Trait mz_storage_client::controller::StorageController

pub trait StorageController: Debug {
    type Timestamp: TimelyTimestamp;

    // Required methods
    fn initialization_complete(&mut self);
    fn allow_writes<'life0, 'async_trait>(
        &'life0 mut self,
        register_ts: Option<Self::Timestamp>
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn update_parameters(&mut self, config_params: StorageParameters);
    fn config(&self) -> &StorageConfiguration;
    fn collection_metadata(
        &self,
        id: GlobalId
    ) -> Result<CollectionMetadata, StorageError<Self::Timestamp>>;
    fn collection_frontiers(
        &self,
        id: GlobalId
    ) -> Result<(Antichain<Self::Timestamp>, Antichain<Self::Timestamp>), StorageError<Self::Timestamp>>;
    fn collections_frontiers(
        &self,
        id: Vec<GlobalId>
    ) -> Result<Vec<(GlobalId, Antichain<Self::Timestamp>, Antichain<Self::Timestamp>)>, StorageError<Self::Timestamp>>;
    fn active_collection_metadatas(&self) -> Vec<(GlobalId, CollectionMetadata)>;
    fn check_exists(
        &self,
        id: GlobalId
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn create_instance(&mut self, id: StorageInstanceId);
    fn drop_instance(&mut self, id: StorageInstanceId);
    fn connect_replica(
        &mut self,
        instance_id: StorageInstanceId,
        replica_id: ReplicaId,
        location: ClusterReplicaLocation
    );
    fn drop_replica(
        &mut self,
        instance_id: StorageInstanceId,
        replica_id: ReplicaId
    );
    fn create_collections<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        storage_metadata: &'life1 StorageMetadata,
        register_ts: Option<Self::Timestamp>,
        collections: Vec<(GlobalId, CollectionDescription<Self::Timestamp>)>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn check_alter_ingestion_source_desc(
        &mut self,
        ingestion_id: GlobalId,
        source_desc: &SourceDesc
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn alter_ingestion_source_desc<'life0, 'async_trait>(
        &'life0 mut self,
        ingestion_id: GlobalId,
        source_desc: SourceDesc
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn alter_ingestion_connections<'life0, 'async_trait>(
        &'life0 mut self,
        source_connections: BTreeMap<GlobalId, GenericSourceConnection<InlinedConnection>>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn export(
        &self,
        id: GlobalId
    ) -> Result<&ExportState<Self::Timestamp>, StorageError<Self::Timestamp>>;
    fn export_mut(
        &mut self,
        id: GlobalId
    ) -> Result<&mut ExportState<Self::Timestamp>, StorageError<Self::Timestamp>>;
    fn create_exports<'life0, 'async_trait>(
        &'life0 mut self,
        exports: Vec<(GlobalId, ExportDescription<Self::Timestamp>)>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn alter_export<'life0, 'async_trait>(
        &'life0 mut self,
        id: GlobalId,
        export: ExportDescription<Self::Timestamp>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn alter_export_connections<'life0, 'async_trait>(
        &'life0 mut self,
        exports: BTreeMap<GlobalId, StorageSinkConnection>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn drop_tables(
        &mut self,
        identifiers: Vec<GlobalId>,
        ts: Self::Timestamp
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn drop_sources(
        &mut self,
        storage_metadata: &StorageMetadata,
        identifiers: Vec<GlobalId>
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn drop_sinks(
        &mut self,
        identifiers: Vec<GlobalId>
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn drop_sinks_unvalidated(&mut self, identifiers: Vec<GlobalId>);
    fn drop_sources_unvalidated(
        &mut self,
        storage_metadata: &StorageMetadata,
        identifiers: Vec<GlobalId>
    ) -> Result<(), StorageError<Self::Timestamp>>;
    fn append_table(
        &mut self,
        write_ts: Self::Timestamp,
        advance_to: Self::Timestamp,
        commands: Vec<(GlobalId, Vec<TimestamplessUpdate>)>
    ) -> Result<Receiver<Result<(), StorageError<Self::Timestamp>>>, StorageError<Self::Timestamp>>;
    fn monotonic_appender(
        &self,
        id: GlobalId
