Part of the update to the new API

src/node/ext/call.cc

@@ -31,6 +31,8 @@
  *
  */
 
+#include <vector>
+
 #include <node.h>
 
 #include "grpc/support/log.h"
@@ -68,6 +70,50 @@ using v8::Value;
 Persistent<Function> Call::constructor;
 Persistent<FunctionTemplate> Call::fun_tpl;
 
+bool CreateMetadataArray(Handle<Object> metadata, grpc_metadata_array *array
+                         vector<NanUtf8String*> *string_handles,
+                         vector<Persistent<Value>*> *handles) {
+  NanScope();
+  Handle<Array> keys(metadata->GetOwnPropertyNames());
+  for (unsigned int i = 0; i < keys->Length(); i++) {
+    Handle<String> current_key(keys->Get(i)->ToString());
+    if (!metadata->Get(current_key)->IsArray()) {
+      return false;
+    }
+    array->capacity += Local<Array>::Cast(metadata->Get(current_key))->Length();
+  }
+  array->metadata = calloc(array->capacity, sizeof(grpc_metadata));
+  for (unsigned int i = 0; i < keys->Length(); i++) {
+    Handle<String> current_key(keys->Get(i)->ToString());
+    NanUtf8String *utf8_key = new NanUtf8String(current_key);
+    string_handles->push_back(utf8_key);
+    Handle<Array> values = Local<Array>::Cast(metadata->Get(current_key));
+    for (unsigned int j = 0; j < values->Length(); j++) {
+      Handle<Value> value = values->Get(j);
+      grpc_metadata *current = &array[array->count];
+      grpc_call_error error;
+      current->key = **utf8_key;
+      if (Buffer::HasInstance(value)) {
+        current->value = Buffer::Data(value);
+        current->value_length = Buffer::Length(value);
+        Persistent<Value> *handle = new Persistent<Value>();
+        NanAssignPersistent(handle, object);
+        handles->push_back(handle);
+      } else if (value->IsString()) {
+        Handle<String> string_value = value->ToString();
+        NanUtf8String *utf8_value = new NanUtf8String(string_value);
+        string_handles->push_back(utf8_value);
+        current->value = **utf8_value;
+        current->value_length = string_value->Length();
+      } else {
+        return false;
+      }
+      array->count += 1;
+    }
+  }
+  return true;
+}
+
 Call::Call(grpc_call *call) : wrapped_call(call) {}
 
 Call::~Call() { grpc_call_destroy(wrapped_call); }
@@ -152,9 +198,9 @@ NAN_METHOD(Call::New) {
       NanUtf8String method(args[1]);
       double deadline = args[2]->NumberValue();
       grpc_channel *wrapped_channel = channel->GetWrappedChannel();
-      grpc_call *wrapped_call = grpc_channel_create_call_old(
-          wrapped_channel, *method, channel->GetHost(),
-          MillisecondsToTimespec(deadline));
+      grpc_call *wrapped_call = grpc_channel_create_call(
+          wrapped_channel, CompletionQueueAsyncWorker::GetQueue(), *method,
+          channel->GetHost(), MillisecondsToTimespec(deadline));
       call = new Call(wrapped_call);
       args.This()->SetHiddenValue(String::NewSymbol("channel_"),
                                   channel_object);
@@ -168,6 +214,109 @@ NAN_METHOD(Call::New) {
   }
 }
 
