class ResilientSequencerSubscription[HandlerError] extends SequencerSubscription[HandlerError] with NamedLogging with CloseableAtomicHealthComponent with FlagCloseableAsync

Attempts to create a resilient SequencerSubscription for the SequencerClient by creating underlying subscriptions using the com.digitalasset.canton.sequencing.client.transports.SequencerClientTransport and then recreating them if they fail with a reason that is deemed retryable. If a subscription is closed or fails with a reason that is not retryable the failure will be passed upstream from this subscription. We determine whether an error is retryable by calling the supplied SubscriptionErrorRetryPolicy. We also will delay recreating subscriptions by an interval determined by the com.digitalasset.canton.sequencing.client.SubscriptionRetryDelayRule. As we have to know where to restart a subscription from when it is recreated we use a com.digitalasset.canton.sequencing.handlers.EventTimestampCapture handler wrapper to keep track of the last event that was successfully provided by the provided handler, and use this value to restart new subscriptions from. For this subscription ResilientSequencerSubscription.start must be called for the underlying subscriptions to begin.

Linear Supertypes
CloseableAtomicHealthComponent, AtomicHealthComponent, AtomicHealthElement, CloseableHealthComponent, HealthComponent, CloseableHealthQuasiComponent, HealthQuasiComponent, CloseableHealthElement, HealthElement, SequencerSubscription[HandlerError], NamedLogging, FlagCloseableAsync, FlagCloseable, PerformUnlessClosing, HasSynchronizeWithReaders, OnShutdownRunner, HasRunOnClosing, HasUnlessClosing, AutoCloseable, AnyRef, Any
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  2. By Inheritance
Inherited
  1. ResilientSequencerSubscription
  2. CloseableAtomicHealthComponent
  3. AtomicHealthComponent
  4. AtomicHealthElement
  5. CloseableHealthComponent
  6. HealthComponent
  7. CloseableHealthQuasiComponent
  8. HealthQuasiComponent
  9. CloseableHealthElement
  10. HealthElement
  11. SequencerSubscription
  12. NamedLogging
  13. FlagCloseableAsync
  14. FlagCloseable
  15. PerformUnlessClosing
  16. HasSynchronizeWithReaders
  17. OnShutdownRunner
  18. HasRunOnClosing
  19. HasUnlessClosing
  20. AutoCloseable
  21. AnyRef
  22. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new ResilientSequencerSubscription(sequencerId: SequencerId, startingTimestamp: Option[CantonTimestamp], handler: SequencedEventHandler[HandlerError], subscriptionFactory: SequencerSubscriptionFactory[HandlerError], retryDelayRule: SubscriptionRetryDelayRule, maybeExitOnFatalError: (SubscriptionCloseReason[HandlerError]) => Unit, timeouts: ProcessingTimeout, loggerFactory: NamedLoggerFactory)(implicit executionContext: ExecutionContext)

Type Members

  1. type State = ComponentHealthState

    The type of health states exposed by this component

    The type of health states exposed by this component

    Definition Classes
    HealthComponent → HealthQuasiComponent → HealthElement

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. 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
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. final def associatedHasRunOnClosing: FlagCloseable

    The com.digitalasset.canton.lifecycle.HasRunOnClosing associated with this object.

    The com.digitalasset.canton.lifecycle.HasRunOnClosing associated with this object.

    When this com.digitalasset.canton.lifecycle.HasRunOnClosing closes, the health state permanently becomes closingState and all listeners are notified about this.

    Attributes
    protected
    Definition Classes
    CloseableHealthElement → HealthElement
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
  8. 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
  9. def closeAsync(): Seq[AsyncOrSyncCloseable]

    closeAsync asynchronously releases resources held by a future

    closeAsync asynchronously releases resources held by a future

    returns

    an ordered sequence of async and sync closeables with async closeables made up of future and timeout

    Attributes
    protected
    Definition Classes
    ResilientSequencerSubscription → SequencerSubscription → FlagCloseableAsync
  10. val closeReason: Future[SubscriptionCloseReason[HandlerError]]

    Future which is completed when the subscription is closed.

