added grpc and utils

etcd/Client.hpp

@@ -157,6 +157,8 @@ namespace etcd
     pplx::task<etcd::Response> send_asyncmodify_if(std::string const & key, std::string const & value, std::string const & old_value);  
     pplx::task<etcd::Response> send_asyncdelete(std::string const & key, bool recursive);
 
+    etcdv3::grpcClient grpcClient;
+    
 
 private:
     pplx::task<Response> removeEntryWithKey(std::string const &entryKey);

src/Client.cpp

@@ -20,7 +20,7 @@ using etcdserverpb::WatchResponse;
 using etcdserverpb::WatchCreateRequest;
 
 etcd::Client::Client(std::string const & address)
-  : client(address)
+  : client(address), grpcClient(address)
 {
   std::string stripped_address(address);
   std::string substr("http://");

v3/include/Utils.hpp

@@ -0,0 +1,15 @@
+#ifndef __UTILS_HPP__
+#define __UTILS_HPP__
+
+#include "v3/include/AsyncRangeResponse.hpp"
+#include "v3/include/grpcClient.hpp"
+
+namespace etcdv3
+{
+  namespace Utils
+  {
+    etcdv3::AsyncRangeResponse* getKey(std::string const & key, etcdv3::grpcClient& client);
+  }
+}
+#endif
+

v3/include/grpcClient.hpp

@@ -0,0 +1,25 @@
+#ifndef __GRPC_CLIENT_HPP__
+#define __GRPC_CLIENT_HPP__
+
+#include <grpc++/grpc++.h>
+#include "proto/rpc.grpc.pb.h"
+#include "v3/include/AsyncRangeResponse.hpp"
+
+
+using grpc::Channel;
+using etcdserverpb::PutRequest;
+using etcdserverpb::RangeRequest;
+using etcdserverpb::KV;
+
+namespace etcdv3
+{
+
+  class grpcClient
+  {
+  public:
+    grpcClient(std::string const & address);
+    std::unique_ptr<KV::Stub> stub_;
+  };
+}
+
+#endif

v3/src/Utils.cpp

@@ -0,0 +1,24 @@
+#include "v3/include/AsyncRangeResponse.hpp"
+#include "proto/rpc.grpc.pb.h"
+using etcdserverpb::RangeRequest;
+
+#include "v3/include/Utils.hpp"
+
+
+etcdv3::AsyncRangeResponse* etcdv3::Utils::getKey(std::string const & key, etcdv3::grpcClient& client)
+{
+  RangeRequest get_request;
+  get_request.set_key(key);
+  etcdv3::AsyncRangeResponse* resp= new etcdv3::AsyncRangeResponse();   
+
+  resp->status = client.stub_->Range(&resp->context, get_request, &resp->reply);
+  
+  if(resp->status.ok())
+  {
+    return resp;
+  }
+  else
+  {
+    throw std::runtime_error(resp->status.error_message());
+  }
+}

v3/src/grpcClient.cpp

@@ -0,0 +1,14 @@
+#include "v3/include/grpcClient.hpp"
+
+etcdv3::grpcClient::grpcClient(std::string const & address)
+{
+  std::string stripped_address(address);
+  std::string substr("http://");
+  std::string::size_type i = stripped_address.find(substr);
+  if(i != std::string::npos)
+  {
+    stripped_address.erase(i,substr.length());
+  }
+  std::shared_ptr<Channel> channel = grpc::CreateChannel(stripped_address, grpc::InsecureChannelCredentials());
+  stub_= KV::NewStub(channel);
+}