+NAN_METHOD(Call::StartBatch) {
+  NanScope();
+  if (!HasInstance(args.This())) {
+    return NanThrowTypeError("startBatch can only be called on Call objects");
+  }
+  if (!args[0]->IsObject()) {
+    return NanThrowError("startBatch's first argument must be an object");
+  }
+  if (!args[1]->IsFunction()) {
+    return NanThrowError("startBatch's second argument must be a callback");
+  }
+  vector<Persistent<Value> *> *handles = new vector<Persistent<Value>>();
+  vector<NanUtf8String *> *strings = new vector<NanUtf8String *>();
+  Persistent<Value> *handle;
+  Handle<Array> keys = args[0]->GetOwnPropertyNames();
+  size_t nops = keys->Length();
+  grpc_op *ops = calloc(nops, sizeof(grpc_op));
+  grpc_metadata_array array;
+  Handle<Object> server_status;
+  NanUtf8String *str;
+  for (unsigned int i = 0; i < nops; i++) {
+    if (!keys->Get(i)->IsUInt32()) {
+      return NanThrowError(
+          "startBatch's first argument's keys must be integers");
+    }
+    uint32_t type = keys->Get(i)->UInt32Value();
+    ops[i].op = type;
+    switch (type) {
+      case GRPC_OP_SEND_INITIAL_METADATA:
+        if (!args[0]->Get(type)->IsObject()) {
+          return NanThrowError("metadata must be an object");
+        }
+        if (!CreateMetadataArray(args[0]->Get(type)->ToObject(), &array,
+                                 strings, handles)) {
+          return NanThrowError("failed to parse metadata");
+        }
+        ops[i].data.send_initial_metadata.count = array.count;
+        ops[i].data.send_initial_metadata.metadata = array.metadata;
+        break
+      case GRPC_OP_SEND_MESSAGE:
+        if (!Buffer::HasInstance(args[0]->Get(type))) {
+          return NanThrowError("message must be a Buffer");
+        }
+        ops[i].data.send_message = BufferToByteBuffer(args[0]->Get(type));
+        handle = new Persistent<Value>();
+        NanAssignPersistent(*handle, args[0]->Get(type));
+        handles->push_back(handle);
+        break;
+      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+        break;
+      case GRPC_OP_SEND_STATUS_FROM_SERVER:
+        if (!args[0]->Get(type)->IsObject()) {
+          return NanThrowError("server status must be an object");
+        }
+        server_status = args[0]->Get(type)->ToObject();
+        if (!server_status->Get("metadata")->IsObject()) {
+          return NanThrowError("status metadata must be an object");
+        }
+        if (!server_status->Get("code")->IsUInt32()) {
+          return NanThrowError("status code must be a positive integer");
+        }
+        if (!server_status->Get("details")->IsString()) {
+          return NanThrowError("status details must be a string");
+        }
+        if (!CreateMetadataArray(server_status->Get("metadata")->ToObject(),
+                                 &array, strings, handles)) {
+          return NanThrowError("Failed to parse status metadata");
+        }
+        ops[i].data.send_status_from_server.trailing_metadata_count =
+            array.count;
+        ops[i].data.send_status_from_server.trailing_metadata = array.metadata;
+        ops[i].data.send_status_from_server.status =
+            server_status->Get("code")->UInt32Value();
+        str = new NanUtf8String(server_status->Get("details"));
+        strings->push_back(str);
+        ops[i].data.send_status_from_server.status_details = **str;
+        break;
+      case GRPC_OP_RECV_INITIAL_METADATA:
+        ops[i].data.recv_initial_metadata = malloc(sizeof(grpc_metadata_array));
+        grpc_metadata_array_init(ops[i].data.recv_initial_metadata);
+        break;
+      case GRPC_OP_RECV_MESSAGE:
+        ops[i].data.recv_message = malloc(sizeof(grpc_byte_buffer*));
+        break;
+      case GRPC_OP_RECV_STATUS_ON_CLIENT:
+        ops[i].data.recv_status_on_client.trailing_metadata =
+            malloc(sizeof(grpc_metadata_array));
+        grpc_metadata_array_init(ops[i].data.recv_status_on_client);
+        ops[i].data.recv_status_on_client.status =
+            malloc(sizeof(grpc_status_code));
+        ops[i].data.recv_status_on_client.status_details =
+            malloc(sizeof(char *));
+        ops[i].data.recv_status_on_client.status_details_capacity =
+            malloc(sizeof(size_t));
+        break;
+      case GRPC_OP_RECV_CLOSE_ON_SERVER:
+        ops[i].data.recv_close_on_server = malloc(sizeof(int));
+        break;
+
+    }
+  }
+}
+
 NAN_METHOD(Call::AddMetadata) {
   NanScope();
   if (!HasInstance(args.This())) {

src/node/ext/node_grpc.cc

@@ -161,6 +161,36 @@ void InitCompletionTypeConstants(Handle<Object> exports) {
   completion_type->Set(NanNew("SERVER_RPC_NEW"), SERVER_RPC_NEW);
 }
 
