diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel.cc
new file mode 100644
index 0000000..7a75291
--- /dev/null
+++ b/src/cpp/client/channel.cc
@@ -0,0 +1,212 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/client/channel.h"
+
+#include <chrono>
+#include <string>
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/time.h>
+
+#include "src/cpp/rpc_method.h"
+#include "src/cpp/proto/proto_utils.h"
+#include "src/cpp/stream/stream_context.h"
+#include "src/cpp/util/time.h"
+#include <grpc++/config.h>
+#include <google/protobuf/message.h>
+#include <grpc++/client_context.h>
+#include <grpc++/status.h>
+
+namespace grpc {
+
+Channel::Channel(const grpc::string& target) : target_(target) {
+  c_channel_ = grpc_channel_create(target_.c_str(), nullptr);
+}
+
+Channel::~Channel() { grpc_channel_destroy(c_channel_); }
+
+namespace {
+// Poll one event from the compeletion queue. Return false when an error
+// occured or the polled type is not expected. If a finished event has been
+// polled, set finished and set status if it has not been set.
+bool NextEvent(grpc_completion_queue* cq, grpc_completion_type expected_type,
+               bool* finished, bool* status_set, Status* status,
+               google::protobuf::Message* result) {
+  // We rely on the c layer to enforce deadline and thus do not use deadline
+  // here.
+  grpc_event* ev = grpc_completion_queue_next(cq, gpr_inf_future);
+  if (!ev) {
+    return false;
+  }
+  bool ret = ev->type == expected_type;
+  switch (ev->type) {
+    case GRPC_INVOKE_ACCEPTED:
+      ret = ret && (ev->data.invoke_accepted == GRPC_OP_OK);
+      break;
+    case GRPC_READ:
+      ret = ret && (ev->data.read != nullptr);
+      if (ret && !DeserializeProto(ev->data.read, result)) {
+        *status_set = true;
+        *status =
+            Status(StatusCode::DATA_LOSS, "Failed to parse response proto.");
+        ret = false;
+      }
+      break;
+    case GRPC_WRITE_ACCEPTED:
+      ret = ret && (ev->data.write_accepted == GRPC_OP_OK);
+      break;
+    case GRPC_FINISH_ACCEPTED:
+      ret = ret && (ev->data.finish_accepted == GRPC_OP_OK);
+      break;
+    case GRPC_CLIENT_METADATA_READ:
+      break;
+    case GRPC_FINISHED:
+      *finished = true;
+      if (!*status_set) {
+        *status_set = true;
+        StatusCode error_code = static_cast<StatusCode>(ev->data.finished.code);
+        grpc::string details(
+            ev->data.finished.details ? ev->data.finished.details : "");
+        *status = Status(error_code, details);
+      }
+      break;
+    default:
+      gpr_log(GPR_ERROR, "Dropping unhandled event with type %d", ev->type);
+      break;
+  }
+  grpc_event_finish(ev);
+  return ret;
+}
+
+// If finished is not true, get final status by polling until a finished
+// event is obtained.
+void GetFinalStatus(grpc_completion_queue* cq, bool status_set, bool finished,
+                    Status* status) {
+  while (!finished) {
+    NextEvent(cq, GRPC_FINISHED, &finished, &status_set, status, nullptr);
+  }
+}
+
+}  // namespace
+
+// TODO(yangg) more error handling
+Status Channel::StartBlockingRpc(const RpcMethod& method,
+                                 ClientContext* context,
+                                 const google::protobuf::Message& request,
+                                 google::protobuf::Message* result) {
+  Status status;
+  bool status_set = false;
+  bool finished = false;
+  gpr_timespec absolute_deadline;
+  AbsoluteDeadlineTimepoint2Timespec(context->absolute_deadline(),
+                                     &absolute_deadline);
+  grpc_call* call = grpc_channel_create_call(c_channel_, method.name(),
+                                             // FIXME(yangg)
+                                             "localhost", absolute_deadline);
+  context->set_call(call);
+  grpc_completion_queue* cq = grpc_completion_queue_create();
+  context->set_cq(cq);
+  // add_metadata from context
+  //
+  // invoke
+  GPR_ASSERT(grpc_call_start_invoke(call, cq, call, call, call,
+                                    GRPC_WRITE_BUFFER_HINT) == GRPC_CALL_OK);
+  if (!NextEvent(cq, GRPC_INVOKE_ACCEPTED, &status_set, &finished, &status,
+                 nullptr)) {
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  // write request
+  grpc_byte_buffer* write_buffer = nullptr;
+  bool success = SerializeProto(request, &write_buffer);
+  if (!success) {
+    grpc_call_cancel(call);
+    status_set = true;
+    status =
+        Status(StatusCode::DATA_LOSS, "Failed to serialize request proto.");
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  GPR_ASSERT(grpc_call_start_write(call, write_buffer, call,
+                                   GRPC_WRITE_BUFFER_HINT) == GRPC_CALL_OK);
+  grpc_byte_buffer_destroy(write_buffer);
+  if (!NextEvent(cq, GRPC_WRITE_ACCEPTED, &finished, &status_set, &status,
+                 nullptr)) {
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  // writes done
+  GPR_ASSERT(grpc_call_writes_done(call, call) == GRPC_CALL_OK);
+  if (!NextEvent(cq, GRPC_FINISH_ACCEPTED, &finished, &status_set, &status,
+                 nullptr)) {
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  // start read metadata
+  //
+  if (!NextEvent(cq, GRPC_CLIENT_METADATA_READ, &finished, &status_set, &status,
+                 nullptr)) {
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  // start read
+  GPR_ASSERT(grpc_call_start_read(call, call) == GRPC_CALL_OK);
+  if (!NextEvent(cq, GRPC_READ, &finished, &status_set, &status, result)) {
+    GetFinalStatus(cq, finished, status_set, &status);
+    return status;
+  }
+  // wait status
+  GetFinalStatus(cq, finished, status_set, &status);
+  return status;
+}
+
+StreamContextInterface* Channel::CreateStream(const RpcMethod& method,
+                                              ClientContext* context,
+                                              const google::protobuf::Message* request,
+                                              google::protobuf::Message* result) {