    ) -> Result<MonotonicAppender<Self::Timestamp>, StorageError<Self::Timestamp>>;
    fn webhook_statistics(
        &self,
        id: GlobalId
    ) -> Result<Arc<WebhookStatistics>, StorageError<Self::Timestamp>>;
    fn snapshot<'life0, 'async_trait>(
        &'life0 mut self,
        id: GlobalId,
        as_of: Self::Timestamp
    ) -> Pin<Box<dyn Future<Output = Result<Vec<(Row, Diff)>, StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn snapshot_cursor<'life0, 'async_trait>(
        &'life0 mut self,
        id: GlobalId,
        as_of: Self::Timestamp
    ) -> Pin<Box<dyn Future<Output = Result<SnapshotCursor<Self::Timestamp>, StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self::Timestamp: Codec64 + Timestamp + Lattice,
             Self: 'async_trait,
             'life0: 'async_trait;
    fn snapshot_stats<'life0, 'async_trait>(
        &'life0 self,
        id: GlobalId,
        as_of: Antichain<Self::Timestamp>
    ) -> Pin<Box<dyn Future<Output = Result<SnapshotStats, StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn snapshot_parts_stats<'life0, 'async_trait>(
        &'life0 self,
        id: GlobalId,
        as_of: Antichain<Self::Timestamp>
    ) -> Pin<Box<dyn Future<Output = BoxFuture<Result<SnapshotPartsStats, StorageError<Self::Timestamp>>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn set_read_policy(
        &mut self,
        policies: Vec<(GlobalId, ReadPolicy<Self::Timestamp>)>
    );
    fn acquire_read_holds(
        &mut self,
        desired_holds: Vec<GlobalId>
    ) -> Result<Vec<ReadHold<Self::Timestamp>>, ReadHoldError>;
    fn update_read_capabilities(
        &mut self,
        updates: &mut BTreeMap<GlobalId, ChangeBatch<Self::Timestamp>>
    );
    fn ready<'life0, 'async_trait>(
        &'life0 mut self
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn process<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        storage_metadata: &'life1 StorageMetadata
    ) -> Pin<Box<dyn Future<Output = Result<Option<Response<Self::Timestamp>>, Error>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn inspect_persist_state<'life0, 'async_trait>(
        &'life0 self,
        id: GlobalId
    ) -> Pin<Box<dyn Future<Output = Result<Value, Error>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn record_frontiers<'life0, 'async_trait>(
        &'life0 mut self,
        external_frontiers: BTreeMap<GlobalId, (Antichain<Self::Timestamp>, Antichain<Self::Timestamp>)>
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn record_replica_frontiers<'life0, 'async_trait>(
        &'life0 mut self,
        external_frontiers: BTreeMap<(GlobalId, ReplicaId), Antichain<Self::Timestamp>>
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn append_introspection_updates<'life0, 'async_trait>(
        &'life0 mut self,
        type_: IntrospectionType,
        updates: Vec<(Row, Diff)>
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn update_introspection_collection<'life0, 'async_trait>(
        &'life0 mut self,
        type_: IntrospectionType,
        op: StorageWriteOp
    ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn initialize_state<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        txn: &'life1 mut (dyn StorageTxn<Self::Timestamp> + Send),
        init_ids: BTreeSet<GlobalId>,
        drop_ids: BTreeSet<GlobalId>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn prepare_state<'life0, 'life1, 'async_trait>(
        &'life0 self,
        txn: &'life1 mut (dyn StorageTxn<Self::Timestamp> + Send),
        ids_to_add: BTreeSet<GlobalId>,
        ids_to_drop: BTreeSet<GlobalId>
    ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn real_time_recent_timestamp<'life0, 'async_trait>(
        &'life0 mut self,
        source_ids: BTreeSet<GlobalId>,
        timeout: Duration
    ) -> Pin<Box<dyn Future<Output = Result<BoxFuture<Result<Self::Timestamp, StorageError<Self::Timestamp>>>, StorageError<Self::Timestamp>>> + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided method
    fn acquire_read_hold(
        &mut self,
        id: GlobalId
    ) -> Result<ReadHold<Self::Timestamp>, ReadHoldError> { ... }
}

Required Associated Types

type Timestamp: TimelyTimestamp

Required Methods

fn initialization_complete(&mut self)

Marks the end of any initialization commands.

