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apache / thrift / 4a280d56cca90296228ca29c7c582fa423d74e1f / . / compiler / cpp / src / thrift / generate / t_cpp_generator.cc
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* Contains some contributions under the Thrift Software License.
* Please see doc/old-thrift-license.txt in the Thrift distribution for
* details.
*/
#include <cassert>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <limits>
#include <sstream>
#include <string>
#include <vector>
#include <sys/stat.h>
#include "thrift/platform.h"
#include "thrift/generate/t_oop_generator.h"
using std::map;
using std::ofstream;
using std::ostream;
using std::string;
using std::vector;
/**
* C++ code generator. This is legitimacy incarnate.
*
*/
class t_cpp_generator : public t_oop_generator {
public:
t_cpp_generator(t_program* program,
const std::map<std::string, std::string>& parsed_options,
const std::string& option_string)
: t_oop_generator(program) {
(void)option_string;
std::map<std::string, std::string>::const_iterator iter;
gen_pure_enums_ = false;
use_include_prefix_ = false;
gen_cob_style_ = false;
gen_no_client_completion_ = false;
gen_no_default_operators_ = false;
gen_templates_ = false;
gen_templates_only_ = false;
gen_moveable_ = false;
gen_no_ostream_operators_ = false;
gen_no_skeleton_ = false;
has_members_ = false;
for( iter = parsed_options.begin(); iter != parsed_options.end(); ++iter) {
if( iter->first.compare("pure_enums") == 0) {
gen_pure_enums_ = true;
} else if( iter->first.compare("include_prefix") == 0) {
use_include_prefix_ = true;
} else if( iter->first.compare("cob_style") == 0) {
gen_cob_style_ = true;
} else if( iter->first.compare("no_client_completion") == 0) {
gen_no_client_completion_ = true;
} else if( iter->first.compare("no_default_operators") == 0) {
gen_no_default_operators_ = true;
} else if( iter->first.compare("templates") == 0) {
gen_templates_ = true;
gen_templates_only_ = (iter->second == "only");
} else if( iter->first.compare("moveable_types") == 0) {
gen_moveable_ = true;
} else if ( iter->first.compare("no_ostream_operators") == 0) {
gen_no_ostream_operators_ = true;
} else if ( iter->first.compare("no_skeleton") == 0) {
gen_no_skeleton_ = true;
} else {
throw "unknown option cpp:" + iter->first;
}
}
out_dir_base_ = "gen-cpp";
}
/**
* Init and close methods
*/
void init_generator() override;
void close_generator() override;
std::string display_name() const override;
void generate_consts(std::vector<t_const*> consts) override;
/**
* Program-level generation functions
*/
void generate_typedef(t_typedef* ttypedef) override;
void generate_enum(t_enum* tenum) override;
void generate_enum_ostream_operator_decl(std::ostream& out, t_enum* tenum);
void generate_enum_ostream_operator(std::ostream& out, t_enum* tenum);
void generate_enum_to_string_helper_function_decl(std::ostream& out, t_enum* tenum);
void generate_enum_to_string_helper_function(std::ostream& out, t_enum* tenum);
void generate_forward_declaration(t_struct* tstruct) override;
void generate_struct(t_struct* tstruct) override { generate_cpp_struct(tstruct, false); }
void generate_xception(t_struct* txception) override { generate_cpp_struct(txception, true); }
void generate_cpp_struct(t_struct* tstruct, bool is_exception);
void generate_service(t_service* tservice) override;
void print_const_value(std::ostream& out, std::string name, t_type* type, t_const_value* value);
std::string render_const_value(std::ostream& out,
std::string name,
t_type* type,
t_const_value* value);
void generate_struct_declaration(std::ostream& out,
t_struct* tstruct,
bool is_exception = false,
bool pointers = false,
bool read = true,
bool write = true,
bool swap = false,
bool is_user_struct = false);
void generate_struct_definition(std::ostream& out,
std::ostream& force_cpp_out,
t_struct* tstruct,
bool setters = true,
bool is_user_struct = false,
bool pointers = false);
void generate_copy_constructor(std::ostream& out, t_struct* tstruct, bool is_exception);
void generate_move_constructor(std::ostream& out, t_struct* tstruct, bool is_exception);
void generate_default_constructor(std::ostream& out, t_struct* tstruct, bool is_exception);
void generate_constructor_helper(std::ostream& out,
t_struct* tstruct,
bool is_excpetion,
bool is_move);
void generate_assignment_operator(std::ostream& out, t_struct* tstruct);
void generate_equality_operator(std::ostream& out, t_struct* tstruct);
void generate_move_assignment_operator(std::ostream& out, t_struct* tstruct);
void generate_assignment_helper(std::ostream& out, t_struct* tstruct, bool is_move);
void generate_struct_reader(std::ostream& out, t_struct* tstruct, bool pointers = false);
void generate_struct_writer(std::ostream& out, t_struct* tstruct, bool pointers = false);
void generate_struct_result_writer(std::ostream& out, t_struct* tstruct, bool pointers = false);
void generate_struct_swap(std::ostream& out, t_struct* tstruct);
void generate_struct_print_method(std::ostream& out, t_struct* tstruct);
void generate_exception_what_method(std::ostream& out, t_struct* tstruct);
/**
* Service-level generation functions
*/
void generate_service_interface(t_service* tservice, string style);
void generate_service_interface_factory(t_service* tservice, string style);
void generate_service_null(t_service* tservice, string style);
void generate_service_multiface(t_service* tservice);
void generate_service_helpers(t_service* tservice);
void generate_service_client(t_service* tservice, string style);
void generate_service_processor(t_service* tservice, string style);
void generate_service_skeleton(t_service* tservice);
void generate_process_function(t_service* tservice,
t_function* tfunction,
string style,
bool specialized = false);
void generate_function_helpers(t_service* tservice, t_function* tfunction);
void generate_service_async_skeleton(t_service* tservice);
/**
* Serialization constructs
*/
void generate_deserialize_field(std::ostream& out,
t_field* tfield,
std::string prefix = "",
std::string suffix = "");
void generate_deserialize_struct(std::ostream& out,
t_struct* tstruct,
std::string prefix = "",
bool pointer = false);
void generate_deserialize_container(std::ostream& out, t_type* ttype, std::string prefix = "");
void generate_deserialize_set_element(std::ostream& out, t_set* tset, std::string prefix = "");
void generate_deserialize_map_element(std::ostream& out, t_map* tmap, std::string prefix = "");
void generate_deserialize_list_element(std::ostream& out,
t_list* tlist,
std::string prefix,
bool push_back,
std::string index);
void generate_serialize_field(std::ostream& out,
t_field* tfield,
std::string prefix = "",
std::string suffix = "");
void generate_serialize_struct(std::ostream& out,
t_struct* tstruct,
std::string prefix = "",
bool pointer = false);
void generate_serialize_container(std::ostream& out, t_type* ttype, std::string prefix = "");
void generate_serialize_map_element(std::ostream& out, t_map* tmap, std::string iter);
void generate_serialize_set_element(std::ostream& out, t_set* tmap, std::string iter);
void generate_serialize_list_element(std::ostream& out, t_list* tlist, std::string iter);
void generate_function_call(ostream& out,
t_function* tfunction,
string target,
string iface,
string arg_prefix);
/*
* Helper rendering functions
*/
std::string namespace_prefix(std::string ns);
std::string namespace_open(std::string ns);
std::string namespace_close(std::string ns);
std::string type_name(t_type* ttype, bool in_typedef = false, bool arg = false);
std::string base_type_name(t_base_type::t_base tbase);
std::string declare_field(t_field* tfield,
bool init = false,
bool pointer = false,
bool constant = false,
bool reference = false);
std::string function_signature(t_function* tfunction,
std::string style,
std::string prefix = "",
bool name_params = true);
std::string cob_function_signature(t_function* tfunction,
std::string prefix = "",
bool name_params = true);
std::string argument_list(t_struct* tstruct, bool name_params = true, bool start_comma = false);
std::string type_to_enum(t_type* ttype);
void generate_enum_constant_list(std::ostream& f,
const vector<t_enum_value*>& constants,
const char* prefix,
const char* suffix,
bool include_values);
void generate_struct_ostream_operator_decl(std::ostream& f, t_struct* tstruct);
void generate_struct_ostream_operator(std::ostream& f, t_struct* tstruct);
void generate_struct_print_method_decl(std::ostream& f, t_struct* tstruct);
void generate_exception_what_method_decl(std::ostream& f,
t_struct* tstruct,
bool external = false);
bool is_reference(t_field* tfield) { return tfield->get_reference(); }
bool is_complex_type(t_type* ttype) {
ttype = get_true_type(ttype);
return ttype->is_container() || ttype->is_struct() || ttype->is_xception()
|| (ttype->is_base_type()
&& (((t_base_type*)ttype)->get_base() == t_base_type::TYPE_STRING));
}
void set_use_include_prefix(bool use_include_prefix) { use_include_prefix_ = use_include_prefix; }
/**
* The compiler option "no_thrift_ostream_impl" can be used to prevent
* the compiler from emitting implementations for operator <<. In this
* case the consuming application must provide any needed to build.
*
* To disable this on a per structure bases, one can alternatively set
* the annotation "cpp.customostream" to prevent thrift from emitting an
* operator << (std::ostream&).
*
* See AnnotationTest for validation of this annotation feature.
*/
bool has_custom_ostream(t_type* ttype) const {
return (gen_no_ostream_operators_) ||
(ttype->annotations_.find("cpp.customostream") != ttype->annotations_.end());
}
/**
* Determine if all fields of t_struct's storage do not throw
* Move/Copy Constructors and Assignments applicable for 'noexcept'
* Move defaults to 'noexcept'
*/
bool is_struct_storage_not_throwing(t_struct* tstruct) const;
/**
* Helper function to determine whether any of the members of our struct
* has a default value.
*/
bool has_field_with_default_value(t_struct* tstruct);
private:
/**
* Returns the include prefix to use for a file generated by program, or the
* empty string if no include prefix should be used.
*/
std::string get_include_prefix(const t_program& program) const;
/**
* Returns the legal program name to use for a file generated by program, if the
* program name contains dots then replace it with underscores, otherwise return the
* original program name.
*/
std::string get_legal_program_name(std::string program_name);
/**
* True if we should generate pure enums for Thrift enums, instead of wrapper classes.
*/
bool gen_pure_enums_;
/**
* True if we should generate templatized reader/writer methods.
*/
bool gen_templates_;
/**
* True iff we should generate process function pointers for only templatized
* reader/writer methods.
*/
bool gen_templates_only_;
/**
* True if we should generate move constructors & assignment operators.
*/
bool gen_moveable_;
/**
* True if we should generate ostream definitions
*/
bool gen_no_ostream_operators_;
/**
* True iff we should use a path prefix in our #include statements for other
* thrift-generated header files.
*/
bool use_include_prefix_;
/**
* True if we should generate "Continuation OBject"-style classes as well.
*/
bool gen_cob_style_;
/**
* True if we should omit calls to completion__() in CobClient class.
*/
bool gen_no_client_completion_;
/**
* True if we should omit generating the default opeartors ==, != and <.
*/
bool gen_no_default_operators_;
/**
* True if we should generate skeleton.
*/
bool gen_no_skeleton_;
/**
* True if thrift has member(s)
*/
bool has_members_;
/**
* Strings for namespace, computed once up front then used directly
*/
std::string ns_open_;
std::string ns_close_;
/**
* File streams, stored here to avoid passing them as parameters to every
* function.
*/
ofstream_with_content_based_conditional_update f_types_;
ofstream_with_content_based_conditional_update f_types_impl_;
ofstream_with_content_based_conditional_update f_types_tcc_;
ofstream_with_content_based_conditional_update f_header_;
ofstream_with_content_based_conditional_update f_service_;
ofstream_with_content_based_conditional_update f_service_tcc_;
// The ProcessorGenerator is used to generate parts of the code,
// so it needs access to many of our protected members and methods.
//
// TODO: The code really should be cleaned up so that helper methods for
// writing to the output files are separate from the generator classes
// themselves.
friend class ProcessorGenerator;
};
/**
* Prepares for file generation by opening up the necessary file output
* streams.
*/
void t_cpp_generator::init_generator() {
// Make output directory
MKDIR(get_out_dir().c_str());
program_name_ = get_legal_program_name(program_name_);
// Make output file
string f_types_name = get_out_dir() + program_name_ + "_types.h";
f_types_.open(f_types_name);
string f_types_impl_name = get_out_dir() + program_name_ + "_types.cpp";
f_types_impl_.open(f_types_impl_name.c_str());
if (gen_templates_) {
// If we don't open the stream, it appears to just discard data,
// which is fine.
string f_types_tcc_name = get_out_dir() + program_name_ + "_types.tcc";
f_types_tcc_.open(f_types_tcc_name.c_str());
}
// Print header
f_types_ << autogen_comment();
f_types_impl_ << autogen_comment();
f_types_tcc_ << autogen_comment();
// Start ifndef
f_types_ << "#ifndef " << program_name_ << "_TYPES_H" << '\n' << "#define " << program_name_
<< "_TYPES_H" << '\n' << '\n';
f_types_tcc_ << "#ifndef " << program_name_ << "_TYPES_TCC" << '\n' << "#define " << program_name_
<< "_TYPES_TCC" << '\n' << '\n';
// Include base types
f_types_ << "#include <iosfwd>" << '\n'
<< '\n'
<< "#include <thrift/Thrift.h>" << '\n'
<< "#include <thrift/TApplicationException.h>" << '\n'
<< "#include <thrift/TBase.h>" << '\n'
<< "#include <thrift/protocol/TProtocol.h>" << '\n'
<< "#include <thrift/transport/TTransport.h>" << '\n'
<< '\n';
// Include C++xx compatibility header
f_types_ << "#include <functional>" << '\n';
f_types_ << "#include <memory>" << '\n';
// Include other Thrift includes
const vector<t_program*>& includes = program_->get_includes();
for (auto include : includes) {
f_types_ << "#include \"" << get_include_prefix(*include) << include->get_name()
<< "_types.h\"" << '\n';
// XXX(simpkins): If gen_templates_ is enabled, we currently assume all
// included files were also generated with templates enabled.
f_types_tcc_ << "#include \"" << get_include_prefix(*include) << include->get_name()
<< "_types.tcc\"" << '\n';
}
f_types_ << '\n';
// Include custom headers
const vector<string>& cpp_includes = program_->get_cpp_includes();
for (const auto & cpp_include : cpp_includes) {
if (cpp_include[0] == '<') {
f_types_ << "#include " << cpp_include << '\n';
} else {
f_types_ << "#include \"" << cpp_include << "\"" << '\n';
}
}
f_types_ << '\n';
// Include the types file
f_types_impl_ << "#include \"" << get_include_prefix(*get_program()) << program_name_
<< "_types.h\"" << '\n' << '\n';
f_types_tcc_ << "#include \"" << get_include_prefix(*get_program()) << program_name_
<< "_types.h\"" << '\n' << '\n';
// The swap() code needs <algorithm> for std::swap()
f_types_impl_ << "#include <algorithm>" << '\n';
// for operator<<
f_types_impl_ << "#include <ostream>" << '\n' << '\n';
f_types_impl_ << "#include <thrift/TToString.h>" << '\n' << '\n';
// Open namespace
ns_open_ = namespace_open(program_->get_namespace("cpp"));
ns_close_ = namespace_close(program_->get_namespace("cpp"));
f_types_ << ns_open_ << '\n' << '\n';
f_types_impl_ << ns_open_ << '\n' << '\n';
f_types_tcc_ << ns_open_ << '\n' << '\n';
}
/**
* Closes the output files.
*/
void t_cpp_generator::close_generator() {
// Close namespace
f_types_ << ns_close_ << '\n' << '\n';
f_types_impl_ << ns_close_ << '\n';
f_types_tcc_ << ns_close_ << '\n' << '\n';
// Include the types.tcc file from the types header file,
// so clients don't have to explicitly include the tcc file.
// TODO(simpkins): Make this a separate option.
if (gen_templates_) {
f_types_ << "#include \"" << get_include_prefix(*get_program()) << program_name_
<< "_types.tcc\"" << '\n' << '\n';
}
// Close ifndef
f_types_ << "#endif" << '\n';
f_types_tcc_ << "#endif" << '\n';
// Close output file
f_types_.close();
f_types_impl_.close();
f_types_tcc_.close();
string f_types_impl_name = get_out_dir() + program_name_ + "_types.cpp";
if (!has_members_) {
remove(f_types_impl_name.c_str());
}
}
/**
* Generates a typedef. This is just a simple 1-liner in C++
*
* @param ttypedef The type definition
*/
void t_cpp_generator::generate_typedef(t_typedef* ttypedef) {
generate_java_doc(f_types_, ttypedef);
f_types_ << indent() << "typedef " << type_name(ttypedef->get_type(), true) << " "
<< ttypedef->get_symbolic() << ";" << '\n' << '\n';
}
void t_cpp_generator::generate_enum_constant_list(std::ostream& f,
const vector<t_enum_value*>& constants,
const char* prefix,
const char* suffix,
bool include_values) {
f << " {" << '\n';
indent_up();
vector<t_enum_value*>::const_iterator c_iter;
bool first = true;
for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
if (first) {
first = false;
} else {
f << "," << '\n';
}
generate_java_doc(f, *c_iter);
indent(f) << prefix << (*c_iter)->get_name() << suffix;
if (include_values) {
f << " = " << (*c_iter)->get_value();
}
}
f << '\n';
indent_down();
indent(f) << "};" << '\n';
}
/**
* Generates code for an enumerated type. In C++, this is essentially the same
* as the thrift definition itself, using the enum keyword in C++.
*
* @param tenum The enumeration
*/
void t_cpp_generator::generate_enum(t_enum* tenum) {
vector<t_enum_value*> constants = tenum->get_constants();
std::string enum_name = tenum->get_name();
if (!gen_pure_enums_) {
enum_name = "type";
generate_java_doc(f_types_, tenum);
f_types_ << indent() << "struct " << tenum->get_name() << " {" << '\n';
indent_up();
}
f_types_ << indent() << "enum " << enum_name;
generate_enum_constant_list(f_types_, constants, "", "", true);
if (!gen_pure_enums_) {
indent_down();
f_types_ << "};" << '\n';
}
f_types_ << '\n';
/**
Generate a character array of enum names for debugging purposes.
*/
std::string prefix = "";
if (!gen_pure_enums_) {
prefix = tenum->get_name() + "::";
}
f_types_impl_ << indent() << "int _k" << tenum->get_name() << "Values[] =";
generate_enum_constant_list(f_types_impl_, constants, prefix.c_str(), "", false);
f_types_impl_ << indent() << "const char* _k" << tenum->get_name() << "Names[] =";
generate_enum_constant_list(f_types_impl_, constants, "\"", "\"", false);
f_types_ << indent() << "extern const std::map<int, const char*> _" << tenum->get_name()
<< "_VALUES_TO_NAMES;" << '\n' << '\n';
f_types_impl_ << indent() << "const std::map<int, const char*> _" << tenum->get_name()
<< "_VALUES_TO_NAMES(::apache::thrift::TEnumIterator(" << constants.size() << ", _k"
<< tenum->get_name() << "Values"
<< ", _k" << tenum->get_name() << "Names), "
<< "::apache::thrift::TEnumIterator(-1, nullptr, nullptr));" << '\n' << '\n';
generate_enum_ostream_operator_decl(f_types_, tenum);
generate_enum_ostream_operator(f_types_impl_, tenum);
generate_enum_to_string_helper_function_decl(f_types_, tenum);
generate_enum_to_string_helper_function(f_types_impl_, tenum);
has_members_ = true;
}
void t_cpp_generator::generate_enum_ostream_operator_decl(std::ostream& out, t_enum* tenum) {
out << "std::ostream& operator<<(std::ostream& out, const ";
if (gen_pure_enums_) {
out << tenum->get_name();
} else {
out << tenum->get_name() << "::type&";
}
out << " val);" << '\n';
out << '\n';
}
void t_cpp_generator::generate_enum_ostream_operator(std::ostream& out, t_enum* tenum) {
// If we've been told the consuming application will provide an ostream
// operator definition then we only make a declaration:
if (!has_custom_ostream(tenum)) {
out << "std::ostream& operator<<(std::ostream& out, const ";
if (gen_pure_enums_) {
out << tenum->get_name();
} else {
out << tenum->get_name() << "::type&";
}
out << " val) ";
scope_up(out);
out << indent() << "std::map<int, const char*>::const_iterator it = _"
<< tenum->get_name() << "_VALUES_TO_NAMES.find(val);" << '\n';
out << indent() << "if (it != _" << tenum->get_name() << "_VALUES_TO_NAMES.end()) {" << '\n';
indent_up();
out << indent() << "out << it->second;" << '\n';
indent_down();
out << indent() << "} else {" << '\n';
indent_up();
out << indent() << "out << static_cast<int>(val);" << '\n';
indent_down();
out << indent() << "}" << '\n';
out << indent() << "return out;" << '\n';
scope_down(out);
out << '\n';
}
}
void t_cpp_generator::generate_enum_to_string_helper_function_decl(std::ostream& out, t_enum* tenum) {
out << "std::string to_string(const ";
if (gen_pure_enums_) {
out << tenum->get_name();
} else {
out << tenum->get_name() << "::type&";
}
out << " val);" << '\n';
out << '\n';
}
void t_cpp_generator::generate_enum_to_string_helper_function(std::ostream& out, t_enum* tenum) {
if (!has_custom_ostream(tenum)) {
out << "std::string to_string(const ";
if (gen_pure_enums_) {
out << tenum->get_name();
} else {
out << tenum->get_name() << "::type&";
}
out << " val) " ;
scope_up(out);
out << indent() << "std::map<int, const char*>::const_iterator it = _"
<< tenum->get_name() << "_VALUES_TO_NAMES.find(val);" << '\n';
out << indent() << "if (it != _" << tenum->get_name() << "_VALUES_TO_NAMES.end()) {" << '\n';
indent_up();
out << indent() << "return std::string(it->second);" << '\n';
indent_down();
out << indent() << "} else {" << '\n';
indent_up();
out << indent() << "return std::to_string(static_cast<int>(val));" << '\n';
indent_down();
out << indent() << "}" << '\n';
scope_down(out);
out << '\n';
}
}
/**
* Generates a class that holds all the constants.
