class TaskScheduler[Task <: TimedTask] extends NamedLogging with FlagCloseable with HasCloseContext
The task scheduler manages tasks with associated timestamps and sequencer counters. Tasks may be inserted in any order; they will be executed nevertheless in the correct order given by the timestamps.
The tasks execute sequentially in scala.concurrent.Future.
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- TaskScheduler
- HasCloseContext
- PromiseUnlessShutdownFactory
- FlagCloseable
- PerformUnlessClosing
- HasSynchronizeWithReaders
- HasSynchronizeWithClosing
- OnShutdownRunner
- HasRunOnClosing
- HasUnlessClosing
- AutoCloseable
- NamedLogging
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Instance Constructors
- new TaskScheduler(initSc: SequencerCounter, initTimestamp: CantonTimestamp, alertAfter: Duration, alertEvery: Duration, equalTimestampTaskOrdering: Ordering[Task], metrics: TaskSchedulerMetrics, exitOnFatalFailures: Boolean, timeouts: ProcessingTimeout, loggerFactory: NamedLoggerFactory, futureSupervisor: FutureSupervisor, clock: Clock)(implicit executionContext: ExecutionContext)
- initSc
The first sequencer counter to be processed
- initTimestamp
Only timestamps after this timestamp can be used for scheduling tasks and for adding ticks. This timestamp will be the timestamp for immediate tasks initially.
- equalTimestampTaskOrdering
The ordering for tasks with the same timestamps; tasks that are smaller w.r.t this order are processed earlier.
Value Members
- final def !=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def ##: Int
- Definition Classes
- AnyRef → Any
- final def ==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- def addReader(reader: String)(implicit traceContext: TraceContext): UnlessShutdown[ReaderHandle]
TODO(#16601) Make this method private once PerformUnlessClosing doesn't need it any more
TODO(#16601) Make this method private once PerformUnlessClosing doesn't need it any more
- Attributes
- protected[this]
- Definition Classes
- HasSynchronizeWithReaders
- def addTick(sequencerCounter: SequencerCounter, timestamp: CantonTimestamp)(implicit traceContext: TraceContext): Unit
Signals that the sequencer counter with the given timestamp has been observed.
Signals that the sequencer counter with the given timestamp has been observed.
Eventually, all sequencer counters above and equal to
initScmust be added with their timestamp using this method. Every sequencer counter must be added once and timestamps must strictly increase with sequencer counters.If all sequencer counters between
initScandsequencerCounterhave been added, then the tasks up totimestampwill be performed, unless there is a task that could not complete. In that case, task processing stops with the unfinished task.- Exceptions thrown
- If the
sequencerCounterhas not been inserted, but all sequencer counters up totimestamphave been inserted. - If the
sequencerCounteris the first sequencer counter to be processed and thetimestampis not after the timestamp given to the constructor. - If the
sequencerCounterhas been inserted with a different timestamp. - If the
timestampis at most the timestamp of a smaller sequencer counter, or if thetimestampis at least the timestamp of a larger sequencer counter. - If the
sequencerCounterisLong.MaxValue.
- If the
- See also
TaskScheduler.runTasks()
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
- final def close(): Unit
Blocks until all earlier tasks have completed and then prevents further tasks from being run.
Blocks until all earlier tasks have completed and then prevents further tasks from being run.
- Definition Classes
- FlagCloseable → OnShutdownRunner → AutoCloseable
- implicit val closeContext: CloseContext
- Definition Classes
- HasCloseContext
- def closingTimeout: FiniteDuration
- Attributes
- protected
- Definition Classes
- FlagCloseable → PerformUnlessClosing
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef → Any
- implicit def errorLoggingContext(implicit traceContext: TraceContext): ErrorLoggingContext
- Attributes
- protected
- Definition Classes
- NamedLogging
- def flush(): Future[Unit]
The returned future completes after all tasks that can be currently performed have completed.
The returned future completes after all tasks that can be currently performed have completed. Never fails.
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @IntrinsicCandidate() @native()
- def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @IntrinsicCandidate() @native()
- def isClosing: Boolean
Check whether we're closing.
Check whether we're closing. Susceptible to race conditions; unless you're using this as a flag to the retry lib or you really know what you're doing, prefer
performUnlessClosingand friends.- Definition Classes
- OnShutdownRunner → HasUnlessClosing
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def keepTrackOfReaderCallStack: Boolean
Set this to true to get detailed information about all futures that did not complete during shutdown.
Set this to true to get detailed information about all futures that did not complete during shutdown.
- Attributes
- protected[this]
- Definition Classes
- PerformUnlessClosing → HasSynchronizeWithReaders
- def logger: TracedLogger
- Attributes
- protected
- Definition Classes
- NamedLogging
- val loggerFactory: NamedLoggerFactory
- Attributes
- protected
- Definition Classes
- TaskScheduler → NamedLogging
- def mkPromise[A](description: String, futureSupervisor: FutureSupervisor, logAfter: Duration = 10.seconds, logLevel: Level = Level.DEBUG)(implicit elc: ErrorLoggingContext): PromiseUnlessShutdown[A]
Use this method to create a PromiseUnlessShutdown that will automatically be cancelled when the close context is closed.