+  gpr_timespec absolute_deadline;
+  AbsoluteDeadlineTimepoint2Timespec(context->absolute_deadline(),
+                                     &absolute_deadline);
+  grpc_call* call = grpc_channel_create_call(c_channel_, method.name(),
+                                             // FIXME(yangg)
+                                             "localhost", absolute_deadline);
+  context->set_call(call);
+  grpc_completion_queue* cq = grpc_completion_queue_create();
+  context->set_cq(cq);
+  return new StreamContext(method, context, request, result);
+}
+
+}  // namespace grpc
diff --git a/src/cpp/client/channel.h b/src/cpp/client/channel.h
new file mode 100644
index 0000000..a97d35e
--- /dev/null
+++ b/src/cpp/client/channel.h
@@ -0,0 +1,71 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_CLIENT_CHANNEL_H__
+#define __GRPCPP_INTERNAL_CLIENT_CHANNEL_H__
+
+#include <grpc++/channel_interface.h>
+#include <grpc++/config.h>
+
+struct grpc_channel;
+
+namespace grpc {
+class StreamContextInterface;
+
+class Channel : public ChannelInterface {
+ public:
+  explicit Channel(const grpc::string& target);
+  ~Channel() override;
+
+  Status StartBlockingRpc(const RpcMethod& method, ClientContext* context,
+                          const google::protobuf::Message& request,
+                          google::protobuf::Message* result) override;
+
+  StreamContextInterface* CreateStream(const RpcMethod& method,
+                                       ClientContext* context,
+                                       const google::protobuf::Message* request,
+                                       google::protobuf::Message* result) override;
+
+ protected:
+  // TODO(yangg) remove this section when we have the general ssl channel API
+  Channel() {}
+  void set_c_channel(grpc_channel* channel) { c_channel_ = channel; }
+
+ private:
+  const grpc::string target_;
+  grpc_channel* c_channel_;  // owned
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_CLIENT_CHANNEL_H__
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
new file mode 100644
index 0000000..78774a7
--- /dev/null
+++ b/src/cpp/client/client_context.cc
@@ -0,0 +1,73 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/client_context.h>
+
+#include <grpc/grpc.h>
+
+using std::chrono::system_clock;
+
+namespace grpc {
+
+ClientContext::ClientContext()
+    : call_(nullptr),
+      cq_(nullptr),
+      absolute_deadline_(system_clock::time_point::max()) {}
+
+ClientContext::~ClientContext() {
+  if (call_) {
+    grpc_call_destroy(call_);
+  }
+  if (cq_) {
+    grpc_completion_queue_shutdown(cq_);
+    grpc_completion_queue_destroy(cq_);
+  }
+}
+
+void ClientContext::set_absolute_deadline(
+    const system_clock::time_point& deadline) {
+  absolute_deadline_ = deadline;
+}
+
+system_clock::time_point ClientContext::absolute_deadline() {
+  return absolute_deadline_;
+}
+
+void ClientContext::AddMetadata(const grpc::string& meta_key,
+                                const grpc::string& meta_value) {
+  return;
+}
+
+void ClientContext::StartCancel() {}
+
+}  // namespace grpc
diff --git a/src/cpp/client/create_channel.cc b/src/cpp/client/create_channel.cc
new file mode 100644
index 0000000..ea2b6a7
--- /dev/null
+++ b/src/cpp/client/create_channel.cc
@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright 2014, 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 <memory>
+#include <string>
+
+#include "src/cpp/client/channel.h"
+#include <grpc++/channel_interface.h>
+#include <grpc++/create_channel.h>
+
+namespace grpc {
+
+std::shared_ptr<ChannelInterface> CreateChannel(const grpc::string& target) {
+  return std::shared_ptr<ChannelInterface>(new Channel(target));
+}
+
+}  // namespace grpc
diff --git a/src/cpp/client/credentials.cc b/src/cpp/client/credentials.cc
new file mode 100644
index 0000000..18fa4fa
--- /dev/null
+++ b/src/cpp/client/credentials.cc
@@ -0,0 +1,90 @@
+/*
+ *
+ * Copyright 2014, 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 <string>
+
+#include <grpc/grpc_security.h>
+
+#include <grpc++/credentials.h>
+
+namespace grpc {
+
+Credentials::Credentials(grpc_credentials* c_creds) : creds_(c_creds) {}
+
+Credentials::~Credentials() { grpc_credentials_release(creds_); }
+grpc_credentials* Credentials::GetRawCreds() { return creds_; }
+
+std::unique_ptr<Credentials> CredentialsFactory::DefaultCredentials() {
+  grpc_credentials* c_creds = grpc_default_credentials_create();
+  std::unique_ptr<Credentials> cpp_creds(new Credentials(c_creds));
+  return cpp_creds;
+}
+
+// Builds SSL Credentials given SSL specific options
+std::unique_ptr<Credentials> CredentialsFactory::SslCredentials(
+    const SslCredentialsOptions& options) {
+  grpc_credentials* c_creds = grpc_ssl_credentials_create(
+      reinterpret_cast<const unsigned char*>(options.pem_root_certs.c_str()),
+      options.pem_root_certs.size(),
+      reinterpret_cast<const unsigned char*>(options.pem_private_key.c_str()),
+      options.pem_private_key.size(),
+      reinterpret_cast<const unsigned char*>(options.pem_cert_chain.c_str()),
+      options.pem_cert_chain.size());
+  std::unique_ptr<Credentials> cpp_creds(new Credentials(c_creds));
+  return cpp_creds;
+}
+
+// Builds credentials for use when running in GCE
+std::unique_ptr<Credentials> CredentialsFactory::ComputeEngineCredentials() {
+  grpc_credentials* c_creds = grpc_compute_engine_credentials_create();
+  std::unique_ptr<Credentials> cpp_creds(new Credentials(c_creds));
+  return cpp_creds;
+}
+
+
+// Combines two credentials objects into a composite credentials.
+std::unique_ptr<Credentials> CredentialsFactory::ComposeCredentials(
+    const std::unique_ptr<Credentials>& creds1,
+    const std::unique_ptr<Credentials>& creds2) {
+  // Note that we are not saving unique_ptrs to the two credentials
+  // passed in here. This is OK because the underlying C objects (i.e.,
+  // creds1 and creds2) into grpc_composite_credentials_create will see their
+  // refcounts incremented.