*/
void t_cpp_generator::generate_consts(std::vector<t_const*> consts) {
string f_consts_name = get_out_dir() + program_name_ + "_constants.h";
ofstream_with_content_based_conditional_update f_consts;
if (consts.size() > 0) {
f_consts.open(f_consts_name);
string f_consts_impl_name = get_out_dir() + program_name_ + "_constants.cpp";
ofstream_with_content_based_conditional_update f_consts_impl;
f_consts_impl.open(f_consts_impl_name);
// Print header
f_consts << autogen_comment();
f_consts_impl << autogen_comment();
// Start ifndef
f_consts << "#ifndef " << program_name_ << "_CONSTANTS_H" << '\n' << "#define " << program_name_
<< "_CONSTANTS_H" << '\n' << '\n' << "#include \"" << get_include_prefix(*get_program())
<< program_name_ << "_types.h\"" << '\n' << '\n' << ns_open_ << '\n' << '\n';
f_consts_impl << "#include \"" << get_include_prefix(*get_program()) << program_name_
<< "_constants.h\"" << '\n' << '\n' << ns_open_ << '\n' << '\n';
f_consts << "class " << program_name_ << "Constants {" << '\n' << " public:" << '\n' << " "
<< program_name_ << "Constants();" << '\n' << '\n';
indent_up();
vector<t_const*>::iterator c_iter;
for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
string name = (*c_iter)->get_name();
t_type* type = (*c_iter)->get_type();
f_consts << indent() << type_name(type) << " " << name << ";" << '\n';
}
indent_down();
f_consts << "};" << '\n';
f_consts_impl << "const " << program_name_ << "Constants g_" << program_name_ << "_constants;"
<< '\n' << '\n' << program_name_ << "Constants::" << program_name_
<< "Constants() {" << '\n';
indent_up();
for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
print_const_value(f_consts_impl,
(*c_iter)->get_name(),
(*c_iter)->get_type(),
(*c_iter)->get_value());
}
indent_down();
indent(f_consts_impl) << "}" << '\n';
f_consts << '\n' << "extern const " << program_name_ << "Constants g_" << program_name_
<< "_constants;" << '\n' << '\n' << ns_close_ << '\n' << '\n' << "#endif" << '\n';
f_consts.close();
f_consts_impl << '\n' << ns_close_ << '\n' << '\n';
f_consts_impl.close();
}
}
/**
* Prints the value of a constant with the given type. Note that type checking
* is NOT performed in this function as it is always run beforehand using the
* validate_types method in main.cc
*/
void t_cpp_generator::print_const_value(ostream& out,
string name,
t_type* type,
t_const_value* value) {
type = get_true_type(type);
if (type->is_base_type()) {
string v2 = render_const_value(out, name, type, value);
indent(out) << name << " = " << v2 << ";" << '\n' << '\n';
} else if (type->is_enum()) {
indent(out) << name
<< " = static_cast<" << type_name(type) << '>'
<< '(' << value->get_integer() << ");" << '\n' << '\n';
} else if (type->is_struct() || type->is_xception()) {
const vector<t_field*>& fields = ((t_struct*)type)->get_members();
vector<t_field*>::const_iterator f_iter;
const map<t_const_value*, t_const_value*, t_const_value::value_compare>& val = value->get_map();
map<t_const_value*, t_const_value*, t_const_value::value_compare>::const_iterator v_iter;
bool is_nonrequired_field = false;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
t_type* field_type = nullptr;
is_nonrequired_field = false;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_name() == v_iter->first->get_string()) {
field_type = (*f_iter)->get_type();
is_nonrequired_field = (*f_iter)->get_req() != t_field::T_REQUIRED;
}
}
if (field_type == nullptr) {
throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
}
string item_val = render_const_value(out, name, field_type, v_iter->second);
indent(out) << name << "." << v_iter->first->get_string() << " = " << item_val << ";" << '\n';
if (is_nonrequired_field) {
indent(out) << name << ".__isset." << v_iter->first->get_string() << " = true;" << '\n';
}
}
out << '\n';
} else if (type->is_map()) {
t_type* ktype = ((t_map*)type)->get_key_type();
t_type* vtype = ((t_map*)type)->get_val_type();
const map<t_const_value*, t_const_value*, t_const_value::value_compare>& val = value->get_map();
map<t_const_value*, t_const_value*, t_const_value::value_compare>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string key = render_const_value(out, name, ktype, v_iter->first);
string item_val = render_const_value(out, name, vtype, v_iter->second);
indent(out) << name << ".insert(std::make_pair(" << key << ", " << item_val << "));" << '\n';
}
out << '\n';
} else if (type->is_list()) {
t_type* etype = ((t_list*)type)->get_elem_type();
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string item_val = render_const_value(out, name, etype, *v_iter);
indent(out) << name << ".push_back(" << item_val << ");" << '\n';
}
out << '\n';
} else if (type->is_set()) {
t_type* etype = ((t_set*)type)->get_elem_type();
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string item_val = render_const_value(out, name, etype, *v_iter);
indent(out) << name << ".insert(" << item_val << ");" << '\n';
}
out << '\n';
} else {
throw "INVALID TYPE IN print_const_value: " + type->get_name();
}
}
/**
*
*/
string t_cpp_generator::render_const_value(ostream& out,
string name,
t_type* type,
t_const_value* value) {
(void)name;
std::ostringstream render;
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_STRING:
render << '"' << get_escaped_string(value) << '"';
break;
case t_base_type::TYPE_BOOL:
render << ((value->get_integer() > 0) ? "true" : "false");
break;
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
render << value->get_integer();
break;
case t_base_type::TYPE_I64:
render << value->get_integer() << "LL";
break;
case t_base_type::TYPE_DOUBLE:
if (value->get_type() == t_const_value::CV_INTEGER) {
render << "static_cast<double>(" << value->get_integer() << ")";
} else {
render << emit_double_as_string(value->get_double());
}
break;
default:
throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
render << "static_cast<" << type_name(type) << '>'
<< '(' << value->get_integer() << ')';
} else {
string t = tmp("tmp");
indent(out) << type_name(type) << " " << t << ";" << '\n';
print_const_value(out, t, type, value);
render << t;
}
return render.str();
}
void t_cpp_generator::generate_forward_declaration(t_struct* tstruct) {
// Forward declare struct def
f_types_ << indent() << "class " << tstruct->get_name() << ";" << '\n' << '\n';
}
/**
* Generates a struct definition for a thrift data type. This is a class
* with data members and a read/write() function, plus a mirroring isset
* inner class.
*
* @param tstruct The struct definition
*/
void t_cpp_generator::generate_cpp_struct(t_struct* tstruct, bool is_exception) {
generate_struct_declaration(f_types_, tstruct, is_exception, false, true, true, true, true);
generate_struct_definition(f_types_impl_, f_types_impl_, tstruct, true, true, false);
std::ostream& out = (gen_templates_ ? f_types_tcc_ : f_types_impl_);
generate_struct_reader(out, tstruct);
generate_struct_writer(out, tstruct);
generate_struct_swap(f_types_impl_, tstruct);
if (!gen_no_default_operators_) {
generate_equality_operator(f_types_impl_, tstruct);
}
generate_copy_constructor(f_types_impl_, tstruct, is_exception);
if (gen_moveable_) {
generate_move_constructor(f_types_impl_, tstruct, is_exception);
}
generate_assignment_operator(f_types_impl_, tstruct);
if (gen_moveable_) {
generate_move_assignment_operator(f_types_impl_, tstruct);
}
if (!has_custom_ostream(tstruct)) {
generate_struct_print_method(f_types_impl_, tstruct);
}
if (is_exception) {
generate_exception_what_method(f_types_impl_, tstruct);
}
has_members_ = true;
}
void t_cpp_generator::generate_equality_operator(std::ostream& out, t_struct* tstruct) {
// Get members
vector<t_field*>::const_iterator m_iter;
const vector<t_field*>& members = tstruct->get_members();
out << indent() << "bool " << tstruct->get_name()
<< "::operator==(const " << tstruct->get_name() << " & "
<< (members.size() > 0 ? "rhs" : "/* rhs */") << ") const" << '\n';
scope_up(out);
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
// Most existing Thrift code does not use isset or optional/required,
// so we treat "default" fields as required.
if ((*m_iter)->get_req() != t_field::T_OPTIONAL) {
out << indent() << "if (!(" << (*m_iter)->get_name() << " == rhs."
<< (*m_iter)->get_name() << "))" << '\n' << indent() << " return false;" << '\n';
} else {
out << indent() << "if (__isset." << (*m_iter)->get_name() << " != rhs.__isset."
<< (*m_iter)->get_name() << ")" << '\n' << indent() << " return false;" << '\n'
<< indent() << "else if (__isset." << (*m_iter)->get_name() << " && !("
<< (*m_iter)->get_name() << " == rhs." << (*m_iter)->get_name() << "))" << '\n'
<< indent() << " return false;" << '\n';
}
}
indent(out) << "return true;" << '\n';
scope_down(out);
out << '\n';
}
bool t_cpp_generator::has_field_with_default_value(t_struct* tstruct)
{
vector<t_field*>::const_iterator m_iter;
const vector<t_field*>& members = tstruct->get_members();
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
if (is_reference(*m_iter) || t->is_string() || t->is_uuid()) {
t_const_value* cv = (*m_iter)->get_value();
if (cv != nullptr) {
return true;
}
}
}
return false;
}
void t_cpp_generator::generate_default_constructor(ostream& out,
t_struct* tstruct,
bool is_exception) {
// Get members
vector<t_field*>::const_iterator m_iter;
const vector<t_field*>& members = tstruct->get_members();
bool has_default_value = has_field_with_default_value(tstruct);
std::string clsname_ctor = tstruct->get_name() + "::" + tstruct->get_name() + "()";
indent(out) << clsname_ctor << (has_default_value ? "" : " noexcept");
//
// Start generating initializer list
//
bool init_ctor = false;
std::string args_indent(" ");
// Default-initialize TException, if it is our base type
if (is_exception)
{
out << '\n';
indent(out) << " : ";
out << "TException()";
init_ctor = true;
}
// Default-initialize all members that should be initialized in
// the initializer block
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
if (t->is_base_type() || t->is_enum() || is_reference(*m_iter)) {
string dval;
t_const_value* cv = (*m_iter)->get_value();
if (cv != nullptr) {
dval += render_const_value(out, (*m_iter)->get_name(), t, cv);
} else if (t->is_enum()) {
dval += "static_cast<" + type_name(t) + ">(0)";
} else {
dval += (t->is_string() || is_reference(*m_iter) || t->is_uuid()) ? "" : "0";
}
if (!init_ctor) {
init_ctor = true;
if(has_default_value) {
out << " : ";
} else {
out << '\n' << args_indent << ": ";
args_indent.append(" ");
}
} else {
out << ",\n" << args_indent;
}
out << (*m_iter)->get_name() << "(" << dval << ")";
}
}
//
// Start generating body
//
out << " {" << '\n';
indent_up();
// TODO(dreiss): When everything else in Thrift is perfect,
// do more of these in the initializer list.
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
if (!t->is_base_type() && !t->is_enum() && !is_reference(*m_iter)) {
t_const_value* cv = (*m_iter)->get_value();
if (cv != nullptr) {
print_const_value(out, (*m_iter)->get_name(), t, cv);
}
}
}
scope_down(out);
}
void t_cpp_generator::generate_copy_constructor(ostream& out,
t_struct* tstruct,
bool is_exception) {
generate_constructor_helper(out, tstruct, is_exception, /*is_move=*/false);
}
void t_cpp_generator::generate_move_constructor(ostream& out,
t_struct* tstruct,
bool is_exception) {
generate_constructor_helper(out, tstruct, is_exception, /*is_move=*/true);
}
namespace {
// Helper to convert a variable to rvalue, if move is enabled
std::string maybeMove(std::string const& other, bool move) {
if (move) {
return "std::move(" + other + ")";
}
return other;
}
}
void t_cpp_generator::generate_constructor_helper(ostream& out,
t_struct* tstruct,
bool is_exception,
bool is_move) {
std::string tmp_name = tmp("other");
indent(out) << tstruct->get_name() << "::" << tstruct->get_name();
if (is_move) {
out << "(" << tstruct->get_name() << "&& ";
} else {
out << "(const " << tstruct->get_name() << "& ";
}
out << tmp_name << ") ";
if(is_move || is_struct_storage_not_throwing(tstruct))
out << "noexcept ";
if (is_exception)
out << ": TException() ";
out << "{" << '\n';
indent_up();
const vector<t_field*>& members = tstruct->get_members();
// eliminate compiler unused warning
if (members.empty())
indent(out) << "(void) " << tmp_name << ";" << '\n';
vector<t_field*>::const_iterator f_iter;
bool has_nonrequired_fields = false;
for (f_iter = members.begin(); f_iter != members.end(); ++f_iter) {
if ((*f_iter)->get_req() != t_field::T_REQUIRED)
has_nonrequired_fields = true;
indent(out) << (*f_iter)->get_name() << " = "
<< maybeMove(
tmp_name + "." + (*f_iter)->get_name(),
is_move && is_complex_type((*f_iter)->get_type()))
<< ";" << '\n';
}
if (has_nonrequired_fields) {
indent(out) << "__isset = " << maybeMove(tmp_name + ".__isset", false) << ";" << '\n';
}
indent_down();
indent(out) << "}" << '\n';
}
void t_cpp_generator::generate_assignment_operator(ostream& out, t_struct* tstruct) {
generate_assignment_helper(out, tstruct, /*is_move=*/false);
}
void t_cpp_generator::generate_move_assignment_operator(ostream& out, t_struct* tstruct) {
generate_assignment_helper(out, tstruct, /*is_move=*/true);
}
void t_cpp_generator::generate_assignment_helper(ostream& out, t_struct* tstruct, bool is_move) {
std::string tmp_name = tmp("other");
indent(out) << tstruct->get_name() << "& " << tstruct->get_name() << "::operator=(";
if (is_move) {
out << tstruct->get_name() << "&& ";
} else {
out << "const " << tstruct->get_name() << "& ";
}
out << tmp_name << ") ";
if(is_move || is_struct_storage_not_throwing(tstruct))
out << "noexcept ";
out << "{" << '\n';
indent_up();
const vector<t_field*>& members = tstruct->get_members();
// eliminate compiler unused warning
if (members.empty())
indent(out) << "(void) " << tmp_name << ";" << '\n';
vector<t_field*>::const_iterator f_iter;
bool has_nonrequired_fields = false;
for (f_iter = members.begin(); f_iter != members.end(); ++f_iter) {
if ((*f_iter)->get_req() != t_field::T_REQUIRED)
has_nonrequired_fields = true;
indent(out) << (*f_iter)->get_name() << " = "
<< maybeMove(
tmp_name + "." + (*f_iter)->get_name(),
is_move && is_complex_type((*f_iter)->get_type()))
<< ";" << '\n';
}
if (has_nonrequired_fields) {
indent(out) << "__isset = " << maybeMove(tmp_name + ".__isset", false) << ";" << '\n';
}
indent(out) << "return *this;" << '\n';
indent_down();
indent(out) << "}" << '\n';
}
/**
* Writes the struct declaration into the header file
*
* @param out Output stream
* @param tstruct The struct
*/
void t_cpp_generator::generate_struct_declaration(ostream& out,
t_struct* tstruct,
bool is_exception,
bool pointers,
bool read,
bool write,
bool swap,
bool is_user_struct) {
string extends = "";
if (is_exception) {
extends = " : public ::apache::thrift::TException";
} else {
if (is_user_struct && !gen_templates_) {
extends = " : public virtual ::apache::thrift::TBase";
}
}
// Get members
vector<t_field*>::const_iterator m_iter;
const vector<t_field*>& members = tstruct->get_members();
// Write the isset structure declaration outside the class. This makes
// the generated code amenable to processing by SWIG.
// We only declare the struct if it gets used in the class.
// Isset struct has boolean fields, but only for non-required fields.
bool has_nonrequired_fields = false;
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if ((*m_iter)->get_req() != t_field::T_REQUIRED)
has_nonrequired_fields = true;
}
if (has_nonrequired_fields && (!pointers || read)) {
out << indent() << "typedef struct _" << tstruct->get_name() << "__isset {" << '\n';
indent_up();
indent(out) << "_" << tstruct->get_name() << "__isset() ";
bool first = true;
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if ((*m_iter)->get_req() == t_field::T_REQUIRED) {
continue;
}
string isSet = ((*m_iter)->get_value() != nullptr) ? "true" : "false";
if (first) {
first = false;
out << ": " << (*m_iter)->get_name() << "(" << isSet << ")";
} else {
out << ", " << (*m_iter)->get_name() << "(" << isSet << ")";
}
}
out << " {}" << '\n';
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if ((*m_iter)->get_req() != t_field::T_REQUIRED) {
indent(out) << "bool " << (*m_iter)->get_name() << " :1;" << '\n';
}
}
indent_down();
indent(out) << "} _" << tstruct->get_name() << "__isset;" << '\n';
}
out << '\n';
generate_java_doc(out, tstruct);
// Open struct def
out << indent() << "class " << tstruct->get_name() << extends << " {" << '\n' << indent()
<< " public:" << '\n' << '\n';
indent_up();
if (!pointers) {
bool ok_noexcept = is_struct_storage_not_throwing(tstruct);
// Copy constructor
indent(out) << tstruct->get_name() << "(const " << tstruct->get_name() << "&)"
<< (ok_noexcept? " noexcept" : "") << ';' << '\n';
// Move constructor
if (gen_moveable_) {
indent(out) << tstruct->get_name() << "(" << tstruct->get_name() << "&&) noexcept;"
<< '\n';
}
// Assignment Operator
indent(out) << tstruct->get_name() << "& operator=(const " << tstruct->get_name() << "&)"
<< (ok_noexcept? " noexcept" : "") << ';' << '\n';
// Move assignment operator
if (gen_moveable_) {
indent(out) << tstruct->get_name() << "& operator=(" << tstruct->get_name() << "&&) noexcept;"
<< '\n';
}
bool has_default_value = has_field_with_default_value(tstruct);
// Default constructor
std::string clsname_ctor = tstruct->get_name() + "()";
indent(out) << clsname_ctor << (has_default_value ? "" : " noexcept") << ";" << '\n';
}
if (tstruct->annotations_.find("final") == tstruct->annotations_.end()) {
out << '\n' << indent() << "virtual ~" << tstruct->get_name() << "() noexcept;" << '\n';
}
// Declare all fields
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
generate_java_doc(out, *m_iter);
indent(out) << declare_field(*m_iter,
false,
(pointers && !(*m_iter)->get_type()->is_xception()),
!read) << '\n';
}
// Add the __isset data member if we need it, using the definition from above
if (has_nonrequired_fields && (!pointers || read)) {
out << '\n' << indent() << "_" << tstruct->get_name() << "__isset __isset;" << '\n';
}
// Create a setter function for each field
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if (pointers) {
continue;
}
if (is_reference((*m_iter))) {
out << '\n' << indent() << "void __set_" << (*m_iter)->get_name() << "(::std::shared_ptr<"
<< type_name((*m_iter)->get_type(), false, false) << ">";
out << " val);" << '\n';
} else {
out << '\n' << indent() << "void __set_" << (*m_iter)->get_name() << "("
<< type_name((*m_iter)->get_type(), false, true);
out << " val);" << '\n';
}
}
out << '\n';
if (!pointers) {
// Should we generate default operators?