    Future which is completed when the subscription is closed. If the subscription is closed in a healthy state the future will be completed successfully. However if the subscription fails for an unexpected reason at runtime the completion should be failed.

    Definition Classes
    SequencerSubscription
  11. val closeReasonPromise: Promise[SubscriptionCloseReason[HandlerError]]
    Attributes
    protected
    Definition Classes
    SequencerSubscription
  12. def closingState: ComponentHealthState

    The state set when the associatedHasRunOnClosing closes

    The state set when the associatedHasRunOnClosing closes

    Definition Classes
    ResilientSequencerSubscription → HealthComponent → HealthQuasiComponent → HealthElement
  13. def closingTimeout: FiniteDuration
    Attributes
    protected
    Definition Classes
    FlagCloseable → PerformUnlessClosing
  14. def degradationOccurred(error: String)(implicit tc: TraceContext): Unit

    Report that the component is now degraded.

    Report that the component is now degraded. Note that this will override the component state, even if it is currently failed!

    Definition Classes
    AtomicHealthComponent
  15. def degradationOccurred(error: RpcError)(implicit tc: TraceContext): Unit

    Report that the component is now degraded.

    Report that the component is now degraded. Note that this will override the component state, even if it is currently failed!

    Definition Classes
    AtomicHealthComponent
  16. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  18. implicit def errorLoggingContext(implicit traceContext: TraceContext): ErrorLoggingContext
    Attributes
    protected
    Definition Classes
    NamedLogging
  19. def failureOccurred(error: String)(implicit tc: TraceContext): Unit

    Report that the component is now failed

    Report that the component is now failed

    Definition Classes
    AtomicHealthComponent
  20. def failureOccurred(error: RpcError)(implicit tc: TraceContext): Unit

    Report that the component is now failed

    Report that the component is now failed

    Definition Classes
    AtomicHealthComponent
  21. def fatalOccurred(error: String)(implicit tc: TraceContext): Unit

    Report that the component is now fatally failed and the system should be restarted.

    Report that the component is now fatally failed and the system should be restarted.

    Definition Classes
    AtomicHealthComponent
  22. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate() @native()
  23. final def getState: State

    Returns the current state

    Returns the current state

    Definition Classes
    HealthElement
  24. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate() @native()
  25. val initialHealthState: ComponentHealthState

    The initial state upon creation

    The initial state upon creation

    Definition Classes
    ResilientSequencerSubscription → HealthElement
  26. 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 performUnlessClosing and friends.

    Definition Classes
    OnShutdownRunner → HasUnlessClosing
  27. def isDegraded: Boolean
    Definition Classes
    HealthQuasiComponent
  28. def isFailed: Boolean
    Definition Classes
    HealthQuasiComponent
  29. def isFatal: Boolean
    Definition Classes
    HealthQuasiComponent
  30. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  31. def isOk: Boolean
    Definition Classes
    HealthQuasiComponent
  32. 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
  33. def logger: TracedLogger
    Attributes
    protected
    Definition Classes
    NamedLogging
  34. val loggerFactory: NamedLoggerFactory
    Attributes
    protected
    Definition Classes
    ResilientSequencerSubscription → NamedLogging
  35. def maxSleepMillis: Long

    How often to poll to check that all tasks have completed.

    How often to poll to check that all tasks have completed.

    Attributes
    protected
    Definition Classes
    PerformUnlessClosing
  36. val name: String

    Name of the health element.

    Name of the health element. Used for logging.