+  grpc_credentials* c_creds = grpc_composite_credentials_create(
+      creds1->GetRawCreds(), creds2->GetRawCreds());
+  std::unique_ptr<Credentials> cpp_creds(new Credentials(c_creds));
+  return cpp_creds;
+}
+
+}  // namespace grpc
diff --git a/src/cpp/client/internal_stub.cc b/src/cpp/client/internal_stub.cc
new file mode 100644
index 0000000..ec88ba5
--- /dev/null
+++ b/src/cpp/client/internal_stub.cc
@@ -0,0 +1,36 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/client/internal_stub.h"
+
+namespace grpc {}  // namespace grpc
diff --git a/src/cpp/client/internal_stub.h b/src/cpp/client/internal_stub.h
new file mode 100644
index 0000000..0eaa717
--- /dev/null
+++ b/src/cpp/client/internal_stub.h
@@ -0,0 +1,60 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_CLIENT_INTERNAL_STUB_H__
+#define __GRPCPP_INTERNAL_CLIENT_INTERNAL_STUB_H__
+
+#include <memory>
+
+#include <grpc++/channel_interface.h>
+
+namespace grpc {
+
+class InternalStub {
+ public:
+  InternalStub() {}
+  virtual ~InternalStub() {}
+
+  void set_channel(const std::shared_ptr<ChannelInterface>& channel) {
+    channel_ = channel;
+  }
+
+  ChannelInterface* channel() { return channel_.get(); }
+
+ private:
+  std::shared_ptr<ChannelInterface> channel_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_CLIENT_INTERNAL_STUB_H__
diff --git a/src/cpp/proto/proto_utils.cc b/src/cpp/proto/proto_utils.cc
new file mode 100644
index 0000000..255d146
--- /dev/null
+++ b/src/cpp/proto/proto_utils.cc
@@ -0,0 +1,71 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/proto/proto_utils.h"
+#include <grpc++/config.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/slice.h>
+#include <google/protobuf/message.h>
+
+namespace grpc {
+
+bool SerializeProto(const google::protobuf::Message& msg, grpc_byte_buffer** bp) {
+  grpc::string msg_str;
+  bool success = msg.SerializeToString(&msg_str);
+  if (success) {
+    gpr_slice slice =
+        gpr_slice_from_copied_buffer(msg_str.data(), msg_str.length());
+    *bp = grpc_byte_buffer_create(&slice, 1);
+    gpr_slice_unref(slice);
+  }
+  return success;
+}
+
+bool DeserializeProto(grpc_byte_buffer* buffer, google::protobuf::Message* msg) {
+  grpc::string msg_string;
+  grpc_byte_buffer_reader* reader = grpc_byte_buffer_reader_create(buffer);
+  gpr_slice slice;
+  while (grpc_byte_buffer_reader_next(reader, &slice)) {
+    const char* data = reinterpret_cast<const char*>(
+        slice.refcount ? slice.data.refcounted.bytes
+                       : slice.data.inlined.bytes);
+    msg_string.append(data, slice.refcount ? slice.data.refcounted.length
+                                           : slice.data.inlined.length);
+    gpr_slice_unref(slice);
+  }
+  grpc_byte_buffer_reader_destroy(reader);
+  return msg->ParseFromString(msg_string);
+}
+
+}  // namespace grpc
diff --git a/src/cpp/proto/proto_utils.h b/src/cpp/proto/proto_utils.h
new file mode 100644
index 0000000..11471f1
--- /dev/null
+++ b/src/cpp/proto/proto_utils.h
@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_PROTO_PROTO_UTILS_H__
+#define __GRPCPP_INTERNAL_PROTO_PROTO_UTILS_H__
+
+struct grpc_byte_buffer;
+namespace google {
+namespace protobuf {
+class Message;
+}
+}
+
+namespace grpc {
+
+// Serialize the msg into a buffer created inside the function. The caller
+// should destroy the returned buffer when done with it. If serialization fails,
+// false is returned and buffer is left unchanged.
+bool SerializeProto(const google::protobuf::Message& msg, grpc_byte_buffer** buffer);
+
+// The caller keeps ownership of buffer and msg.
+bool DeserializeProto(grpc_byte_buffer* buffer, google::protobuf::Message* msg);
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_PROTO_PROTO_UTILS_H__
diff --git a/src/cpp/rpc_method.cc b/src/cpp/rpc_method.cc
new file mode 100644
index 0000000..8067f42
--- /dev/null
+++ b/src/cpp/rpc_method.cc
@@ -0,0 +1,36 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/rpc_method.h"
+
+namespace grpc {}  // namespace grpc
diff --git a/src/cpp/rpc_method.h b/src/cpp/rpc_method.h
new file mode 100644
index 0000000..24a34be
--- /dev/null
+++ b/src/cpp/rpc_method.h
@@ -0,0 +1,69 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_RPC_METHOD_H__
+#define __GRPCPP_INTERNAL_RPC_METHOD_H__
+
+namespace google {
+namespace protobuf {
+class Message;
+}
+}
+
+namespace grpc {
+
+class RpcMethod {
+ public:
+  enum RpcType {
+    NORMAL_RPC = 0,
+    CLIENT_STREAMING,  // request streaming
+    SERVER_STREAMING,  // response streaming
+    BIDI_STREAMING
+  };
+
+  explicit RpcMethod(const char* name)
+      : name_(name), method_type_(NORMAL_RPC) {}
+  RpcMethod(const char* name, RpcType type) : name_(name), method_type_(type) {}
+
+  const char *name() const { return name_; }
+
+  RpcType method_type() const { return method_type_; }
+
+ private:
+  const char *name_;
+  const RpcType method_type_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_RPC_METHOD_H__
diff --git a/src/cpp/server/async_server.cc b/src/cpp/server/async_server.cc
new file mode 100644
index 0000000..aae2c82
--- /dev/null
+++ b/src/cpp/server/async_server.cc
@@ -0,0 +1,89 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/async_server.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include <grpc++/completion_queue.h>
+
+namespace grpc {
+
+AsyncServer::AsyncServer(CompletionQueue* cc)
+    : started_(false), shutdown_(false) {
+  server_ = grpc_server_create(cc->cq(), nullptr);
+}
+
+AsyncServer::~AsyncServer() {
+  std::unique_lock<std::mutex> lock(shutdown_mu_);
+  if (started_ && !shutdown_) {
+    lock.unlock();
+    Shutdown();
+  }
+  grpc_server_destroy(server_);
+}
+
+void AsyncServer::AddPort(const grpc::string& addr) {
+  GPR_ASSERT(!started_);
+  int success = grpc_server_add_http2_port(server_, addr.c_str());
+  GPR_ASSERT(success);
+}
+
+void AsyncServer::Start() {
+  GPR_ASSERT(!started_);
+  started_ = true;
+  grpc_server_start(server_);
+}
+
+void AsyncServer::RequestOneRpc() {
+  GPR_ASSERT(started_);
+  std::unique_lock<std::mutex> lock(shutdown_mu_);
+  if (shutdown_) {
+    return;
+  }
+  lock.unlock();
+  grpc_call_error err = grpc_server_request_call(server_, nullptr);
+  GPR_ASSERT(err == GRPC_CALL_OK);
+}
+
+void AsyncServer::Shutdown() {
+  std::unique_lock<std::mutex> lock(shutdown_mu_);
+  if (started_ && !shutdown_) {
+    shutdown_ = true;
+    lock.unlock();
+    // TODO(yangg) should we shutdown without start?
