void RpcGenerator::generateImplementsMethod(const google::protobuf::ServiceDescriptor *descriptor,
google::protobuf::io::Printer &printer) const
{
printer.PrintRaw(implementsReturnType);
printer.Print(" $serviceName$_Dispatcher::$implementsSignature$\n{\n",
"serviceName", descriptor->name(),
"implementsSignature", implementsSignature);
printer.Indent();
printer.Print("// This is NOT thread safe ...\n");
printer.Print("static $implementsReturnType$ methodIds;\n",
"implementsReturnType", implementsReturnType);
printer.Print("static bool init = true;\n");
printer.Print("if (init) {\n");
printer.Indent();
for(int j=0; j<descriptor->method_count(); j++) {
const MethodDescriptor *method = descriptor->method(j);
string methodName = method->full_name();
int methodId = RpcPlugin::generateExtensionNumber(methodName);
ostringstream methodIdStr;
methodIdStr << methodId;
printer.Print("methodIds.push_back($methodId$);\n", "methodId",
methodIdStr.str());
}
printer.Print("init = false;\n");
printer.Outdent();
printer.Print("}\n");
printer.Print("return methodIds;\n");
printer.Outdent();
printer.Print("}\n");
}
void RpcGenerator::generateSentExternalBlock(const string &variableName,
const string &channelName, const google::protobuf::Descriptor *descriptor,
google::protobuf::io::Printer &printer) const
{
for(int i=0; i< descriptor->field_count(); i++) {
const FieldDescriptor *field = descriptor->field(i);
if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
string messageTypeName = field->message_type()->full_name();
if (messageTypeName.find("external.") == 0) {
string externalClass = externalTypeToClass(messageTypeName);
std::ostringstream stream;
stream << "obj" << i;
string var = stream.str();
printer.Print("if ($variableName$->has_$fieldName$()) {\n",
"variableName", variableName, "fieldName", field->lowercase_name());
printer.Indent();
printer.Print("$externalClass$ *$var$ = ", "externalClass", externalClass, "var", var);
printer.Print("$variableName$->$fieldName$().get();\n", "variableName",
variableName, "fieldName", field->lowercase_name());
printer.Print("if ($var$) {\n", "var", var);
printer.Indent();
printer.Print("$externalClass$Serializer serializer($var$);\n",
"externalClass", externalClass, "var", var);
printer.Print("size_t size = serializer.size();\n");
std::map<string, string> variables;
variables["channelName"] = channelName;
printer.Print("std::vector<unsigned char> data(size);\n");
this->generateErrorCheck("serializer.serialize(&data[0], size)", variables,
printer, "$channelName$->setErrorString(\"Serialization failed\");return;\n");
variables.clear();
variables["channelName"] = channelName;
// Send the size first
this->generateErrorCheck("$channelName$->send(size)", variables,
printer);
this->generateErrorCheck("$channelName$->send(&data[0], size)", variables,
printer);
printer.Outdent();
printer.Print("}\n");
printer.Outdent();
printer.Print("}\n");
}
}
}
}
void RpcGenerator::generateSentVtkBlock(const string &variableName,
const string &channelName, const google::protobuf::Descriptor *descriptor,
google::protobuf::io::Printer &printer) const
{
for(int i=0; i< descriptor->field_count(); i++) {
const FieldDescriptor *field = descriptor->field(i);
if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
string messageTypeName = field->message_type()->full_name();
if (messageTypeName.find("vtk.") == 0) {
string vtkType = messageTypeName.substr(4);
std::ostringstream stream;
stream << "obj" << i;
string var = stream.str();
printer.Print("if ($variableName$->has_$fieldName$()) {\n",
"variableName", variableName, "fieldName", field->lowercase_name());
printer.Indent();
printer.Print("$vtkType$ *$var$ = ", "vtkType", vtkType, "var", var);
printer.Print("$variableName$->$fieldName$().get();\n", "variableName",
variableName, "fieldName", field->lowercase_name());
printer.Print("if ($var$) {\n", "var", var);
printer.Indent();
std::map<string, string> variables;
variables["var"] = var;
variables["channelName"] = channelName;
this->generateErrorCheck("$channelName$->send($var$)", variables,
printer);
printer.Outdent();
printer.Print("}\n");
printer.Outdent();
printer.Print("}\n");
}
}
}
}
void RpcGenerator::generateRelyMethod(
const google::protobuf::ServiceDescriptor *descriptor,
google::protobuf::io::Printer &printer) const
{
printer.Print("void $service$_Dispatcher::$replySignature$\n{\n",
"service", descriptor->full_name(), "replySignature",
replySignature);
printer.Indent();
printer.Print("switch(info.methodId) {\n");
printer.Indent();
for(int j=0; j<descriptor->method_count(); j++) {
const MethodDescriptor *method = descriptor->method(j);
string methodName = method->full_name();
int methodId = RpcPlugin::generateExtensionNumber(methodName);
string inputTypeName = method->input_type()->name();
string outputTypeName = method->output_type()->name();
if (isVoidType(outputTypeName))
continue;
ostringstream methodIdStr;
methodIdStr << methodId;
printer.Print("case $methodId$ : {\n", "methodId", methodIdStr.str());
printer.Indent();
printer.Print("// $methodName$\n", "methodName", methodName);
printer.Print("// Prepare the response\n");
printer.Print("rpc::Message msg;\n");
printer.Print("rpc::Response *response = msg.mutable_response();\n");
printer.Print("uint64 requestId = info.requestMessageEnvelope->request().id();\n");
printer.Print("response->set_id(requestId);\n");
string extensionName = toExtensionName(method->full_name());
std::ostringstream var;
var << "tmp" << j;
printer.Print("$responseType$ *$var$ = static_cast<$responseType$ *>(info.response);\n",
"responseType", outputTypeName, "var", var.str());
// Add error info
printer.Print("if ($var$->hasError()) {\n", "var", var.str());
printer.Indent();
printer.Print("response->set_errorstring($var$->errorString());\n", "var", var.str());
printer.Print("response->set_errorcode($var$->errorCode());\n", "var", var.str());
printer.Outdent();
printer.Print("}\n");
printer.Print("response->SetAllocatedExtension($extensionName$, $var$);\n",
"extensionName", extensionName + "_response", "var", var.str());
printer.Print("// Make sure request is cleaned up\n");
printer.Print("std::auto_ptr<rpc::Message> request;\n");
printer.Print("request.reset(info.requestMessageEnvelope);\n");
this->generateErrorCheck("info.replyChannel->send(&msg)", printer);
// send any VTK object we need to.
this->generateSentVtkBlock(var.str(), "info.replyChannel",
method->output_type(), printer);
// send any external objects we need to.
this->generateSentExternalBlock(var.str(), "info.replyChannel",
method->output_type(), printer);
printer.Outdent();
printer.Print("break;\n");
printer.Print("}\n");
}
printer.Print("default:\n");
printer.Indent();
printer.Print("// TODO error case\n");
printer.Print("info.replyChannel->setErrorString(\"No reply case for messageId: \" + info.methodId);\n");
printer.Outdent();
printer.Outdent();
printer.Print("}\n");
printer.Outdent();
printer.Print("}\n");
}
void RpcGenerator::generateDispatchMethodBody(
const google::protobuf::ServiceDescriptor *descriptor,
google::protobuf::io::Printer &printer) const
{
printer.Indent();
printer.Print("switch(methodId) { \n");
printer.Indent();
for(int j=0; j<descriptor->method_count(); j++) {
const MethodDescriptor *method = descriptor->method(j);
string methodName = method->full_name();
int methodId = RpcPlugin::generateExtensionNumber(methodName);
string inputTypeName = method->input_type()->name();
string outputTypeName = method->output_type()->name();
ostringstream methodIdStr;
methodIdStr << methodId;
printer.Print("case $methodId$ : {\n", "methodId", methodIdStr.str());
printer.Indent();
printer.Print("// $methodName$\n", "methodName", methodName);
if (!isVoidType(inputTypeName)) {
printer.Print("const $inputType$ *in = static_cast<const $inputType$ *>(request);\n",
"inputType", inputTypeName);
// Receive any VTK types that might be on the wire ...
generateReceiveVtkBlock("request", "replyChannel",
method->input_type(),printer);
// Receive any external type that might be on the wire ...
generateReceiveExternalBlock("request", "replyChannel",
method->input_type(),printer);
}
if (!isVoidType(outputTypeName)) {
printer.Print("$outputType$ *out = new $outputType$();\n",
"outputType", outputTypeName);
printer.Print("ProtoCall::Runtime::ReplyInfo info;\n");
printer.Print("info.methodId = $methodId$;\n", "methodId", methodIdStr.str());
printer.Print("info.requestMessageEnvelope = requestMessageEnvelope;\n");
printer.Print("info.response = out;\n");
printer.Print("info.replyChannel = replyChannel;\n");
string dispatcherName = descriptor->name() + "_Dispatcher";
printer.Print("::google::protobuf::Closure *done = "
"::google::protobuf::NewCallback(this, &$dispatcherName$::reply, info);\n",
"dispatcherName", dispatcherName);
}
else {
printer.Print("::google::protobuf::Closure *done = google::protobuf::NewCallback(&google::protobuf::DoNothing);\n");
}
printer.Print("static_cast<$service$ *>(m_service)->$methodName$(", "service",
descriptor->name(), "methodName", method->name());
if (!isVoidType(inputTypeName))
printer.Print("in");
if (!isVoidType(inputTypeName) && !isVoidType(outputTypeName))
printer.Print(", ");
if (!isVoidType(outputTypeName))
printer.Print("out");
if (!isVoidType(inputTypeName) || !isVoidType(outputTypeName))
printer.Print(", ");
printer.Print("done);\n");
printer.Outdent();
printer.Print("break;\n");
printer.Print("}\n");
}
printer.Print("default:\n");
printer.Indent();
printer.Print("replyChannel->setErrorString(\"No case for messageId: \" + methodId);");
printer.Outdent();
printer.Outdent();
printer.Print("}\n");
printer.Outdent();
}