    Definition Classes
    ResilientSequencerSubscription → HealthElement
  37. def nameInternal: String
    Attributes
    protected[this]
    Definition Classes
    PerformUnlessClosing → HasSynchronizeWithReaders
  38. implicit def namedLoggingContext(implicit traceContext: TraceContext): NamedLoggingContext
    Attributes
    protected
    Definition Classes
    NamedLogging
  39. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  40. def noTracingLogger: Logger
    Attributes
    protected
    Definition Classes
    NamedLogging
  41. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  42. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  43. def onCloseFailure(e: Throwable): Unit
    Definition Classes
    SequencerSubscription → PerformUnlessClosing
  44. final def onClosed(): Unit
    Definition Classes
    FlagCloseableAsync → PerformUnlessClosing
  45. 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
    Annotations
    @SuppressWarnings()
  46. def performUnlessClosing[A](name: String)(f: => A)(implicit traceContext: TraceContext): UnlessShutdown[A]

    Performs the task given by f unless a shutdown has been initiated.

    Performs the task given by f unless a shutdown has been initiated. The shutdown will only begin after f completes, but other tasks may execute concurrently with f, if started using this function, or one of the other variants (performUnlessClosingF and performUnlessClosingEitherT). The tasks are assumed to take less than closingTimeout to complete.

    DO NOT CALL this.close as part of f, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, inside f.

    f

    The task to perform

    returns

    scala.None$ if a shutdown has been initiated. Otherwise the result of the task.

    Definition Classes
    PerformUnlessClosing
  47. def performUnlessClosingCheckedT[A, N, R](name: String, onClosing: => Checked[A, N, R])(etf: => CheckedT[Future, A, N, R])(implicit ec: ExecutionContext, traceContext: TraceContext): CheckedT[Future, A, N, R]
    Definition Classes
    PerformUnlessClosing
  48. def performUnlessClosingCheckedUST[A, N, R](name: String, onClosing: => Checked[A, N, R])(etf: => CheckedT[FutureUnlessShutdown, A, N, R])(implicit ec: ExecutionContext, traceContext: TraceContext): CheckedT[FutureUnlessShutdown, A, N, R]
    Definition Classes
    PerformUnlessClosing
  49. def performUnlessClosingEitherT[E, R](name: String, onClosing: => E)(etf: => EitherT[Future, E, R])(implicit ec: ExecutionContext, traceContext: TraceContext): EitherT[Future, E, R]

    Performs the EitherT[Future] given by etf 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. Both etf and the error are lazy; etf is only evaluated if there is no shutdown, the error only if we're shutting down. The shutdown will only begin after etf completes, but other tasks may execute concurrently with etf, if started using this function, or one of the other variants (performUnlessClosing and performUnlessClosingF). The tasks are assumed to take less than closingTimeout to complete.

    DO NOT CALL this.close as part of etf, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, inside f.

    etf

    The task to perform

    Definition Classes
    PerformUnlessClosing
  50. def performUnlessClosingEitherU[E, R](name: String)(etf: => EitherT[Future, E, R])(implicit ec: ExecutionContext, traceContext: TraceContext): EitherT[FutureUnlessShutdown, E, R]
    Definition Classes
    PerformUnlessClosing
  51. def performUnlessClosingEitherUSF[E, R](name: String)(etf: => EitherT[FutureUnlessShutdown, E, R])(implicit ec: ExecutionContext, traceContext: TraceContext): EitherT[FutureUnlessShutdown, E, R]
    Definition Classes
    PerformUnlessClosing
  52. def performUnlessClosingEitherUSFAsync[E, R](name: String)(etf: => EitherT[FutureUnlessShutdown, E, R])(asyncResultToWaitForF: (R) => FutureUnlessShutdown[_])(implicit ec: ExecutionContext, traceContext: TraceContext): EitherT[FutureUnlessShutdown, E, R]

    Use this method if closing/shutdown of the object should wait for asynchronous computation to finish too.

    Use this method if closing/shutdown of the object should wait for asynchronous computation to finish too.

    etf

    closing of this object will wait for all such spawned Futures to finish

    asyncResultToWaitForF

    closing of this object will wait also wait for all such asynchronous Futures to finish too

    returns

    the future spawned by etf

    Definition Classes
    PerformUnlessClosing
  53. def performUnlessClosingF[A](name: String)(f: => Future[A])(implicit ec: ExecutionContext, traceContext: TraceContext): FutureUnlessShutdown[A]

    Performs the Future given by f unless a shutdown has been initiated.

