DdlContext

common_meta::ddl

Struct DdlContext 

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pub struct DdlContext {
    pub node_manager: NodeManagerRef,
    pub cache_invalidator: CacheInvalidatorRef,
    pub memory_region_keeper: MemoryRegionKeeperRef,
    pub leader_region_registry: LeaderRegionRegistryRef,
    pub table_metadata_manager: TableMetadataManagerRef,
    pub table_metadata_allocator: TableMetadataAllocatorRef,
    pub flow_metadata_manager: FlowMetadataManagerRef,
    pub flow_metadata_allocator: FlowMetadataAllocatorRef,
    pub region_failure_detector_controller: RegionFailureDetectorControllerRef,
}
Expand description

The context of ddl.

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§node_manager: NodeManagerRef

Sends querying and requests to nodes.

§cache_invalidator: CacheInvalidatorRef

Cache invalidation.

§memory_region_keeper: MemoryRegionKeeperRef

Keep tracking operating regions.

§leader_region_registry: LeaderRegionRegistryRef

The leader region registry.

§table_metadata_manager: TableMetadataManagerRef

Table metadata manager.

§table_metadata_allocator: TableMetadataAllocatorRef

Allocator for table metadata.

§flow_metadata_manager: FlowMetadataManagerRef

Flow metadata manager.

§flow_metadata_allocator: FlowMetadataAllocatorRef

Allocator for flow metadata.

§region_failure_detector_controller: RegionFailureDetectorControllerRef

controller of region failure detector.

Implementations§

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impl DdlContext

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pub async fn register_failure_detectors( &self, detecting_regions: Vec<DetectingRegion>, )

Notifies the RegionSupervisor to register failure detector of new created regions.

The datanode may crash without sending a heartbeat that contains information about newly created regions, which may prevent the RegionSupervisor from detecting failures in these newly created regions.

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async fn deregister_failure_detectors( &self, detecting_regions: Vec<DetectingRegion>, )

Notifies the RegionSupervisor to remove failure detectors.

Once the regions were dropped, subsequent heartbeats no longer include these regions. Therefore, we should remove the failure detectors for these dropped regions.

Trait Implementations§

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impl Clone for DdlContext

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fn clone(&self) -> DdlContext

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more

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