meta_srv::procedure::region_migration

Struct Context

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pub struct Context {
    persistent_ctx: PersistentContext,
    volatile_ctx: VolatileContext,
    table_metadata_manager: TableMetadataManagerRef,
    opening_region_keeper: MemoryRegionKeeperRef,
    region_failure_detector_controller: RegionFailureDetectorControllerRef,
    mailbox: MailboxRef,
    server_addr: String,
    cache_invalidator: CacheInvalidatorRef,
}
Expand description

The context of procedure execution.

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§persistent_ctx: PersistentContext§volatile_ctx: VolatileContext§table_metadata_manager: TableMetadataManagerRef§opening_region_keeper: MemoryRegionKeeperRef§region_failure_detector_controller: RegionFailureDetectorControllerRef§mailbox: MailboxRef§server_addr: String§cache_invalidator: CacheInvalidatorRef

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impl Context

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pub fn next_operation_timeout(&self) -> Option<Duration>

Returns the next operation’s timeout.

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pub fn update_operations_elapsed(&mut self, instant: Instant)

Updates operations elapsed.

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pub fn server_addr(&self) -> &str

Returns address of meta server.

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pub async fn get_table_route_value( &mut self, ) -> Result<&DeserializedValueWithBytes<TableRouteValue>>

Returns the table_route of VolatileContext if any. Otherwise, returns the value retrieved from remote.

Retry:

  • Failed to retrieve the metadata of table.
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pub async fn register_failure_detectors(&self)

Notifies the RegionSupervisor to register failure detectors of failed region.

The original failure detector was removed once the procedure was triggered. Now, we need to register the failure detector for the failed region again.

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pub async fn deregister_failure_detectors(&self)

Notifies the RegionSupervisor to deregister failure detectors.

The original failure detectors was removed once the procedure was triggered. However, the from_peer may still send the heartbeats contains the failed region.

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pub fn remove_table_route_value(&mut self) -> bool

Removes the table_route of VolatileContext, returns true if any.

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pub async fn get_table_info_value( &mut self, ) -> Result<&DeserializedValueWithBytes<TableInfoValue>>

Returns the table_info of VolatileContext if any. Otherwise, returns the value retrieved from remote.

Retry:

  • Failed to retrieve the metadata of table.
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pub async fn get_from_peer_datanode_table_value( &mut self, ) -> Result<&DatanodeTableValue>

Returns the table_info of VolatileContext if any. Otherwise, returns the value retrieved from remote.

Retry:

  • Failed to retrieve the metadata of datanode.
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pub fn region_id(&self) -> RegionId

Returns the RegionId.

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pub async fn invalidate_table_cache(&self) -> Result<()>

Broadcasts the invalidate table cache message.

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