    Performs the Future given by f unless a shutdown has been initiated. The future is lazy and not evaluated during shutdown. The shutdown will only begin after f completes, but other tasks may execute concurrently with f, 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.

    DO NOT CALL this.close as part of f, because it will result in a deadlock. DO NOT PUT retries, especially indefinite ones, inside f.

    f

    The task to perform

    returns

    The future completes with com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if a shutdown has been initiated. Otherwise the result of the task wrapped in com.digitalasset.canton.lifecycle.UnlessShutdown.Outcome.

    Definition Classes
    PerformUnlessClosing
  54. def performUnlessClosingOptionUSF[R](name: String)(otf: => OptionT[FutureUnlessShutdown, R])(implicit ec: ExecutionContext, traceContext: TraceContext): OptionT[FutureUnlessShutdown, R]
    Definition Classes
    PerformUnlessClosing
  55. def performUnlessClosingUSF[A](name: String)(f: => FutureUnlessShutdown[A])(implicit ec: ExecutionContext, traceContext: TraceContext): FutureUnlessShutdown[A]
    Definition Classes
    PerformUnlessClosing
  56. def performUnlessClosingUSFAsync[A](name: String)(f: => FutureUnlessShutdown[A])(asyncResultToWaitForF: (A) => FutureUnlessShutdown[_])(implicit ec: ExecutionContext, traceContext: TraceContext): FutureUnlessShutdown[A]

    Use this method if closing/shutdown of the object should wait for asynchronous computation to finish too.

    Use this method if closing/shutdown of the object should wait for asynchronous computation to finish too.

    f

    closing of this object will wait for all such spawned Futures to finish

    asyncResultToWaitForF

    closing of this object will wait also wait for all such asynchronous Futures to finish too

    returns

    the future spawned by f

    Definition Classes
    PerformUnlessClosing
  57. def prettyState: Pretty[State]
    Attributes
    protected
    Definition Classes
    HealthQuasiComponent → HealthElement
  58. def refreshState(newState: Eval[State])(implicit traceContext: TraceContext): Unit

    Triggers a refresh of the component's state, using newState to determine the new state.

    Triggers a refresh of the component's state, using newState to determine the new state. May return before the newState has been evaluated and the listeners have been poked.

    Note that listeners need not be poked about every state change; it suffices that they are poked eventually after each state change. So if there are frequent updates to the state, possibly from concurrent calls, then the listeners may never see some intermediate states.

    Attributes
    protected
    Definition Classes
    HealthElement
  59. def registerHighPriorityOnHealthChange(listener: HealthListener): Boolean

    Registers a high priority listener that gets poked upon each change of this element's health state.

    Registers a high priority listener that gets poked upon each change of this element's health state. This listener will be run before listeners registered via registerOnHealthChange

    returns

    Whether the listener was not registered before

    Definition Classes
    HealthElement
  60. def registerOnHealthChange(listener: HealthListener, pokeIfNew: Boolean = true): Boolean

    Registers a listener that gets poked upon each change of this element's health state.

    Registers a listener that gets poked upon each change of this element's health state.

    pokeIfNew

    if true (default), poke the listener if it's new

    returns

    Whether the listener was not registered before

    Definition Classes
    HealthElement
  61. def remainingReaders(): Seq[String]
    Attributes
    protected[this]
    Definition Classes
    HasSynchronizeWithReaders
  62. 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
  63. def reportHealthState(state: State)(implicit tc: TraceContext): Unit

    Sets the state of this component and notifies its listeners

    Sets the state of this component and notifies its listeners

    Definition Classes
    AtomicHealthElement
  64. def resolveUnhealthy()(implicit traceContext: TraceContext): Unit

    Set the health state to Ok and if the previous state was unhealthy, log a message to inform about the resolution of the ongoing issue.