if (!gen_no_default_operators_) {
// Generate an equality testing operator.
out << indent() << "bool operator == (const " << tstruct->get_name() << " & "
<< (members.size() > 0 ? "rhs" : "/* rhs */") << ") const;" << '\n';
out << indent() << "bool operator != (const " << tstruct->get_name() << " &rhs) const {"
<< '\n' << indent() << " return !(*this == rhs);" << '\n' << indent() << "}" << '\n'
<< '\n';
// Generate the declaration of a less-than operator. This must be
// implemented by the application developer if they wish to use it. (They
// will get a link error if they try to use it without an implementation.)
out << indent() << "bool operator < (const " << tstruct->get_name() << " & ) const;" << '\n'
<< '\n';
}
}
if (read) {
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n' << indent()
<< "uint32_t read(Protocol_* iprot);" << '\n';
} else {
out << indent() << "uint32_t read("
<< "::apache::thrift::protocol::TProtocol* iprot)";
if(!is_exception && !extends.empty())
out << " override";
out << ';' << '\n';
}
}
if (write) {
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n' << indent()
<< "uint32_t write(Protocol_* oprot) const;" << '\n';
} else {
out << indent() << "uint32_t write("
<< "::apache::thrift::protocol::TProtocol* oprot) const";
if(!is_exception && !extends.empty())
out << " override";
out << ';' << '\n';
}
}
out << '\n';
if (is_user_struct && !has_custom_ostream(tstruct)) {
out << indent() << "virtual ";
generate_struct_print_method_decl(out, nullptr);
out << ";" << '\n';
}
// std::exception::what()
if (is_exception) {
out << indent() << "mutable std::string thriftTExceptionMessageHolder_;" << '\n';
out << indent();
generate_exception_what_method_decl(out, tstruct, false);
out << ";" << '\n';
}
indent_down();
indent(out) << "};" << '\n' << '\n';
if (swap) {
// Generate a namespace-scope swap() function
if (tstruct->get_name() == "a" || tstruct->get_name() == "b") {
out << indent() << "void swap(" << tstruct->get_name() << " &a1, " << tstruct->get_name()
<< " &a2);" << '\n' << '\n';
} else {
out << indent() << "void swap(" << tstruct->get_name() << " &a, " << tstruct->get_name()
<< " &b);" << '\n' << '\n';
}
}
if (is_user_struct) {
generate_struct_ostream_operator_decl(out, tstruct);
}
}
void t_cpp_generator::generate_struct_definition(ostream& out,
ostream& force_cpp_out,
t_struct* tstruct,
bool setters,
bool is_user_struct,
bool pointers) {
// Get members
vector<t_field*>::const_iterator m_iter;
const vector<t_field*>& members = tstruct->get_members();
// Destructor
if (tstruct->annotations_.find("final") == tstruct->annotations_.end()) {
force_cpp_out << '\n' << indent() << tstruct->get_name() << "::~" << tstruct->get_name()
<< "() noexcept {" << '\n';
indent_up();
indent_down();
force_cpp_out << indent() << "}" << '\n' << '\n';
}
if (!pointers)
{
// 'force_cpp_out' always goes into the .cpp file, and never into a .tcc
// file in case templates are involved. Since the constructor is not templated,
// putting it into the (later included) .tcc file would cause ODR violations.
generate_default_constructor(force_cpp_out, tstruct, false);
}
// Create a setter function for each field
if (setters) {
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if (is_reference((*m_iter))) {
out << '\n' << indent() << "void " << tstruct->get_name() << "::__set_"
<< (*m_iter)->get_name() << "(::std::shared_ptr<"
<< type_name((*m_iter)->get_type(), false, false) << ">";
out << " val) {" << '\n';
} else {
out << '\n' << indent() << "void " << tstruct->get_name() << "::__set_"
<< (*m_iter)->get_name() << "(" << type_name((*m_iter)->get_type(), false, true);
out << " val) {" << '\n';
}
indent_up();
out << indent() << "this->" << (*m_iter)->get_name() << " = val;" << '\n';
indent_down();
// assume all fields are required except optional fields.
// for optional fields change __isset.name to true
bool is_optional = (*m_iter)->get_req() == t_field::T_OPTIONAL;
if (is_optional) {
out << indent() << indent() << "__isset." << (*m_iter)->get_name() << " = true;" << '\n';
}
out << indent() << "}" << '\n';
}
}
if (is_user_struct) {
generate_struct_ostream_operator(out, tstruct);
}
out << '\n';
}
/**
* Makes a helper function to gen a struct reader.
*
* @param out Stream to write to
* @param tstruct The struct
*/
void t_cpp_generator::generate_struct_reader(ostream& out, t_struct* tstruct, bool pointers) {
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n' << indent() << "uint32_t "
<< tstruct->get_name() << "::read(Protocol_* iprot) {" << '\n';
} else {
indent(out) << "uint32_t " << tstruct->get_name()
<< "::read(::apache::thrift::protocol::TProtocol* iprot) {" << '\n';
}
indent_up();
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
// Declare stack tmp variables
out << '\n'
<< indent() << "::apache::thrift::protocol::TInputRecursionTracker tracker(*iprot);" << '\n'
<< indent() << "uint32_t xfer = 0;" << '\n'
<< indent() << "std::string fname;" << '\n'
<< indent() << "::apache::thrift::protocol::TType ftype;" << '\n'
<< indent() << "int16_t fid;" << '\n'
<< '\n'
<< indent() << "xfer += iprot->readStructBegin(fname);" << '\n'
<< '\n'
<< indent() << "using ::apache::thrift::protocol::TProtocolException;" << '\n'
<< '\n';
// Required variables aren't in __isset, so we need tmp vars to check them.
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_req() == t_field::T_REQUIRED)
indent(out) << "bool isset_" << (*f_iter)->get_name() << " = false;" << '\n';
}
out << '\n';
// Loop over reading in fields
indent(out) << "while (true)" << '\n';
scope_up(out);
// Read beginning field marker
indent(out) << "xfer += iprot->readFieldBegin(fname, ftype, fid);" << '\n';
// Check for field STOP marker
out << indent() << "if (ftype == ::apache::thrift::protocol::T_STOP) {" << '\n' << indent()
<< " break;" << '\n' << indent() << "}" << '\n';
if (fields.empty()) {
out << indent() << "xfer += iprot->skip(ftype);" << '\n';
} else {
// Switch statement on the field we are reading
indent(out) << "switch (fid)" << '\n';
scope_up(out);
// Generate deserialization code for known cases
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
indent(out) << "case " << (*f_iter)->get_key() << ":" << '\n';
indent_up();
indent(out) << "if (ftype == " << type_to_enum((*f_iter)->get_type()) << ") {" << '\n';
indent_up();
const char* isset_prefix = ((*f_iter)->get_req() != t_field::T_REQUIRED) ? "this->__isset."
: "isset_";
#if 0
// This code throws an exception if the same field is encountered twice.
// We've decided to leave it out for performance reasons.
// TODO(dreiss): Generate this code and "if" it out to make it easier
// for people recompiling thrift to include it.
out <<
indent() << "if (" << isset_prefix << (*f_iter)->get_name() << ")" << '\n' <<
indent() << " throw TProtocolException(TProtocolException::INVALID_DATA);" << '\n';
#endif
if (pointers && !(*f_iter)->get_type()->is_xception()) {
generate_deserialize_field(out, *f_iter, "(*(this->", "))");
} else {
generate_deserialize_field(out, *f_iter, "this->");
}
out << indent() << isset_prefix << (*f_iter)->get_name() << " = true;" << '\n';
indent_down();
out << indent() << "} else {" << '\n' << indent() << " xfer += iprot->skip(ftype);" << '\n'
<<
// TODO(dreiss): Make this an option when thrift structs
// have a common base class.
// indent() << " throw TProtocolException(TProtocolException::INVALID_DATA);" << '\n' <<
indent() << "}" << '\n' << indent() << "break;" << '\n';
indent_down();
}
// In the default case we skip the field
out << indent() << "default:" << '\n' << indent() << " xfer += iprot->skip(ftype);" << '\n'
<< indent() << " break;" << '\n';
scope_down(out);
} //!fields.empty()
// Read field end marker
indent(out) << "xfer += iprot->readFieldEnd();" << '\n';
scope_down(out);
out << '\n' << indent() << "xfer += iprot->readStructEnd();" << '\n';
// Throw if any required fields are missing.
// We do this after reading the struct end so that
// there might possibly be a chance of continuing.
out << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_req() == t_field::T_REQUIRED)
out << indent() << "if (!isset_" << (*f_iter)->get_name() << ')' << '\n' << indent()
<< " throw TProtocolException(TProtocolException::INVALID_DATA);" << '\n';
}
indent(out) << "return xfer;" << '\n';
indent_down();
indent(out) << "}" << '\n' << '\n';
}
/**
* Generates the write function.
*
* @param out Stream to write to
* @param tstruct The struct
*/
void t_cpp_generator::generate_struct_writer(ostream& out, t_struct* tstruct, bool pointers) {
string name = tstruct->get_name();
const vector<t_field*>& fields = tstruct->get_sorted_members();
vector<t_field*>::const_iterator f_iter;
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n' << indent() << "uint32_t "
<< tstruct->get_name() << "::write(Protocol_* oprot) const {" << '\n';
} else {
indent(out) << "uint32_t " << tstruct->get_name()
<< "::write(::apache::thrift::protocol::TProtocol* oprot) const {" << '\n';
}
indent_up();
out << indent() << "uint32_t xfer = 0;" << '\n';
indent(out) << "::apache::thrift::protocol::TOutputRecursionTracker tracker(*oprot);" << '\n';
indent(out) << "xfer += oprot->writeStructBegin(\"" << name << "\");" << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
bool check_if_set = (*f_iter)->get_req() == t_field::T_OPTIONAL
|| (*f_iter)->get_type()->is_xception();
if (check_if_set) {
out << '\n' << indent() << "if (this->__isset." << (*f_iter)->get_name() << ") {" << '\n';
indent_up();
} else {
out << '\n';
}
// Write field header
out << indent() << "xfer += oprot->writeFieldBegin("
<< "\"" << (*f_iter)->get_name() << "\", " << type_to_enum((*f_iter)->get_type()) << ", "
<< (*f_iter)->get_key() << ");" << '\n';
// Write field contents
if (pointers && !(*f_iter)->get_type()->is_xception()) {
generate_serialize_field(out, *f_iter, "(*(this->", "))");
} else {
generate_serialize_field(out, *f_iter, "this->");
}
// Write field closer
indent(out) << "xfer += oprot->writeFieldEnd();" << '\n';
if (check_if_set) {
indent_down();
indent(out) << '}';
}
}
out << '\n';
// Write the struct map
out << indent() << "xfer += oprot->writeFieldStop();" << '\n' << indent()
<< "xfer += oprot->writeStructEnd();" << '\n' << indent()
<< "return xfer;" << '\n';
indent_down();
indent(out) << "}" << '\n' << '\n';
}
/**
* Struct writer for result of a function, which can have only one of its
* fields set and does a conditional if else look up into the __isset field
* of the struct.
*
* @param out Output stream
* @param tstruct The result struct
*/
void t_cpp_generator::generate_struct_result_writer(ostream& out,
t_struct* tstruct,
bool pointers) {
string name = tstruct->get_name();
const vector<t_field*>& fields = tstruct->get_sorted_members();
vector<t_field*>::const_iterator f_iter;
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n' << indent() << "uint32_t "
<< tstruct->get_name() << "::write(Protocol_* oprot) const {" << '\n';
} else {
indent(out) << "uint32_t " << tstruct->get_name()
<< "::write(::apache::thrift::protocol::TProtocol* oprot) const {" << '\n';
}
indent_up();
out << '\n' << indent() << "uint32_t xfer = 0;" << '\n' << '\n';
indent(out) << "xfer += oprot->writeStructBegin(\"" << name << "\");" << '\n';
bool first = true;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
out << '\n' << indent() << "if ";
} else {
out << " else if ";
}
out << "(this->__isset." << (*f_iter)->get_name() << ") {" << '\n';
indent_up();
// Write field header
out << indent() << "xfer += oprot->writeFieldBegin("
<< "\"" << (*f_iter)->get_name() << "\", " << type_to_enum((*f_iter)->get_type()) << ", "
<< (*f_iter)->get_key() << ");" << '\n';
// Write field contents
if (pointers) {
generate_serialize_field(out, *f_iter, "(*(this->", "))");
} else {
generate_serialize_field(out, *f_iter, "this->");
}
// Write field closer
indent(out) << "xfer += oprot->writeFieldEnd();" << '\n';
indent_down();
indent(out) << "}";
}
// Write the struct map
out << '\n' << indent() << "xfer += oprot->writeFieldStop();" << '\n' << indent()
<< "xfer += oprot->writeStructEnd();" << '\n' << indent() << "return xfer;" << '\n';
indent_down();
indent(out) << "}" << '\n' << '\n';
}
/**
* Generates the swap function.
*
* @param out Stream to write to
* @param tstruct The struct
*/
void t_cpp_generator::generate_struct_swap(ostream& out, t_struct* tstruct) {
if (tstruct->get_name() == "a" || tstruct->get_name() == "b") {
out << indent() << "void swap(" << tstruct->get_name() << " &a1, " << tstruct->get_name()
<< " &a2) {" << '\n';
} else {
out << indent() << "void swap(" << tstruct->get_name() << " &a, " << tstruct->get_name()
<< " &b) {" << '\n';
}
indent_up();
// Let argument-dependent name lookup find the correct swap() function to
// use based on the argument types. If none is found in the arguments'
// namespaces, fall back to ::std::swap().
out << indent() << "using ::std::swap;" << '\n';
bool has_nonrequired_fields = false;
const vector<t_field*>& fields = tstruct->get_members();
for (auto tfield : fields) {
if (tfield->get_req() != t_field::T_REQUIRED) {
has_nonrequired_fields = true;
}
if (tstruct->get_name() == "a" || tstruct->get_name() == "b") {
out << indent() << "swap(a1." << tfield->get_name() << ", a2." << tfield->get_name() << ");"
<< '\n';
} else {
out << indent() << "swap(a." << tfield->get_name() << ", b." << tfield->get_name() << ");"
<< '\n';
}
}
if (has_nonrequired_fields) {
if (tstruct->get_name() == "a" || tstruct->get_name() == "b") {
out << indent() << "swap(a1.__isset, a2.__isset);" << '\n';
} else {
out << indent() << "swap(a.__isset, b.__isset);" << '\n';
}
}
// handle empty structs
if (fields.size() == 0) {
if (tstruct->get_name() == "a" || tstruct->get_name() == "b") {
out << indent() << "(void) a1;" << '\n';
out << indent() << "(void) a2;" << '\n';
} else {
out << indent() << "(void) a;" << '\n';
out << indent() << "(void) b;" << '\n';
}
}
scope_down(out);
out << '\n';
}
void t_cpp_generator::generate_struct_ostream_operator_decl(std::ostream& out, t_struct* tstruct) {
out << "std::ostream& operator<<(std::ostream& out, const "
<< tstruct->get_name()
<< "& obj);" << '\n';
out << '\n';
}
void t_cpp_generator::generate_struct_ostream_operator(std::ostream& out, t_struct* tstruct) {
if (!has_custom_ostream(tstruct)) {
// thrift defines this behavior
out << "std::ostream& operator<<(std::ostream& out, const "
<< tstruct->get_name()
<< "& obj)" << '\n';
scope_up(out);
out << indent() << "obj.printTo(out);" << '\n'
<< indent() << "return out;" << '\n';
scope_down(out);
out << '\n';
}
}
void t_cpp_generator::generate_struct_print_method_decl(std::ostream& out, t_struct* tstruct) {
out << "void ";
if (tstruct) {
out << tstruct->get_name() << "::";
}
out << "printTo(std::ostream& out) const";
}
void t_cpp_generator::generate_exception_what_method_decl(std::ostream& out,
t_struct* tstruct,
bool external) {
out << "const char* ";
if (external) {
out << tstruct->get_name() << "::";
}
out << "what() const noexcept";
if(!external)
out << " override";
}
namespace struct_ostream_operator_generator {
void generate_required_field_value(std::ostream& out, const t_field* field) {
out << " << to_string(" << field->get_name() << ")";
}
void generate_optional_field_value(std::ostream& out, const t_field* field) {
out << "; (__isset." << field->get_name() << " ? (out";
generate_required_field_value(out, field);
out << ") : (out << \"<null>\"))";
}
void generate_field_value(std::ostream& out, const t_field* field) {
if (field->get_req() == t_field::T_OPTIONAL)
generate_optional_field_value(out, field);
else
generate_required_field_value(out, field);
}
void generate_field_name(std::ostream& out, const t_field* field) {
out << "\"" << field->get_name() << "=\"";
}
void generate_field(std::ostream& out, const t_field* field) {
generate_field_name(out, field);
generate_field_value(out, field);
}
void generate_fields(std::ostream& out,
const vector<t_field*>& fields,
const std::string& indent) {
const vector<t_field*>::const_iterator beg = fields.begin();
const vector<t_field*>::const_iterator end = fields.end();
for (vector<t_field*>::const_iterator it = beg; it != end; ++it) {
out << indent << "out << ";
if (it != beg) {
out << "\", \" << ";
}
generate_field(out, *it);
out << ";" << '\n';
}
}
}
/**
* Generates operator<<
*/
void t_cpp_generator::generate_struct_print_method(std::ostream& out, t_struct* tstruct) {
out << indent();
generate_struct_print_method_decl(out, tstruct);
out << " {" << '\n';
indent_up();
out << indent() << "using ::apache::thrift::to_string;" << '\n';
out << indent() << "out << \"" << tstruct->get_name() << "(\";" << '\n';
struct_ostream_operator_generator::generate_fields(out, tstruct->get_members(), indent());
out << indent() << "out << \")\";" << '\n';
indent_down();
out << "}" << '\n' << '\n';
}
/**
* Generates what() method for exceptions
*/
void t_cpp_generator::generate_exception_what_method(std::ostream& out, t_struct* tstruct) {
out << indent();
generate_exception_what_method_decl(out, tstruct, true);
out << " {" << '\n';
indent_up();
out << indent() << "try {" << '\n';
indent_up();
out << indent() << "std::stringstream ss;" << '\n';
out << indent() << "ss << \"TException - service has thrown: \" << *this;" << '\n';
out << indent() << "this->thriftTExceptionMessageHolder_ = ss.str();" << '\n';
out << indent() << "return this->thriftTExceptionMessageHolder_.c_str();" << '\n';
indent_down();
out << indent() << "} catch (const std::exception&) {" << '\n';
indent_up();
out << indent() << "return \"TException - service has thrown: " << tstruct->get_name() << "\";"
<< '\n';
indent_down();
out << indent() << "}" << '\n';
indent_down();
out << "}" << '\n' << '\n';
}
/**
* Generates a thrift service. In C++, this comprises an entirely separate
* header and source file. The header file defines the methods and includes
* the data types defined in the main header file, and the implementation
* file contains implementations of the basic printer and default interfaces.