+void InitOpTypeConstants(Handle<Object> exports) {
+  NanScope();
+  Handle<Object> op_type = Object::New();
+  exports->Set(NanNew("opType"), op_type);
+  Handle<Value> SEND_INITIAL_METADATA(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_INITIAL_METADATA));
+  op_type->Set(NanNew("SEND_INITIAL_METADATA"), SEND_INITIAL_METADATA);
+  Handle<Value> SEND_MESSAGE(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_MESSAGE));
+  op_type->Set(NanNew("SEND_MESSAGE"), SEND_MESSAGE);
+  Handle<Value> SEND_CLOSE_FROM_CLIENT(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_CLOSE_FROM_CLIENT));
+  op_type->Set(NanNew("SEND_CLOSE_FROM_CLIENT"), SEND_CLOSE_FROM_CLIENT);
+  Handle<Value> SEND_STATUS_FROM_SERVER(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_STATUS_FROM_SERVER));
+  op_type->Set(NanNew("SEND_STATUS_FROM_SERVER"), SEND_STATUS_FROM_SERVER);
+  Handle<Value> RECV_INITIAL_METADATA(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_INITIAL_METADATA));
+  op_type->Set(NanNew("RECV_INITIAL_METADATA"), RECV_INITIAL_METADATA);
+  Handle<Value> RECV_MESSAGE(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_MESSAGE));
+  op_type->Set(NanNew("RECV_MESSAGE"), RECV_MESSAGE);
+  Handle<Value> RECV_STATUS_ON_CLIENT(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_STATUS_ON_CLIENT));
+  op_type->Set(NanNew("RECV_STATUS_ON_CLIENT"), RECV_STATUS_ON_CLIENT);
+  Handle<Value> RECV_CLOSE_ON_SERVER(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_CLOSE_ON_SERVER));
+  op_type->Set(NanNew("RECV_CLOSE_ON_SERVER"), RECV_CLOSE_ON_SERVER);
+}
+
 void init(Handle<Object> exports) {
   NanScope();
   grpc_init();
@@ -168,6 +198,7 @@ void init(Handle<Object> exports) {
   InitCallErrorConstants(exports);
   InitOpErrorConstants(exports);
   InitCompletionTypeConstants(exports);
+  InitOpTypeConstants(exports);
 
   grpc::node::Call::Init(exports);
   grpc::node::Channel::Init(exports);

src/node/ext/tag.cc

@@ -31,68 +31,271 @@
  *
  */
 
+#include <map>
+#include <vector>
+
+#include <grpc/grpc.h>
 #include <stdlib.h>
 #include <node.h>
 #include <nan.h>
 #include "tag.h"
+#include "call.h"
 
 namespace grpc {
 namespace node {
 
+using v8::Boolean;
+using v8::Function;
 using v8::Handle;
 using v8::HandleScope;
 using v8::Persistent;
 using v8::Value;
 
