com.digitalasset.canton.domain.topology
DomainTopologyDispatcher
Companion object DomainTopologyDispatcher
class DomainTopologyDispatcher extends NamedLogging with FlagCloseable with DomainIdentityStateObserver
Class that dispatches topology transactions added to the domain topology manager to the members
When topology transactions are added to a domain, the dispatcher sends them to the respective members. Same is true if a participant joins a domain, the dispatcher will send him the current snapshot of topology transactions.
The dispatcher is very simple: - [source] as the source topology transaction store of the domain topology manager - [target] as the target topology transaction store of the domain client - [queue] as the difference of the stores [source] - [target]
Now, the dispatcher takes x :: rest from [queue], sends x over the sequencer and monitors the [target] list. Once x is observed, we repeat.
The only special thing in here is the case when x = ParticipantState update. Because in this case, a participant might change his state (i.e. become online for the first time or resume operation after being disabled).
In this case, before x is sent from [source] to [target], we send all transactions in [target] to him. And once we did that, we follow-up with x.
Given that we want that all members have the same [target] store, we send the x not to one member, but to all addressable members in a batch.
One final remark: the present code will properly resume from a crash, except that it might send a snapshot to a participant a second time. I.e. it assumes idempotency of the topology transaction message processing.
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Instance Constructors
- new DomainTopologyDispatcher(domainId: DomainId, authorizedStore: TopologyStore, targetClient: DomainTopologyClientWithInit, initialKeys: Map[KeyOwner, Seq[PublicKey]], targetStore: TopologyStore, crypto: Crypto, clock: Clock, addressSequencerAsDomainMember: Boolean, parameters: DomainNodeParameters, sender: DomainTopologySender, loggerFactory: NamedLoggerFactory)(implicit ec: ExecutionContext)
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- def addedSignedTopologyTransaction(timestamp: CantonTimestamp, transactions: Seq[SignedTopologyTransaction[TopologyChangeOp]])(implicit traceContext: TraceContext): Unit
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- DomainTopologyDispatcher → DomainIdentityStateObserver
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Blocks until all earlier tasks have completed and then prevents further tasks from being run.
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- def logger: TracedLogger
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- val loggerFactory: NamedLoggerFactory
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Performs the task given by
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Performs the EitherT[Future] given by
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unless a shutdown has been initiated, in which case the provided error is returned instead.Performs the EitherT[Future] given by
etf
unless a shutdown has been initiated, in which case the provided error is returned instead. Bothetf
and the error are lazy;etf
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Performs the Future given by
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unless a shutdown has been initiated.Performs the Future given by
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unless a shutdown has been initiated. The future is lazy and not evaluated during shutdown. The shutdown will only begin afterf
completes, but other tasks may execute concurrently withf
, if started using this function, or one of the other variants (performUnlessClosing and performUnlessClosingEitherT). The tasks are assumed to take less than closingTimeout to complete.- f
The task to perform
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- def willChangeTheParticipantState(participantId: ParticipantId, attributes: ParticipantAttributes): Unit
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