+    grpc_server_shutdown(server_);
+  }
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/async_server_context.cc b/src/cpp/server/async_server_context.cc
new file mode 100644
index 0000000..b231f4b
--- /dev/null
+++ b/src/cpp/server/async_server_context.cc
@@ -0,0 +1,101 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/async_server_context.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include "src/cpp/proto/proto_utils.h"
+#include <google/protobuf/message.h>
+#include <grpc++/status.h>
+
+namespace grpc {
+
+AsyncServerContext::AsyncServerContext(
+    grpc_call* call, const grpc::string& method, const grpc::string& host,
+    system_clock::time_point absolute_deadline)
+    : method_(method),
+      host_(host),
+      absolute_deadline_(absolute_deadline),
+      request_(nullptr),
+      call_(call) {
+}
+
+AsyncServerContext::~AsyncServerContext() { grpc_call_destroy(call_); }
+
+void AsyncServerContext::Accept(grpc_completion_queue* cq) {
+  grpc_call_accept(call_, cq, this, 0);
+}
+
+bool AsyncServerContext::StartRead(google::protobuf::Message* request) {
+  GPR_ASSERT(request);
+  request_ = request;
+  grpc_call_error err = grpc_call_start_read(call_, this);
+  return err == GRPC_CALL_OK;
+}
+
+bool AsyncServerContext::StartWrite(const google::protobuf::Message& response,
+                                    int flags) {
+  grpc_byte_buffer* buffer = nullptr;
+  if (!SerializeProto(response, &buffer)) {
+    return false;
+  }
+  grpc_call_error err = grpc_call_start_write(call_, buffer, this, flags);
+  grpc_byte_buffer_destroy(buffer);
+  return err == GRPC_CALL_OK;
+}
+
+namespace {
+grpc_status TranslateStatus(const Status& status) {
+  grpc_status c_status;
+  // TODO(yangg)
+  c_status.code = GRPC_STATUS_OK;
+  c_status.details = nullptr;
+  return c_status;
+}
+}  // namespace
+
+bool AsyncServerContext::StartWriteStatus(const Status& status) {
+  grpc_status c_status = TranslateStatus(status);
+  grpc_call_error err = grpc_call_start_write_status(call_, c_status, this);
+  return err == GRPC_CALL_OK;
+}
+
+bool AsyncServerContext::ParseRead(grpc_byte_buffer* read_buffer) {
+  GPR_ASSERT(request_);
+  bool success = DeserializeProto(read_buffer, request_);
+  request_ = nullptr;
+  return success;
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/completion_queue.cc b/src/cpp/server/completion_queue.cc
new file mode 100644
index 0000000..04eb301
--- /dev/null
+++ b/src/cpp/server/completion_queue.cc
@@ -0,0 +1,113 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+// TODO(yangg) maybe move to internal/common
+#include <grpc++/completion_queue.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include "src/cpp/util/time.h"
+#include <grpc++/async_server_context.h>
+
+namespace grpc {
+
+CompletionQueue::CompletionQueue() { cq_ = grpc_completion_queue_create(); }
+
+CompletionQueue::~CompletionQueue() { grpc_completion_queue_destroy(cq_); }
+
+void CompletionQueue::Shutdown() { grpc_completion_queue_shutdown(cq_); }
+
+CompletionQueue::CompletionType CompletionQueue::Next(void** tag) {
+  grpc_event* ev;
+  CompletionType return_type;
+  bool success;
+
+  ev = grpc_completion_queue_next(cq_, gpr_inf_future);
+  if (!ev) {
+    gpr_log(GPR_ERROR, "no next event in queue");
+    abort();
+  }
+  switch (ev->type) {
+    case GRPC_QUEUE_SHUTDOWN:
+      return_type = QUEUE_CLOSED;
+      break;
+    case GRPC_READ:
+      *tag = ev->tag;
+      if (ev->data.read) {
+        success =
+            static_cast<AsyncServerContext*>(ev->tag)->ParseRead(ev->data.read);
+        return_type = success ? SERVER_READ_OK : SERVER_READ_ERROR;
+      } else {
+        return_type = SERVER_READ_ERROR;
+      }
+      break;
+    case GRPC_WRITE_ACCEPTED:
+      *tag = ev->tag;
+      if (ev->data.write_accepted != GRPC_OP_ERROR) {
+        return_type = SERVER_WRITE_OK;
+      } else {
+        return_type = SERVER_WRITE_ERROR;
+      }
+      break;
+    case GRPC_SERVER_RPC_NEW:
+      GPR_ASSERT(!ev->tag);
+      // Finishing the pending new rpcs after the server has been shutdown.
+      if (!ev->call) {
+        *tag = nullptr;
+      } else {
+        *tag = new AsyncServerContext(ev->call, ev->data.server_rpc_new.method,
+                                      ev->data.server_rpc_new.host,
+                                      AbsoluteDeadlineTimespec2Timepoint(
+                                          ev->data.server_rpc_new.deadline));
+      }
+      return_type = SERVER_RPC_NEW;
+      break;
+    case GRPC_FINISHED:
+      *tag = ev->tag;
+      return_type = RPC_END;
+      break;
+    case GRPC_FINISH_ACCEPTED:
+      *tag = ev->tag;
+      return_type = HALFCLOSE_OK;
+      break;
+    default:
+      // We do not handle client side messages now
+      gpr_log(GPR_ERROR, "client-side messages aren't supported yet");
+      abort();
+  }
+  grpc_event_finish(ev);
+  return return_type;
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/rpc_service_method.h b/src/cpp/server/rpc_service_method.h
new file mode 100644
index 0000000..ac2badd
--- /dev/null
+++ b/src/cpp/server/rpc_service_method.h
@@ -0,0 +1,131 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_SERVER_RPC_SERVICE_METHOD_H__
+#define __GRPCPP_INTERNAL_SERVER_RPC_SERVICE_METHOD_H__
+
+#include <functional>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "src/cpp/rpc_method.h"
+#include <google/protobuf/message.h>
+#include <grpc++/status.h>
+
+namespace grpc {
+
+// TODO(rocking): we might need to split this file into multiple ones.
+
+// Base class for running an RPC handler.
+class MethodHandler {
+ public:
+  virtual ~MethodHandler() {}
+  struct HandlerParameter {
+    HandlerParameter(const google::protobuf::Message* req, google::protobuf::Message* resp)
+        : request(req), response(resp) {}
+    const google::protobuf::Message* request;
+    google::protobuf::Message* response;
+  };
+  virtual ::grpc::Status RunHandler(const HandlerParameter& param) = 0;
+};
+
+// A wrapper class of an application provided rpc method handler.
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler : public MethodHandler {
+ public:
+  RpcMethodHandler(std::function<::grpc::Status(
+                       ServiceType*, const RequestType*, ResponseType*)> func,
+                   ServiceType* service)
+      : func_(func), service_(service) {}
+
+  ::grpc::Status RunHandler(const HandlerParameter& param) final {
+    // Invoke application function, cast proto messages to their actual types.
+    return func_(service_, dynamic_cast<const RequestType*>(param.request),
+                 dynamic_cast<ResponseType*>(param.response));
+  }
+
+ private:
+  // Application provided rpc handler function.
+  std::function<::grpc::Status(ServiceType*, const RequestType*, ResponseType*)>
+      func_;
+  // The class the above handler function lives in.