*
* @param tservice The service definition
*/
void t_cpp_generator::generate_service(t_service* tservice) {
string svcname = tservice->get_name();
// Make output files
string f_header_name = get_out_dir() + svcname + ".h";
f_header_.open(f_header_name.c_str());
// Print header file includes
f_header_ << autogen_comment();
f_header_ << "#ifndef " << svcname << "_H" << '\n' << "#define " << svcname << "_H" << '\n'
<< '\n';
if (gen_cob_style_) {
f_header_ << "#include <thrift/transport/TBufferTransports.h>" << '\n' // TMemoryBuffer
<< "#include <functional>" << '\n'
<< "namespace apache { namespace thrift { namespace async {" << '\n'
<< "class TAsyncChannel;" << '\n' << "}}}" << '\n';
}
f_header_ << "#include <thrift/TDispatchProcessor.h>" << '\n';
if (gen_cob_style_) {
f_header_ << "#include <thrift/async/TAsyncDispatchProcessor.h>" << '\n';
}
f_header_ << "#include <thrift/async/TConcurrentClientSyncInfo.h>" << '\n';
f_header_ << "#include <memory>" << '\n';
f_header_ << "#include \"" << get_include_prefix(*get_program()) << program_name_ << "_types.h\""
<< '\n';
t_service* extends_service = tservice->get_extends();
if (extends_service != nullptr) {
f_header_ << "#include \"" << get_include_prefix(*(extends_service->get_program()))
<< extends_service->get_name() << ".h\"" << '\n';
}
f_header_ << '\n' << ns_open_ << '\n' << '\n';
f_header_ << "#ifdef _MSC_VER\n"
" #pragma warning( push )\n"
" #pragma warning (disable : 4250 ) //inheriting methods via dominance \n"
"#endif\n\n";
// Service implementation file includes
string f_service_name = get_out_dir() + svcname + ".cpp";
f_service_.open(f_service_name.c_str());
f_service_ << autogen_comment();
f_service_ << "#include \"" << get_include_prefix(*get_program()) << svcname << ".h\"" << '\n';
if (gen_cob_style_) {
f_service_ << "#include \"thrift/async/TAsyncChannel.h\"" << '\n';
}
if (gen_templates_) {
f_service_ << "#include \"" << get_include_prefix(*get_program()) << svcname << ".tcc\""
<< '\n';
string f_service_tcc_name = get_out_dir() + svcname + ".tcc";
f_service_tcc_.open(f_service_tcc_name.c_str());
f_service_tcc_ << autogen_comment();
f_service_tcc_ << "#include \"" << get_include_prefix(*get_program()) << svcname << ".h\""
<< '\n';
f_service_tcc_ << "#ifndef " << svcname << "_TCC" << '\n' << "#define " << svcname << "_TCC"
<< '\n' << '\n';
if (gen_cob_style_) {
f_service_tcc_ << "#include \"thrift/async/TAsyncChannel.h\"" << '\n';
}
}
f_service_ << '\n' << ns_open_ << '\n' << '\n';
f_service_tcc_ << '\n' << ns_open_ << '\n' << '\n';
// Generate all the components
generate_service_interface(tservice, "");
generate_service_interface_factory(tservice, "");
generate_service_null(tservice, "");
generate_service_helpers(tservice);
generate_service_client(tservice, "");
generate_service_processor(tservice, "");
generate_service_multiface(tservice);
generate_service_client(tservice, "Concurrent");
// Generate skeleton
if (!gen_no_skeleton_) {
generate_service_skeleton(tservice);
}
// Generate all the cob components
if (gen_cob_style_) {
generate_service_interface(tservice, "CobCl");
generate_service_interface(tservice, "CobSv");
generate_service_interface_factory(tservice, "CobSv");
generate_service_null(tservice, "CobSv");
generate_service_client(tservice, "Cob");
generate_service_processor(tservice, "Cob");
if (!gen_no_skeleton_) {
generate_service_async_skeleton(tservice);
}
}
f_header_ << "#ifdef _MSC_VER\n"
" #pragma warning( pop )\n"
"#endif\n\n";
// Close the namespace
f_service_ << ns_close_ << '\n' << '\n';
f_service_tcc_ << ns_close_ << '\n' << '\n';
f_header_ << ns_close_ << '\n' << '\n';
// TODO(simpkins): Make this a separate option
if (gen_templates_) {
f_header_ << "#include \"" << get_include_prefix(*get_program()) << svcname << ".tcc\"" << '\n'
<< "#include \"" << get_include_prefix(*get_program()) << program_name_
<< "_types.tcc\"" << '\n' << '\n';
}
f_header_ << "#endif" << '\n';
f_service_tcc_ << "#endif" << '\n';
// Close the files
f_service_tcc_.close();
f_service_.close();
f_header_.close();
}
/**
* Generates helper functions for a service. Basically, this generates types
* for all the arguments and results to functions.
*
* @param tservice The service to generate a header definition for
*/
void t_cpp_generator::generate_service_helpers(t_service* tservice) {
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
std::ostream& out = (gen_templates_ ? f_service_tcc_ : f_service_);
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
t_struct* ts = (*f_iter)->get_arglist();
string name_orig = ts->get_name();
// TODO(dreiss): Why is this stuff not in generate_function_helpers?
ts->set_name(tservice->get_name() + "_" + (*f_iter)->get_name() + "_args");
generate_struct_declaration(f_header_, ts, false);
generate_struct_definition(out, f_service_, ts, false);
generate_struct_reader(out, ts);
generate_struct_writer(out, ts);
ts->set_name(tservice->get_name() + "_" + (*f_iter)->get_name() + "_pargs");
generate_struct_declaration(f_header_, ts, false, true, false, true);
generate_struct_definition(out, f_service_, ts, false, false, true);
generate_struct_writer(out, ts, true);
ts->set_name(name_orig);
generate_function_helpers(tservice, *f_iter);
}
}
/**
* Generates a service interface definition.
*
* @param tservice The service to generate a header definition for
*/
void t_cpp_generator::generate_service_interface(t_service* tservice, string style) {
string service_if_name = service_name_ + style + "If";
if (style == "CobCl") {
// Forward declare the client.
string client_name = service_name_ + "CobClient";
if (gen_templates_) {
client_name += "T";
service_if_name += "T";
indent(f_header_) << "template <class Protocol_>" << '\n';
}
indent(f_header_) << "class " << client_name << ";" << '\n' << '\n';
}
string extends = "";
if (tservice->get_extends() != nullptr) {
extends = " : virtual public " + type_name(tservice->get_extends()) + style + "If";
if (style == "CobCl" && gen_templates_) {
// TODO(simpkins): If gen_templates_ is enabled, we currently assume all
// parent services were also generated with templates enabled.
extends += "T<Protocol_>";
}
}
if (style == "CobCl" && gen_templates_) {
f_header_ << "template <class Protocol_>" << '\n';
}
generate_java_doc(f_header_, tservice);
f_header_ << "class " << service_if_name << extends << " {" << '\n' << " public:" << '\n';
indent_up();
f_header_ << indent() << "virtual ~" << service_if_name << "() {}" << '\n';
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
if ((*f_iter)->has_doc())
f_header_ << '\n';
generate_java_doc(f_header_, *f_iter);
f_header_ << indent() << "virtual " << function_signature(*f_iter, style) << " = 0;" << '\n';
}
indent_down();
f_header_ << "};" << '\n' << '\n';
if (style == "CobCl" && gen_templates_) {
// generate a backwards-compatible typedef for clients that do not
// know about the new template-style code
f_header_ << "typedef " << service_if_name << "< ::apache::thrift::protocol::TProtocol> "
<< service_name_ << style << "If;" << '\n' << '\n';
}
}
/**
* Generates a service interface factory.
*
* @param tservice The service to generate an interface factory for.
*/
void t_cpp_generator::generate_service_interface_factory(t_service* tservice, string style) {
string service_if_name = service_name_ + style + "If";
// Figure out the name of the upper-most parent class.
// Getting everything to work out properly with inheritance is annoying.
// Here's what we're doing for now:
//
// - All handlers implement getHandler(), but subclasses use covariant return
// types to return their specific service interface class type. We have to
// use raw pointers because of this; shared_ptr<> can't be used for
// covariant return types.
//
// - Since we're not using shared_ptr<>, we also provide a releaseHandler()
// function that must be called to release a pointer to a handler obtained
// via getHandler().
//
// releaseHandler() always accepts a pointer to the upper-most parent class
// type. This is necessary since the parent versions of releaseHandler()
// may accept any of the parent types, not just the most specific subclass
// type. Implementations can use dynamic_cast to cast the pointer to the
// subclass type if desired.
t_service* base_service = tservice;
while (base_service->get_extends() != nullptr) {
base_service = base_service->get_extends();
}
string base_if_name = type_name(base_service) + style + "If";
// Generate the abstract factory class
string factory_name = service_if_name + "Factory";
string extends;
if (tservice->get_extends() != nullptr) {
extends = " : virtual public " + type_name(tservice->get_extends()) + style + "IfFactory";
}
f_header_ << "class " << factory_name << extends << " {" << '\n' << " public:" << '\n';
indent_up();
f_header_ << indent() << "typedef " << service_if_name << " Handler;" << '\n' << '\n' << indent()
<< "virtual ~" << factory_name << "() {}" << '\n' << '\n' << indent() << "virtual "
<< service_if_name << "* getHandler("
<< "const ::apache::thrift::TConnectionInfo& connInfo)"
<< (extends.empty() ? "" : " override") << " = 0;" << '\n' << indent()
<< "virtual void releaseHandler(" << base_if_name << "* /* handler */)"
<< (extends.empty() ? "" : " override") << " = 0;" << '\n' << indent();
indent_down();
f_header_ << "};" << '\n' << '\n';
// Generate the singleton factory class
string singleton_factory_name = service_if_name + "SingletonFactory";
f_header_ << "class " << singleton_factory_name << " : virtual public " << factory_name << " {"
<< '\n' << " public:" << '\n';
indent_up();
f_header_ << indent() << singleton_factory_name << "(const ::std::shared_ptr<" << service_if_name
<< ">& iface) : iface_(iface) {}" << '\n' << indent() << "virtual ~"
<< singleton_factory_name << "() {}" << '\n' << '\n' << indent() << "virtual "
<< service_if_name << "* getHandler("
<< "const ::apache::thrift::TConnectionInfo&) override {" << '\n' << indent()
<< " return iface_.get();" << '\n' << indent() << "}" << '\n' << indent()
<< "virtual void releaseHandler(" << base_if_name << "* /* handler */) override {}" << '\n';
f_header_ << '\n' << " protected:" << '\n' << indent() << "::std::shared_ptr<" << service_if_name
<< "> iface_;" << '\n';
indent_down();
f_header_ << "};" << '\n' << '\n';
}
/**
* Generates a null implementation of the service.
*
* @param tservice The service to generate a header definition for
*/
void t_cpp_generator::generate_service_null(t_service* tservice, string style) {
string extends = "";
if (tservice->get_extends() != nullptr) {
extends = " , virtual public " + type_name(tservice->get_extends()) + style + "Null";
}
f_header_ << "class " << service_name_ << style << "Null : virtual public " << service_name_
<< style << "If" << extends << " {" << '\n' << " public:" << '\n';
indent_up();
f_header_ << indent() << "virtual ~" << service_name_ << style << "Null() {}" << '\n';
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
f_header_ << indent() << function_signature(*f_iter, style, "", false)
<< " override {" << '\n';
indent_up();
t_type* returntype = (*f_iter)->get_returntype();
t_field returnfield(returntype, "_return");
if (style == "") {
if (returntype->is_void() || is_complex_type(returntype)) {
f_header_ << indent() << "return;" << '\n';
} else {
f_header_ << indent() << declare_field(&returnfield, true) << '\n' << indent()
<< "return _return;" << '\n';
}
} else if (style == "CobSv") {
if (returntype->is_void()) {
f_header_ << indent() << "return cob();" << '\n';
} else {
t_field returnfield(returntype, "_return");
f_header_ << indent() << declare_field(&returnfield, true) << '\n' << indent()
<< "return cob(_return);" << '\n';
}
} else {
throw "UNKNOWN STYLE";
}
indent_down();
f_header_ << indent() << "}" << '\n';
}
indent_down();
f_header_ << "};" << '\n' << '\n';
}
void t_cpp_generator::generate_function_call(ostream& out,
t_function* tfunction,
string target,
string iface,
string arg_prefix) {
bool first = true;
t_type* ret_type = get_true_type(tfunction->get_returntype());
out << indent();
if (!tfunction->is_oneway() && !ret_type->is_void()) {
if (is_complex_type(ret_type)) {
first = false;
out << iface << "->" << tfunction->get_name() << "(" << target;
} else {
out << target << " = " << iface << "->" << tfunction->get_name() << "(";
}
} else {
out << iface << "->" << tfunction->get_name() << "(";
}
const std::vector<t_field*>& fields = tfunction->get_arglist()->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
} else {
out << ", ";
}
out << arg_prefix << (*f_iter)->get_name();
}
out << ");" << '\n';
}
void t_cpp_generator::generate_service_async_skeleton(t_service* tservice) {
string svcname = tservice->get_name();
// Service implementation file includes
string f_skeleton_name = get_out_dir() + svcname + "_async_server.skeleton.cpp";
string ns = namespace_prefix(tservice->get_program()->get_namespace("cpp"));
ofstream_with_content_based_conditional_update f_skeleton;
f_skeleton.open(f_skeleton_name.c_str());
f_skeleton << "// This autogenerated skeleton file illustrates one way to adapt a synchronous"
<< '\n' << "// interface into an asynchronous interface. You should copy it to another"
<< '\n'
<< "// filename to avoid overwriting it and rewrite as asynchronous any functions"
<< '\n' << "// that would otherwise introduce unwanted latency." << '\n' << '\n'
<< "#include \"" << get_include_prefix(*get_program()) << svcname << ".h\"" << '\n'
<< "#include <thrift/protocol/TBinaryProtocol.h>" << '\n'
<< "#include <thrift/async/TAsyncProtocolProcessor.h>" << '\n'
<< "#include <thrift/async/TEvhttpServer.h>" << '\n'
<< "#include <event.h>" << '\n'
<< "#include <evhttp.h>" << '\n' << '\n'
<< "using namespace ::apache::thrift;" << '\n'
<< "using namespace ::apache::thrift::protocol;" << '\n'
<< "using namespace ::apache::thrift::transport;" << '\n'
<< "using namespace ::apache::thrift::async;" << '\n' << '\n';
// the following code would not compile:
// using namespace ;
// using namespace ::;
if ((!ns.empty()) && (ns.compare(" ::") != 0)) {
f_skeleton << "using namespace " << string(ns, 0, ns.size() - 2) << ";" << '\n' << '\n';
}
f_skeleton << "class " << svcname << "Handler : virtual public " << svcname << "If {" << '\n'
<< " public:" << '\n';
indent_up();
f_skeleton << indent() << svcname << "Handler() {" << '\n' << indent()
<< " // Your initialization goes here" << '\n' << indent() << "}" << '\n' << '\n';
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
generate_java_doc(f_skeleton, *f_iter);
f_skeleton << indent() << function_signature(*f_iter, "") << " {" << '\n' << indent()
<< " // Your implementation goes here" << '\n' << indent() << " printf(\""
<< (*f_iter)->get_name() << "\\n\");" << '\n' << indent() << "}" << '\n' << '\n';
}
indent_down();
f_skeleton << "};" << '\n' << '\n';
f_skeleton << "class " << svcname << "AsyncHandler : "
<< "public " << svcname << "CobSvIf {" << '\n' << " public:" << '\n';
indent_up();
f_skeleton << indent() << svcname << "AsyncHandler() {" << '\n' << indent()
<< " syncHandler_ = std::unique_ptr<" << svcname << "Handler>(new " << svcname
<< "Handler);" << '\n' << indent() << " // Your initialization goes here" << '\n'
<< indent() << "}" << '\n';
f_skeleton << indent() << "virtual ~" << service_name_ << "AsyncHandler();" << '\n';
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
f_skeleton << '\n' << indent() << function_signature(*f_iter, "CobSv", "", true) << " {"
<< '\n';
indent_up();
t_type* returntype = (*f_iter)->get_returntype();
t_field returnfield(returntype, "_return");
string target = returntype->is_void() ? "" : "_return";
if (!returntype->is_void()) {
f_skeleton << indent() << declare_field(&returnfield, true) << '\n';
}
generate_function_call(f_skeleton, *f_iter, target, "syncHandler_", "");
f_skeleton << indent() << "return cob(" << target << ");" << '\n';
scope_down(f_skeleton);
}
f_skeleton << '\n' << " protected:" << '\n' << indent() << "std::unique_ptr<" << svcname
<< "Handler> syncHandler_;" << '\n';
indent_down();
f_skeleton << "};" << '\n' << '\n';
f_skeleton << indent() << "int main(int argc, char **argv) {" << '\n';
indent_up();
f_skeleton
<< indent() << "int port = 9090;" << '\n' << indent() << "::std::shared_ptr<" << svcname
<< "AsyncHandler> handler(new " << svcname << "AsyncHandler());" << '\n' << indent()
<< "::std::shared_ptr<" << svcname << "AsyncProcessor> processor(new " << svcname << "AsyncProcessor(handler));" << '\n'
<< indent() << "::std::shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());"
<< '\n'
<< indent() << "::std::shared_ptr<TAsyncProtocolProcessor> protocolProcessor(new TAsyncProtocolProcessor(processor, protocolFactory));"
<< '\n' << '\n' << indent()
<< "TEvhttpServer server(protocolProcessor, port);"
<< '\n' << indent() << "server.serve();" << '\n' << indent() << "return 0;" << '\n';
indent_down();
f_skeleton << "}" << '\n' << '\n';
}
/**
* Generates a multiface, which is a single server that just takes a set
* of objects implementing the interface and calls them all, returning the
* value of the last one to be called.
*
* @param tservice The service to generate a multiserver for.
*/
void t_cpp_generator::generate_service_multiface(t_service* tservice) {
// Generate the dispatch methods
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
string extends = "";
string extends_multiface = "";
if (tservice->get_extends() != nullptr) {
extends = type_name(tservice->get_extends());
extends_multiface = ", public " + extends + "Multiface";
}
string list_type = string("std::vector<std::shared_ptr<") + service_name_ + "If> >";
// Generate the header portion
f_header_ << "class " << service_name_ << "Multiface : "
<< "virtual public " << service_name_ << "If" << extends_multiface << " {" << '\n'
<< " public:" << '\n';
indent_up();
f_header_ << indent() << service_name_ << "Multiface(" << list_type
<< "& ifaces) : ifaces_(ifaces) {" << '\n';
if (!extends.empty()) {
f_header_ << indent()
<< " std::vector<std::shared_ptr<" + service_name_ + "If> >::iterator iter;"
<< '\n' << indent() << " for (iter = ifaces.begin(); iter != ifaces.end(); ++iter) {"
<< '\n' << indent() << " " << extends << "Multiface::add(*iter);" << '\n'
<< indent() << " }" << '\n';
}
f_header_ << indent() << "}" << '\n' << indent() << "virtual ~" << service_name_
<< "Multiface() {}" << '\n';
indent_down();
// Protected data members
f_header_ << " protected:" << '\n';
indent_up();
f_header_ << indent() << list_type << " ifaces_;" << '\n' << indent() << service_name_
<< "Multiface() {}" << '\n' << indent() << "void add(::std::shared_ptr<"
<< service_name_ << "If> iface) {" << '\n';
if (!extends.empty()) {
f_header_ << indent() << " " << extends << "Multiface::add(iface);" << '\n';
}
f_header_ << indent() << " ifaces_.push_back(iface);" << '\n' << indent() << "}" << '\n';
indent_down();
f_header_ << indent() << " public:" << '\n';
indent_up();
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
generate_java_doc(f_header_, *f_iter);
t_struct* arglist = (*f_iter)->get_arglist();
const vector<t_field*>& args = arglist->get_members();
vector<t_field*>::const_iterator a_iter;
string call = string("ifaces_[i]->") + (*f_iter)->get_name() + "(";
bool first = true;
if (is_complex_type((*f_iter)->get_returntype())) {
call += "_return";
first = false;
}
for (a_iter = args.begin(); a_iter != args.end(); ++a_iter) {
if (first) {
first = false;
} else {
call += ", ";
}
call += (*a_iter)->get_name();
}
call += ")";
f_header_ << indent() << function_signature(*f_iter, "") << " override {" << '\n';
indent_up();
f_header_ << indent() << "size_t sz = ifaces_.size();" << '\n' << indent() << "size_t i = 0;"
<< '\n' << indent() << "for (; i < (sz - 1); ++i) {" << '\n';
indent_up();
f_header_ << indent() << call << ";" << '\n';
indent_down();
f_header_ << indent() << "}" << '\n';
if (!(*f_iter)->get_returntype()->is_void()) {
if (is_complex_type((*f_iter)->get_returntype())) {
f_header_ << indent() << call << ";" << '\n' << indent() << "return;" << '\n';
} else {
f_header_ << indent() << "return " << call << ";" << '\n';
}
} else {
f_header_ << indent() << call << ";" << '\n';
}
indent_down();
f_header_ << indent() << "}" << '\n' << '\n';
}
indent_down();
f_header_ << indent() << "};" << '\n' << '\n';
}
/**
* Generates a service client definition.
*
* @param tservice The service to generate a server for.