Use this method to create a PromiseUnlessShutdown that will automatically be cancelled when the close context is closed. This allows proper clean up of stray promises when the node is transitioning to a passive state.
Note: you should *not* invoke
successon the returned promise but rather usetrySuccess. The reason is that the call tosuccessmay fail in case of shutdown.- Definition Classes
- PromiseUnlessShutdownFactory
- def nameInternal: String
- Attributes
- protected[this]
- Definition Classes
- PerformUnlessClosing → HasSynchronizeWithReaders
- implicit def namedLoggingContext(implicit traceContext: TraceContext): NamedLoggingContext
- Attributes
- protected
- Definition Classes
- NamedLogging
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def noTracingLogger: Logger
- Attributes
- protected
- Definition Classes
- NamedLogging
- final def notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @IntrinsicCandidate() @native()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @IntrinsicCandidate() @native()
- def onCloseFailure(e: Throwable): Unit
- Attributes
- protected
- Definition Classes
- PerformUnlessClosing
- def onClosed(): Unit
- Definition Classes
- TaskScheduler → PerformUnlessClosing
- final def onFirstClose(): Unit
Blocks until all earlier tasks have completed and then prevents further tasks from being run.
Blocks until all earlier tasks have completed and then prevents further tasks from being run.
- Definition Classes
- PerformUnlessClosing → OnShutdownRunner
- def readSequencerCounterQueue: (SequencerCounter) => AssociatedValue[CantonTimestamp]
Used to inspect the state of the sequencerCounterQueue, for testing purposes.
Used to inspect the state of the sequencerCounterQueue, for testing purposes.
- Annotations
- @VisibleForTesting()
- def remainingReaders(): Seq[String]
- Attributes
- protected[this]
- Definition Classes
- HasSynchronizeWithReaders
- def removeReader(handle: ReaderHandle): Unit
TODO(#16601) Make this method private once PerformUnlessClosing doesn't need it any more
TODO(#16601) Make this method private once PerformUnlessClosing doesn't need it any more
- Attributes
- protected[this]
- Definition Classes
- HasSynchronizeWithReaders
- def runOnClose(task: RunOnClosing): UnlessShutdown[LifeCycleRegistrationHandle]
Schedules the given task to be run upon closing.
Schedules the given task to be run upon closing.
- returns
An com.digitalasset.canton.lifecycle.UnlessShutdown.Outcome indicates that the task will have been run when the
LifeCycleManager'scloseAsyncmethod completes or whenAutoCloseable'sclosemethod returns, unless the returnedLifeCycleRegistrationHandlewas used to cancel the task or the task has been done beforehand. com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if the task is not run due to closing. This always happens if isClosing returns true.
- Definition Classes
- OnShutdownRunner → HasRunOnClosing
- def runOnOrAfterClose(task: RunOnClosing)(implicit traceContext: TraceContext): LifeCycleRegistrationHandle
Register a task to run when closing is initiated, or run it immediately if closing is already ongoing.
Register a task to run when closing is initiated, or run it immediately if closing is already ongoing. Unlike runOnClose, this method does not guarantee that this task will have run by the time the
LifeCycleManager'scloseAsyncmethod completes orAutoCloseable'sclosereturns. This is because the task is run immediately if the component has already been closed.- Definition Classes
- HasRunOnClosing
- final def runOnOrAfterClose_(task: RunOnClosing)(implicit traceContext: TraceContext): Unit
Variant of runOnOrAfterClose that does not return a com.digitalasset.canton.lifecycle.LifeCycleRegistrationHandle.
Variant of runOnOrAfterClose that does not return a com.digitalasset.canton.lifecycle.LifeCycleRegistrationHandle.
- Definition Classes
- HasRunOnClosing
- def runTaskUnlessDone(task: RunOnClosing)(implicit traceContext: TraceContext): Unit
- Attributes
- protected[this]
- Definition Classes
- OnShutdownRunner → HasRunOnClosing
- def scheduleBarrierUS(timestamp: CantonTimestamp)(implicit traceContext: TraceContext): Option[FutureUnlessShutdown[Unit]]
Schedules a new barrier at the given timestamp.
Schedules a new barrier at the given timestamp.
- returns
A future that completes when all sequencer counters up to the given timestamp have been signalled. scala.None$ if all sequencer counters up to the given timestamp have already been signalled.
- def scheduleTask(task: Task): Unit
Adds a new task to be executed at the given timestamp and with the associated sequencer counter.
Adds a new task to be executed at the given timestamp and with the associated sequencer counter. This method does not register the timestamp as being observed. So addTick must be called separately if desired.
- task
The task to execute.
