Struct MetadataServiceClient 

pub struct MetadataServiceClient<T> { /* private fields */ }

Implementations

impl MetadataServiceClient<Channel>

pub async fn connect<D>(dst: D) -> Result<Self, Error>

where D: TryInto<Endpoint>, D::Error: Into<StdError>,

Attempt to create a new client by connecting to a given endpoint.

impl<T> MetadataServiceClient<T>

where T: GrpcService<BoxBody>, T::Error: Into<StdError>, T::ResponseBody: Body<Data = Bytes> + Send + 'static, <T::ResponseBody as Body>::Error: Into<StdError> + Send,

pub fn new(inner: T) -> Self

pub fn with_origin(inner: T, origin: Uri) -> Self

pub fn with_interceptor<F>( inner: T, interceptor: F, ) -> MetadataServiceClient<InterceptedService<T, F>>

where F: Interceptor, T::ResponseBody: Default, T: Service<Request<BoxBody>, Response = Response<<T as GrpcService<BoxBody>>::ResponseBody>>, <T as Service<Request<BoxBody>>>::Error: Into<StdError> + Send + Sync,

pub fn send_compressed(self, encoding: CompressionEncoding) -> Self

Compress requests with the given encoding.

This requires the server to support it otherwise it might respond with an error.

pub fn accept_compressed(self, encoding: CompressionEncoding) -> Self

Enable decompressing responses.

pub fn max_decoding_message_size(self, limit: usize) -> Self

Limits the maximum size of a decoded message.

Default: 4MB

pub fn max_encoding_message_size(self, limit: usize) -> Self

Limits the maximum size of an encoded message.

Default: usize::MAX

pub async fn get_shards( &mut self, request: impl IntoRequest<GetShardsRequest>, ) -> Result<Response<GetShardsResponse>, Status>

List all known shards.

pub async fn get_column_families( &mut self, request: impl IntoRequest<GetColumnFamiliesRequest>, ) -> Result<Response<GetColumnFamiliesResponse>, Status>

List all registered column families.

pub async fn propose_op( &mut self, request: impl IntoRequest<ProposeMetadataOpRequest>, ) -> Result<Response<ProposeMetadataOpResponse>, Status>

Propose a metadata change through the metadata Raft group.

pub async fn get_shard_for_key( &mut self, request: impl IntoRequest<GetShardForKeyRequest>, ) -> Result<Response<GetShardForKeyResponse>, Status>

Find the shard responsible for a (CF, key) pair.

pub async fn register_node( &mut self, request: impl IntoRequest<RegisterNodeRequest>, ) -> Result<Response<RegisterNodeResponse>, Status>

Register a data node so the metadata service knows its addresses. Called by each data node on startup.

pub async fn subscribe_shard_events( &mut self, request: impl IntoRequest<SubscribeShardEventsRequest>, ) -> Result<Response<Streaming<ShardEventProto>>, Status>

Subscribe to shard lifecycle events (server-streaming). The server first streams a full state snapshot (all current shards, nodes, and column families as synthetic events), then streams live updates as they are committed through the metadata Raft group.

pub async fn report_node_stats( &mut self, request: impl IntoRequest<ReportNodeStatsRequest>, ) -> Result<Response<ReportNodeStatsResponse>, Status>

Data nodes periodically report their per-shard/per-CF stats. Stats are cached in memory (not replicated via Raft).

pub async fn train_vector_index( &mut self, request: impl IntoRequest<TrainVectorIndexRequest>, ) -> Result<Response<TrainVectorIndexResponse>, Status>

Train a vector index (orchestrated by metadata service). For IVF-PQ/IVF-SQ: global centroid training + distribute to nodes. For SPFresh: local training on each node.

pub async fn train_coarse_routing( &mut self, request: impl IntoRequest<TrainCoarseRoutingRequest>, ) -> Result<Response<TrainCoarseRoutingResponse>, Status>

Train coarse routing centroids for SPFresh (two-level routing).

Trait Implementations

impl<T: Clone> Clone for MetadataServiceClient<T>

fn clone(&self) -> MetadataServiceClient<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for MetadataServiceClient<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.