*/
void t_cpp_generator::generate_service_client(t_service* tservice, string style) {
string ifstyle;
if (style == "Cob") {
ifstyle = "CobCl";
}
std::ostream& out = (gen_templates_ ? f_service_tcc_ : f_service_);
string template_header, template_suffix, short_suffix, protocol_type, _this;
string const prot_factory_type = "::apache::thrift::protocol::TProtocolFactory";
if (gen_templates_) {
template_header = "template <class Protocol_>\n";
short_suffix = "T";
template_suffix = "T<Protocol_>";
protocol_type = "Protocol_";
_this = "this->";
} else {
protocol_type = "::apache::thrift::protocol::TProtocol";
}
string prot_ptr = "std::shared_ptr< " + protocol_type + ">";
string client_suffix = "Client" + template_suffix;
string if_suffix = "If";
if (style == "Cob") {
if_suffix += template_suffix;
}
string extends = "";
string extends_client = "";
if (tservice->get_extends() != nullptr) {
// TODO(simpkins): If gen_templates_ is enabled, we currently assume all
// parent services were also generated with templates enabled.
extends = type_name(tservice->get_extends());
extends_client = ", public " + extends + style + client_suffix;
}
// Generate the header portion
if (style == "Concurrent") {
f_header_ << "// The \'concurrent\' client is a thread safe client that correctly handles\n"
"// out of order responses. It is slower than the regular client, so should\n"
"// only be used when you need to share a connection among multiple threads\n";
}
f_header_ << template_header << "class " << service_name_ << style << "Client" << short_suffix
<< " : "
<< "virtual public " << service_name_ << ifstyle << if_suffix << extends_client << " {"
<< '\n' << " public:" << '\n';
indent_up();
if (style != "Cob") {
f_header_ << indent() << service_name_ << style << "Client" << short_suffix << "(" << prot_ptr
<< " prot";
if (style == "Concurrent") {
f_header_ << ", std::shared_ptr< ::apache::thrift::async::TConcurrentClientSyncInfo> sync";
}
f_header_ << ") ";
if (extends.empty()) {
if (style == "Concurrent") {
f_header_ << ": sync_(sync)" << '\n';
}
f_header_ << "{" << '\n';
f_header_ << indent() << " setProtocol" << short_suffix << "(prot);" << '\n' << indent()
<< "}" << '\n';
} else {
f_header_ << ":" << '\n';
f_header_ << indent() << " " << extends << style << client_suffix << "(prot, prot";
if (style == "Concurrent") {
f_header_ << ", sync";
}
f_header_ << ") {}" << '\n';
}
f_header_ << indent() << service_name_ << style << "Client" << short_suffix << "(" << prot_ptr
<< " iprot, " << prot_ptr << " oprot";
if (style == "Concurrent") {
f_header_ << ", std::shared_ptr< ::apache::thrift::async::TConcurrentClientSyncInfo> sync";
}
f_header_ << ") ";
if (extends.empty()) {
if (style == "Concurrent") {
f_header_ << ": sync_(sync)" << '\n';
}
f_header_ << "{" << '\n';
f_header_ << indent() << " setProtocol" << short_suffix << "(iprot,oprot);" << '\n'
<< indent() << "}" << '\n';
} else {
f_header_ << ":" << indent() << " " << extends << style << client_suffix
<< "(iprot, oprot";
if (style == "Concurrent") {
f_header_ << ", sync";
}
f_header_ << ") {}" << '\n';
}
// create the setProtocol methods
if (extends.empty()) {
f_header_ << " private:" << '\n';
// 1: one parameter
f_header_ << indent() << "void setProtocol" << short_suffix << "(" << prot_ptr << " prot) {"
<< '\n';
f_header_ << indent() << "setProtocol" << short_suffix << "(prot,prot);" << '\n';
f_header_ << indent() << "}" << '\n';
// 2: two parameter
f_header_ << indent() << "void setProtocol" << short_suffix << "(" << prot_ptr << " iprot, "
<< prot_ptr << " oprot) {" << '\n';
f_header_ << indent() << " piprot_=iprot;" << '\n' << indent() << " poprot_=oprot;" << '\n'
<< indent() << " iprot_ = iprot.get();" << '\n' << indent()
<< " oprot_ = oprot.get();" << '\n';
f_header_ << indent() << "}" << '\n';
f_header_ << " public:" << '\n';
}
// Generate getters for the protocols.
// Note that these are not currently templated for simplicity.
// TODO(simpkins): should they be templated?
f_header_ << indent()
<< "std::shared_ptr< ::apache::thrift::protocol::TProtocol> getInputProtocol() {"
<< '\n' << indent() << " return " << _this << "piprot_;" << '\n' << indent() << "}"
<< '\n';
f_header_ << indent()
<< "std::shared_ptr< ::apache::thrift::protocol::TProtocol> getOutputProtocol() {"
<< '\n' << indent() << " return " << _this << "poprot_;" << '\n' << indent() << "}"
<< '\n';
} else /* if (style == "Cob") */ {
f_header_ << indent() << service_name_ << style << "Client" << short_suffix << "("
<< "std::shared_ptr< ::apache::thrift::async::TAsyncChannel> channel, "
<< "::apache::thrift::protocol::TProtocolFactory* protocolFactory) :" << '\n';
if (extends.empty()) {
f_header_ << indent() << " channel_(channel)," << '\n' << indent()
<< " itrans_(new ::apache::thrift::transport::TMemoryBuffer())," << '\n'
<< indent() << " otrans_(new ::apache::thrift::transport::TMemoryBuffer()),"
<< '\n';
if (gen_templates_) {
// TProtocolFactory classes return generic TProtocol pointers.
// We have to dynamic cast to the Protocol_ type we are expecting.
f_header_ << indent() << " piprot_(::std::dynamic_pointer_cast<Protocol_>("
<< "protocolFactory->getProtocol(itrans_)))," << '\n' << indent()
<< " poprot_(::std::dynamic_pointer_cast<Protocol_>("
<< "protocolFactory->getProtocol(otrans_))) {" << '\n';
// Throw a TException if either dynamic cast failed.
f_header_ << indent() << " if (!piprot_ || !poprot_) {" << '\n' << indent()
<< " throw ::apache::thrift::TException(\""
<< "TProtocolFactory returned unexpected protocol type in " << service_name_
<< style << "Client" << short_suffix << " constructor\");" << '\n' << indent()
<< " }" << '\n';
} else {
f_header_ << indent() << " piprot_(protocolFactory->getProtocol(itrans_))," << '\n'
<< indent() << " poprot_(protocolFactory->getProtocol(otrans_)) {" << '\n';
}
f_header_ << indent() << " iprot_ = piprot_.get();" << '\n' << indent()
<< " oprot_ = poprot_.get();" << '\n' << indent() << "}" << '\n';
} else {
f_header_ << indent() << " " << extends << style << client_suffix
<< "(channel, protocolFactory) {}" << '\n';
}
}
if (style == "Cob") {
generate_java_doc(f_header_, tservice);
f_header_ << indent()
<< "::std::shared_ptr< ::apache::thrift::async::TAsyncChannel> getChannel() {" << '\n'
<< indent() << " return " << _this << "channel_;" << '\n' << indent() << "}" << '\n';
if (!gen_no_client_completion_) {
f_header_ << indent() << "virtual void completed__(bool /* success */) {}" << '\n';
}
}
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::const_iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
generate_java_doc(f_header_, *f_iter);
indent(f_header_) << function_signature(*f_iter, ifstyle)
<< " override;" << '\n';
// TODO(dreiss): Use private inheritance to avoid generating thise in cob-style.
if (style == "Concurrent" && !(*f_iter)->is_oneway()) {
// concurrent clients need to move the seqid from the send function to the
// recv function. Oneway methods don't have a recv function, so we don't need to
// move the seqid for them. Attempting to do so would result in a seqid leak.
t_function send_function(g_type_i32, /*returning seqid*/
string("send_") + (*f_iter)->get_name(),
(*f_iter)->get_arglist());
indent(f_header_) << function_signature(&send_function, "") << ";" << '\n';
} else {
t_function send_function(g_type_void,
string("send_") + (*f_iter)->get_name(),
(*f_iter)->get_arglist());
indent(f_header_) << function_signature(&send_function, "") << ";" << '\n';
}
if (!(*f_iter)->is_oneway()) {
if (style == "Concurrent") {
t_field seqIdArg(g_type_i32, "seqid");
t_struct seqIdArgStruct(program_);
seqIdArgStruct.append(&seqIdArg);
t_function recv_function((*f_iter)->get_returntype(),
string("recv_") + (*f_iter)->get_name(),
&seqIdArgStruct);
indent(f_header_) << function_signature(&recv_function, "") << ";" << '\n';
} else {
t_struct noargs(program_);
t_function recv_function((*f_iter)->get_returntype(),
string("recv_") + (*f_iter)->get_name(),
&noargs);
indent(f_header_) << function_signature(&recv_function, "") << ";" << '\n';
}
}
}
indent_down();
if (extends.empty()) {
f_header_ << " protected:" << '\n';
indent_up();
if (style == "Cob") {
f_header_ << indent()
<< "::std::shared_ptr< ::apache::thrift::async::TAsyncChannel> channel_;" << '\n'
<< indent()
<< "::std::shared_ptr< ::apache::thrift::transport::TMemoryBuffer> itrans_;" << '\n'
<< indent()
<< "::std::shared_ptr< ::apache::thrift::transport::TMemoryBuffer> otrans_;"
<< '\n';
}
f_header_ <<
indent() << prot_ptr << " piprot_;" << '\n' <<
indent() << prot_ptr << " poprot_;" << '\n' <<
indent() << protocol_type << "* iprot_;" << '\n' <<
indent() << protocol_type << "* oprot_;" << '\n';
if (style == "Concurrent") {
f_header_ <<
indent() << "std::shared_ptr< ::apache::thrift::async::TConcurrentClientSyncInfo> sync_;" << '\n';
}
indent_down();
}
f_header_ << "};" << '\n' << '\n';
if (gen_templates_) {
// Output a backwards compatibility typedef using
// TProtocol as the template parameter.
f_header_ << "typedef " << service_name_ << style
<< "ClientT< ::apache::thrift::protocol::TProtocol> " << service_name_ << style
<< "Client;" << '\n' << '\n';
}
string scope = service_name_ + style + client_suffix + "::";
// Generate client method implementations
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
string seqIdCapture;
string seqIdUse;
string seqIdCommaUse;
if (style == "Concurrent" && !(*f_iter)->is_oneway()) {
seqIdCapture = "int32_t seqid = ";
seqIdUse = "seqid";
seqIdCommaUse = ", seqid";
}
string funname = (*f_iter)->get_name();
// Open function
if (gen_templates_) {
indent(out) << template_header;
}
indent(out) << function_signature(*f_iter, ifstyle, scope) << '\n';
scope_up(out);
indent(out) << seqIdCapture << "send_" << funname << "(";
// Get the struct of function call params
t_struct* arg_struct = (*f_iter)->get_arglist();
// Declare the function arguments
const vector<t_field*>& fields = arg_struct->get_members();
vector<t_field*>::const_iterator fld_iter;
bool first = true;
for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
if (first) {
first = false;
} else {
out << ", ";
}
out << (*fld_iter)->get_name();
}
out << ");" << '\n';
if (style != "Cob") {
if (!(*f_iter)->is_oneway()) {
out << indent();
if (!(*f_iter)->get_returntype()->is_void()) {
if (is_complex_type((*f_iter)->get_returntype())) {
out << "recv_" << funname << "(_return" << seqIdCommaUse << ");" << '\n';
} else {
out << "return recv_" << funname << "(" << seqIdUse << ");" << '\n';
}
} else {
out << "recv_" << funname << "(" << seqIdUse << ");" << '\n';
}
}
} else {
if (!(*f_iter)->is_oneway()) {
out << indent() << _this << "channel_->sendAndRecvMessage("
<< "::std::bind(cob, this), " << _this << "otrans_.get(), " << _this << "itrans_.get());"
<< '\n';
} else {
out << indent() << _this << "channel_->sendMessage("
<< "::std::bind(cob, this), " << _this << "otrans_.get());" << '\n';
}
}
scope_down(out);
out << '\n';
// if (style != "Cob") // TODO(dreiss): Libify the client and don't generate this for cob-style
if (true) {
t_type* send_func_return_type = g_type_void;
if (style == "Concurrent" && !(*f_iter)->is_oneway()) {
send_func_return_type = g_type_i32;
}
// Function for sending
t_function send_function(send_func_return_type,
string("send_") + (*f_iter)->get_name(),
(*f_iter)->get_arglist());
// Open the send function
if (gen_templates_) {
indent(out) << template_header;
}
indent(out) << function_signature(&send_function, "", scope) << '\n';
scope_up(out);
// Function arguments and results
string argsname = tservice->get_name() + "_" + (*f_iter)->get_name() + "_pargs";
string resultname = tservice->get_name() + "_" + (*f_iter)->get_name() + "_presult";
string cseqidVal = "0";
if (style == "Concurrent") {
if (!(*f_iter)->is_oneway()) {
cseqidVal = "this->sync_->generateSeqId()";
}
}
// Serialize the request
out <<
indent() << "int32_t cseqid = " << cseqidVal << ";" << '\n';
if(style == "Concurrent") {
out <<
indent() << "::apache::thrift::async::TConcurrentSendSentry sentry(this->sync_.get());" << '\n';
}
if (style == "Cob") {
out <<
indent() << _this << "otrans_->resetBuffer();" << '\n';
}
out <<
indent() << _this << "oprot_->writeMessageBegin(\"" <<
(*f_iter)->get_name() <<
"\", ::apache::thrift::protocol::" << ((*f_iter)->is_oneway() ? "T_ONEWAY" : "T_CALL") <<
", cseqid);" << '\n' << '\n' <<
indent() << argsname << " args;" << '\n';
for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
out << indent() << "args." << (*fld_iter)->get_name() << " = &" << (*fld_iter)->get_name()
<< ";" << '\n';
}
out << indent() << "args.write(" << _this << "oprot_);" << '\n' << '\n' << indent() << _this
<< "oprot_->writeMessageEnd();" << '\n' << indent() << _this
<< "oprot_->getTransport()->writeEnd();" << '\n' << indent() << _this
<< "oprot_->getTransport()->flush();" << '\n';
if (style == "Concurrent") {
out << '\n' << indent() << "sentry.commit();" << '\n';
if (!(*f_iter)->is_oneway()) {
out << indent() << "return cseqid;" << '\n';
}
}
scope_down(out);
out << '\n';
// Generate recv function only if not an oneway function
if (!(*f_iter)->is_oneway()) {
t_struct noargs(program_);
t_field seqIdArg(g_type_i32, "seqid");
t_struct seqIdArgStruct(program_);
seqIdArgStruct.append(&seqIdArg);
t_struct* recv_function_args = &noargs;
if (style == "Concurrent") {
recv_function_args = &seqIdArgStruct;
}
t_function recv_function((*f_iter)->get_returntype(),
string("recv_") + (*f_iter)->get_name(),
recv_function_args);
// Open the recv function
if (gen_templates_) {
indent(out) << template_header;
}
indent(out) << function_signature(&recv_function, "", scope) << '\n';
scope_up(out);
out << '\n' <<
indent() << "int32_t rseqid = 0;" << '\n' <<
indent() << "std::string fname;" << '\n' <<
indent() << "::apache::thrift::protocol::TMessageType mtype;" << '\n';
if(style == "Concurrent") {
out << '\n' <<
indent() << "// the read mutex gets dropped and reacquired as part of waitForWork()" << '\n' <<
indent() << "// The destructor of this sentry wakes up other clients" << '\n' <<
indent() << "::apache::thrift::async::TConcurrentRecvSentry sentry(this->sync_.get(), seqid);" << '\n';
}
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << "bool completed = false;" << '\n' << '\n' << indent() << "try {";
indent_up();
}
out << '\n';
if (style == "Concurrent") {
out <<
indent() << "while(true) {" << '\n' <<
indent() << " if(!this->sync_->getPending(fname, mtype, rseqid)) {" << '\n';
indent_up();
indent_up();
}
out <<
indent() << _this << "iprot_->readMessageBegin(fname, mtype, rseqid);" << '\n';
if (style == "Concurrent") {
scope_down(out);
out << indent() << "if(seqid == rseqid) {" << '\n';
indent_up();
}
out <<
indent() << "if (mtype == ::apache::thrift::protocol::T_EXCEPTION) {" << '\n' <<
indent() << " ::apache::thrift::TApplicationException x;" << '\n' <<
indent() << " x.read(" << _this << "iprot_);" << '\n' <<
indent() << " " << _this << "iprot_->readMessageEnd();" << '\n' <<
indent() << " " << _this << "iprot_->getTransport()->readEnd();" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << " sentry.commit();" << '\n';
}
out <<
indent() << " throw x;" << '\n' <<
indent() << "}" << '\n' <<
indent() << "if (mtype != ::apache::thrift::protocol::T_REPLY) {" << '\n' <<
indent() << " " << _this << "iprot_->skip(" << "::apache::thrift::protocol::T_STRUCT);" << '\n' <<
indent() << " " << _this << "iprot_->readMessageEnd();" << '\n' <<
indent() << " " << _this << "iprot_->getTransport()->readEnd();" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(false);"
<< '\n';
}
out <<
indent() << "}" << '\n' <<
indent() << "if (fname.compare(\"" << (*f_iter)->get_name() << "\") != 0) {" << '\n' <<
indent() << " " << _this << "iprot_->skip(" << "::apache::thrift::protocol::T_STRUCT);" << '\n' <<
indent() << " " << _this << "iprot_->readMessageEnd();" << '\n' <<
indent() << " " << _this << "iprot_->getTransport()->readEnd();" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(false);"
<< '\n';
}
if (style == "Concurrent") {
out << '\n' <<
indent() << " // in a bad state, don't commit" << '\n' <<
indent() << " using ::apache::thrift::protocol::TProtocolException;" << '\n' <<
indent() << " throw TProtocolException(TProtocolException::INVALID_DATA);" << '\n';
}
out << indent() << "}" << '\n';
if (!(*f_iter)->get_returntype()->is_void()
&& !is_complex_type((*f_iter)->get_returntype())) {
t_field returnfield((*f_iter)->get_returntype(), "_return");
out << indent() << declare_field(&returnfield) << '\n';
}
out << indent() << resultname << " result;" << '\n';
if (!(*f_iter)->get_returntype()->is_void()) {
out << indent() << "result.success = &_return;" << '\n';
}
out << indent() << "result.read(" << _this << "iprot_);" << '\n' << indent() << _this
<< "iprot_->readMessageEnd();" << '\n' << indent() << _this
<< "iprot_->getTransport()->readEnd();" << '\n' << '\n';
// Careful, only look for _result if not a void function
if (!(*f_iter)->get_returntype()->is_void()) {
if (is_complex_type((*f_iter)->get_returntype())) {
out <<
indent() << "if (result.__isset.success) {" << '\n';
out <<
indent() << " // _return pointer has now been filled" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << " sentry.commit();" << '\n';
}
out <<
indent() << " return;" << '\n' <<
indent() << "}" << '\n';
} else {
out << indent() << "if (result.__isset.success) {" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << " sentry.commit();" << '\n';
}
out << indent() << " return _return;" << '\n' << indent() << "}" << '\n';
}
}
t_struct* xs = (*f_iter)->get_xceptions();
const std::vector<t_field*>& xceptions = xs->get_members();
vector<t_field*>::const_iterator x_iter;
for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
out << indent() << "if (result.__isset." << (*x_iter)->get_name() << ") {" << '\n';
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << " completed = true;" << '\n' << indent() << " completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << " sentry.commit();" << '\n';
}
out << indent() << " throw result." << (*x_iter)->get_name() << ";" << '\n' << indent()
<< "}" << '\n';
}
// We only get here if we are a void function
if ((*f_iter)->get_returntype()->is_void()) {
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << "completed = true;" << '\n' << indent() << "completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << "sentry.commit();" << '\n';
}
indent(out) << "return;" << '\n';
} else {
if (style == "Cob" && !gen_no_client_completion_) {
out << indent() << "completed = true;" << '\n' << indent() << "completed__(true);"
<< '\n';
}
if (style == "Concurrent") {
out << indent() << "// in a bad state, don't commit" << '\n';
}
out << indent() << "throw "
"::apache::thrift::TApplicationException(::apache::thrift::"
"TApplicationException::MISSING_RESULT, \"" << (*f_iter)->get_name()
<< " failed: unknown result\");" << '\n';
}
if (style == "Concurrent") {
indent_down();
indent_down();
out << indent() << " }" << '\n'
<< indent() << " // seqid != rseqid" << '\n'
<< indent() << " this->sync_->updatePending(fname, mtype, rseqid);" << '\n'
<< '\n'
<< indent()
<< " // this will temporarily unlock the readMutex, and let other clients get work done" << '\n'
<< indent() << " this->sync_->waitForWork(seqid);" << '\n'
<< indent() << "} // end while(true)" << '\n';
}
if (style == "Cob" && !gen_no_client_completion_) {
indent_down();
out << indent() << "} catch (...) {" << '\n' << indent() << " if (!completed) {" << '\n'
<< indent() << " completed__(false);" << '\n' << indent() << " }" << '\n'
<< indent() << " throw;" << '\n' << indent() << "}" << '\n';
}
// Close function
scope_down(out);
out << '\n';
}
}
}
}
class ProcessorGenerator {
public:
ProcessorGenerator(t_cpp_generator* generator, t_service* service, const string& style);
void run() {
generate_class_definition();
// Generate the dispatchCall() function
generate_dispatch_call(false);
if (generator_->gen_templates_) {
generate_dispatch_call(true);
}
// Generate all of the process subfunctions
generate_process_functions();
generate_factory();
}
void generate_class_definition();
void generate_dispatch_call(bool template_protocol);
void generate_process_functions();
void generate_factory();
protected:
std::string type_name(t_type* ttype, bool in_typedef = false, bool arg = false) {
return generator_->type_name(ttype, in_typedef, arg);
}
std::string indent() { return generator_->indent(); }
std::ostream& indent(std::ostream& os) { return generator_->indent(os); }
void indent_up() { generator_->indent_up(); }
void indent_down() { generator_->indent_down(); }
t_cpp_generator* generator_;
t_service* service_;
std::ostream& f_header_;
std::ostream& f_out_;
string service_name_;
string style_;
string pstyle_;
string class_name_;
string if_name_;
string factory_class_name_;
string finish_cob_;
string finish_cob_decl_;
string ret_type_;
string call_context_;
string cob_arg_;
string call_context_arg_;
string call_context_decl_;
string template_header_;
string template_suffix_;
string typename_str_;
string class_suffix_;
string extends_;
};
ProcessorGenerator::ProcessorGenerator(t_cpp_generator* generator,
t_service* service,
const string& style)
: generator_(generator),
service_(service),
f_header_(generator->f_header_),
f_out_(generator->gen_templates_ ? generator->f_service_tcc_ : generator->f_service_),
service_name_(generator->service_name_),
style_(style) {
if (style_ == "Cob") {
pstyle_ = "Async";
class_name_ = service_name_ + pstyle_ + "Processor";
if_name_ = service_name_ + "CobSvIf";
finish_cob_ = "::std::function<void(bool ok)> cob, ";
finish_cob_decl_ = "::std::function<void(bool ok)>, ";
cob_arg_ = "cob, ";
ret_type_ = "void ";
} else {
class_name_ = service_name_ + "Processor";
if_name_ = service_name_ + "If";
ret_type_ = "bool ";
// TODO(edhall) callContext should eventually be added to TAsyncProcessor
call_context_ = ", void* callContext";
call_context_arg_ = ", callContext";
call_context_decl_ = ", void*";
}
factory_class_name_ = class_name_ + "Factory";
if (generator->gen_templates_) {
template_header_ = "template <class Protocol_>\n";
template_suffix_ = "<Protocol_>";
typename_str_ = "typename ";
class_name_ += "T";
factory_class_name_ += "T";
}
if (service_->get_extends() != nullptr) {
extends_ = type_name(service_->get_extends()) + pstyle_ + "Processor";
if (generator_->gen_templates_) {
// TODO(simpkins): If gen_templates_ is enabled, we currently assume all
// parent services were also generated with templates enabled.
