Struct mz_storage_controller::instance::ReplicaTask

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struct ReplicaTask<T> {
    replica_id: ReplicaId,
    config: ReplicaConfig,
    epoch: ClusterStartupEpoch,
    metrics: ReplicaMetrics,
    command_rx: UnboundedReceiver<StorageCommand<T>>,
    response_tx: UnboundedSender<StorageResponse<T>>,
}
Expand description

A task handling communication with a replica.

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§replica_id: ReplicaId

The ID of the replica.

§config: ReplicaConfig

Replica configuration.

§epoch: ClusterStartupEpoch

The epoch identifying this incarnation of the replica.

§metrics: ReplicaMetrics

Replica metrics.

§command_rx: UnboundedReceiver<StorageCommand<T>>

A channel upon which commands intended for the replica are delivered.

§response_tx: UnboundedSender<StorageResponse<T>>

A channel upon which responses from the replica are delivered.

Implementations§

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impl<T> ReplicaTask<T>

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async fn run(self)

Runs the replica task.

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async fn connect( &self, ) -> Partitioned<StorageGrpcClient, StorageCommand<T>, StorageResponse<T>>

Connects to the replica.

The connection is retried forever (with backoff) and this method returns only after a connection was successfully established.

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async fn run_message_loop( self, client: Partitioned<StorageGrpcClient, StorageCommand<T>, StorageResponse<T>>, ) -> Result<(), Error>

Runs the message loop.

Returns (with an Err) if it encounters an error condition (e.g. the replica disconnects). If no error condition is encountered, the task runs until the controller disconnects from the command channel, or the task is dropped.

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fn specialize_command(&self, command: &mut StorageCommand<T>)

Specialize a command for the given replica configuration.

Most StorageCommands are independent of the target replica, but some contain replica-specific fields that must be adjusted before sending.

Auto Trait Implementations§

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impl<T> Freeze for ReplicaTask<T>

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impl<T> !RefUnwindSafe for ReplicaTask<T>

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impl<T> Send for ReplicaTask<T>
where T: Send,

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impl<T> Sync for ReplicaTask<T>
where T: Send,

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impl<T> Unpin for ReplicaTask<T>

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impl<T> !UnwindSafe for ReplicaTask<T>

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