Merge pull request #29 from yang-g/helloworld

Add helloworld example in c++

cpp/helloworld/Makefile

+#
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+CXX=g++
+CPPFLAGS=-I/usr/local/include -pthread
+CXXFLAGS=-std=c++11
+LDFLAGS=-L/usr/local/lib -lgrpc -lgrpc++ -lprotobuf -lpthread -ldl
+
+all: greeter_client greeter_server
+
+greeter_client: helloworld.pb.o greeter_client.o
+	$(CXX) $(CPPFLAGS) $^ $(LDFLAGS) -o $@
+
+greeter_server: helloworld.pb.o greeter_server.o
+	$(CXX) $(CPPFLAGS) $^ $(LDFLAGS) -o $@
+
+clean:
+	rm -f *.o greeter_client greeter_server
+

cpp/helloworld/greeter_client.cc

+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <iostream>
+#include <memory>
+#include <string>
+
+#include <grpc/grpc.h>
+#include <grpc++/channel_arguments.h>
+#include <grpc++/channel_interface.h>
+#include <grpc++/client_context.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/status.h>
+#include "helloworld.pb.h"
+
+using grpc::ChannelArguments;
+using grpc::ChannelInterface;
+using grpc::ClientContext;
+using grpc::Status;
+using helloworld::HelloRequest;
+using helloworld::HelloReply;
+using helloworld::Greeter;
+
+class GreeterClient {
+ public:
+  GreeterClient(std::shared_ptr<ChannelInterface> channel)
+      : stub_(Greeter::NewStub(channel)) {}
+
+  std::string SayHello(const std::string& user) {
+    HelloRequest request;
+    request.set_name(user);
+    HelloReply reply;
+    ClientContext context;
+
+    Status status = stub_->sayHello(&context, request, &reply);
+    if (status.IsOk()) {
+      return reply.message();
+    } else {
+      return "Rpc failed";
+    }
+  }
+
+  void Shutdown() { stub_.reset(); }
+
+ private:
+  std::unique_ptr<Greeter::Stub> stub_;
+};
+
+int main(int argc, char** argv) {
+  grpc_init();
+
+  GreeterClient greeter(
+      grpc::CreateChannel("localhost:50051", ChannelArguments()));
+  std::string user("world");
+  std::string reply = greeter.SayHello(user);
+  std::cout << "Greeter received: " << reply << std::endl;
+
+  greeter.Shutdown();
+
+  grpc_shutdown();
+}

cpp/helloworld/greeter_server.cc

+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+
+#include <grpc/grpc.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc++/server_context.h>
+#include <grpc++/status.h>
+#include "helloworld.pb.h"
+
+using grpc::Server;
+using grpc::ServerBuilder;
+using grpc::ServerContext;
+using grpc::Status;
+using helloworld::HelloRequest;
+using helloworld::HelloReply;
+using helloworld::Greeter;
+
+class GreeterServiceImpl final : public Greeter::Service {
+  Status sayHello(ServerContext* context, const HelloRequest* request,
+                  HelloReply* reply) override {
+    std::string prefix("Hello ");
+    reply->set_message(prefix + request->name());
+    return Status::OK;
+  }
+};
+
+void RunServer() {
+  std::string server_address("0.0.0.0:50051");
+  GreeterServiceImpl service;
+
+  ServerBuilder builder;
+  builder.AddPort(server_address);
+  builder.RegisterService(&service);
+  std::unique_ptr<Server> server(builder.BuildAndStart());
+  std::cout << "Server listening on " << server_address << std::endl;
+  while (true) {
+    std::this_thread::sleep_for(std::chrono::seconds(5));
+  }
+}
+
+int main(int argc, char** argv) {
+  grpc_init();
+
+  RunServer();
+
+  grpc_shutdown();
+  return 0;
+}

