Class: HistoryEvent

history.v1.HistoryEvent

History events are the method by which Temporal SDKs advance (or recreate) workflow state. See the EventType enum for more info about what each event is for.

Implements

• IHistoryEvent

Constructors

constructor

• new HistoryEvent(properties?): HistoryEvent

Constructs a new HistoryEvent.

Parameters

Name	Type	Description
properties?	IHistoryEvent	Properties to set

Returns

HistoryEvent

Properties

activityPropertiesModifiedExternallyEventAttributes

• Optional activityPropertiesModifiedExternallyEventAttributes: null | IActivityPropertiesModifiedExternallyEventAttributes

HistoryEvent activityPropertiesModifiedExternallyEventAttributes.

Implementation of

IHistoryEvent.activityPropertiesModifiedExternallyEventAttributes

---

activityTaskCancelRequestedEventAttributes

• Optional activityTaskCancelRequestedEventAttributes: null | IActivityTaskCancelRequestedEventAttributes

HistoryEvent activityTaskCancelRequestedEventAttributes.

Implementation of

IHistoryEvent.activityTaskCancelRequestedEventAttributes

---

activityTaskCanceledEventAttributes

• Optional activityTaskCanceledEventAttributes: null | IActivityTaskCanceledEventAttributes

HistoryEvent activityTaskCanceledEventAttributes.

Implementation of

IHistoryEvent.activityTaskCanceledEventAttributes

---

activityTaskCompletedEventAttributes

• Optional activityTaskCompletedEventAttributes: null | IActivityTaskCompletedEventAttributes

HistoryEvent activityTaskCompletedEventAttributes.

Implementation of

IHistoryEvent.activityTaskCompletedEventAttributes

---

activityTaskFailedEventAttributes

• Optional activityTaskFailedEventAttributes: null | IActivityTaskFailedEventAttributes

HistoryEvent activityTaskFailedEventAttributes.

Implementation of

IHistoryEvent.activityTaskFailedEventAttributes

---

activityTaskScheduledEventAttributes

• Optional activityTaskScheduledEventAttributes: null | IActivityTaskScheduledEventAttributes

HistoryEvent activityTaskScheduledEventAttributes.

Implementation of

IHistoryEvent.activityTaskScheduledEventAttributes

---

activityTaskStartedEventAttributes

• Optional activityTaskStartedEventAttributes: null | IActivityTaskStartedEventAttributes

HistoryEvent activityTaskStartedEventAttributes.

Implementation of

IHistoryEvent.activityTaskStartedEventAttributes

---

activityTaskTimedOutEventAttributes

• Optional activityTaskTimedOutEventAttributes: null | IActivityTaskTimedOutEventAttributes

HistoryEvent activityTaskTimedOutEventAttributes.

