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 extern crate 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

Step 1

create a project to generate proto

sh $ cargo new proto

Add this to Cargo.toml:

``` [dependencies] protobuf = "2.8.0"

[build-dependencies] protoc-rust = "2.8.0" protobufmessagefactory = "0.1.3" ```

Step 2

add .proto file into src/

Step 3

add codes to build.rs

```rust extern crate protobufmessagefactory;

use protobufmessagefactory::*;

...

fn main() {

let proto_path = "src/";

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);

} ```

Step 4

add proto deps into your project's toml

[dependencies] proto = {version="^0", path="proto_path"} step 1 create a proj named proto, replace proto_path into yours

License

MIT