Helper class for creating google::protobuf::Message objects that are not statically compiled into the application. More...

#include <dccl/dynamic_protobuf_manager.h>

Public Member Functions
	DynamicProtobufManager (const DynamicProtobufManager &)=delete

DynamicProtobufManager &	operator= (const DynamicProtobufManager &)=delete

Static Public Member Functions
static const google::protobuf::Descriptor *	find_descriptor (const std::string &protobuf_type_name, bool user_pool_first=false)
	Finds the Google Protobuf Descriptor (essentially a meta-class for a given Message) from a given Message name. More...

template<typename GoogleProtobufMessagePointer >
static GoogleProtobufMessagePointer	new_protobuf_message (const std::string &protobuf_type_name, bool user_pool_first=false)
	Create a new (empty) Google Protobuf message of a given type by name. More...

template<typename GoogleProtobufMessagePointer >
static GoogleProtobufMessagePointer	new_protobuf_message (const google::protobuf::Descriptor *desc)
	Create a new (empty) Google Protobuf message of a given type by Descriptor. More...

static std::shared_ptr< google::protobuf::Message >	new_protobuf_message (const google::protobuf::Descriptor *desc)
	Create a new (empty) Google Protobuf message of a given type by Descriptor. More...

static std::shared_ptr< google::protobuf::Message >	new_protobuf_message (const std::string &protobuf_type_name)
	Create a new (empty) Google Protobuf message of a given type by name. More...

static void	add_database (std::shared_ptr< google::protobuf::DescriptorDatabase > database)
	Add a Google Protobuf DescriptorDatabase to the set of databases searched for Message Descriptors.

static void	enable_compilation ()
	Enable on the fly compilation of .proto files on the local disk. Must be called before load_from_proto_file() is called.

static const google::protobuf::FileDescriptor *	load_from_proto_file (const std::string &protofile_absolute_path)
	Load a message from a .proto file on the disk. enable_compilation() must be called first. More...

static void	add_include_path (const std::string &path)
	Add a path for searching for import messages when loading .proto files using load_from_proto_file() More...

static void *	load_from_shared_lib (const std::string &shared_lib_path)
	Load compiled .proto files from a UNIX shared library (i.e. .so or .dylib) More...

static void	protobuf_shutdown ()

static const google::protobuf::FileDescriptor *	add_protobuf_file (const google::protobuf::FileDescriptorProto &proto)
	Add a protobuf file defined in a google::protobuf::FileDescriptorProto.

static void	reset ()

static void	custom_deleter (DynamicProtobufManager *obj)

static google::protobuf::DynamicMessageFactory &	msg_factory ()

static google::protobuf::DescriptorPool &	user_descriptor_pool ()

static google::protobuf::SimpleDescriptorDatabase &	simple_database ()

template<typename ReturnType , typename... Args1, typename... Args2>
static ReturnType	msg_factory_call (ReturnType(google::protobuf::DynamicMessageFactory::*func)(Args1...) const, Args2... args)

template<typename ReturnType , typename... Args1, typename... Args2>
static ReturnType	user_descriptor_pool_call (ReturnType(google::protobuf::DescriptorPool::*func)(Args1...) const, Args2... args)

template<typename ReturnType , typename... Args1, typename... Args2>
static ReturnType	simple_database_call (ReturnType(google::protobuf::SimpleDescriptorDatabase::*func)(Args1...) const, Args2... args)

Detailed Description

Helper class for creating google::protobuf::Message objects that are not statically compiled into the application.

Definition at line 47 of file dynamic_protobuf_manager.h.

Member Function Documentation

◆ add_include_path()

void dccl::DynamicProtobufManager::add_include_path ( const std::string & path )

static

Add a path for searching for import messages when loading .proto files using load_from_proto_file()

Exceptions

Exception If enable_compilation() has not been called before using this function.

Definition at line 87 of file dynamic_protobuf_manager.cpp.

◆ find_descriptor()

const google::protobuf::Descriptor * dccl::DynamicProtobufManager::find_descriptor	(	const std::string &	protobuf_type_name,
		bool	user_pool_first = `false`
	)

static

Finds the Google Protobuf Descriptor (essentially a meta-class for a given Message) from a given Message name.

Parameters

protobuf_type_name	The fully qualified name of the Google Protobuf Message including package name. E.g. in the .proto file: package dccl.protobuf message A { } would result in protobuf_type_name == "dccl.protobuf.A"
user_pool_first	Search the user pool first, then the generated (compiled-in) pool (useful in case the generated pool is missing extensions that are in the user pool)

Returns: A pointer to the google::protobuf::Descriptor (or nullptr if not found)

Definition at line 37 of file dynamic_protobuf_manager.cpp.