+  ServiceType* service_;
+};
+
+// Server side rpc method class
+class RpcServiceMethod : public RpcMethod {
+ public:
+  // Takes ownership of the handler and two prototype objects.
+  RpcServiceMethod(const char* name, MethodHandler* handler,
+                   google::protobuf::Message* request_prototype,
+                   google::protobuf::Message* response_prototype)
+      : RpcMethod(name),
+        handler_(handler),
+        request_prototype_(request_prototype),
+        response_prototype_(response_prototype) {}
+
+  MethodHandler* handler() { return handler_.get(); }
+
+  google::protobuf::Message* AllocateRequestProto() { return request_prototype_->New(); }
+  google::protobuf::Message* AllocateResponseProto() {
+    return response_prototype_->New();
+  }
+
+ private:
+  std::unique_ptr<MethodHandler> handler_;
+  std::unique_ptr<google::protobuf::Message> request_prototype_;
+  std::unique_ptr<google::protobuf::Message> response_prototype_;
+};
+
+// This class contains all the method information for an rpc service. It is
+// used for registering a service on a grpc server.
+class RpcService {
+ public:
+  // Takes ownership.
+  void AddMethod(RpcServiceMethod* method) {
+    methods_.push_back(std::unique_ptr<RpcServiceMethod>(method));
+  }
+
+  RpcServiceMethod* GetMethod(int i) {
+    return methods_[i].get();
+  }
+  int GetMethodCount() const { return methods_.size(); }
+
+ private:
+  std::vector<std::unique_ptr<RpcServiceMethod>> methods_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_SERVER_RPC_SERVICE_METHOD_H__
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
new file mode 100644
index 0000000..9bf4073
--- /dev/null
+++ b/src/cpp/server/server.cc
@@ -0,0 +1,166 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/server.h>
+#include <utility>
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include "src/cpp/server/rpc_service_method.h"
+#include "src/cpp/server/server_rpc_handler.h"
+#include "src/cpp/server/thread_pool.h"
+#include <grpc++/async_server_context.h>
+#include <grpc++/completion_queue.h>
+
+namespace grpc {
+
+// TODO(rocking): consider a better default value like num of cores.
+static const int kNumThreads = 4;
+
+Server::Server(ThreadPoolInterface* thread_pool)
+    : started_(false),
+      shutdown_(false),
+      num_running_cb_(0),
+      thread_pool_(thread_pool == nullptr ? new ThreadPool(kNumThreads)
+                                          : thread_pool),
+      thread_pool_owned_(thread_pool == nullptr) {
+  server_ = grpc_server_create(cq_.cq(), nullptr);
+}
+
+Server::Server() {
+  // Should not be called.
+  GPR_ASSERT(false);
+}
+
+Server::~Server() {
+  std::unique_lock<std::mutex> lock(mu_);
+  if (started_ && !shutdown_) {
+    lock.unlock();
+    Shutdown();
+  }
+  grpc_server_destroy(server_);
+  if (thread_pool_owned_) {
+    delete thread_pool_;
+  }
+}
+
+void Server::RegisterService(RpcService* service) {
+  for (int i = 0; i < service->GetMethodCount(); ++i) {
+    RpcServiceMethod* method = service->GetMethod(i);
+    method_map_.insert(std::make_pair(method->name(), method));
+  }
+}
+
+void Server::AddPort(const grpc::string& addr) {
+  GPR_ASSERT(!started_);
+  int success = grpc_server_add_http2_port(server_, addr.c_str());
+  GPR_ASSERT(success);
+}
+
+void Server::Start() {
+  GPR_ASSERT(!started_);
+  started_ = true;
+  grpc_server_start(server_);
+
+  // Start processing rpcs.
+  ScheduleCallback();
+}
+
+void Server::AllowOneRpc() {
+  GPR_ASSERT(started_);
+  grpc_call_error err = grpc_server_request_call(server_, nullptr);
+  GPR_ASSERT(err == GRPC_CALL_OK);
+}
+
+void Server::Shutdown() {
+  {
+    std::unique_lock<std::mutex> lock(mu_);
+    if (started_ && !shutdown_) {
+      shutdown_ = true;
+      grpc_server_shutdown(server_);
+
+      // Wait for running callbacks to finish.
+      while (num_running_cb_ != 0) {
+        callback_cv_.wait(lock);
+      }
+    }
+  }
+
+  // Shutdown the completion queue.
+  cq_.Shutdown();
+  void* tag = nullptr;
+  CompletionQueue::CompletionType t = cq_.Next(&tag);
+  GPR_ASSERT(t == CompletionQueue::QUEUE_CLOSED);
+}
+
+void Server::ScheduleCallback() {
+  {
+    std::unique_lock<std::mutex> lock(mu_);
+    num_running_cb_++;
+  }
+  std::function<void()> callback = std::bind(&Server::RunRpc, this);
+  thread_pool_->ScheduleCallback(callback);
+}
+
+void Server::RunRpc() {
+  // Wait for one more incoming rpc.
+  void* tag = nullptr;
+  AllowOneRpc();
+  CompletionQueue::CompletionType t = cq_.Next(&tag);
+  GPR_ASSERT(t == CompletionQueue::SERVER_RPC_NEW);
+
+  AsyncServerContext* server_context = static_cast<AsyncServerContext*>(tag);
+  // server_context could be nullptr during server shutdown.
+  if (server_context != nullptr) {
+    // Schedule a new callback to handle more rpcs.
+    ScheduleCallback();
+
+    RpcServiceMethod* method = nullptr;
+    auto iter = method_map_.find(server_context->method());
+    if (iter != method_map_.end()) {
+      method = iter->second;
+    }
+    ServerRpcHandler rpc_handler(server_context, method);
+    rpc_handler.StartRpc();
+  }
+
+  {
+    std::unique_lock<std::mutex> lock(mu_);
+    num_running_cb_--;
+    if (shutdown_) {
+      callback_cv_.notify_all();
+    }
+  }
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
new file mode 100644
index 0000000..d5d0689
--- /dev/null
+++ b/src/cpp/server/server_builder.cc
@@ -0,0 +1,66 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/server_builder.h>
+
+#include <grpc++/server.h>
+
+namespace grpc {
+
+ServerBuilder::ServerBuilder() : thread_pool_(nullptr) {}
+
+void ServerBuilder::RegisterService(RpcService* service) {
+  services_.push_back(service);
+}
+
+void ServerBuilder::AddPort(const grpc::string& addr) {
+  ports_.push_back(addr);
+}
+
+void ServerBuilder::SetThreadPool(ThreadPoolInterface* thread_pool) {
+  thread_pool_ = thread_pool;
+}
+
+std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
+  std::unique_ptr<Server> server(new Server(thread_pool_));
+  for (auto* service : services_) {
+    server->RegisterService(service);
+  }
+  for (auto& port : ports_) {
+    server->AddPort(port);
+  }
+  server->Start();
+  return server;
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/server_rpc_handler.cc b/src/cpp/server/server_rpc_handler.cc
new file mode 100644
index 0000000..2d5a081
--- /dev/null
+++ b/src/cpp/server/server_rpc_handler.cc
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/server/server_rpc_handler.h"
+
+#include <grpc/support/log.h>
+#include "src/cpp/server/rpc_service_method.h"
+#include <grpc++/async_server_context.h>
+
+namespace grpc {
+
+ServerRpcHandler::ServerRpcHandler(AsyncServerContext* server_context,
+                                   RpcServiceMethod* method)
+    : server_context_(server_context),
+      method_(method) {
+}
+
+void ServerRpcHandler::StartRpc() {
+  // Start the rpc on this dedicated completion queue.
