protobufmessagefactory

this repo provide you a way to generate a message factory to create a message instance by message name.

cpp //use can do this in cpp google::protobuf::Descriptor* desc = google::protobuf::DescriptorPool::generated_pool() ->FindMessageTypeByName("mypkg.MyType"); google::protobuf::Message* message = google::protobuf::MessageFactory::generated_factory() ->GetPrototype(desc)->New();

```rust mod proto;

use proto::factory::*;

//now you can do this in rust let desc = getdescriptor("mypkg.MyType".tostring()).unwrap(); let message = desc.new_instance(); ```

API Docs: https://docs.rs/protobufmessagefactory

Usage

Add this to your Cargo.toml:

[build-dependencies] protobuf_message_factory = "0.1.1"

add code to build.rs

```rust extern crate protobufmessagefactory;

use protobufmessagefactory::*;

...

fn main() {

let proto_path = "src/proto";

let proto_files = get_protos_info(proto_path);
let proto_messages = get_proto_list(&proto_files);


//!!!   this is importent.   !!!
protoc_rust::run(protoc_rust::Args {
    out_dir: proto_path,
    input: &protos,
    includes: &[proto_path],
    customize: Customize {
      ..Default::default()
    },
}).expect("protoc");

//now generate factory codes
generate_factory_file(proto_path, &proto_files);

} ```

then add a empty file named mod.rs to proto_path, then put all proto files to proto_path.

now cargo build will generate factory.rs, mod.rs and proto's rs files.

License

MIT