cpp/helloworld/helloworld.pb.h

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: helloworld.proto
+
+#ifndef PROTOBUF_helloworld_2eproto__INCLUDED
+#define PROTOBUF_helloworld_2eproto__INCLUDED
+
+#include <string>
+
+#include <google/protobuf/stubs/common.h>
+
+#if GOOGLE_PROTOBUF_VERSION < 3000000
+#error This file was generated by a newer version of protoc which is
+#error incompatible with your Protocol Buffer headers.  Please update
+#error your headers.
+#endif
+#if 3000000 < GOOGLE_PROTOBUF_MIN_PROTOC_VERSION
+#error This file was generated by an older version of protoc which is
+#error incompatible with your Protocol Buffer headers.  Please
+#error regenerate this file with a newer version of protoc.
+#endif
+
+#include <google/protobuf/arena.h>
+#include <google/protobuf/arenastring.h>
+#include <google/protobuf/generated_message_util.h>
+#include <google/protobuf/metadata.h>
+#include <google/protobuf/message.h>
+#include <google/protobuf/repeated_field.h>
+#include <google/protobuf/extension_set.h>
+#include <google/protobuf/unknown_field_set.h>
+#include <grpc++/impl/internal_stub.h>
+#include <grpc++/impl/service_type.h>
+#include <grpc++/status.h>
+
+namespace grpc {
+class CompletionQueue;
+class ChannelInterface;
+class RpcService;
+class ServerContext;
+template <class OutMessage> class ClientAsyncResponseReader;
+template <class OutMessage> class ServerAsyncResponseWriter;
+}  // namespace grpc
+// @@protoc_insertion_point(includes)
+
+namespace helloworld {
+
+// Internal implementation detail -- do not call these.
+void protobuf_AddDesc_helloworld_2eproto();
+void protobuf_AssignDesc_helloworld_2eproto();
+void protobuf_ShutdownFile_helloworld_2eproto();
+
+class HelloRequest;
+class HelloReply;
+
+// ===================================================================
+
+class HelloRequest : public ::google::protobuf::Message {
+ public:
+  HelloRequest();
+  virtual ~HelloRequest();
+
+  HelloRequest(const HelloRequest& from);
+
+  inline HelloRequest& operator=(const HelloRequest& from) {
+    CopyFrom(from);
+    return *this;
+  }
+
+  static const ::google::protobuf::Descriptor* descriptor();
+  static const HelloRequest& default_instance();
+
+  void Swap(HelloRequest* other);
+
+  // implements Message ----------------------------------------------
+
+  inline HelloRequest* New() const { return New(NULL); }
+
+  HelloRequest* New(::google::protobuf::Arena* arena) const;
+  void CopyFrom(const ::google::protobuf::Message& from);
+  void MergeFrom(const ::google::protobuf::Message& from);
+  void CopyFrom(const HelloRequest& from);
+  void MergeFrom(const HelloRequest& from);
+  void Clear();
+  bool IsInitialized() const;
+
+  int ByteSize() const;
+  bool MergePartialFromCodedStream(
+      ::google::protobuf::io::CodedInputStream* input);
+  void SerializeWithCachedSizes(
+      ::google::protobuf::io::CodedOutputStream* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  int GetCachedSize() const { return _cached_size_; }
+  private:
+  void SharedCtor();
+  void SharedDtor();
+  void SetCachedSize(int size) const;
+  void InternalSwap(HelloRequest* other);
+  private:
+  inline ::google::protobuf::Arena* GetArenaNoVirtual() const {
+    return _internal_metadata_.arena();
+  }
+  inline void* MaybeArenaPtr() const {
+    return _internal_metadata_.raw_arena_ptr();
+  }
+  public:
+
+  ::google::protobuf::Metadata GetMetadata() const;
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  // optional string name = 1;
+  inline void clear_name();
+  static const int kNameFieldNumber = 1;
+  inline const ::std::string& name() const;
+  inline void set_name(const ::std::string& value);
+  inline void set_name(const char* value);
+  inline void set_name(const char* value, size_t size);
+  inline ::std::string* mutable_name();
+  inline ::std::string* release_name();
+  inline void set_allocated_name(::std::string* name);
+
+  // @@protoc_insertion_point(class_scope:helloworld.HelloRequest)
+ private:
+