- Exceptions thrown
java.lang.IllegalArgumentExceptionif thetimestamporsequencer counterof the task is earlier than to where the task scheduler has already progressed
- def scheduleTaskIfLater[T <: Task](desiredTimestamp: CantonTimestamp, taskFactory: (CantonTimestamp) => T): Either[CantonTimestamp, T]
Schedule task only, if the desired timestamp is after the current latest polled timestamp.
Schedule task only, if the desired timestamp is after the current latest polled timestamp.
- taskFactory
The function creating a task from the desired timestamp. This function will immediately execute, and the resulting task will be scheduled to the queue
- returns
A Left with the latest timestamp, if it is after the desired timestamp, or a Right with the created Task itself.
- def scheduleTaskImmediately(taskFactory: (CantonTimestamp) => FutureUnlessShutdown[Unit], taskTraceContext: TraceContext): CantonTimestamp
Scheduling a task immediately.
Scheduling a task immediately. This does not mean it will be executed immediately: all preceding tasks will finish executing first.
- taskFactory
The function which will return the async result at execution. The input will be the realized timestamp.
- returns
The realized timestamp.
- def synchronizeWithClosing[F[_], A](name: String)(f: => F[A])(implicit traceContext: TraceContext, F: Thereafter[F], A: CanAbortDueToShutdown[F]): F[A]
Runs the computation
fonly if the component is not yet closing.Runs the computation
fonly if the component is not yet closing. If so, the component will delay releasing its resources untilfhas completed (as defined by the com.digitalasset.canton.util.Thereafter instance) or thesynchronizeWithClosingPatiencehas elapsed.DO NOT CALL
this.closeas part off, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, insidef.- returns
The computation completes with com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if
fhas not run. Otherwise it is the result of runningf.
- Definition Classes
- HasSynchronizeWithClosing
- See also
HasRunOnClosing.isClosing
- def synchronizeWithClosingF[A](name: String)(f: => Future[A])(implicit ec: ExecutionContext, traceContext: TraceContext): FutureUnlessShutdown[A]
Convenience method for synchronizing on
Futures instead ofFutureUnlessShutdowns.Convenience method for synchronizing on
Futures instead ofFutureUnlessShutdowns. Equivalent tosynchronizeWithClosing(name)(FutureUnlessShutdown.outcomeF(f))
- Definition Classes
- PerformUnlessClosing
- def synchronizeWithClosingPatience: FiniteDuration
- Attributes
- protected[this]
- Definition Classes
- PerformUnlessClosing → HasSynchronizeWithReaders
- def synchronizeWithClosingSync[A](name: String)(f: => A)(implicit traceContext: TraceContext): UnlessShutdown[A]
Runs the computation
fonly if the component is not yet closing.Runs the computation
fonly if the component is not yet closing. If so, the component will delay releasing its resources untilfhas finished or thesynchronizeWithClosingPatiencehas elapsed.DO NOT CALL
this.closeas part off, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, insidef.- returns
com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if
fhas not run.
- Definition Classes
- HasSynchronizeWithClosing
- Annotations
- @SuppressWarnings()
- See also
HasRunOnClosing.isClosing
- def synchronizeWithClosingUS[F[_], A](name: String)(f: => F[A])(implicit traceContext: TraceContext, F: Thereafter[F]): UnlessShutdown[F[A]]
Runs the computation
fonly if the component is not yet closing.Runs the computation
fonly if the component is not yet closing. If so, the component will delay releasing its resources untilfhas completed (as defined by the com.digitalasset.canton.util.Thereafter instance) or thesynchronizeWithClosingPatiencehas elapsed.DO NOT CALL
this.closeas part off, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, insidef.- returns
com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if
fhas not run. Otherwise the result of runningf.
- Definition Classes
- PerformUnlessClosing → HasSynchronizeWithClosing
- See also
HasRunOnClosing.isClosing
- def synchronizeWithReaders()(implicit traceContext: TraceContext): Boolean
- Attributes
- protected[this]
- Definition Classes
- HasSynchronizeWithReaders
- final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
- val timeouts: ProcessingTimeout
- Attributes
- protected
- Definition Classes
- TaskScheduler → FlagCloseable
- def toString(): String
- Definition Classes
- AnyRef → Any
- final def unlessClosing[F[_], A](fa: => F[A])(implicit F: CanAbortDueToShutdown[F]): F[A]
Runs the computation
faunless isClosing returns true.Runs the computation
faunless isClosing returns true.This method does not delay the closing while
fais running, unlike the methods inHasSynchronizeWithClosing. Accordingly, this method is useful for intermittent checks whether the result of the computation is still relevant.- returns
The result of
faor com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if isClosing is true
- Definition Classes
- HasUnlessClosing
- Annotations
- @inline()
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- def withReader[F[_], A](name: String)(f: => F[A])(implicit traceContext: TraceContext, F: Thereafter[F]): UnlessShutdown[F[A]]
- Attributes
- protected[this]
- Definition Classes
- HasSynchronizeWithReaders