+  server_context_->Accept(cq_.cq());
+
+  if (method_ == nullptr) {
+    // Method not supported, finish the rpc with error.
+    // TODO(rocking): do we need to call read to consume the request?
+    FinishRpc(Status(StatusCode::UNIMPLEMENTED, "No such method."));
+    return;
+  }
+
+  // Allocate request and response.
+  std::unique_ptr<google::protobuf::Message> request(method_->AllocateRequestProto());
+  std::unique_ptr<google::protobuf::Message> response(method_->AllocateResponseProto());
+
+  // Read request
+  server_context_->StartRead(request.get());
+  auto type = WaitForNextEvent();
+  GPR_ASSERT(type == CompletionQueue::SERVER_READ_OK);
+
+  // Run the application's rpc handler
+  MethodHandler* handler = method_->handler();
+  Status status = handler->RunHandler(
+      MethodHandler::HandlerParameter(request.get(), response.get()));
+
+  if (status.IsOk()) {
+    // Send the response if we get an ok status.
+    server_context_->StartWrite(*response, 0);
+    type = WaitForNextEvent();
+    if (type != CompletionQueue::SERVER_WRITE_OK) {
+      status = Status(StatusCode::INTERNAL, "Error writing response.");
+    }
+  }
+
+  FinishRpc(status);
+}
+
+CompletionQueue::CompletionType ServerRpcHandler::WaitForNextEvent() {
+  void* tag = nullptr;
+  CompletionQueue::CompletionType type = cq_.Next(&tag);
+  if (type != CompletionQueue::QUEUE_CLOSED &&
+      type != CompletionQueue::RPC_END) {
+    GPR_ASSERT(static_cast<AsyncServerContext*>(tag) == server_context_.get());
+  }
+  return type;
+}
+
+void ServerRpcHandler::FinishRpc(const Status& status) {
+  server_context_->StartWriteStatus(status);
+  CompletionQueue::CompletionType type = WaitForNextEvent();
+  // TODO(rocking): do we care about this return type?
+
+  type = WaitForNextEvent();
+  GPR_ASSERT(type == CompletionQueue::RPC_END);
+
+  cq_.Shutdown();
+  type = WaitForNextEvent();
+  GPR_ASSERT(type == CompletionQueue::QUEUE_CLOSED);
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/server_rpc_handler.h b/src/cpp/server/server_rpc_handler.h
new file mode 100644
index 0000000..ca48fd7
--- /dev/null
+++ b/src/cpp/server/server_rpc_handler.h
@@ -0,0 +1,66 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__
+#define __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__
+
+#include <memory>
+
+#include <grpc++/completion_queue.h>
+#include <grpc++/status.h>
+
+namespace grpc {
+
+class AsyncServerContext;
+class RpcServiceMethod;
+
+class ServerRpcHandler {
+ public:
+  // Takes ownership of server_context.
+  ServerRpcHandler(AsyncServerContext* server_context,
+                   RpcServiceMethod* method);
+
+  void StartRpc();
+
+ private:
+  CompletionQueue::CompletionType WaitForNextEvent();
+  void FinishRpc(const Status& status);
+
+  std::unique_ptr<AsyncServerContext> server_context_;
+  RpcServiceMethod* method_;
+  CompletionQueue cq_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__
diff --git a/src/cpp/server/thread_pool.cc b/src/cpp/server/thread_pool.cc
new file mode 100644
index 0000000..ce364c4
--- /dev/null
+++ b/src/cpp/server/thread_pool.cc
@@ -0,0 +1,77 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/server/thread_pool.h"
+
+namespace grpc {
+
+ThreadPool::ThreadPool(int num_threads) {
+  for (int i = 0; i < num_threads; i++) {
+    threads_.push_back(std::thread([=]() {
+      for (;;) {
+        std::unique_lock<std::mutex> lock(mu_);
+        // Wait until work is available or we are shutting down.
+        cv_.wait(lock, [=]() { return shutdown_ || !callbacks_.empty(); });
+        // Drain callbacks before considering shutdown to ensure all work
+        // gets completed.