-struct tag {
-  tag(Persistent<Value> *tag, Persistent<Value> *call)
-      : persist_tag(tag), persist_call(call) {}
+Handle<Value> ParseMetadata(grpc_metadata_array *metadata_array) {
+  NanEscapableScope();
+  grpc_metadata *metadata_elements = metadata_array->metadata;
+  size_t length = metadata_array->count;
+  std::map<char*, size_t> size_map;
+  std::map<char*, size_t> index_map;
+
+  for (unsigned int i = 0; i < length; i++) {
+    char *key = metadata_elements[i].key;
+    if (size_map.count(key)) {
+      size_map[key] += 1;
+    }
+    index_map[key] = 0;
+  }
+  Handle<Object> metadata_object = NanNew<Object>();
+  for (unsigned int i = 0; i < length; i++) {
+    grpc_metadata* elem = &metadata_elements[i];
+    Handle<String> key_string = String::New(elem->key);
+    Handle<Array> array;
+    if (metadata_object->Has(key_string)) {
+      array = Handle<Array>::Cast(metadata_object->Get(key_string));
+    } else {
+      array = NanNew<Array>(size_map[elem->key]);
+      metadata_object->Set(key_string, array);
+    }
+    array->Set(index_map[elem->key],
+               MakeFastBuffer(
+                   NanNewBufferHandle(elem->value, elem->value_length)));
+    index_map[elem->key] += 1;
+  }
+  return NanEscapeScope(metadata_object);
+}
+
+class OpResponse {
+ public:
+  explicit OpResponse(char *name): name(name) {
+  }
+  virtual Handle<Value> GetNodeValue() const = 0;
+  Handle<Value> GetOpType() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanNew(name));
+  }
+
+ private:
+  char *name;
+};
+
+class SendResponse : public OpResponse {
+ public:
+  explicit SendResponse(char *name): OpResponse(name) {
+  }
+
+  Handle<Value> GetNodeValue() {
+    NanEscapableScope();
+    return NanEscapeScope(NanTrue());
+  }
+}
+
+class MetadataResponse : public OpResponse {
+ public:
+  explicit MetadataResponse(grpc_metadata_array *recv_metadata):
+      recv_metadata(recv_metadata), OpResponse("metadata") {
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(ParseMetadata(recv_metadata));
+  }
+
+ private:
+  grpc_metadata_array *recv_metadata;
+};
+
+class MessageResponse : public OpResponse {
+ public:
+  explicit MessageResponse(grpc_byte_buffer **recv_message):
+      recv_message(recv_message), OpResponse("read") {
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(ByteBufferToBuffer(*recv_message));
+  }
+
+ private:
+  grpc_byte_buffer **recv_message
+};
+
+class ClientStatusResponse : public OpResponse {
+ public:
+  explicit ClientStatusResponse(grpc_metadata_array *metadata_array,
+                                grpc_status_code *status,
+                                char **status_details):
+      metadata_array(metadata_array), status(status),
+      status_details(status_details), OpResponse("status") {
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    Handle<Object> status_obj = NanNew<Object>();
+    status_obj->Set(NanNew("code"), NanNew<Number>(*status));
+    if (event->data.finished.details != NULL) {
+      status_obj->Set(NanNew("details"), String::New(*status_details));
+    }
+    status_obj->Set(NanNew("metadata"), ParseMetadata(metadata_array));
+    return NanEscapeScope(status_obj);
+  }
+ private:
+  grpc_metadata_array *metadata_array;
+  grpc_status_code *status;
+  char **status_details;
+};
+
+class ServerCloseResponse : public OpResponse {
+ public:
+  explicit ServerCloseResponse(int *cancelled): cancelled(cancelled),
+                                                OpResponse("cancelled") {
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    NanEscapeScope(NanNew<Boolean>(*cancelled));
+  }
+
+ private:
+  int *cancelled;
+};
+
+class NewCallResponse : public OpResponse {
+ public:
+  explicit NewCallResponse(grpc_call **call, grpc_call_details *details,
+                           grpc_metadata_array *request_metadata) :
+      call(call), details(details), request_metadata(request_metadata),
+      OpResponse("call"){
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    if (*call == NULL) {
+      return NanEscapeScope(NanNull());
+    }
+    Handle<Object> obj = NanNew<Object>();
+    obj->Set(NanNew("call"), Call::WrapStruct(*call));
+    obj->Set(NanNew("method"), NanNew(details->method));
+    obj->Set(NanNew("host"), NanNew(details->host));
+    obj->Set(NanNew("deadline"),
+             NanNew<Date>(TimespecToMilliseconds(details->deadline)));
+    obj->Set(NanNew("metadata"), ParseMetadata(request_metadata));
+    return NanEscapeScope(obj);
+  }
+ private:
+  grpc_call **call;
+  grpc_call_details *details;
+  grpc_metadata_array *request_metadata;
+}
 
+struct tag {
+  tag(NanCallback *callback, std::vector<OpResponse*> *responses) :
+      callback(callback), repsonses(responses) {
+  }
   ~tag() {
-    persist_tag->Dispose();
-    if (persist_call != NULL) {
-      persist_call->Dispose();
+    for (std::vector<OpResponse *>::iterator it = responses->begin();
+       it != responses->end(); ++it) {
+      delete *it;
     }
+    delete callback;
+    delete responses;
   }
-  Persistent<Value> *persist_tag;
-  Persistent<Value> *persist_call;
+  NanCallback *callback;
+  std::vector<OpResponse*> *responses;
 };
 
-void *CreateTag(Handle<Value> tag, Handle<Value> call) {
+void *CreateTag(Handle<Function> callback, grpc_op *ops, size_t nops) {
   NanScope();
-  Persistent<Value> *persist_tag = new Persistent<Value>();
-  NanAssignPersistent(*persist_tag, tag);
-  Persistent<Value> *persist_call;
-  if (call->IsNull() || call->IsUndefined()) {
-    persist_call = NULL;
-  } else {
-    persist_call = new Persistent<Value>();
-    NanAssignPersistent(*persist_call, call);
-  }
-  struct tag *tag_struct = new struct tag(persist_tag, persist_call);
+  NanCallback *cb = new NanCallback(callback);
+  vector<OpResponse*> *responses = new vector<OpResponse*>();
+  for (size_t i = 0; i < nops; i++) {
+    grpc_op *op = &ops[i];
+    OpResponse *resp;
+    // Switching on the TYPE of the op
+    switch (op->op) {
+      case GRPC_OP_SEND_INITIAL_METADATA:
+        resp = new SendResponse("send metadata");
+        break;
+      case GRPC_OP_SEND_MESSAGE:
+        resp = new SendResponse("write");
+        break;
+      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+        resp = new SendResponse("client close");
+        break;
+      case GRPC_OP_SEND_STATUS_FROM_SERVER:
+        resp = new SendResponse("server close");
+        break;
+      case GRPC_OP_RECV_INITIAL_METADATA:
+        resp = new MetadataResponse(op->data.recv_initial_metadata);
+        break;
+      case GRPC_OP_RECV_MESSAGE:
+        resp = new MessageResponse(op->data.recv_message);
+        break;
+      case GRPC_OP_RECV_STATUS_ON_CLIENT:
+        resp = new ClientStatusResponse(
+            op->data.recv_status_on_client.trailing_metadata,
+            op->data.recv_status_on_client.status,
+            op->data.recv_status_on_client.status_details);
+        break;
+      case GRPC_RECV_CLOSE_ON_SERVER:
+        resp = new ServerCloseResponse(op->data.recv_close_on_server.cancelled);
+        break;
+      default:
+        continue;
+    }
+    responses->push_back(resp);
+  }
+  struct tag *tag_struct = new struct tag(cb, responses);
   return reinterpret_cast<void *>(tag_struct);
 }
 