extends_ += "T<Protocol_>";
}
}
}
void ProcessorGenerator::generate_class_definition() {
// Generate the dispatch methods
vector<t_function*> functions = service_->get_functions();
vector<t_function*>::iterator f_iter;
string parent_class;
if (service_->get_extends() != nullptr) {
parent_class = extends_;
} else {
if (style_ == "Cob") {
parent_class = "::apache::thrift::async::TAsyncDispatchProcessor";
} else {
parent_class = "::apache::thrift::TDispatchProcessor";
}
if (generator_->gen_templates_) {
parent_class += "T<Protocol_>";
}
}
// Generate the header portion
f_header_ << template_header_ << "class " << class_name_ << " : public " << parent_class << " {"
<< '\n';
// Protected data members
f_header_ << " protected:" << '\n';
indent_up();
f_header_ << indent() << "::std::shared_ptr<" << if_name_ << "> iface_;" << '\n';
f_header_ << indent() << "virtual " << ret_type_ << "dispatchCall(" << finish_cob_
<< "::apache::thrift::protocol::TProtocol* iprot, "
<< "::apache::thrift::protocol::TProtocol* oprot, "
<< "const std::string& fname, int32_t seqid" << call_context_
<< ") override;" << '\n';
if (generator_->gen_templates_) {
f_header_ << indent() << "virtual " << ret_type_ << "dispatchCallTemplated(" << finish_cob_
<< "Protocol_* iprot, Protocol_* oprot, "
<< "const std::string& fname, int32_t seqid" << call_context_ << ");" << '\n';
}
indent_down();
// Process function declarations
f_header_ << " private:" << '\n';
indent_up();
// Declare processMap_
f_header_ << indent() << "typedef void (" << class_name_ << "::*"
<< "ProcessFunction)(" << finish_cob_decl_ << "int32_t, "
<< "::apache::thrift::protocol::TProtocol*, "
<< "::apache::thrift::protocol::TProtocol*" << call_context_decl_ << ");" << '\n';
if (generator_->gen_templates_) {
f_header_ << indent() << "typedef void (" << class_name_ << "::*"
<< "SpecializedProcessFunction)(" << finish_cob_decl_ << "int32_t, "
<< "Protocol_*, Protocol_*" << call_context_decl_ << ");" << '\n' << indent()
<< "struct ProcessFunctions {" << '\n' << indent() << " ProcessFunction generic;"
<< '\n' << indent() << " SpecializedProcessFunction specialized;" << '\n' << indent()
<< " ProcessFunctions(ProcessFunction g, "
<< "SpecializedProcessFunction s) :" << '\n' << indent() << " generic(g)," << '\n'
<< indent() << " specialized(s) {}" << '\n' << indent()
<< " ProcessFunctions() : generic(nullptr), specialized(nullptr) "
<< "{}" << '\n' << indent() << "};" << '\n' << indent()
<< "typedef std::map<std::string, ProcessFunctions> "
<< "ProcessMap;" << '\n';
} else {
f_header_ << indent() << "typedef std::map<std::string, ProcessFunction> "
<< "ProcessMap;" << '\n';
}
f_header_ << indent() << "ProcessMap processMap_;" << '\n';
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
indent(f_header_) << "void process_" << (*f_iter)->get_name() << "(" << finish_cob_
<< "int32_t seqid, ::apache::thrift::protocol::TProtocol* iprot, "
"::apache::thrift::protocol::TProtocol* oprot" << call_context_ << ");"
<< '\n';
if (generator_->gen_templates_) {
indent(f_header_) << "void process_" << (*f_iter)->get_name() << "(" << finish_cob_
<< "int32_t seqid, Protocol_* iprot, Protocol_* oprot" << call_context_
<< ");" << '\n';
}
if (style_ == "Cob") {
// XXX Factor this out, even if it is a pain.
string ret_arg = ((*f_iter)->get_returntype()->is_void()
? ""
: ", const " + type_name((*f_iter)->get_returntype()) + "& _return");
f_header_ << indent() << "void return_" << (*f_iter)->get_name()
<< "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< "::apache::thrift::protocol::TProtocol* oprot, "
<< "void* ctx" << ret_arg << ");" << '\n';
if (generator_->gen_templates_) {
f_header_ << indent() << "void return_" << (*f_iter)->get_name()
<< "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< "Protocol_* oprot, void* ctx" << ret_arg << ");" << '\n';
}
// XXX Don't declare throw if it doesn't exist
f_header_ << indent() << "void throw_" << (*f_iter)->get_name()
<< "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< "::apache::thrift::protocol::TProtocol* oprot, void* ctx, "
<< "::apache::thrift::TDelayedException* _throw);" << '\n';
if (generator_->gen_templates_) {
f_header_ << indent() << "void throw_" << (*f_iter)->get_name()
<< "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< "Protocol_* oprot, void* ctx, "
<< "::apache::thrift::TDelayedException* _throw);" << '\n';
}
}
}
f_header_ << " public:" << '\n' << indent() << class_name_ << "(::std::shared_ptr<" << if_name_
<< "> iface) :" << '\n';
if (!extends_.empty()) {
f_header_ << indent() << " " << extends_ << "(iface)," << '\n';
}
f_header_ << indent() << " iface_(iface) {" << '\n';
indent_up();
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
f_header_ << indent() << "processMap_[\"" << (*f_iter)->get_name() << "\"] = ";
if (generator_->gen_templates_) {
f_header_ << "ProcessFunctions(" << '\n';
if (generator_->gen_templates_only_) {
indent(f_header_) << " nullptr," << '\n';
} else {
indent(f_header_) << " &" << class_name_ << "::process_" << (*f_iter)->get_name() << ","
<< '\n';
}
indent(f_header_) << " &" << class_name_ << "::process_" << (*f_iter)->get_name() << ")";
} else {
f_header_ << "&" << class_name_ << "::process_" << (*f_iter)->get_name();
}
f_header_ << ";" << '\n';
}
indent_down();
f_header_ << indent() << "}" << '\n' << '\n' << indent() << "virtual ~" << class_name_ << "() {}"
<< '\n';
indent_down();
f_header_ << "};" << '\n' << '\n';
if (generator_->gen_templates_) {
// Generate a backwards compatible typedef, for callers who don't know
// about the new template-style code.
//
// We can't use TProtocol as the template parameter, since ProcessorT
// provides overloaded versions of most methods, one of which accepts
// TProtocol pointers, and one which accepts Protocol_ pointers. This
// results in a compile error if instantiated with Protocol_ == TProtocol.
// Therefore, we define TDummyProtocol solely so we can use it as the
// template parameter here.
f_header_ << "typedef " << class_name_ << "< ::apache::thrift::protocol::TDummyProtocol > "
<< service_name_ << pstyle_ << "Processor;" << '\n' << '\n';
}
}
void ProcessorGenerator::generate_dispatch_call(bool template_protocol) {
string protocol = "::apache::thrift::protocol::TProtocol";
string function_suffix;
if (template_protocol) {
protocol = "Protocol_";
// We call the generic version dispatchCall(), and the specialized
// version dispatchCallTemplated(). We can't call them both
// dispatchCall(), since this will cause the compiler to issue a warning if
// a service that doesn't use templates inherits from a service that does
// use templates: the compiler complains that the subclass only implements
// the generic version of dispatchCall(), and hides the templated version.
// Using different names for the two functions prevents this.
function_suffix = "Templated";
}
f_out_ << template_header_ << ret_type_ << class_name_ << template_suffix_ << "::dispatchCall"
<< function_suffix << "(" << finish_cob_ << protocol << "* iprot, " << protocol
<< "* oprot, "
<< "const std::string& fname, int32_t seqid" << call_context_ << ") {" << '\n';
indent_up();
// HOT: member function pointer map
f_out_ << indent() << typename_str_ << "ProcessMap::iterator pfn;" << '\n' << indent()
<< "pfn = processMap_.find(fname);" << '\n' << indent()
<< "if (pfn == processMap_.end()) {" << '\n';
if (extends_.empty()) {
f_out_ << indent() << " iprot->skip(::apache::thrift::protocol::T_STRUCT);" << '\n' << indent()
<< " iprot->readMessageEnd();" << '\n' << indent()
<< " iprot->getTransport()->readEnd();" << '\n' << indent()
<< " ::apache::thrift::TApplicationException "
"x(::apache::thrift::TApplicationException::UNKNOWN_METHOD, \"Invalid method name: "
"'\"+fname+\"'\");" << '\n' << indent()
<< " oprot->writeMessageBegin(fname, ::apache::thrift::protocol::T_EXCEPTION, seqid);"
<< '\n' << indent() << " x.write(oprot);" << '\n' << indent()
<< " oprot->writeMessageEnd();" << '\n' << indent()
<< " oprot->getTransport()->writeEnd();" << '\n' << indent()
<< " oprot->getTransport()->flush();" << '\n' << indent()
<< (style_ == "Cob" ? " return cob(true);" : " return true;") << '\n';
} else {
f_out_ << indent() << " return " << extends_ << "::dispatchCall("
<< (style_ == "Cob" ? "cob, " : "") << "iprot, oprot, fname, seqid" << call_context_arg_
<< ");" << '\n';
}
f_out_ << indent() << "}" << '\n';
if (template_protocol) {
f_out_ << indent() << "(this->*(pfn->second.specialized))";
} else {
if (generator_->gen_templates_only_) {
// TODO: This is a null pointer, so nothing good will come from calling
// it. Throw an exception instead.
f_out_ << indent() << "(this->*(pfn->second.generic))";
} else if (generator_->gen_templates_) {
f_out_ << indent() << "(this->*(pfn->second.generic))";
} else {
f_out_ << indent() << "(this->*(pfn->second))";
}
}
f_out_ << "(" << cob_arg_ << "seqid, iprot, oprot" << call_context_arg_ << ");" << '\n';
// TODO(dreiss): return pfn ret?
if (style_ == "Cob") {
f_out_ << indent() << "return;" << '\n';
} else {
f_out_ << indent() << "return true;" << '\n';
}
indent_down();
f_out_ << "}" << '\n' << '\n';
}
void ProcessorGenerator::generate_process_functions() {
vector<t_function*> functions = service_->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
if (generator_->gen_templates_) {
generator_->generate_process_function(service_, *f_iter, style_, false);
generator_->generate_process_function(service_, *f_iter, style_, true);
} else {
generator_->generate_process_function(service_, *f_iter, style_, false);
}
}
}
void ProcessorGenerator::generate_factory() {
string if_factory_name = if_name_ + "Factory";
// Generate the factory class definition
f_header_ << template_header_ << "class " << factory_class_name_ << " : public ::apache::thrift::"
<< (style_ == "Cob" ? "async::TAsyncProcessorFactory" : "TProcessorFactory") << " {"
<< '\n' << " public:" << '\n';
indent_up();
f_header_ << indent() << factory_class_name_ << "(const ::std::shared_ptr< " << if_factory_name
<< " >& handlerFactory) noexcept :" << '\n' << indent()
<< " handlerFactory_(handlerFactory) {}" << '\n' << '\n' << indent()
<< "::std::shared_ptr< ::apache::thrift::"
<< (style_ == "Cob" ? "async::TAsyncProcessor" : "TProcessor") << " > "
<< "getProcessor(const ::apache::thrift::TConnectionInfo& connInfo) override;"
<< '\n';
f_header_ << '\n' << " protected:" << '\n' << indent() << "::std::shared_ptr< "
<< if_factory_name << " > handlerFactory_;" << '\n';
indent_down();
f_header_ << "};" << '\n' << '\n';
// If we are generating templates, output a typedef for the plain
// factory name.
if (generator_->gen_templates_) {
f_header_ << "typedef " << factory_class_name_
<< "< ::apache::thrift::protocol::TDummyProtocol > " << service_name_ << pstyle_
<< "ProcessorFactory;" << '\n' << '\n';
}
// Generate the getProcessor() method
f_out_ << template_header_ << indent() << "::std::shared_ptr< ::apache::thrift::"
<< (style_ == "Cob" ? "async::TAsyncProcessor" : "TProcessor") << " > "
<< factory_class_name_ << template_suffix_ << "::getProcessor("
<< "const ::apache::thrift::TConnectionInfo& connInfo) {" << '\n';
indent_up();
f_out_ << indent() << "::apache::thrift::ReleaseHandler< " << if_factory_name
<< " > cleanup(handlerFactory_);" << '\n' << indent() << "::std::shared_ptr< "
<< if_name_ << " > handler("
<< "handlerFactory_->getHandler(connInfo), cleanup);" << '\n' << indent()
<< "::std::shared_ptr< ::apache::thrift::"
<< (style_ == "Cob" ? "async::TAsyncProcessor" : "TProcessor") << " > "
<< "processor(new " << class_name_ << template_suffix_ << "(handler));" << '\n' << indent()
<< "return processor;" << '\n';
indent_down();
f_out_ << indent() << "}" << '\n' << '\n';
}
/**
* Generates a service processor definition.
*
* @param tservice The service to generate a processor for.
*/
void t_cpp_generator::generate_service_processor(t_service* tservice, string style) {
ProcessorGenerator generator(this, tservice, style);
generator.run();
}
/**
* Generates a struct and helpers for a function.
*
* @param tfunction The function
*/
void t_cpp_generator::generate_function_helpers(t_service* tservice, t_function* tfunction) {
if (tfunction->is_oneway()) {
return;
}
std::ostream& out = (gen_templates_ ? f_service_tcc_ : f_service_);
t_struct result(program_, tservice->get_name() + "_" + tfunction->get_name() + "_result");
t_field success(tfunction->get_returntype(), "success", 0);
if (!tfunction->get_returntype()->is_void()) {
result.append(&success);
}
t_struct* xs = tfunction->get_xceptions();
const vector<t_field*>& fields = xs->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
result.append(*f_iter);
}
generate_struct_declaration(f_header_, &result, false);
generate_struct_definition(out, f_service_, &result, false);
generate_struct_reader(out, &result);
generate_struct_result_writer(out, &result);
result.set_name(tservice->get_name() + "_" + tfunction->get_name() + "_presult");
generate_struct_declaration(f_header_, &result, false, true, true, gen_cob_style_);
generate_struct_definition(out, f_service_, &result, false, false, true);
generate_struct_reader(out, &result, true);
if (gen_cob_style_) {
generate_struct_writer(out, &result, true);
}
}
/**
* Generates a process function definition.
*
* @param tfunction The function to write a dispatcher for
*/
void t_cpp_generator::generate_process_function(t_service* tservice,
t_function* tfunction,
string style,
bool specialized) {
t_struct* arg_struct = tfunction->get_arglist();
const std::vector<t_field*>& fields = arg_struct->get_members();
vector<t_field*>::const_iterator f_iter;
t_struct* xs = tfunction->get_xceptions();
const std::vector<t_field*>& xceptions = xs->get_members();
vector<t_field*>::const_iterator x_iter;
string service_func_name = "\"" + tservice->get_name() + "." + tfunction->get_name() + "\"";
std::ostream& out = (gen_templates_ ? f_service_tcc_ : f_service_);
string prot_type = (specialized ? "Protocol_" : "::apache::thrift::protocol::TProtocol");
string class_suffix;
if (gen_templates_) {
class_suffix = "T<Protocol_>";
}
// I tried to do this as one function. I really did. But it was too hard.
if (style != "Cob") {
// Open function
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n';
}
const bool unnamed_oprot_seqid = tfunction->is_oneway() && !(gen_templates_ && !specialized);
out << "void " << tservice->get_name() << "Processor" << class_suffix << "::"
<< "process_" << tfunction->get_name() << "("
<< "int32_t" << (unnamed_oprot_seqid ? ", " : " seqid, ") << prot_type << "* iprot, "
<< prot_type << "*" << (unnamed_oprot_seqid ? ", " : " oprot, ") << "void* callContext)"
<< '\n';
scope_up(out);
string argsname = tservice->get_name() + "_" + tfunction->get_name() + "_args";
string resultname = tservice->get_name() + "_" + tfunction->get_name() + "_result";
if (tfunction->is_oneway() && !unnamed_oprot_seqid) {
out << indent() << "(void) seqid;" << '\n' << indent() << "(void) oprot;" << '\n';
}
out << indent() << "void* ctx = nullptr;" << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " ctx = this->eventHandler_->getContext(" << service_func_name << ", callContext);"
<< '\n' << indent() << "}" << '\n' << indent()
<< "::apache::thrift::TProcessorContextFreer freer("
<< "this->eventHandler_.get(), ctx, " << service_func_name << ");" << '\n' << '\n'
<< indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->preRead(ctx, " << service_func_name << ");" << '\n' << indent()
<< "}" << '\n' << '\n' << indent() << argsname << " args;" << '\n' << indent()
<< "args.read(iprot);" << '\n' << indent() << "iprot->readMessageEnd();" << '\n' << indent()
<< "uint32_t bytes = iprot->getTransport()->readEnd();" << '\n' << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->postRead(ctx, " << service_func_name << ", bytes);" << '\n'
<< indent() << "}" << '\n' << '\n';
// Declare result
if (!tfunction->is_oneway()) {
out << indent() << resultname << " result;" << '\n';
}
// Try block for functions with exceptions
out << indent() << "try {" << '\n';
indent_up();
// Generate the function call
bool first = true;
out << indent();
if (!tfunction->is_oneway() && !tfunction->get_returntype()->is_void()) {
if (is_complex_type(tfunction->get_returntype())) {
first = false;
out << "iface_->" << tfunction->get_name() << "(result.success";
} else {
out << "result.success = iface_->" << tfunction->get_name() << "(";
}
} else {
out << "iface_->" << tfunction->get_name() << "(";
}
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
} else {
out << ", ";
}
out << "args." << (*f_iter)->get_name();
}
out << ");" << '\n';
// Set isset on success field
if (!tfunction->is_oneway() && !tfunction->get_returntype()->is_void()) {
out << indent() << "result.__isset.success = true;" << '\n';
}
indent_down();
out << indent() << "}";
if (!tfunction->is_oneway()) {
for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
out << " catch (" << type_name((*x_iter)->get_type()) << " &" << (*x_iter)->get_name()
<< ") {" << '\n';
if (!tfunction->is_oneway()) {
indent_up();
out << indent() << "result." << (*x_iter)->get_name()
<< " = std::move(" << (*x_iter)->get_name() << ");" << '\n'
<< indent() << "result.__isset." << (*x_iter)->get_name() << " = true;" << '\n';
indent_down();
out << indent() << "}";
} else {
out << "}";
}
}
}
if (!tfunction->is_oneway()) {
out << " catch (const std::exception& e) {" << '\n';
} else {
out << " catch (const std::exception&) {" << '\n';
}
indent_up();
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->handlerError(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n';
if (!tfunction->is_oneway()) {
out << '\n' << indent() << "::apache::thrift::TApplicationException x(e.what());" << '\n'
<< indent() << "oprot->writeMessageBegin(\"" << tfunction->get_name()
<< "\", ::apache::thrift::protocol::T_EXCEPTION, seqid);" << '\n' << indent()
<< "x.write(oprot);" << '\n' << indent() << "oprot->writeMessageEnd();" << '\n'
<< indent() << "oprot->getTransport()->writeEnd();" << '\n' << indent()
<< "oprot->getTransport()->flush();" << '\n';
}
out << indent() << "return;" << '\n';
indent_down();
out << indent() << "}" << '\n' << '\n';
// Shortcut out here for oneway functions
if (tfunction->is_oneway()) {
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->asyncComplete(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n' << '\n' << indent() << "return;" << '\n';
indent_down();
out << "}" << '\n' << '\n';
return;
}
// Serialize the result into a struct
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->preWrite(ctx, " << service_func_name << ");" << '\n' << indent()
<< "}" << '\n' << '\n' << indent() << "oprot->writeMessageBegin(\"" << tfunction->get_name()
<< "\", ::apache::thrift::protocol::T_REPLY, seqid);" << '\n' << indent()
<< "result.write(oprot);" << '\n' << indent() << "oprot->writeMessageEnd();" << '\n'
<< indent() << "bytes = oprot->getTransport()->writeEnd();" << '\n' << indent()
<< "oprot->getTransport()->flush();" << '\n' << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->postWrite(ctx, " << service_func_name << ", bytes);" << '\n'
<< indent() << "}" << '\n';
// Close function
scope_down(out);
out << '\n';
}
// Cob style.
else {
// Processor entry point.
