com.digitalasset.canton.participant.protocol.submission
WatermarkTracker
Companion object WatermarkTracker
class WatermarkTracker[Mark] extends WatermarkLookup[Mark] with NamedLogging
Keeps track of a boundary WatermarkTracker.highWatermark that increases monotonically. Clients can do one of the following:
- Use the WatermarkTracker to execute a task associated with a given mark
mark> WatermarkTracker.highWatermark. Ifmark<= WatermarkTracker.highWatermark, the task will be rejected. - Use the tracker to increase the WatermarkTracker.highWatermark.
Notify the caller as soon as all tasks with
mark<= WatermarkTracker.highWatermark have finished.
The WatermarkTracker is effectively used to enforce mutual exclusion between two types of tasks.
- Tasks of type 1 act on data with
mark> WatermarkTracker.highWatermark. - Tasks of type 2 act on data with
mark<= WatermarkTracker.highWatermark.
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- new WatermarkTracker(initialWatermark: Mark, loggerFactory: NamedLoggerFactory)(implicit arg0: Pretty[Mark], ordering: Ordering[Mark])
- initialWatermark
The initial value for WatermarkTracker.highWatermark
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- def highWatermark: Mark
Returns the current value of the watermark.
Returns the current value of the watermark.
- Definition Classes
- WatermarkTracker → WatermarkLookup
- def increaseWatermark(mark: Mark): Future[Unit]
Increases the highWatermark to
markunless it was higher previously.Increases the highWatermark to
markunless it was higher previously.- returns
The future completes after there are no running tasks with marks up to
markinclusive.
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- def logger: TracedLogger
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- val loggerFactory: NamedLoggerFactory
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- WatermarkTracker → NamedLogging
- implicit def loggingContext(implicit traceContext: TraceContext): ErrorLoggingContext
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- def noTracingLogger: Logger
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- def runIfAboveWatermark[F[_], Context[_], A](mark: Mark, register: => F[A])(implicit ec: ExecutionContext, traceContext: TraceContext, F: Thereafter[F, Context]): Either[MarkTooLow[Mark], F[A]]
Run a task
taskifmark> highWatermark.Run a task
taskifmark> highWatermark.- returns
scala.Left$ if
markis not higher than highWatermark. Otherwise returns the result of runningtaskas scala.Right$.
- Exceptions thrown
java.lang.IllegalStateExceptionif there are alreadyInt.MaxValuetasks running formark
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