The implementor may wait for this method to be called before implementing prior commands, and so it is important for a user to invoke this method as soon as it is comfortable. This method can be invoked immediately, at the potential expense of performance.

fn allow_writes<'life0, 'async_trait>( &'life0 mut self, register_ts: Option<Self::Timestamp> ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Allow this controller and instances controlled by it to write to external systems.

If the controller has previously been told about tables (via StorageController::create_collections), the caller must provide a register_ts, the timestamp at which any tables that are known to the controller should be registered in the txn system.

Panics

Panics when the controller knows about tables but no register_ts is provided.

fn update_parameters(&mut self, config_params: StorageParameters)

Update storage configuration with new parameters.

fn config(&self) -> &StorageConfiguration

Get the current configuration, including parameters updated with update_parameters.

fn collection_metadata( &self, id: GlobalId ) -> Result<CollectionMetadata, StorageError<Self::Timestamp>>

Returns the CollectionMetadata of the collection identified by id.

fn collection_frontiers( &self, id: GlobalId ) -> Result<(Antichain<Self::Timestamp>, Antichain<Self::Timestamp>), StorageError<Self::Timestamp>>

Returns the since/upper frontiers of the identified collection.

fn collections_frontiers( &self, id: Vec<GlobalId> ) -> Result<Vec<(GlobalId, Antichain<Self::Timestamp>, Antichain<Self::Timestamp>)>, StorageError<Self::Timestamp>>

Returns the since/upper frontiers of the identified collections.

Having a method that returns both frontiers at the same time, for all requested collections, ensures that we can get a consistent “snapshot” of collection state. If we had separate methods instead, and/or would allow getting frontiers for collections one at a time, it could happen that collection state changes concurrently, while information is gathered.

fn active_collection_metadatas(&self) -> Vec<(GlobalId, CollectionMetadata)>

Acquire an iterator over CollectionMetadata for all active collections.

A collection is “active” when it has a non empty frontier of read capabilties.

fn check_exists( &self, id: GlobalId ) -> Result<(), StorageError<Self::Timestamp>>

Checks whether a collection exists under the given GlobalId. Returns an error if the collection does not exist.

fn create_instance(&mut self, id: StorageInstanceId)

Creates a storage instance with the specified ID.

A storage instance can have zero or one replicas. The instance is created with zero replicas.

Panics if a storage instance with the given ID already exists.

fn drop_instance(&mut self, id: StorageInstanceId)

Drops the storage instance with the given ID.

If you call this method while the storage instance has a replica attached, that replica will be leaked. Call drop_replica first.

Panics if a storage instance with the given ID does not exist.

fn connect_replica( &mut self, instance_id: StorageInstanceId, replica_id: ReplicaId, location: ClusterReplicaLocation )

Connects the storage instance to the specified replica.

If the storage instance is already attached to a replica, communication with that replica is severed in favor of the new replica.

In the future, this API will be adjusted to support active replication of storage instances (i.e., multiple replicas attached to a given storage instance).

fn drop_replica( &mut self, instance_id: StorageInstanceId, replica_id: ReplicaId )

Disconnects the storage instance from the specified replica.

fn create_collections<'life0, 'life1, 'async_trait>( &'life0 mut self, storage_metadata: &'life1 StorageMetadata, register_ts: Option<Self::Timestamp>, collections: Vec<(GlobalId, CollectionDescription<Self::Timestamp>)> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Create the sources described in the individual RunIngestionCommand commands.

Each command carries the source id, the source description, and any associated metadata needed to ingest the particular source.

This command installs collection state for the indicated sources, and the are now valid to use in queries at times beyond the initial since frontiers. Each collection also acquires a read capability at this frontier, which will need to be repeatedly downgraded with allow_compaction() to permit compaction.