+        if (!callbacks_.empty()) {
+          auto cb = callbacks_.front();
+          callbacks_.pop();
+          lock.unlock();
+          cb();
+        } else if (shutdown_) {
+          return;
+        }
+      }
+    }));
+  }
+}
+
+ThreadPool::~ThreadPool() {
+  {
+    std::lock_guard<std::mutex> lock(mu_);
+    shutdown_ = true;
+    cv_.notify_all();
+  }
+  for (auto& t : threads_) {
+    t.join();
+  }
+}
+
+void ThreadPool::ScheduleCallback(const std::function<void()>& callback) {
+  std::lock_guard<std::mutex> lock(mu_);
+  callbacks_.push(callback);
+  cv_.notify_all();
+}
+
+}  // namespace grpc
diff --git a/src/cpp/server/thread_pool.h b/src/cpp/server/thread_pool.h
new file mode 100644
index 0000000..6fc71d6
--- /dev/null
+++ b/src/cpp/server/thread_pool.h
@@ -0,0 +1,64 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_SERVER_THREAD_POOL_H__
+#define __GRPCPP_INTERNAL_SERVER_THREAD_POOL_H__
+
+#include <grpc++/thread_pool_interface.h>
+
+#include <condition_variable>
+#include <thread>
+#include <mutex>
+#include <queue>
+#include <vector>
+
+namespace grpc {
+
+class ThreadPool : public ThreadPoolInterface {
+ public:
+  explicit ThreadPool(int num_threads);
+  ~ThreadPool();
+
+  void ScheduleCallback(const std::function<void()>& callback) final;
+
+ private:
+  std::mutex mu_;
+  std::condition_variable cv_;
+  bool shutdown_ = false;
+  std::queue<std::function<void()>> callbacks_;
+  std::vector<std::thread> threads_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_SERVER_THREAD_POOL_H__
diff --git a/src/cpp/stream/stream_context.cc b/src/cpp/stream/stream_context.cc
new file mode 100644
index 0000000..07e771f
--- /dev/null
+++ b/src/cpp/stream/stream_context.cc
@@ -0,0 +1,276 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/stream/stream_context.h"
+
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include "src/cpp/rpc_method.h"
+#include "src/cpp/proto/proto_utils.h"
+#include "src/cpp/util/time.h"
+#include <grpc++/client_context.h>
+#include <grpc++/config.h>
+#include <google/protobuf/message.h>
+
+namespace grpc {
+
+// Client only ctor
+StreamContext::StreamContext(const RpcMethod& method, ClientContext* context,
+                             const google::protobuf::Message* request,
+                             google::protobuf::Message* result)
+    : is_client_(true),
+      method_(&method),
+      context_(context),
+      request_(request),
+      result_(result),
+      invoke_ev_(nullptr),
+      read_ev_(nullptr),
+      write_ev_(nullptr),
+      reading_(false),
+      writing_(false),
+      got_read_(false),
+      got_write_(false),
+      peer_halfclosed_(false),
+      self_halfclosed_(false),
+      stream_finished_(false),
+      waiting_(false) {
+  GPR_ASSERT(method_->method_type() != RpcMethod::RpcType::NORMAL_RPC);
+}
+
+StreamContext::~StreamContext() { cq_poller_.join(); }
+
+void StreamContext::PollingLoop() {
+  grpc_event* ev = nullptr;
+  gpr_timespec absolute_deadline;
+  AbsoluteDeadlineTimepoint2Timespec(context_->absolute_deadline(),
+                                     &absolute_deadline);
+  std::condition_variable* cv_to_notify = nullptr;
+  std::unique_lock<std::mutex> lock(mu_, std::defer_lock);
+  while (1) {
+    cv_to_notify = nullptr;
+    lock.lock();
+    if (stream_finished_ && !reading_ && !writing_) {
+      return;
+    }
+    lock.unlock();
+    ev = grpc_completion_queue_next(context_->cq(), absolute_deadline);
+    lock.lock();
+    if (!ev) {
+      stream_finished_ = true;
+      final_status_ = Status(StatusCode::DEADLINE_EXCEEDED);
+      std::condition_variable* cvs[3] = {reading_ ? &read_cv_ : nullptr,
+                                         writing_ ? &write_cv_ : nullptr,
+                                         waiting_ ? &finish_cv_ : nullptr};
+      got_read_ = reading_;
+      got_write_ = writing_;
+      read_ev_ = nullptr;
+      write_ev_ = nullptr;
+      lock.unlock();
+      for (int i = 0; i < 3; i++) {
+        if (cvs[i]) cvs[i]->notify_one();
+      }
+      break;
+    }
+    switch (ev->type) {
+      case GRPC_READ:
+        GPR_ASSERT(reading_);
+        got_read_ = true;
+        read_ev_ = ev;
+        cv_to_notify = &read_cv_;
+        reading_ = false;
+        break;
+      case GRPC_FINISH_ACCEPTED:
+      case GRPC_WRITE_ACCEPTED:
+        got_write_ = true;
+        write_ev_ = ev;
+        cv_to_notify = &write_cv_;
+        writing_ = false;
+        break;
+      case GRPC_FINISHED: {
+        grpc::string error_details(
+            ev->data.finished.details ? ev->data.finished.details : "");
+        final_status_ = Status(static_cast<StatusCode>(ev->data.finished.code),
+                               error_details);
+        grpc_event_finish(ev);
+        stream_finished_ = true;
+        if (waiting_) {
+          cv_to_notify = &finish_cv_;
+        }
+        break;
+      }
+      case GRPC_INVOKE_ACCEPTED:
+        invoke_ev_ = ev;
+        cv_to_notify = &invoke_cv_;
+        break;
+      case GRPC_CLIENT_METADATA_READ:
+        grpc_event_finish(ev);
+        break;
+      default:
+        grpc_event_finish(ev);
+        // not handling other types now
+        gpr_log(GPR_ERROR, "unknown event type");
+        abort();
+    }
+    lock.unlock();
+    if (cv_to_notify) {
+      cv_to_notify->notify_one();
+    }
+  }
+}
+
+void StreamContext::Start(bool buffered) {
+  // TODO(yangg) handle metadata send path
+  int flag = buffered ? GRPC_WRITE_BUFFER_HINT : 0;
+  grpc_call_error error = grpc_call_start_invoke(
+      context_->call(), context_->cq(), this, this, this, flag);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+  // kicks off the poller thread
+  cq_poller_ = std::thread(&StreamContext::PollingLoop, this);
+  std::unique_lock<std::mutex> lock(mu_);
+  while (!invoke_ev_) {
+    invoke_cv_.wait(lock);
+  }
+  lock.unlock();
+  GPR_ASSERT(invoke_ev_->data.invoke_accepted == GRPC_OP_OK);
+  grpc_event_finish(invoke_ev_);
+}
+
+namespace {
+// Wait for got_event with event_cv protected by mu, return event.
+grpc_event* WaitForEvent(bool* got_event, std::condition_variable* event_cv,
+                         std::mutex* mu, grpc_event** event) {
+  std::unique_lock<std::mutex> lock(*mu);
+  while (*got_event == false) {
+    event_cv->wait(lock);
+  }
+  *got_event = false;
+  return *event;
+}
+}  // namespace
+
+bool StreamContext::Read(google::protobuf::Message* msg) {
+  std::unique_lock<std::mutex> lock(mu_);
+  if (stream_finished_) {
+    peer_halfclosed_ = true;
+    return false;
+  }
+  reading_ = true;
+  lock.unlock();
+
+  grpc_call_error err = grpc_call_start_read(context_->call(), this);
+  GPR_ASSERT(err == GRPC_CALL_OK);
+
+  grpc_event* ev = WaitForEvent(&got_read_, &read_cv_, &mu_, &read_ev_);
+  if (!ev) {
+    return false;
+  }
+  GPR_ASSERT(ev->type == GRPC_READ);
+  bool ret = true;
+  if (ev->data.read) {
+    if (!DeserializeProto(ev->data.read, msg)) {
+      ret = false;  // parse error
+                    // TODO(yangg) cancel the stream.