Implementation of

IHistoryEvent.activityTaskTimedOutEventAttributes

---

attributes

• Optional attributes: "workflowExecutionStartedEventAttributes" | "workflowExecutionCompletedEventAttributes" | "workflowExecutionFailedEventAttributes" | "workflowExecutionTimedOutEventAttributes" | "workflowTaskScheduledEventAttributes" | "workflowTaskStartedEventAttributes" | "workflowTaskCompletedEventAttributes" | "workflowTaskTimedOutEventAttributes" | "workflowTaskFailedEventAttributes" | "activityTaskScheduledEventAttributes" | "activityTaskStartedEventAttributes" | "activityTaskCompletedEventAttributes" | "activityTaskFailedEventAttributes" | "activityTaskTimedOutEventAttributes" | "timerStartedEventAttributes" | "timerFiredEventAttributes" | "activityTaskCancelRequestedEventAttributes" | "activityTaskCanceledEventAttributes" | "timerCanceledEventAttributes" | "markerRecordedEventAttributes" | "workflowExecutionSignaledEventAttributes" | "workflowExecutionTerminatedEventAttributes" | "workflowExecutionCancelRequestedEventAttributes" | "workflowExecutionCanceledEventAttributes" | "requestCancelExternalWorkflowExecutionInitiatedEventAttributes" | "requestCancelExternalWorkflowExecutionFailedEventAttributes" | "externalWorkflowExecutionCancelRequestedEventAttributes" | "workflowExecutionContinuedAsNewEventAttributes" | "startChildWorkflowExecutionInitiatedEventAttributes" | "startChildWorkflowExecutionFailedEventAttributes" | "childWorkflowExecutionStartedEventAttributes" | "childWorkflowExecutionCompletedEventAttributes" | "childWorkflowExecutionFailedEventAttributes" | "childWorkflowExecutionCanceledEventAttributes" | "childWorkflowExecutionTimedOutEventAttributes" | "childWorkflowExecutionTerminatedEventAttributes" | "signalExternalWorkflowExecutionInitiatedEventAttributes" | "signalExternalWorkflowExecutionFailedEventAttributes" | "externalWorkflowExecutionSignaledEventAttributes" | "upsertWorkflowSearchAttributesEventAttributes" | "workflowExecutionUpdateAcceptedEventAttributes" | "workflowExecutionUpdateRejectedEventAttributes" | "workflowExecutionUpdateCompletedEventAttributes" | "workflowPropertiesModifiedExternallyEventAttributes" | "activityPropertiesModifiedExternallyEventAttributes" | "workflowPropertiesModifiedEventAttributes" | "workflowExecutionUpdateAdmittedEventAttributes" | "nexusOperationScheduledEventAttributes" | "nexusOperationStartedEventAttributes" | "nexusOperationCompletedEventAttributes" | "nexusOperationFailedEventAttributes" | "nexusOperationCanceledEventAttributes" | "nexusOperationTimedOutEventAttributes" | "nexusOperationCancelRequestedEventAttributes"

The event details. The type must match that in event_type.

---

childWorkflowExecutionCanceledEventAttributes

• Optional childWorkflowExecutionCanceledEventAttributes: null | IChildWorkflowExecutionCanceledEventAttributes

HistoryEvent childWorkflowExecutionCanceledEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionCanceledEventAttributes

---

childWorkflowExecutionCompletedEventAttributes

• Optional childWorkflowExecutionCompletedEventAttributes: null | IChildWorkflowExecutionCompletedEventAttributes

HistoryEvent childWorkflowExecutionCompletedEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionCompletedEventAttributes

---

childWorkflowExecutionFailedEventAttributes

• Optional childWorkflowExecutionFailedEventAttributes: null | IChildWorkflowExecutionFailedEventAttributes

HistoryEvent childWorkflowExecutionFailedEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionFailedEventAttributes

---

childWorkflowExecutionStartedEventAttributes

• Optional childWorkflowExecutionStartedEventAttributes: null | IChildWorkflowExecutionStartedEventAttributes

HistoryEvent childWorkflowExecutionStartedEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionStartedEventAttributes

---

childWorkflowExecutionTerminatedEventAttributes

• Optional childWorkflowExecutionTerminatedEventAttributes: null | IChildWorkflowExecutionTerminatedEventAttributes

HistoryEvent childWorkflowExecutionTerminatedEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionTerminatedEventAttributes

---

childWorkflowExecutionTimedOutEventAttributes

• Optional childWorkflowExecutionTimedOutEventAttributes: null | IChildWorkflowExecutionTimedOutEventAttributes

HistoryEvent childWorkflowExecutionTimedOutEventAttributes.

Implementation of

IHistoryEvent.childWorkflowExecutionTimedOutEventAttributes

---

eventId

• eventId: Long

Monotonically increasing event number, starts at 1.

Implementation of

IHistoryEvent.eventId

---

eventTime

• Optional eventTime: null | ITimestamp

HistoryEvent eventTime.

Implementation of

IHistoryEvent.eventTime

---

eventType

• eventType: EventType

HistoryEvent eventType.

Implementation of

IHistoryEvent.eventType

---

externalWorkflowExecutionCancelRequestedEventAttributes

• Optional externalWorkflowExecutionCancelRequestedEventAttributes: null | IExternalWorkflowExecutionCancelRequestedEventAttributes

HistoryEvent externalWorkflowExecutionCancelRequestedEventAttributes.

Implementation of

IHistoryEvent.externalWorkflowExecutionCancelRequestedEventAttributes

---

externalWorkflowExecutionSignaledEventAttributes

• Optional externalWorkflowExecutionSignaledEventAttributes: null | IExternalWorkflowExecutionSignaledEventAttributes

HistoryEvent externalWorkflowExecutionSignaledEventAttributes.