+  ::google::protobuf::internal::InternalMetadataWithArena _internal_metadata_;
+  bool _is_default_instance_;
+  ::google::protobuf::internal::ArenaStringPtr name_;
+  mutable int _cached_size_;
+  friend void  protobuf_AddDesc_helloworld_2eproto();
+  friend void protobuf_AssignDesc_helloworld_2eproto();
+  friend void protobuf_ShutdownFile_helloworld_2eproto();
+
+  void InitAsDefaultInstance();
+  static HelloRequest* default_instance_;
+};
+// -------------------------------------------------------------------
+
+class HelloReply : public ::google::protobuf::Message {
+ public:
+  HelloReply();
+  virtual ~HelloReply();
+
+  HelloReply(const HelloReply& from);
+
+  inline HelloReply& operator=(const HelloReply& from) {
+    CopyFrom(from);
+    return *this;
+  }
+
+  static const ::google::protobuf::Descriptor* descriptor();
+  static const HelloReply& default_instance();
+
+  void Swap(HelloReply* other);
+
+  // implements Message ----------------------------------------------
+
+  inline HelloReply* New() const { return New(NULL); }
+
+  HelloReply* New(::google::protobuf::Arena* arena) const;
+  void CopyFrom(const ::google::protobuf::Message& from);
+  void MergeFrom(const ::google::protobuf::Message& from);
+  void CopyFrom(const HelloReply& from);
+  void MergeFrom(const HelloReply& from);
+  void Clear();
+  bool IsInitialized() const;
+
+  int ByteSize() const;
+  bool MergePartialFromCodedStream(
+      ::google::protobuf::io::CodedInputStream* input);
+  void SerializeWithCachedSizes(
+      ::google::protobuf::io::CodedOutputStream* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  int GetCachedSize() const { return _cached_size_; }
+  private:
+  void SharedCtor();
+  void SharedDtor();
+  void SetCachedSize(int size) const;
+  void InternalSwap(HelloReply* other);
+  private:
+  inline ::google::protobuf::Arena* GetArenaNoVirtual() const {
+    return _internal_metadata_.arena();
+  }
+  inline void* MaybeArenaPtr() const {
+    return _internal_metadata_.raw_arena_ptr();
+  }
+  public:
+
+  ::google::protobuf::Metadata GetMetadata() const;
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  // optional string message = 1;
+  inline void clear_message();
+  static const int kMessageFieldNumber = 1;
+  inline const ::std::string& message() const;
+  inline void set_message(const ::std::string& value);
+  inline void set_message(const char* value);
+  inline void set_message(const char* value, size_t size);
+  inline ::std::string* mutable_message();
+  inline ::std::string* release_message();
+  inline void set_allocated_message(::std::string* message);
+
+  // @@protoc_insertion_point(class_scope:helloworld.HelloReply)
+ private:
+
+  ::google::protobuf::internal::InternalMetadataWithArena _internal_metadata_;
+  bool _is_default_instance_;
+  ::google::protobuf::internal::ArenaStringPtr message_;
+  mutable int _cached_size_;
+  friend void  protobuf_AddDesc_helloworld_2eproto();
+  friend void protobuf_AssignDesc_helloworld_2eproto();
+  friend void protobuf_ShutdownFile_helloworld_2eproto();
+
+  void InitAsDefaultInstance();
+  static HelloReply* default_instance_;
+};
+// ===================================================================
+
+
+// ===================================================================
+
+// HelloRequest
+
+// optional string name = 1;
+inline void HelloRequest::clear_name() {
+  name_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline const ::std::string& HelloRequest::name() const {
+  // @@protoc_insertion_point(field_get:helloworld.HelloRequest.name)
+  return name_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline void HelloRequest::set_name(const ::std::string& value) {
+  
+  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
+  // @@protoc_insertion_point(field_set:helloworld.HelloRequest.name)
+}
+inline void HelloRequest::set_name(const char* value) {
+  
+  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:helloworld.HelloRequest.name)
+}