+    }
+  } else {
+    ret = false;
+    peer_halfclosed_ = true;
+  }
+  grpc_event_finish(ev);
+  return ret;
+}
+
+bool StreamContext::Write(const google::protobuf::Message* msg, bool is_last) {
+  bool ret = true;
+  grpc_event* ev = nullptr;
+
+  std::unique_lock<std::mutex> lock(mu_);
+  if (stream_finished_) {
+    self_halfclosed_ = true;
+    return false;
+  }
+  writing_ = true;
+  lock.unlock();
+
+  if (msg) {
+    grpc_byte_buffer* out_buf = nullptr;
+    if (!SerializeProto(*msg, &out_buf)) {
+      FinishStream(Status(StatusCode::INVALID_ARGUMENT,
+                          "Failed to serialize request proto"),
+                   true);
+      return false;
+    }
+    int flag = is_last ? GRPC_WRITE_BUFFER_HINT : 0;
+    grpc_call_error err =
+        grpc_call_start_write(context_->call(), out_buf, this, flag);
+    grpc_byte_buffer_destroy(out_buf);
+    GPR_ASSERT(err == GRPC_CALL_OK);
+
+    ev = WaitForEvent(&got_write_, &write_cv_, &mu_, &write_ev_);
+    if (!ev) {
+      return false;
+    }
+    GPR_ASSERT(ev->type == GRPC_WRITE_ACCEPTED);
+
+    ret = ev->data.write_accepted == GRPC_OP_OK;
+    grpc_event_finish(ev);
+  }
+  if (is_last) {
+    grpc_call_error err = grpc_call_writes_done(context_->call(), this);
+    GPR_ASSERT(err == GRPC_CALL_OK);
+    ev = WaitForEvent(&got_write_, &write_cv_, &mu_, &write_ev_);
+    if (!ev) {
+      return false;
+    }
+    GPR_ASSERT(ev->type == GRPC_FINISH_ACCEPTED);
+    grpc_event_finish(ev);
+    self_halfclosed_ = true;
+  }
+  return ret;
+}
+
+const Status& StreamContext::Wait() {
+  std::unique_lock<std::mutex> lock(mu_);
+  // TODO(yangg) if not halfclosed cancel the stream
+  GPR_ASSERT(self_halfclosed_);
+  GPR_ASSERT(peer_halfclosed_);
+  GPR_ASSERT(!waiting_);
+  waiting_ = true;
+  while (!stream_finished_) {
+    finish_cv_.wait(lock);
+  }
+  return final_status_;
+}
+
+void StreamContext::FinishStream(const Status& status, bool send) { return; }
+
+}  // namespace grpc
diff --git a/src/cpp/stream/stream_context.h b/src/cpp/stream/stream_context.h
new file mode 100644
index 0000000..b7f462f
--- /dev/null
+++ b/src/cpp/stream/stream_context.h
@@ -0,0 +1,105 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_STREAM_STREAM_CONTEXT_H__
+#define __GRPCPP_INTERNAL_STREAM_STREAM_CONTEXT_H__
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+
+#include <grpc++/status.h>
+#include <grpc++/stream_context_interface.h>
+
+namespace google {
+namespace protobuf {
+class Message;
+}
+}
+
+struct grpc_event;
+
+namespace grpc {
+class ClientContext;
+class RpcMethod;
+
+class StreamContext : public StreamContextInterface {
+ public:
+  StreamContext(const RpcMethod& method, ClientContext* context,
+                const google::protobuf::Message* request, google::protobuf::Message* result);
+  ~StreamContext();
+  // Start the stream, if there is a final write following immediately, set
+  // buffered so that the messages can be sent in batch.
+  void Start(bool buffered) override;
+  bool Read(google::protobuf::Message* msg) override;
+  bool Write(const google::protobuf::Message* msg, bool is_last) override;
+  const Status& Wait() override;
+  void FinishStream(const Status& status, bool send) override;
+
+  const google::protobuf::Message* request() override { return request_; }
+  google::protobuf::Message* response() override { return result_; }
+
+ private:
+  void PollingLoop();
+  bool BlockingStart();
+  bool is_client_;
+  const RpcMethod* method_;         // not owned
+  ClientContext* context_;          // now owned
+  const google::protobuf::Message* request_;  // not owned
+  google::protobuf::Message* result_;         // not owned
+
+  std::thread cq_poller_;
+  std::mutex mu_;
+  std::condition_variable invoke_cv_;
+  std::condition_variable read_cv_;
+  std::condition_variable write_cv_;
+  std::condition_variable finish_cv_;
+  grpc_event* invoke_ev_;
+  // TODO(yangg) make these two into queues to support concurrent reads and
+  // writes
+  grpc_event* read_ev_;
+  grpc_event* write_ev_;
+  bool reading_;
+  bool writing_;
+  bool got_read_;
+  bool got_write_;
+  bool peer_halfclosed_;
+  bool self_halfclosed_;
+  bool stream_finished_;
+  bool waiting_;
+  Status final_status_;
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_STREAM_STREAM_CONTEXT_H__
diff --git a/src/cpp/util/status.cc b/src/cpp/util/status.cc
new file mode 100644
index 0000000..66be26d
--- /dev/null
+++ b/src/cpp/util/status.cc
@@ -0,0 +1,42 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc++/status.h>
+
+namespace grpc {
+
+const Status& Status::OK = Status();
+const Status& Status::Cancelled = Status(StatusCode::CANCELLED);
+
+}  // namespace grpc
diff --git a/src/cpp/util/time.cc b/src/cpp/util/time.cc
new file mode 100644
index 0000000..207bebf
--- /dev/null
+++ b/src/cpp/util/time.cc
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2014, 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 "src/cpp/util/time.h"
+
+#include <grpc/support/time.h>
+
+using std::chrono::duration_cast;
+using std::chrono::nanoseconds;
+using std::chrono::seconds;
+using std::chrono::system_clock;
+
+namespace grpc {
+
+void AbsoluteDeadlineTimepoint2Timespec(const system_clock::time_point& from,
+                                        gpr_timespec* to) {
+  system_clock::duration deadline = from.time_since_epoch();
+  seconds secs = duration_cast<seconds>(deadline);
+  nanoseconds nsecs = duration_cast<nanoseconds>(deadline - secs);
+  to->tv_sec = secs.count();
+  to->tv_nsec = nsecs.count();
+}
+
+system_clock::time_point AbsoluteDeadlineTimespec2Timepoint(gpr_timespec t) {
+  system_clock::time_point tp;
+  tp += seconds(t.tv_sec);
+  tp += nanoseconds(t.tv_nsec);
+  return tp;
+}
+
+}  // namespace grpc
diff --git a/src/cpp/util/time.h b/src/cpp/util/time.h
new file mode 100644
index 0000000..c21fba7
--- /dev/null
+++ b/src/cpp/util/time.h
@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_INTERNAL_UTIL_TIME_H__
+#define __GRPCPP_INTERNAL_UTIL_TIME_H__
+
+#include <chrono>
+
+#include <grpc/support/time.h>
+
+namespace grpc {
+
+// from and to should be absolute time.
+void AbsoluteDeadlineTimepoint2Timespec(
+    const std::chrono::system_clock::time_point& from, gpr_timespec* to);
+
+std::chrono::system_clock::time_point AbsoluteDeadlineTimespec2Timepoint(
+    gpr_timespec t);
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_INTERNAL_UTIL_TIME_H__