-Handle<Value> GetTagHandle(void *tag) {
+void *CreateTag(Handle<Function> callback, grpc_call **call,
+                grpc_call_details *details,
+                grpc_metadata_array *request_metadata) {
   NanEscapableScope();
-  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  Handle<Value> tag_value = NanNew<Value>(*tag_struct->persist_tag);
-  return NanEscapeScope(tag_value);
+  NanCallback *cb = new NanCallback(callback);
+  vector<OpResponse*> *responses = new vector<OpResponse*>();
+  OpResponse *resp = new NewCallResponse(call, details, request_metadata);
+  responses->push_back(resp);
+  struct tag *tag_struct = new struct tag(cb, responses);
+  return reinterpret_cast<void *>(tag_struct);
 }
 
-bool TagHasCall(void *tag) {
+NanCallback GetCallback(void *tag) {
+  NanEscapableScope();
   struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  return tag_struct->persist_call != NULL;
+  return NanEscapeScope(*tag_struct->callback);
 }
 
-Handle<Value> TagGetCall(void *tag) {
+Handle<Value> GetNodeValue(void *tag) {
   NanEscapableScope();
   struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  if (tag_struct->persist_call == NULL) {
-    return NanEscapeScope(NanNull());
+  Handle<Object> obj = NanNew<Object>();
+  for (std::vector<OpResponse *>::iterator it = tag_struct->responses->begin();
+       it != tag_struct->responses->end(); ++it) {
+    OpResponse *resp = *it;
+    obj->Set(resp->GetOpType(), resp->GetNodeValue());
   }
-  Handle<Value> call_value = NanNew<Value>(*tag_struct->persist_call);
-  return NanEscapeScope(call_value);
+  return NanEscapeScope(obj);
 }
 
 void DestroyTag(void *tag) { delete reinterpret_cast<struct tag *>(tag); }

src/node/ext/tag.h

@@ -34,21 +34,29 @@
 #ifndef NET_GRPC_NODE_TAG_H_
 #define NET_GRPC_NODE_TAG_H_
 
+#include <grpc/grpc.h>
 #include <node.h>
+#include <nan.h>
 
 namespace grpc {
 namespace node {
 
-/* Create a void* tag that can be passed to various grpc_call functions from
-   a javascript value and the javascript wrapper for the call. The call can be
-   null. */
-void *CreateTag(v8::Handle<v8::Value> tag, v8::Handle<v8::Value> call);
-/* Return the javascript value stored in the tag */
-v8::Handle<v8::Value> GetTagHandle(void *tag);
-/* Returns true if the call was set (non-null) when the tag was created */
-bool TagHasCall(void *tag);
-/* Returns the javascript wrapper for the call associated with this tag */
-v8::Handle<v8::Value> TagGetCall(void *call);
+/* Create a void* tag that can be passed to grpc_call_start_batch from a callback
+   function and an ops array */
+void *CreateTag(v8::Handle<v8::Function> callback, grpc_op *ops, size_t nops);
+
+/* Create a void* tag that can be passed to grpc_server_request_call from a
+   callback and the various out parameters to that function */
+void *CreateTag(v8::Handle<v8::Function> callback, grpc_call **call,
+                grpc_call_details *details,
+                grpc_metadata_array *request_metadata);
+
+/* Get the callback from the tag */
+NanCallback GetCallback(void *tag);
+
+/* Get the combined output value from the tag */
+v8::Handle<v8::Value> GetNodevalue(void *tag);
+
 /* Destroy the tag and all resources it is holding. It is illegal to call any
    of these other functions on a tag after it has been destroyed. */
 void DestroyTag(void *tag);