◆ load_from_proto_file()

const google::protobuf::FileDescriptor * dccl::DynamicProtobufManager::load_from_proto_file ( const std::string & protofile_absolute_path )

static

Load a message from a .proto file on the disk. enable_compilation() must be called first.

Parameters

protofile_absolute_path

It is critical that the argument be the absolute, canonical path to the file. (No relative paths and no "." or "..") This could be achieved, e.g., by using Boost filesystem as follows...

boost::filesystem::path abs_path = boost::filesystem::complete(rel_path);

abs_path.normalize();

Exceptions

Exception	If enable_compilation() has not been called before using this function
Exception	If any error exists in locating or parsing this .proto file.

It is critical that the argument be the absolute, canonical path to the file. This could be achieved, e.g., by using Boost filesystem as follows... boost::filesystem::path abs_path = boost::filesystem::complete(rel_path); abs_path.normalize();

Definition at line 113 of file dynamic_protobuf_manager.cpp.

◆ load_from_shared_lib()

void * dccl::DynamicProtobufManager::load_from_shared_lib ( const std::string & shared_lib_path )

static

Load compiled .proto files from a UNIX shared library (i.e. *.so or *.dylib)

Parameters

shared_lib_path Path to shared library. May be relative if known by ld.so

Definition at line 98 of file dynamic_protobuf_manager.cpp.

◆ new_protobuf_message() [1/4]

template<typename GoogleProtobufMessagePointer >

static GoogleProtobufMessagePointer dccl::DynamicProtobufManager::new_protobuf_message ( const google::protobuf::Descriptor * desc )

inlinestatic

Create a new (empty) Google Protobuf message of a given type by Descriptor.

Parameters

desc	The Google Protobuf Descriptor of the message to create.

Template Parameters

GoogleProtobufMessagePointer A pointer or anything that acts like a pointer (has operator*()) to a google::protobuf::Message

Returns: A pointer to the newly created object. Deleting the memory is up to the caller of this function, so smart pointers (e.g. std::shared_ptr<google::protobuf::Message>) are recommended.

Definition at line 99 of file dynamic_protobuf_manager.h.

◆ new_protobuf_message() [2/4]

std::shared_ptr< google::protobuf::Message > dccl::DynamicProtobufManager::new_protobuf_message ( const google::protobuf::Descriptor * desc )

static

Create a new (empty) Google Protobuf message of a given type by Descriptor.

Parameters

desc	The Google Protobuf Descriptor of the message to create.

Returns: A std::shared_ptr to the newly created object.

Definition at line 66 of file dynamic_protobuf_manager.cpp.

◆ new_protobuf_message() [3/4]

std::shared_ptr< google::protobuf::Message > dccl::DynamicProtobufManager::new_protobuf_message ( const std::string & protobuf_type_name )

static

Create a new (empty) Google Protobuf message of a given type by name.

Parameters

protobuf_type_name The full name (including package) of the Google Protobuf message to create (e.g. "package.MyMessage").

Returns: A std::shared_ptr to the newly created object.

Definition at line 73 of file dynamic_protobuf_manager.cpp.

◆ new_protobuf_message() [4/4]

template<typename GoogleProtobufMessagePointer >

static GoogleProtobufMessagePointer dccl::DynamicProtobufManager::new_protobuf_message	(	const std::string &	protobuf_type_name,
		bool	user_pool_first = `false`
	)

inlinestatic

Create a new (empty) Google Protobuf message of a given type by name.

Parameters

protobuf_type_name

The fully qualified name of the Google Protobuf Message including package name. E.g. in the .proto file:

package dccl.protobuf

message A { }

would result in protobuf_type_name == "dccl.protobuf.A"

Template Parameters

GoogleProtobufMessagePointer A pointer or anything that acts like a pointer (has operator*()) to a google::protobuf::Message

Returns: A pointer to the newly created object. Deleting the memory is up to the caller of this function, so smart pointers (e.g. std::shared_ptr<google::protobuf::Message>) are recommended.

Definition at line 77 of file dynamic_protobuf_manager.h.

The documentation for this class was generated from the following files:

dccl/dynamic_protobuf_manager.h
src/dynamic_protobuf_manager.cpp

Public Member Functions

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ add_include_path()

◆ find_descriptor()

◆ load_from_proto_file()

◆ load_from_shared_lib()

◆ new_protobuf_message() [1/4]

◆ new_protobuf_message() [2/4]

◆ new_protobuf_message() [3/4]

◆ new_protobuf_message() [4/4]