// TODO(edhall) update for callContext when TEventServer is ready
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n';
}
out << "void " << tservice->get_name() << "AsyncProcessor" << class_suffix << "::process_"
<< tfunction->get_name() << "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< prot_type << "* iprot, " << prot_type << "* oprot)" << '\n';
scope_up(out);
// TODO(simpkins): we could try to consoldate this
// with the non-cob code above
if (gen_templates_ && !specialized) {
// If these are instances of Protocol_, instead of any old TProtocol,
// use the specialized process function instead.
out << indent() << "Protocol_* _iprot = dynamic_cast<Protocol_*>(iprot);" << '\n' << indent()
<< "Protocol_* _oprot = dynamic_cast<Protocol_*>(oprot);" << '\n' << indent()
<< "if (_iprot && _oprot) {" << '\n' << indent() << " return process_"
<< tfunction->get_name() << "(cob, seqid, _iprot, _oprot);" << '\n' << indent() << "}"
<< '\n' << indent() << "T_GENERIC_PROTOCOL(this, iprot, _iprot);" << '\n' << indent()
<< "T_GENERIC_PROTOCOL(this, oprot, _oprot);" << '\n' << '\n';
}
if (tfunction->is_oneway()) {
out << indent() << "(void) seqid;" << '\n' << indent() << "(void) oprot;" << '\n';
}
out << indent() << tservice->get_name() + "_" + tfunction->get_name() << "_args args;" << '\n'
<< indent() << "void* ctx = nullptr;" << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " ctx = this->eventHandler_->getContext(" << service_func_name << ", nullptr);" << '\n'
<< indent() << "}" << '\n' << indent() << "::apache::thrift::TProcessorContextFreer freer("
<< "this->eventHandler_.get(), ctx, " << service_func_name << ");" << '\n' << '\n'
<< indent() << "try {" << '\n';
indent_up();
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->preRead(ctx, " << service_func_name << ");" << '\n' << indent()
<< "}" << '\n' << indent() << "args.read(iprot);" << '\n' << indent()
<< "iprot->readMessageEnd();" << '\n' << indent()
<< "uint32_t bytes = iprot->getTransport()->readEnd();" << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->postRead(ctx, " << service_func_name << ", bytes);" << '\n'
<< indent() << "}" << '\n';
scope_down(out);
// TODO(dreiss): Handle TExceptions? Expose to server?
out << indent() << "catch (const std::exception&) {" << '\n' << indent()
<< " if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->handlerError(ctx, " << service_func_name << ");" << '\n'
<< indent() << " }" << '\n' << indent() << " return cob(false);" << '\n' << indent()
<< "}" << '\n';
if (tfunction->is_oneway()) {
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->asyncComplete(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n';
}
// TODO(dreiss): Figure out a strategy for exceptions in async handlers.
out << indent() << "freer.unregister();" << '\n';
if (tfunction->is_oneway()) {
// No return. Just hand off our cob.
// TODO(dreiss): Call the cob immediately?
out << indent() << "iface_->" << tfunction->get_name() << "("
<< "::std::bind(cob, true)" << '\n';
indent_up();
indent_up();
} else {
string ret_arg, ret_placeholder;
if (!tfunction->get_returntype()->is_void()) {
ret_arg = ", const " + type_name(tfunction->get_returntype()) + "& _return";
ret_placeholder = ", ::std::placeholders::_1";
}
// When gen_templates_ is true, the return_ and throw_ functions are
// overloaded. We have to declare pointers to them so that the compiler
// can resolve the correct overloaded version.
out << indent() << "void (" << tservice->get_name() << "AsyncProcessor" << class_suffix
<< "::*return_fn)(::std::function<void(bool ok)> "
<< "cob, int32_t seqid, " << prot_type << "* oprot, void* ctx" << ret_arg
<< ") =" << '\n';
out << indent() << " &" << tservice->get_name() << "AsyncProcessor" << class_suffix
<< "::return_" << tfunction->get_name() << ";" << '\n';
if (!xceptions.empty()) {
out << indent() << "void (" << tservice->get_name() << "AsyncProcessor" << class_suffix
<< "::*throw_fn)(::std::function<void(bool ok)> "
<< "cob, int32_t seqid, " << prot_type << "* oprot, void* ctx, "
<< "::apache::thrift::TDelayedException* _throw) =" << '\n';
out << indent() << " &" << tservice->get_name() << "AsyncProcessor" << class_suffix
<< "::throw_" << tfunction->get_name() << ";" << '\n';
}
out << indent() << "iface_->" << tfunction->get_name() << "(" << '\n';
indent_up();
indent_up();
out << indent() << "::std::bind(return_fn, this, cob, seqid, oprot, ctx" << ret_placeholder
<< ")";
if (!xceptions.empty()) {
out << ',' << '\n' << indent() << "::std::bind(throw_fn, this, cob, seqid, oprot, "
<< "ctx, ::std::placeholders::_1)";
}
}
// XXX Whitespace cleanup.
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
out << ',' << '\n' << indent() << "args." << (*f_iter)->get_name();
}
out << ");" << '\n';
indent_down();
indent_down();
scope_down(out);
out << '\n';
// Normal return.
if (!tfunction->is_oneway()) {
string ret_arg_decl, ret_arg_name;
if (!tfunction->get_returntype()->is_void()) {
ret_arg_decl = ", const " + type_name(tfunction->get_returntype()) + "& _return";
ret_arg_name = ", _return";
}
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n';
}
out << "void " << tservice->get_name() << "AsyncProcessor" << class_suffix << "::return_"
<< tfunction->get_name() << "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< prot_type << "* oprot, void* ctx" << ret_arg_decl << ')' << '\n';
scope_up(out);
if (gen_templates_ && !specialized) {
// If oprot is a Protocol_ instance,
// use the specialized return function instead.
out << indent() << "Protocol_* _oprot = dynamic_cast<Protocol_*>(oprot);" << '\n'
<< indent() << "if (_oprot) {" << '\n' << indent() << " return return_"
<< tfunction->get_name() << "(cob, seqid, _oprot, ctx" << ret_arg_name << ");" << '\n'
<< indent() << "}" << '\n' << indent() << "T_GENERIC_PROTOCOL(this, oprot, _oprot);"
<< '\n' << '\n';
}
out << indent() << tservice->get_name() << "_" << tfunction->get_name() << "_presult result;"
<< '\n';
if (!tfunction->get_returntype()->is_void()) {
// The const_cast here is unfortunate, but it would be a pain to avoid,
// and we only do a write with this struct, which is const-safe.
out << indent() << "result.success = const_cast<" << type_name(tfunction->get_returntype())
<< "*>(&_return);" << '\n' << indent() << "result.__isset.success = true;" << '\n';
}
// Serialize the result into a struct
out << '\n' << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " ctx = this->eventHandler_->getContext(" << service_func_name << ", nullptr);" << '\n'
<< indent() << "}" << '\n' << indent()
<< "::apache::thrift::TProcessorContextFreer freer("
<< "this->eventHandler_.get(), ctx, " << service_func_name << ");" << '\n' << '\n'
<< indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->preWrite(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n' << '\n' << indent() << "oprot->writeMessageBegin(\""
<< tfunction->get_name() << "\", ::apache::thrift::protocol::T_REPLY, seqid);" << '\n'
<< indent() << "result.write(oprot);" << '\n' << indent() << "oprot->writeMessageEnd();"
<< '\n' << indent() << "uint32_t bytes = oprot->getTransport()->writeEnd();" << '\n'
<< indent() << "oprot->getTransport()->flush();" << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->postWrite(ctx, " << service_func_name << ", bytes);" << '\n'
<< indent() << "}" << '\n' << indent() << "return cob(true);" << '\n';
scope_down(out);
out << '\n';
}
// Exception return.
if (!tfunction->is_oneway() && !xceptions.empty()) {
if (gen_templates_) {
out << indent() << "template <class Protocol_>" << '\n';
}
out << "void " << tservice->get_name() << "AsyncProcessor" << class_suffix << "::throw_"
<< tfunction->get_name() << "(::std::function<void(bool ok)> cob, int32_t seqid, "
<< prot_type << "* oprot, void* ctx, "
<< "::apache::thrift::TDelayedException* _throw)" << '\n';
scope_up(out);
if (gen_templates_ && !specialized) {
// If oprot is a Protocol_ instance,
// use the specialized throw function instead.
out << indent() << "Protocol_* _oprot = dynamic_cast<Protocol_*>(oprot);" << '\n'
<< indent() << "if (_oprot) {" << '\n' << indent() << " return throw_"
<< tfunction->get_name() << "(cob, seqid, _oprot, ctx, _throw);" << '\n' << indent()
<< "}" << '\n' << indent() << "T_GENERIC_PROTOCOL(this, oprot, _oprot);" << '\n'
<< '\n';
}
// Get the event handler context
out << '\n' << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " ctx = this->eventHandler_->getContext(" << service_func_name << ", nullptr);" << '\n'
<< indent() << "}" << '\n' << indent()
<< "::apache::thrift::TProcessorContextFreer freer("
<< "this->eventHandler_.get(), ctx, " << service_func_name << ");" << '\n' << '\n';
// Throw the TDelayedException, and catch the result
out << indent() << tservice->get_name() << "_" << tfunction->get_name() << "_result result;"
<< '\n' << '\n' << indent() << "try {" << '\n';
indent_up();
out << indent() << "_throw->throw_it();" << '\n' << indent() << "return cob(false);"
<< '\n'; // Is this possible? TBD.
indent_down();
out << indent() << '}';
for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
out << " catch (" << type_name((*x_iter)->get_type()) << " &" << (*x_iter)->get_name()
<< ") {" << '\n';
indent_up();
out << indent() << "result." << (*x_iter)->get_name() << " = " << (*x_iter)->get_name()
<< ";" << '\n' << indent() << "result.__isset." << (*x_iter)->get_name() << " = true;"
<< '\n';
scope_down(out);
}
// Handle the case where an undeclared exception is thrown
out << " catch (std::exception& e) {" << '\n';
indent_up();
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->handlerError(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n' << '\n' << indent()
<< "::apache::thrift::TApplicationException x(e.what());" << '\n' << indent()
<< "oprot->writeMessageBegin(\"" << tfunction->get_name()
<< "\", ::apache::thrift::protocol::T_EXCEPTION, seqid);" << '\n' << indent()
<< "x.write(oprot);" << '\n' << indent() << "oprot->writeMessageEnd();" << '\n'
<< indent() << "oprot->getTransport()->writeEnd();" << '\n' << indent()
<< "oprot->getTransport()->flush();" << '\n' <<
// We pass true to the cob here, since we did successfully write a
// response, even though it is an exception response.
// It looks like the argument is currently ignored, anyway.
indent() << "return cob(true);" << '\n';
scope_down(out);
// Serialize the result into a struct
out << indent() << "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->preWrite(ctx, " << service_func_name << ");" << '\n'
<< indent() << "}" << '\n' << '\n' << indent() << "oprot->writeMessageBegin(\""
<< tfunction->get_name() << "\", ::apache::thrift::protocol::T_REPLY, seqid);" << '\n'
<< indent() << "result.write(oprot);" << '\n' << indent() << "oprot->writeMessageEnd();"
<< '\n' << indent() << "uint32_t bytes = oprot->getTransport()->writeEnd();" << '\n'
<< indent() << "oprot->getTransport()->flush();" << '\n' << indent()
<< "if (this->eventHandler_.get() != nullptr) {" << '\n' << indent()
<< " this->eventHandler_->postWrite(ctx, " << service_func_name << ", bytes);" << '\n'
<< indent() << "}" << '\n' << indent() << "return cob(true);" << '\n';
scope_down(out);
out << '\n';
} // for each function
} // cob style
}
/**
* Generates a skeleton file of a server
*
* @param tservice The service to generate a server for.
*/
void t_cpp_generator::generate_service_skeleton(t_service* tservice) {
string svcname = tservice->get_name();
// Service implementation file includes
string f_skeleton_name = get_out_dir() + svcname + "_server.skeleton.cpp";
string ns = namespace_prefix(tservice->get_program()->get_namespace("cpp"));
ofstream_with_content_based_conditional_update f_skeleton;
f_skeleton.open(f_skeleton_name.c_str());
f_skeleton << "// This autogenerated skeleton file illustrates how to build a server." << '\n'
<< "// You should copy it to another filename to avoid overwriting it." << '\n' << '\n'
<< "#include \"" << get_include_prefix(*get_program()) << svcname << ".h\"" << '\n'
<< "#include <thrift/protocol/TBinaryProtocol.h>" << '\n'
<< "#include <thrift/server/TSimpleServer.h>" << '\n'
<< "#include <thrift/transport/TServerSocket.h>" << '\n'
<< "#include <thrift/transport/TBufferTransports.h>" << '\n' << '\n'
<< "using namespace ::apache::thrift;" << '\n'
<< "using namespace ::apache::thrift::protocol;" << '\n'
<< "using namespace ::apache::thrift::transport;" << '\n'
<< "using namespace ::apache::thrift::server;" << '\n' << '\n';
// the following code would not compile:
// using namespace ;
// using namespace ::;
if ((!ns.empty()) && (ns.compare(" ::") != 0)) {
f_skeleton << "using namespace " << string(ns, 0, ns.size() - 2) << ";" << '\n' << '\n';
}
f_skeleton << "class " << svcname << "Handler : virtual public " << svcname << "If {" << '\n'
<< " public:" << '\n';
indent_up();
f_skeleton << indent() << svcname << "Handler() {" << '\n' << indent()
<< " // Your initialization goes here" << '\n' << indent() << "}" << '\n' << '\n';
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
generate_java_doc(f_skeleton, *f_iter);
f_skeleton << indent() << function_signature(*f_iter, "") << " {" << '\n' << indent()
<< " // Your implementation goes here" << '\n' << indent() << " printf(\""
<< (*f_iter)->get_name() << "\\n\");" << '\n' << indent() << "}" << '\n' << '\n';
}
indent_down();
f_skeleton << "};" << '\n' << '\n';
f_skeleton << indent() << "int main(int argc, char **argv) {" << '\n';
indent_up();
f_skeleton
<< indent() << "int port = 9090;" << '\n' << indent() << "::std::shared_ptr<" << svcname
<< "Handler> handler(new " << svcname << "Handler());" << '\n' << indent()
<< "::std::shared_ptr<TProcessor> processor(new " << svcname << "Processor(handler));" << '\n'
<< indent() << "::std::shared_ptr<TServerTransport> serverTransport(new TServerSocket(port));"
<< '\n' << indent()
<< "::std::shared_ptr<TTransportFactory> transportFactory(new TBufferedTransportFactory());" << '\n'
<< indent() << "::std::shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());"
<< '\n' << '\n' << indent()
<< "TSimpleServer server(processor, serverTransport, transportFactory, protocolFactory);"
<< '\n' << indent() << "server.serve();" << '\n' << indent() << "return 0;" << '\n';
indent_down();
f_skeleton << "}" << '\n' << '\n';
// Close the files
f_skeleton.close();
}
/**
* Deserializes a field of any type.
*/
void t_cpp_generator::generate_deserialize_field(ostream& out,
t_field* tfield,
string prefix,
string suffix) {
t_type* type = get_true_type(tfield->get_type());
if (type->is_void()) {
throw "CANNOT GENERATE DESERIALIZE CODE FOR void TYPE: " + prefix + tfield->get_name();
}
string name = prefix + tfield->get_name() + suffix;
if (type->is_struct() || type->is_xception()) {
generate_deserialize_struct(out, (t_struct*)type, name, is_reference(tfield));
} else if (type->is_container()) {
generate_deserialize_container(out, type, name);
} else if (type->is_base_type()) {
indent(out) << "xfer += iprot->";
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "compiler error: cannot serialize void field in a struct: " + name;
break;
case t_base_type::TYPE_UUID:
out << "readUUID(" << name << ");";
break;
case t_base_type::TYPE_STRING:
if (type->is_binary()) {
out << "readBinary(" << name << ");";
} else {
out << "readString(" << name << ");";
}
break;
case t_base_type::TYPE_BOOL:
out << "readBool(" << name << ");";
break;
case t_base_type::TYPE_I8:
out << "readByte(" << name << ");";
break;
case t_base_type::TYPE_I16:
out << "readI16(" << name << ");";
break;
case t_base_type::TYPE_I32:
out << "readI32(" << name << ");";
break;
case t_base_type::TYPE_I64:
out << "readI64(" << name << ");";
break;
case t_base_type::TYPE_DOUBLE:
out << "readDouble(" << name << ");";
break;
default:
throw "compiler error: no C++ reader for base type " + t_base_type::t_base_name(tbase) + " " + name;
}
out << '\n';
} else if (type->is_enum()) {
string t = tmp("ecast");
out << indent() << "int32_t " << t << ";" << '\n' << indent() << "xfer += iprot->readI32(" << t
<< ");" << '\n' << indent() << name << " = static_cast<"
<< type_name(type) << ">(" << t << ");" << '\n';
} else {
printf("DO NOT KNOW HOW TO DESERIALIZE FIELD '%s' TYPE '%s'\n",
tfield->get_name().c_str(),
type_name(type).c_str());
}
}
/**
* Generates an unserializer for a variable. This makes two key assumptions,
* first that there is a const char* variable named data that points to the
* buffer for deserialization, and that there is a variable protocol which
* is a reference to a TProtocol serialization object.