    Set the health state to Ok and if the previous state was unhealthy, log a message to inform about the resolution of the ongoing issue.

    Definition Classes
    AtomicHealthComponent
  65. def resubscribeOnTransportChange()(implicit traceContext: TraceContext): Future[Unit]

    Closes the current subscription with SubscriptionCloseReason.TransportChange and resubscribes using the subscriptionFactory, provided that there is currently a subscription.

    Closes the current subscription with SubscriptionCloseReason.TransportChange and resubscribes using the subscriptionFactory, provided that there is currently a subscription.

    returns

    The future completes after the old subscription has been closed.

  66. 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's closeAsync method completes or when AutoCloseable's close method returns, unless the returned LifeCycleRegistrationHandle was 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
  67. 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's closeAsync method completes or AutoCloseable's close returns. This is because the task is run immediately if the component has already been closed.

    Definition Classes
    HasRunOnClosing
  68. 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
  69. def runTaskUnlessDone(task: RunOnClosing)(implicit traceContext: TraceContext): Unit
    Attributes
    protected[this]
    Definition Classes
    OnShutdownRunner → HasRunOnClosing
  70. def start(implicit traceContext: TraceContext): Unit

    Start running the resilient sequencer subscription

  71. def stateLoggingLevel(state: ComponentHealthState): Level
    Attributes
    protected
    Definition Classes
    HealthComponent → HealthElement
  72. def synchronizeWithClosingPatience: FiniteDuration
    Attributes
    protected[this]
    Definition Classes
    PerformUnlessClosing → HasSynchronizeWithReaders
  73. def synchronizeWithReaders()(implicit traceContext: TraceContext): Boolean
    Attributes
    protected[this]
    Definition Classes
    HasSynchronizeWithReaders
  74. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  75. val timeouts: ProcessingTimeout
    Attributes
    protected
    Definition Classes
    ResilientSequencerSubscription → FlagCloseable
  76. def toComponentStatus: ComponentStatus
    Definition Classes
    HealthQuasiComponent
  77. def toString(): String
    Definition Classes
    AnyRef → Any
  78. final def unlessClosing[F[_], A](fa: => F[A])(implicit F: CanAbortDueToShutdown[F]): F[A]

    Runs the computation fa unless isClosing returns true.

    Runs the computation fa unless isClosing returns true.

    This method does not delay the closing while fa is running, unlike the methods in HasSynchronizeWithClosing. Accordingly, this method is useful for intermittent checks whether the result of the computation is still relevant.

    returns

    The result of fa or com.digitalasset.canton.lifecycle.UnlessShutdown.AbortedDueToShutdown if isClosing is true

    Definition Classes
    HasUnlessClosing
    Annotations
    @inline()
  79. def unregisterOnHealthChange(listener: HealthListener): Boolean

    Unregisters a listener.

    Unregisters a listener.

    returns

    Whether the listener was registered before.

    Definition Classes
    HealthElement
  80. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  81. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  82. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  83. def withReader[F[_], A](name: String)(f: => F[A])(implicit traceContext: TraceContext, F: Thereafter[F]): UnlessShutdown[F[A]]
    Attributes
    protected[this]
    Definition Classes
    HasSynchronizeWithReaders

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

Inherited from CloseableAtomicHealthComponent

Inherited from AtomicHealthComponent

Inherited from AtomicHealthElement

Inherited from CloseableHealthComponent

Inherited from HealthComponent

Inherited from CloseableHealthQuasiComponent

Inherited from HealthQuasiComponent

Inherited from CloseableHealthElement

Inherited from HealthElement

Inherited from SequencerSubscription[HandlerError]

Inherited from NamedLogging

Inherited from FlagCloseableAsync

Inherited from FlagCloseable

Inherited from PerformUnlessClosing

Inherited from HasSynchronizeWithReaders

Inherited from OnShutdownRunner

Inherited from HasRunOnClosing

Inherited from HasUnlessClosing

Inherited from AutoCloseable

Inherited from AnyRef

Inherited from Any

Ungrouped