構成と調整（ConCal）

// Example of a configuration message.
message SampleServiceBundleConfig
{
 bool bool_parameter = 1;
 int64 int_parameter = 2;
 float float_parameter = 3;
 string str_parameter = 4;
 repeated string list_parameter = 5;
 map<string, int32> map_parameter = 6;
 SomeNestedMessage nested_parameter = 7;
 SomeComplexMessage complex_parameter = 8;
 some.nested.package.SomeNestedMessage nested_package = 9;
 bytes bytes_parameter = 10;
}

// Unique identifier for the config.
message ConfigId {
  // The FQIN of the service bundle that owns the configuration.
  com.sdv.google.sd_common.ServiceFqin service_fqin = 1;

  // The name of the config.
  string config_name = 2;
}

// Key-value pair to update configuration.
message ConfigOverrideKeyValue {
  string key = 1;

  oneof value {
    string value_txtproto = 2;
    .google.protobuf.Any value_any = 3;
  }
}

// A collection of changes for a specific configuration which should be atomically applied.
message ConfigOverride {
  string override_id = 1;

  ConfigId config_id = 2;

  repeated ConfigOverrideKeyValue pairs = 3;
}

package: "com.sdv.oem.sample.concal"

service_bundle {
  name: "SampleOemConCalClientServiceBundle"
  client {
    service: "com.sdv.google.concal.ConCalRegistrationService"
  }
}

pub struct ExampleConcalBundle {
    context: ContextRef,
    runtime: Option<Runtime>,
}

sdv::lifecycle::register_service_bundle!(ExampleConcalBundle);

impl ServiceBundle for ExampleConcalBundle {
    fn new(context: ContextRef) -> ExampleConcalBundle {
        info!("Creating {}.", context.get_self_fqin());

        ExampleConcalBundle { context, runtime: None }
    }

    fn on_start(&mut self) {
        let fqin = self.context.get_self_fqin();
        info!("Starting {}.", fqin);

        let runtime = Builder::new_multi_thread()
            .worker_threads(4)
            .thread_name("tokio-pool")
            .enable_all()
            .build()
            .unwrap();
        let context = self.context;
        runtime.spawn(async move {
            let registration_client = setup_register_config_rpc(context).await;
            /* main SB logic here */
        });
        self.runtime = Some(runtime);
    }

async fn setup_register_config_rpc(context: ContextRef) -> RegistrationClient {
    let sdv_comms = SdvComms { context };
    let sd = ServiceDiscoveryManager::new(context);
    let unit_name_args = UnitNameDiscoveryArgs::new_builder()
        .set_sdv_package_name("com.sdv.oem.sample.concal")
        .set_service_bundle_name("SampleOemConCalServiceBundle")
        .set_service_unit_name(RegistrationClient::DEFAULT_UNIT_NAME)
        .build()
        .unwrap();

    let mut unit_name_stream =
        sd.subscribe_service_unit_change_by_name(&unit_name_args).await.unwrap();

    // wait until RPC servers are registered, if server is not a custom agent
    while let Some(event) = unit_name_stream.next().await {
        if let ServiceUnitChangeEvent::Registered(sud) = event {
            let service_identity = sud.get_service_bundle_identity();
            let fqin = service_identity.get_fqin();
            if fqin.get_sdv_package_name() == "com.sdv.oem.sample.concal"
                && fqin.get_service_bundle_name() == "SampleOemConCalServiceBundle"
                && fqin.get_service_instance_name() == "default"
            {
                break;
            }
        }
    }

    let service_bundle =
        SampleOemConCalClientServiceBundle::new(Arc::new(sdv_comms)).await.unwrap();
    service_bundle
        .create_rpc_client::<RegistrationClient>(
            UnitName::builder()
                .package_name("com.sdv.oem.sample.concal")
                .bundle_name("SampleOemConCalServiceBundle")
                .service_unit_name(RegistrationClient::DEFAULT_UNIT_NAME)
                .build()
                .unwrap(),
            ClientOptions::default(),
        )
        .await
        .expect("Failed to create an RPC client")
}

impl ServiceBundle for ExampleConcalBundle{

    /* ... */
    fn on_start(&mut self) {
        /* ... */
        runtime.spawn(async move {
            let registration_client = setup_register_config_rpc(context).await;
            sample_concal_main(fqin, registration_client).await
        });
        self.runtime = Some(runtime);
    }
}

async fn sample_concal_main(
    fqin: ServiceFqin,
    registration_client: RegistrationClient,
) -> sdv::status::SdvResult<()> {
    let config = get_rear_view_camera_factory_config();
    let config_id = get_config_id(&fqin);

    register_config(&registration_client, &config_id, &config).await;
    /* ... */
}

fn get_rear_view_camera_factory_config() -> RearViewCamera {
    RearViewCamera {
        model: String::from("model 1"),
        horizontal_resolution: 720,
        vertical_resolution: 720,
        x_axis_field_of_view: 70.0,
        y_axis_field_of_view: 70.0,
        is_rgb: false,
        ..Default::default()
    }
}

fn get_config_id(fqin: &ServiceFqin) -> ConfigId {
    ConfigId {
        config_name: "config".to_string(),
        service_fqin: MessageField::some(ProtoFqin {
            vm_name: fqin.get_sdv_vm_name().to_string(),
            package_name: fqin.get_sdv_package_name().to_string(),
            service_name: fqin.get_service_bundle_name().to_string(),
            instance_name: fqin.get_service_instance_name().to_string(),
            ..Default::default()
        }),
        ..Default::default()
    }
}

async fn register_config(
    client: &RegistrationClient,
    config_id: &ConfigId,
    config: &RearViewCamera,
) {
    let config_fd = FileDescriptorSet {
        file: vec![RearViewCamera::descriptor().file_descriptor_proto().clone()],
        ..Default::default()
    };
    let config = Any::pack(config).expect("Failed to pack config");
    let config_metadata = ConfigMetadata {
        descriptor_set: MessageField::some(config_fd),
        default_config: MessageField::some(config.clone()),
        ..Default::default()
    };

    client
        .RegisterConfigMetadata(&RegisterConfigMetadataRequest {
            config_id: MessageField::some(config_id.clone()),
            metadata: MessageField::some(config_metadata),
            config_version: String::from("1.0"),
            ..Default::default()
        })
        .await
        .expect(
            "RegisterConfigMetadata should not fail, even if configuration was registered before",
        );
}

async fn sample_concal_main(
    fqin: ServiceFqin,
    registration_client: RegistrationClient,
    update_client: UpdateClient,
) -> sdv::status::SdvResult<()> {
    let config = get_rear_view_camera_factory_config();
    let config_id = get_config_id(&fqin);

    register_config(&registration_client, &config_id, &config).await;
    let config = get_config(&registration_client, &config_id).await;
    info!("Retrieved configuration:\n{config:#?}");

    // Onwards, use configuration in bundle's main business logic
    /* ... */
}

async fn get_config(client: &RegistrationClient, config_id: &ConfigId) -> RearViewCamera {
    let bytes = client
        .GetConfig(&GetConfigRequest {
            config_id: MessageField::some(config_id.clone()),
            ..Default::default()
        })
        .await
        .expect("Get config does not fail, as config was registered before")
        .config;
    RearViewCamera::parse_from_bytes(&bytes).expect("parse_from_bytes failed")
}