Trait WorkerChannel 

pub trait WorkerChannel: Send + Sync {
    // Required methods
    fn coordinator_channel<'life0, 'async_trait>(
        &'life0 mut self,
        headers: HeaderMap,
        c2w_stream: BoxStream<'static, CoordinatorToWorkerMsg>,
    ) -> Pin<Box<dyn Future<Output = Result<BoxStream<'static, Result<WorkerToCoordinatorMsg>>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn execute_task<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        headers: HeaderMap,
        request: ExecuteTaskRequest,
        metrics: ExecutionPlanMetricsSet,
        task_ctx: &'life1 Arc<TaskContext>,
    ) -> Pin<Box<dyn Future<Output = Result<Vec<BoxStream<'static, Result<RecordBatch>>>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn get_worker_info<'life0, 'async_trait>(
        &'life0 mut self,
        request: GetWorkerInfoRequest,
    ) -> Pin<Box<dyn Future<Output = Result<GetWorkerInfoResponse>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}

Abstraction over the specific transport protocol implementation.

WARNING: The API in this trait is unstable, and it’s subject to change as more things get properly decoupled from details like protobuf serialization and http headers.

Required Methods

fn coordinator_channel<'life0, 'async_trait>( &'life0 mut self, headers: HeaderMap, c2w_stream: BoxStream<'static, CoordinatorToWorkerMsg>, ) -> Pin<Box<dyn Future<Output = Result<BoxStream<'static, Result<WorkerToCoordinatorMsg>>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Establishes a bidirectional message stream between a coordinator and a worker, over which messages will be exchanged at any time during a query’s lifetime. It’s expected to be one coordinator channel per task.

fn execute_task<'life0, 'life1, 'async_trait>( &'life0 mut self, headers: HeaderMap, request: ExecuteTaskRequest, metrics: ExecutionPlanMetricsSet, task_ctx: &'life1 Arc<TaskContext>, ) -> Pin<Box<dyn Future<Output = Result<Vec<BoxStream<'static, Result<RecordBatch>>>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Executes the requested partition range of a subplan previously sent by the coordinator channel.

fn get_worker_info<'life0, 'async_trait>( &'life0 mut self, request: GetWorkerInfoRequest, ) -> Pin<Box<dyn Future<Output = Result<GetWorkerInfoResponse>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Returns metadata about a worker. Currently only used for worker versioning.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors