers::grpc::Message<HelloReply> response_msg;
+
+ grpc::ClientContext context;
+
+ auto status = stub_->SayHello(&context, request_msg, &response_msg);
+ if (status.ok()) {
+ const HelloReply *response = response_msg.GetRoot();
+ return response->message()->str();
+ } else {
+ std::cerr << status.error_code() << ": " << status.error_message()
+ << std::endl;
+ return "RPC failed";
+ }
+ }
+
+ void SayManyHellos(const std::string &name, int num_greetings,
+ std::function<void(const std::string &)> callback) {
+ flatbuffers::grpc::MessageBuilder mb;
+ auto name_offset = mb.CreateString(name);
+ auto request_offset =
+ CreateManyHellosRequest(mb, name_offset, num_greetings);
+ mb.Finish(request_offset);
+ auto request_msg = mb.ReleaseMessage<ManyHellosRequest>();
+
+ flatbuffers::grpc::Message<HelloReply> response_msg;
+
+ grpc::ClientContext context;
+
+ auto stream = stub_->SayManyHellos(&context, request_msg);
+ while (stream->Read(&response_msg)) {
+ const HelloReply *response = response_msg.GetRoot();
+ callback(response->message()->str());
+ }
+ auto status = stream->Finish();
+ if (!status.ok()) {
+ std::cerr << status.error_code() << ": " << status.error_message()
+ << std::endl;
+ callback("RPC failed");
+ }
+ }
+
+ private:
+ std::unique_ptr<Greeter::Stub> stub_;
+};
+
+int main(int argc, char **argv) {
+ std::string server_address("localhost:50051");
+
+ auto channel =
+ grpc::CreateChannel(server_address, grpc::InsecureChannelCredentials());
+ GreeterClient greeter(channel);
+
+ std::string name("world");
+
+ std::string message = greeter.SayHello(name);
+ std::cerr << "Greeter received: " << message << std::endl;
+
+ int num_greetings = 10;
+ greeter.SayManyHellos(name, num_greetings, [](const std::string &message) {
+ std::cerr << "Greeter received: " << message << std::endl;
+ });
+
+ return 0;
+}