*/
void t_cpp_generator::generate_deserialize_struct(ostream& out,
t_struct* tstruct,
string prefix,
bool pointer) {
if (pointer) {
indent(out) << "if (!" << prefix << ") { " << '\n';
indent(out) << " " << prefix << " = ::std::shared_ptr<" << type_name(tstruct) << ">(new "
<< type_name(tstruct) << ");" << '\n';
indent(out) << "}" << '\n';
indent(out) << "xfer += " << prefix << "->read(iprot);" << '\n';
indent(out) << "bool wasSet = false;" << '\n';
const vector<t_field*>& members = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = members.begin(); f_iter != members.end(); ++f_iter) {
indent(out) << "if (" << prefix << "->__isset." << (*f_iter)->get_name()
<< ") { wasSet = true; }" << '\n';
}
indent(out) << "if (!wasSet) { " << prefix << ".reset(); }" << '\n';
} else {
indent(out) << "xfer += " << prefix << ".read(iprot);" << '\n';
}
}
void t_cpp_generator::generate_deserialize_container(ostream& out, t_type* ttype, string prefix) {
scope_up(out);
string size = tmp("_size");
string ktype = tmp("_ktype");
string vtype = tmp("_vtype");
string etype = tmp("_etype");
t_container* tcontainer = (t_container*)ttype;
bool use_push = tcontainer->has_cpp_name();
indent(out) << prefix << ".clear();" << '\n' << indent() << "uint32_t " << size << ";" << '\n';
// Declare variables, read header
if (ttype->is_map()) {
out << indent() << "::apache::thrift::protocol::TType " << ktype << ";" << '\n' << indent()
<< "::apache::thrift::protocol::TType " << vtype << ";" << '\n' << indent()
<< "xfer += iprot->readMapBegin(" << ktype << ", " << vtype << ", " << size << ");" << '\n';
} else if (ttype->is_set()) {
out << indent() << "::apache::thrift::protocol::TType " << etype << ";" << '\n' << indent()
<< "xfer += iprot->readSetBegin(" << etype << ", " << size << ");" << '\n';
} else if (ttype->is_list()) {
out << indent() << "::apache::thrift::protocol::TType " << etype << ";" << '\n' << indent()
<< "xfer += iprot->readListBegin(" << etype << ", " << size << ");" << '\n';
if (!use_push) {
indent(out) << prefix << ".resize(" << size << ");" << '\n';
}
}
// For loop iterates over elements
string i = tmp("_i");
out << indent() << "uint32_t " << i << ";" << '\n' << indent() << "for (" << i << " = 0; " << i
<< " < " << size << "; ++" << i << ")" << '\n';
scope_up(out);
if (ttype->is_map()) {
generate_deserialize_map_element(out, (t_map*)ttype, prefix);
} else if (ttype->is_set()) {
generate_deserialize_set_element(out, (t_set*)ttype, prefix);
} else if (ttype->is_list()) {
generate_deserialize_list_element(out, (t_list*)ttype, prefix, use_push, i);
}
scope_down(out);
// Read container end
if (ttype->is_map()) {
indent(out) << "xfer += iprot->readMapEnd();" << '\n';
} else if (ttype->is_set()) {
indent(out) << "xfer += iprot->readSetEnd();" << '\n';
} else if (ttype->is_list()) {
indent(out) << "xfer += iprot->readListEnd();" << '\n';
}
scope_down(out);
}
/**
* Generates code to deserialize a map
*/
void t_cpp_generator::generate_deserialize_map_element(ostream& out, t_map* tmap, string prefix) {
string key = tmp("_key");
string val = tmp("_val");
t_field fkey(tmap->get_key_type(), key);
t_field fval(tmap->get_val_type(), val);
out << indent() << declare_field(&fkey) << '\n';
generate_deserialize_field(out, &fkey);
indent(out) << declare_field(&fval, false, false, false, true) << " = " << prefix << "[" << key
<< "];" << '\n';
generate_deserialize_field(out, &fval);
}
void t_cpp_generator::generate_deserialize_set_element(ostream& out, t_set* tset, string prefix) {
string elem = tmp("_elem");
t_field felem(tset->get_elem_type(), elem);
indent(out) << declare_field(&felem) << '\n';
generate_deserialize_field(out, &felem);
indent(out) << prefix << ".insert(" << elem << ");" << '\n';
}
void t_cpp_generator::generate_deserialize_list_element(ostream& out,
t_list* tlist,
string prefix,
bool use_push,
string index) {
if (use_push) {
string elem = tmp("_elem");
t_field felem(tlist->get_elem_type(), elem);
indent(out) << declare_field(&felem) << '\n';
generate_deserialize_field(out, &felem);
indent(out) << prefix << ".push_back(" << elem << ");" << '\n';
} else {
t_field felem(tlist->get_elem_type(), prefix + "[" + index + "]");
generate_deserialize_field(out, &felem);
}
}
/**
* Serializes a field of any type.
*
* @param tfield The field to serialize
* @param prefix Name to prepend to field name
*/
void t_cpp_generator::generate_serialize_field(ostream& out,
t_field* tfield,
string prefix,
string suffix) {
t_type* type = get_true_type(tfield->get_type());
string name = prefix + tfield->get_name() + suffix;
// Do nothing for void types
if (type->is_void()) {
throw "CANNOT GENERATE SERIALIZE CODE FOR void TYPE: " + name;
}
if (type->is_struct() || type->is_xception()) {
generate_serialize_struct(out, (t_struct*)type, name, is_reference(tfield));
} else if (type->is_container()) {
generate_serialize_container(out, type, name);
} else if (type->is_base_type() || type->is_enum()) {
indent(out) << "xfer += oprot->";
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "compiler error: cannot serialize void field in a struct: " + name;
break;
case t_base_type::TYPE_UUID:
out << "writeUUID(" << name << ");";
break;
case t_base_type::TYPE_STRING:
if (type->is_binary()) {
out << "writeBinary(" << name << ");";
} else {
out << "writeString(" << name << ");";
}
break;
case t_base_type::TYPE_BOOL:
out << "writeBool(" << name << ");";
break;
case t_base_type::TYPE_I8:
out << "writeByte(" << name << ");";
break;
case t_base_type::TYPE_I16:
out << "writeI16(" << name << ");";
break;
case t_base_type::TYPE_I32:
out << "writeI32(" << name << ");";
break;
case t_base_type::TYPE_I64:
out << "writeI64(" << name << ");";
break;
case t_base_type::TYPE_DOUBLE:
out << "writeDouble(" << name << ");";
break;
default:
throw "compiler error: no C++ writer for base type " + t_base_type::t_base_name(tbase)
+ " " + name;
}
} else if (type->is_enum()) {
out << "writeI32(static_cast<int32_t>(" << name << "));";
}
out << '\n';
} else {
printf("DO NOT KNOW HOW TO SERIALIZE FIELD '%s' TYPE '%s'\n",
name.c_str(),
type_name(type).c_str());
}
}
/**
* Serializes all the members of a struct.
*
* @param tstruct The struct to serialize
* @param prefix String prefix to attach to all fields
*/
void t_cpp_generator::generate_serialize_struct(ostream& out,
t_struct* tstruct,
string prefix,
bool pointer) {
if (pointer) {
indent(out) << "if (" << prefix << ") {" << '\n';
indent(out) << " xfer += " << prefix << "->write(oprot); " << '\n';
indent(out) << "} else {"
<< "oprot->writeStructBegin(\"" << tstruct->get_name() << "\"); " << '\n';
indent(out) << " oprot->writeStructEnd();" << '\n';
indent(out) << " oprot->writeFieldStop();" << '\n';
indent(out) << "}" << '\n';
} else {
indent(out) << "xfer += " << prefix << ".write(oprot);" << '\n';
}
}
void t_cpp_generator::generate_serialize_container(ostream& out, t_type* ttype, string prefix) {
scope_up(out);
if (ttype->is_map()) {
indent(out) << "xfer += oprot->writeMapBegin(" << type_to_enum(((t_map*)ttype)->get_key_type())
<< ", " << type_to_enum(((t_map*)ttype)->get_val_type()) << ", "
<< "static_cast<uint32_t>(" << prefix << ".size()));" << '\n';
} else if (ttype->is_set()) {
indent(out) << "xfer += oprot->writeSetBegin(" << type_to_enum(((t_set*)ttype)->get_elem_type())
<< ", "
<< "static_cast<uint32_t>(" << prefix << ".size()));" << '\n';
} else if (ttype->is_list()) {
indent(out) << "xfer += oprot->writeListBegin("
<< type_to_enum(((t_list*)ttype)->get_elem_type()) << ", "
<< "static_cast<uint32_t>(" << prefix << ".size()));" << '\n';
}
string iter = tmp("_iter");
out << indent() << type_name(ttype) << "::const_iterator " << iter << ";" << '\n' << indent()
<< "for (" << iter << " = " << prefix << ".begin(); " << iter << " != " << prefix
<< ".end(); ++" << iter << ")" << '\n';
scope_up(out);
if (ttype->is_map()) {
generate_serialize_map_element(out, (t_map*)ttype, iter);
} else if (ttype->is_set()) {
generate_serialize_set_element(out, (t_set*)ttype, iter);
} else if (ttype->is_list()) {
generate_serialize_list_element(out, (t_list*)ttype, iter);
}
scope_down(out);
if (ttype->is_map()) {
indent(out) << "xfer += oprot->writeMapEnd();" << '\n';
} else if (ttype->is_set()) {
indent(out) << "xfer += oprot->writeSetEnd();" << '\n';
} else if (ttype->is_list()) {
indent(out) << "xfer += oprot->writeListEnd();" << '\n';
}
scope_down(out);
}
/**
* Serializes the members of a map.
*
*/
void t_cpp_generator::generate_serialize_map_element(ostream& out, t_map* tmap, string iter) {
t_field kfield(tmap->get_key_type(), iter + "->first");
generate_serialize_field(out, &kfield, "");
t_field vfield(tmap->get_val_type(), iter + "->second");
generate_serialize_field(out, &vfield, "");
}
/**
* Serializes the members of a set.
*/
void t_cpp_generator::generate_serialize_set_element(ostream& out, t_set* tset, string iter) {
t_field efield(tset->get_elem_type(), "(*" + iter + ")");
generate_serialize_field(out, &efield, "");
}
/**
* Serializes the members of a list.
*/
void t_cpp_generator::generate_serialize_list_element(ostream& out, t_list* tlist, string iter) {
t_field efield(tlist->get_elem_type(), "(*" + iter + ")");
generate_serialize_field(out, &efield, "");
}
/**
* Makes a :: prefix for a namespace
*
* @param ns The namespace, w/ periods in it
* @return Namespaces
*/
string t_cpp_generator::namespace_prefix(string ns) {
// Always start with "::", to avoid possible name collisions with
// other names in one of the current namespaces.
//
// We also need a leading space, in case the name is used inside of a
// template parameter. "MyTemplate<::foo::Bar>" is not valid C++,
// since "<:" is an alternative token for "[".
string result = " ::";
if (ns.size() == 0) {
return result;
}
string::size_type loc;
while ((loc = ns.find(".")) != string::npos) {
result += ns.substr(0, loc);
result += "::";
ns = ns.substr(loc + 1);
}
if (ns.size() > 0) {
result += ns + "::";
}
return result;
}
/**
* Opens namespace.
*
* @param ns The namespace, w/ periods in it
* @return Namespaces
*/
string t_cpp_generator::namespace_open(string ns) {
if (ns.size() == 0) {
return "";
}
string result = "";
string separator = "";
string::size_type loc;
while ((loc = ns.find(".")) != string::npos) {
result += separator;
result += "namespace ";
result += ns.substr(0, loc);
result += " {";
separator = " ";
ns = ns.substr(loc + 1);
}
if (ns.size() > 0) {
result += separator + "namespace " + ns + " {";
}
return result;
}
/**
* Closes namespace.
*
* @param ns The namespace, w/ periods in it
* @return Namespaces
*/
string t_cpp_generator::namespace_close(string ns) {
if (ns.size() == 0) {
return "";
}
string result = "}";
string::size_type loc;
while ((loc = ns.find(".")) != string::npos) {
result += "}";
ns = ns.substr(loc + 1);
}
result += " // namespace";
return result;
}
/**
* Returns a C++ type name
*
* @param ttype The type
* @return String of the type name, i.e. std::set<type>
*/
string t_cpp_generator::type_name(t_type* ttype, bool in_typedef, bool arg) {
if (ttype->is_base_type()) {
string bname = base_type_name(((t_base_type*)ttype)->get_base());
std::map<string, std::vector<string>>::iterator it = ttype->annotations_.find("cpp.type");
if (it != ttype->annotations_.end() && !it->second.empty()) {
bname = it->second.back();
}
if (!arg) {
return bname;
}
if (((t_base_type*)ttype)->get_base() == t_base_type::TYPE_STRING) {
return "const " + bname + "&";
} else {
return "const " + bname;
}
}
// Check for a custom overloaded C++ name
if (ttype->is_container()) {
string cname;
t_container* tcontainer = (t_container*)ttype;
if (tcontainer->has_cpp_name()) {
cname = tcontainer->get_cpp_name();
} else if (ttype->is_map()) {
t_map* tmap = (t_map*)ttype;
cname = "std::map<" + type_name(tmap->get_key_type(), in_typedef) + ", "
+ type_name(tmap->get_val_type(), in_typedef) + "> ";
} else if (ttype->is_set()) {
t_set* tset = (t_set*)ttype;
cname = "std::set<" + type_name(tset->get_elem_type(), in_typedef) + "> ";
} else if (ttype->is_list()) {
t_list* tlist = (t_list*)ttype;
cname = "std::vector<" + type_name(tlist->get_elem_type(), in_typedef) + "> ";
}
if (arg) {
return "const " + cname + "&";
} else {
return cname;
}
}
string class_prefix;
if (in_typedef && (ttype->is_struct() || ttype->is_xception())) {
class_prefix = "class ";
}
// Check if it needs to be namespaced
string pname;
t_program* program = ttype->get_program();
if (program != nullptr && program != program_) {
pname = class_prefix + namespace_prefix(program->get_namespace("cpp")) + ttype->get_name();
} else {
pname = class_prefix + ttype->get_name();
}
if (ttype->is_enum() && !gen_pure_enums_) {
pname += "::type";
}
if (arg) {
if (is_complex_type(ttype)) {
return "const " + pname + "&";
} else {
return "const " + pname;
}
} else {
return pname;
}
}
/**
* Returns the C++ type that corresponds to the thrift type.
*
* @param tbase The base type
* @return Explicit C++ type, i.e. "int32_t"
*/
string t_cpp_generator::base_type_name(t_base_type::t_base tbase) {
switch (tbase) {
case t_base_type::TYPE_VOID:
return "void";
case t_base_type::TYPE_STRING:
return "std::string";
case t_base_type::TYPE_BOOL:
return "bool";
case t_base_type::TYPE_I8:
return "int8_t";
case t_base_type::TYPE_I16:
return "int16_t";
case t_base_type::TYPE_I32:
return "int32_t";
case t_base_type::TYPE_I64:
return "int64_t";
case t_base_type::TYPE_DOUBLE:
return "double";
case t_base_type::TYPE_UUID:
// TODO: discuss possibility of a class TUuid;
return "std::string";
default:
throw "compiler error: no C++ base type name for base type " + t_base_type::t_base_name(tbase);
}
}
/**
* Declares a field, which may include initialization as necessary.
*
* @param ttype The type
* @return Field declaration, i.e. int x = 0;
*/
string t_cpp_generator::declare_field(t_field* tfield,
bool init,
bool pointer,
bool constant,
bool reference) {
// TODO(mcslee): do we ever need to initialize the field?
string result = "";
if (constant) {
result += "const ";
}
result += type_name(tfield->get_type());
if (is_reference(tfield)) {
result = "::std::shared_ptr<" + result + ">";
}
if (pointer) {
result += "*";
}
if (reference) {
result += "&";
}
result += " " + tfield->get_name();
if (init) {
t_type* type = get_true_type(tfield->get_type());
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
case t_base_type::TYPE_STRING:
break;
case t_base_type::TYPE_UUID:
result += " = std::string(\"00000000-0000-0000-0000-000000000000\")";
break;
case t_base_type::TYPE_BOOL:
result += " = false";
break;
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
result += " = 0";
break;
case t_base_type::TYPE_DOUBLE:
result += " = 0.0";
break;
default:
throw "compiler error: no C++ initializer for base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
result += " = static_cast<" + type_name(type) + ">(0)";
}
}
if (!reference) {
result += ";";
}
return result;
}
/**
* Renders a function signature of the form 'type name(args)'
*
* @param tfunction Function definition
* @return String of rendered function definition
*/
string t_cpp_generator::function_signature(t_function* tfunction,
string style,
string prefix,
bool name_params) {
t_type* ttype = tfunction->get_returntype();
t_struct* arglist = tfunction->get_arglist();
bool has_xceptions = !tfunction->get_xceptions()->get_members().empty();
if (style == "") {
if (is_complex_type(ttype)) {
return "void " + prefix + tfunction->get_name() + "(" + type_name(ttype)
+ (name_params ? "& _return" : "& /* _return */")
+ argument_list(arglist, name_params, true) + ")";
} else {
return type_name(ttype) + " " + prefix + tfunction->get_name() + "("
+ argument_list(arglist, name_params) + ")";
}
} else if (style.substr(0, 3) == "Cob") {
string cob_type;
string exn_cob;
if (style == "CobCl") {
cob_type = "(" + service_name_ + "CobClient";
if (gen_templates_) {
cob_type += "T<Protocol_>";
}
cob_type += "* client)";
} else if (style == "CobSv") {
cob_type = (ttype->is_void() ? "()" : ("(" + type_name(ttype) + " const& _return)"));
if (has_xceptions) {
exn_cob
= ", ::std::function<void(::apache::thrift::TDelayedException* _throw)> /* exn_cob */";
}
} else {
throw "UNKNOWN STYLE";
}
return "void " + prefix + tfunction->get_name() + "(::std::function<void" + cob_type + "> cob"
+ exn_cob + argument_list(arglist, name_params, true) + ")";
} else {
throw "UNKNOWN STYLE";
}
}
/**
* Renders a field list
*
* @param tstruct The struct definition
* @return Comma sepearated list of all field names in that struct
*/
string t_cpp_generator::argument_list(t_struct* tstruct, bool name_params, bool start_comma) {
string result = "";
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
bool first = !start_comma;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
} else {
result += ", ";
}
result += type_name((*f_iter)->get_type(), false, true) + " "
+ (name_params ? (*f_iter)->get_name() : "/* " + (*f_iter)->get_name() + " */");
}
return result;
}
/**
* Converts the parse type to a C++ enum string for the given type.
*
* @param type Thrift Type
* @return String of C++ code to definition of that type constant
*/
string t_cpp_generator::type_to_enum(t_type* type) {
type = get_true_type(type);
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "NO T_VOID CONSTRUCT";
case t_base_type::TYPE_STRING:
return "::apache::thrift::protocol::T_STRING";
case t_base_type::TYPE_BOOL:
return "::apache::thrift::protocol::T_BOOL";
case t_base_type::TYPE_I8:
return "::apache::thrift::protocol::T_BYTE";
case t_base_type::TYPE_I16:
return "::apache::thrift::protocol::T_I16";
case t_base_type::TYPE_I32:
return "::apache::thrift::protocol::T_I32";
case t_base_type::TYPE_I64:
return "::apache::thrift::protocol::T_I64";
case t_base_type::TYPE_DOUBLE:
return "::apache::thrift::protocol::T_DOUBLE";
case t_base_type::TYPE_UUID:
return "::apache::thrift::protocol::T_UUID";
default:
break;
}
} else if (type->is_enum()) {
return "::apache::thrift::protocol::T_I32";
} else if (type->is_struct()) {
return "::apache::thrift::protocol::T_STRUCT";
} else if (type->is_xception()) {
return "::apache::thrift::protocol::T_STRUCT";
} else if (type->is_map()) {
return "::apache::thrift::protocol::T_MAP";
} else if (type->is_set()) {
return "::apache::thrift::protocol::T_SET";
} else if (type->is_list()) {
return "::apache::thrift::protocol::T_LIST";
}
throw "INVALID TYPE IN type_to_enum: " + type->get_name();
}
bool t_cpp_generator::is_struct_storage_not_throwing(t_struct* tstruct) const {
vector<t_field*> members = tstruct->get_members();
for(size_t i=0; i < members.size(); ++i) {
t_type* type = get_true_type(members[i]->get_type());
if(type->is_enum())
continue;
if(type->is_xception())
return false;
if(type->is_base_type()) switch(((t_base_type*)type)->get_base()) {
case t_base_type::TYPE_BOOL:
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
case t_base_type::TYPE_DOUBLE:
continue;
case t_base_type::TYPE_VOID:
case t_base_type::TYPE_STRING:
case t_base_type::TYPE_UUID:
default:
return false;
}
if(type->is_struct()) {
const vector<t_field*>& more = ((t_struct*)type)->get_members();
for(auto it = more.begin(); it < more.end(); ++it) {
if(std::find(members.begin(), members.end(), *it) == members.end())
members.push_back(*it);
}
continue;
}
return false; // rest-as-throwing(require-alloc)
}
return true;
}
string t_cpp_generator::get_include_prefix(const t_program& program) const {
string include_prefix = program.get_include_prefix();
if (!use_include_prefix_ || (include_prefix.size() > 0 && include_prefix[0] == '/')) {
// if flag is turned off or this is absolute path, return empty prefix
return "";
}
string::size_type last_slash = string::npos;
if ((last_slash = include_prefix.rfind("/")) != string::npos) {
return include_prefix.substr(0, last_slash)
+ (get_program()->is_out_path_absolute() ? "/" : "/" + out_dir_base_ + "/");
}
return "";
}
string t_cpp_generator::get_legal_program_name(std::string program_name)
{
std::size_t found = 0;
while(true) {
found = program_name.find('.');
if(found != string::npos) {
program_name = program_name.replace(found, 1, "_");
} else {
break;
}
}
return program_name;
}
std::string t_cpp_generator::display_name() const {
return "C++";
}
THRIFT_REGISTER_GENERATOR(
cpp,
"C++",
" cob_style: Generate \"Continuation OBject\"-style classes.\n"
" no_client_completion:\n"
" Omit calls to completion__() in CobClient class.\n"
" no_default_operators:\n"
" Omits generation of default operators ==, != and <\n"
" templates: Generate templatized reader/writer methods.\n"
" pure_enums: Generate pure enums instead of wrapper classes.\n"
" include_prefix: Use full include paths in generated files.\n"
" moveable_types: Generate move constructors and assignment operators.\n"
" no_ostream_operators:\n"
" Omit generation of ostream definitions.\n"
" no_skeleton: Omits generation of skeleton.\n")