This method is NOT idempotent; It can fail between processing of different collections and leave the controller in an inconsistent state. It is almost always wrong to do anything but abort the process on Err.

The register_ts is used as the initial timestamp that tables are available for reads. (We might later give non-tables the same treatment, but hold off on that initially.) Callers must provide a Some if any of the collections is a table. A None may be given if none of the collections are a table (i.e. all materialized views, sources, etc).

fn check_alter_ingestion_source_desc( &mut self, ingestion_id: GlobalId, source_desc: &SourceDesc ) -> Result<(), StorageError<Self::Timestamp>>

Check that the ingestion associated with id can use the provided SourceDesc.

Note that this check is optimistic and its return of Ok(()) does not guarantee that subsequent calls to alter_ingestion_source_desc are guaranteed to succeed.

fn alter_ingestion_source_desc<'life0, 'async_trait>( &'life0 mut self, ingestion_id: GlobalId, source_desc: SourceDesc ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Alters the identified collection to use the provided SourceDesc.

fn alter_ingestion_connections<'life0, 'async_trait>( &'life0 mut self, source_connections: BTreeMap<GlobalId, GenericSourceConnection<InlinedConnection>> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Alters each identified collection to use the correlated GenericSourceConnection.

fn export( &self, id: GlobalId ) -> Result<&ExportState<Self::Timestamp>, StorageError<Self::Timestamp>>

Acquire an immutable reference to the export state, should it exist.

fn export_mut( &mut self, id: GlobalId ) -> Result<&mut ExportState<Self::Timestamp>, StorageError<Self::Timestamp>>

Acquire a mutable reference to the export state, should it exist.

fn create_exports<'life0, 'async_trait>( &'life0 mut self, exports: Vec<(GlobalId, ExportDescription<Self::Timestamp>)> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Create the sinks described by the ExportDescription.

fn alter_export<'life0, 'async_trait>( &'life0 mut self, id: GlobalId, export: ExportDescription<Self::Timestamp> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Alter the sink identified by the given id to match the provided ExportDescription.

fn alter_export_connections<'life0, 'async_trait>( &'life0 mut self, exports: BTreeMap<GlobalId, StorageSinkConnection> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

For each identified export, alter its StorageSinkConnection.

fn drop_tables( &mut self, identifiers: Vec<GlobalId>, ts: Self::Timestamp ) -> Result<(), StorageError<Self::Timestamp>>

Drops the read capability for the tables and allows their resources to be reclaimed.

fn drop_sources( &mut self, storage_metadata: &StorageMetadata, identifiers: Vec<GlobalId> ) -> Result<(), StorageError<Self::Timestamp>>

Drops the read capability for the sources and allows their resources to be reclaimed.

fn drop_sinks( &mut self, identifiers: Vec<GlobalId> ) -> Result<(), StorageError<Self::Timestamp>>

Drops the read capability for the sinks and allows their resources to be reclaimed.

fn drop_sinks_unvalidated(&mut self, identifiers: Vec<GlobalId>)

Drops the read capability for the sinks and allows their resources to be reclaimed.

TODO(jkosh44): This method does not validate the provided identifiers. Currently when the controller starts/restarts it has no durable state. That means that it has no way of remembering any past commands sent. In the future we plan on persisting state for the controller so that it is aware of past commands. Therefore this method is for dropping sinks that we know to have been previously created, but have been forgotten by the controller due to a restart. Once command history becomes durable we can remove this method and use the normal drop_sinks.

fn drop_sources_unvalidated( &mut self, storage_metadata: &StorageMetadata, identifiers: Vec<GlobalId> ) -> Result<(), StorageError<Self::Timestamp>>

Drops the read capability for the sources and allows their resources to be reclaimed.

TODO(jkosh44): This method does not validate the provided identifiers. Currently when the controller starts/restarts it has no durable state. That means that it has no way of remembering any past commands sent. In the future we plan on persisting state for the controller so that it is aware of past commands. Therefore this method is for dropping sources that we know to have been previously created, but have been forgotten by the controller due to a restart. Once command history becomes durable we can remove this method and use the normal drop_sources.

fn append_table( &mut self, write_ts: Self::Timestamp, advance_to: Self::Timestamp, commands: Vec<(GlobalId, Vec<TimestamplessUpdate>)> ) -> Result<Receiver<Result<(), StorageError<Self::Timestamp>>>, StorageError<Self::Timestamp>>

Append updates into the local input named id and advance its upper to upper.