+inline void HelloRequest::set_name(const char* value, size_t size) {
+  
+  name_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:helloworld.HelloRequest.name)
+}
+inline ::std::string* HelloRequest::mutable_name() {
+  
+  // @@protoc_insertion_point(field_mutable:helloworld.HelloRequest.name)
+  return name_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline ::std::string* HelloRequest::release_name() {
+  
+  return name_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline void HelloRequest::set_allocated_name(::std::string* name) {
+  if (name != NULL) {
+    
+  } else {
+    
+  }
+  name_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), name);
+  // @@protoc_insertion_point(field_set_allocated:helloworld.HelloRequest.name)
+}
+
+// -------------------------------------------------------------------
+
+// HelloReply
+
+// optional string message = 1;
+inline void HelloReply::clear_message() {
+  message_.ClearToEmptyNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline const ::std::string& HelloReply::message() const {
+  // @@protoc_insertion_point(field_get:helloworld.HelloReply.message)
+  return message_.GetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline void HelloReply::set_message(const ::std::string& value) {
+  
+  message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), value);
+  // @@protoc_insertion_point(field_set:helloworld.HelloReply.message)
+}
+inline void HelloReply::set_message(const char* value) {
+  
+  message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:helloworld.HelloReply.message)
+}
+inline void HelloReply::set_message(const char* value, size_t size) {
+  
+  message_.SetNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:helloworld.HelloReply.message)
+}
+inline ::std::string* HelloReply::mutable_message() {
+  
+  // @@protoc_insertion_point(field_mutable:helloworld.HelloReply.message)
+  return message_.MutableNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline ::std::string* HelloReply::release_message() {
+  
+  return message_.ReleaseNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited());
+}
+inline void HelloReply::set_allocated_message(::std::string* message) {
+  if (message != NULL) {
+    
+  } else {
+    
+  }
+  message_.SetAllocatedNoArena(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), message);
+  // @@protoc_insertion_point(field_set_allocated:helloworld.HelloReply.message)
+}
+
+
+class Greeter final {
+ public:
+  class Stub final : public ::grpc::InternalStub {
+   public:
+    ::grpc::Status sayHello(::grpc::ClientContext* context, const ::helloworld::HelloRequest& request, ::helloworld::HelloReply* response);
+    ::grpc::ClientAsyncResponseReader< ::helloworld::HelloReply>* sayHello(::grpc::ClientContext* context, const ::helloworld::HelloRequest& request, ::grpc::CompletionQueue* cq, void* tag);
+  };
+  static Stub* NewStub(const std::shared_ptr< ::grpc::ChannelInterface>& channel);
+
+  class Service : public ::grpc::SynchronousService {
+   public:
+    Service() : service_(nullptr) {}
+    virtual ~Service();
+    virtual ::grpc::Status sayHello(::grpc::ServerContext* context, const ::helloworld::HelloRequest* request, ::helloworld::HelloReply* response);
+    ::grpc::RpcService* service() override final;
+   private:
+    ::grpc::RpcService* service_;
+  };
+  class AsyncService final : public ::grpc::AsynchronousService {
+   public:
+    explicit AsyncService(::grpc::CompletionQueue* cq);
+    ~AsyncService() {};
+    void RequestsayHello(::grpc::ServerContext* context, ::helloworld::HelloRequest* request, ::grpc::ServerAsyncResponseWriter< ::helloworld::HelloReply>* response, ::grpc::CompletionQueue* cq, void *tag);
+  };
+};
+
+// @@protoc_insertion_point(namespace_scope)
+
+}  // namespace helloworld
+
+#ifndef SWIG
+namespace google {
+namespace protobuf {
+
+
+}  // namespace protobuf
+}  // namespace google
+#endif  // SWIG
+
+// @@protoc_insertion_point(global_scope)
+
+#endif  // PROTOBUF_helloworld_2eproto__INCLUDED