The method returns a oneshot that can be awaited to indicate completion of the write. The method may return an error, indicating an immediately visible error, and also the oneshot may return an error if one is encountered during the write.

fn monotonic_appender( &self, id: GlobalId ) -> Result<MonotonicAppender<Self::Timestamp>, StorageError<Self::Timestamp>>

Returns a MonotonicAppender which is a channel that can be used to monotonically append to the specified GlobalId.

fn webhook_statistics( &self, id: GlobalId ) -> Result<Arc<WebhookStatistics>, StorageError<Self::Timestamp>>

Returns a shared WebhookStatistics which can be used to report user-facing statistics for this given webhhook, specified by the GlobalId.

fn snapshot<'life0, 'async_trait>( &'life0 mut self, id: GlobalId, as_of: Self::Timestamp ) -> Pin<Box<dyn Future<Output = Result<Vec<(Row, Diff)>, StorageError<Self::Timestamp>>> + 'async_trait>>

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

Returns the snapshot of the contents of the local input named id at as_of.

fn snapshot_cursor<'life0, 'async_trait>( &'life0 mut self, id: GlobalId, as_of: Self::Timestamp ) -> Pin<Box<dyn Future<Output = Result<SnapshotCursor<Self::Timestamp>, StorageError<Self::Timestamp>>> + 'async_trait>>

where Self::Timestamp: Codec64 + Timestamp + Lattice, Self: 'async_trait, 'life0: 'async_trait,

Returns the snapshot of the contents of the local input named id at as_of.

fn snapshot_stats<'life0, 'async_trait>( &'life0 self, id: GlobalId, as_of: Antichain<Self::Timestamp> ) -> Pin<Box<dyn Future<Output = Result<SnapshotStats, StorageError<Self::Timestamp>>> + 'async_trait>>

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

Returns aggregate statistics about the contents of the local input named id at as_of.

fn snapshot_parts_stats<'life0, 'async_trait>( &'life0 self, id: GlobalId, as_of: Antichain<Self::Timestamp> ) -> Pin<Box<dyn Future<Output = BoxFuture<Result<SnapshotPartsStats, StorageError<Self::Timestamp>>>> + 'async_trait>>

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

Returns aggregate statistics about the contents of the local input named id at as_of.

Note that this async function itself returns a future. We may need to block on the stats being available, but don’t want to hold a reference to the controller for too long… so the outer future holds a reference to the controller but returns quickly, and the inner future is slow but does not reference the controller.

fn set_read_policy( &mut self, policies: Vec<(GlobalId, ReadPolicy<Self::Timestamp>)> )

Assigns a read policy to specific identifiers.

The policies are assigned in the order presented, and repeated identifiers should conclude with the last policy. Changing a policy will immediately downgrade the read capability if appropriate, but it will not “recover” the read capability if the prior capability is already ahead of it.

The StorageController may include its own overrides on these policies.

Identifiers not present in policies retain their existing read policies.

fn acquire_read_holds( &mut self, desired_holds: Vec<GlobalId> ) -> Result<Vec<ReadHold<Self::Timestamp>>, ReadHoldError>

Acquires and returns the desired read holds, advancing them to the since frontier when necessary.

fn update_read_capabilities( &mut self, updates: &mut BTreeMap<GlobalId, ChangeBatch<Self::Timestamp>> )

Applies updates and sends any appropriate compaction command.

fn ready<'life0, 'async_trait>( &'life0 mut self ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Waits until the controller is ready to process a response.

This method may block for an arbitrarily long time.

When the method returns, the owner should call StorageController::process to process the ready message.

This method is cancellation safe.

fn process<'life0, 'life1, 'async_trait>( &'life0 mut self, storage_metadata: &'life1 StorageMetadata ) -> Pin<Box<dyn Future<Output = Result<Option<Response<Self::Timestamp>>, Error>> + 'async_trait>>

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

Processes the work queued by StorageController::ready.

This method is guaranteed to return “quickly” unless doing so would compromise the correctness of the system.

This method is not guaranteed to be cancellation safe. It must be awaited to completion.

fn inspect_persist_state<'life0, 'async_trait>( &'life0 self, id: GlobalId ) -> Pin<Box<dyn Future<Output = Result<Value, Error>> + 'async_trait>>

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

Exposes the internal state of the data shard for debugging and QA.

We’ll be thoughtful about making unnecessary changes, but the output of this method needs to be gated from users, so that it’s not subject to our backward compatibility guarantees.

TODO: Ideally this would return impl Serialize so the caller can do with it what they like, but that doesn’t work in traits yet. The workaround (an associated type) doesn’t work because persist doesn’t want to make the type public. In the meantime, move the serde_json call from the single user into this method.

fn record_frontiers<'life0, 'async_trait>( &'life0 mut self, external_frontiers: BTreeMap<GlobalId, (Antichain<Self::Timestamp>, Antichain<Self::Timestamp>)> ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Records the current read and write frontiers of all known storage objects.

The provided external_frontiers are merged with the frontiers known to the storage controller. If external_frontiers contains entries with object IDs that are known to storage controller, the storage controller’s frontiers take precedence. The rationale is that the storage controller should be the authority on frontiers of storage objects, not the caller of this method.

fn record_replica_frontiers<'life0, 'async_trait>( &'life0 mut self, external_frontiers: BTreeMap<(GlobalId, ReplicaId), Antichain<Self::Timestamp>> ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Records the current per-replica write frontiers of all known storage objects.

The provided external_frontiers are merged with the frontiers known to the storage controller. If external_frontiers contains entries with object IDs that are known to storage controller, the storage controller’s frontiers take precedence. The rationale is that the storage controller should be the authority on frontiers of storage objects, not the caller of this method.

fn append_introspection_updates<'life0, 'async_trait>( &'life0 mut self, type_: IntrospectionType, updates: Vec<(Row, Diff)> ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Records append-only updates for the given introspection type.

Rows passed in updates MUST have the correct schema for the given introspection type, as readers rely on this and might panic otherwise.

fn update_introspection_collection<'life0, 'async_trait>( &'life0 mut self, type_: IntrospectionType, op: StorageWriteOp ) -> Pin<Box<dyn Future<Output = ()> + 'async_trait>>

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

Updates the desired state of the given introspection type.

Rows passed in op MUST have the correct schema for the given introspection type, as readers rely on this and might panic otherwise.

fn initialize_state<'life0, 'life1, 'async_trait>( &'life0 mut self, txn: &'life1 mut (dyn StorageTxn<Self::Timestamp> + Send), init_ids: BTreeSet<GlobalId>, drop_ids: BTreeSet<GlobalId> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

On boot, seed the controller’s metadata/state.

fn prepare_state<'life0, 'life1, 'async_trait>( &'life0 self, txn: &'life1 mut (dyn StorageTxn<Self::Timestamp> + Send), ids_to_add: BTreeSet<GlobalId>, ids_to_drop: BTreeSet<GlobalId> ) -> Pin<Box<dyn Future<Output = Result<(), StorageError<Self::Timestamp>>> + 'async_trait>>

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

Update the implementor of StorageTxn with the appropriate metadata given the IDs to add and drop.

The data modified in the StorageTxn must be made available in all subsequent calls that require StorageMetadata as a parameter.

fn real_time_recent_timestamp<'life0, 'async_trait>( &'life0 mut self, source_ids: BTreeSet<GlobalId>, timeout: Duration ) -> Pin<Box<dyn Future<Output = Result<BoxFuture<Result<Self::Timestamp, StorageError<Self::Timestamp>>>, StorageError<Self::Timestamp>>> + 'async_trait>>

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

Provided Methods

fn acquire_read_hold( &mut self, id: GlobalId ) -> Result<ReadHold<Self::Timestamp>, ReadHoldError>

Acquires and returns the earliest legal read hold.

Implementors