Implementation of

IHistoryEvent.externalWorkflowExecutionSignaledEventAttributes

---

links

• links: ILink[]

Links associated with the event.

Implementation of

IHistoryEvent.links

---

markerRecordedEventAttributes

• Optional markerRecordedEventAttributes: null | IMarkerRecordedEventAttributes

HistoryEvent markerRecordedEventAttributes.

Implementation of

IHistoryEvent.markerRecordedEventAttributes

---

nexusOperationCancelRequestedEventAttributes

• Optional nexusOperationCancelRequestedEventAttributes: null | INexusOperationCancelRequestedEventAttributes

HistoryEvent nexusOperationCancelRequestedEventAttributes.

Implementation of

IHistoryEvent.nexusOperationCancelRequestedEventAttributes

---

nexusOperationCanceledEventAttributes

• Optional nexusOperationCanceledEventAttributes: null | INexusOperationCanceledEventAttributes

HistoryEvent nexusOperationCanceledEventAttributes.

Implementation of

IHistoryEvent.nexusOperationCanceledEventAttributes

---

nexusOperationCompletedEventAttributes

• Optional nexusOperationCompletedEventAttributes: null | INexusOperationCompletedEventAttributes

HistoryEvent nexusOperationCompletedEventAttributes.

Implementation of

IHistoryEvent.nexusOperationCompletedEventAttributes

---

nexusOperationFailedEventAttributes

• Optional nexusOperationFailedEventAttributes: null | INexusOperationFailedEventAttributes

HistoryEvent nexusOperationFailedEventAttributes.

Implementation of

IHistoryEvent.nexusOperationFailedEventAttributes

---

nexusOperationScheduledEventAttributes

• Optional nexusOperationScheduledEventAttributes: null | INexusOperationScheduledEventAttributes

HistoryEvent nexusOperationScheduledEventAttributes.

Implementation of

IHistoryEvent.nexusOperationScheduledEventAttributes

---

nexusOperationStartedEventAttributes

• Optional nexusOperationStartedEventAttributes: null | INexusOperationStartedEventAttributes

HistoryEvent nexusOperationStartedEventAttributes.

Implementation of

IHistoryEvent.nexusOperationStartedEventAttributes

---

nexusOperationTimedOutEventAttributes

• Optional nexusOperationTimedOutEventAttributes: null | INexusOperationTimedOutEventAttributes

HistoryEvent nexusOperationTimedOutEventAttributes.

Implementation of

IHistoryEvent.nexusOperationTimedOutEventAttributes

---

requestCancelExternalWorkflowExecutionFailedEventAttributes

• Optional requestCancelExternalWorkflowExecutionFailedEventAttributes: null | IRequestCancelExternalWorkflowExecutionFailedEventAttributes

HistoryEvent requestCancelExternalWorkflowExecutionFailedEventAttributes.

Implementation of

IHistoryEvent.requestCancelExternalWorkflowExecutionFailedEventAttributes

---

requestCancelExternalWorkflowExecutionInitiatedEventAttributes

• Optional requestCancelExternalWorkflowExecutionInitiatedEventAttributes: null | IRequestCancelExternalWorkflowExecutionInitiatedEventAttributes

HistoryEvent requestCancelExternalWorkflowExecutionInitiatedEventAttributes.

Implementation of

IHistoryEvent.requestCancelExternalWorkflowExecutionInitiatedEventAttributes

---

signalExternalWorkflowExecutionFailedEventAttributes

• Optional signalExternalWorkflowExecutionFailedEventAttributes: null | ISignalExternalWorkflowExecutionFailedEventAttributes

HistoryEvent signalExternalWorkflowExecutionFailedEventAttributes.

Implementation of

IHistoryEvent.signalExternalWorkflowExecutionFailedEventAttributes

---

signalExternalWorkflowExecutionInitiatedEventAttributes

• Optional signalExternalWorkflowExecutionInitiatedEventAttributes: null | ISignalExternalWorkflowExecutionInitiatedEventAttributes

HistoryEvent signalExternalWorkflowExecutionInitiatedEventAttributes.

Implementation of

IHistoryEvent.signalExternalWorkflowExecutionInitiatedEventAttributes

---

startChildWorkflowExecutionFailedEventAttributes

• Optional startChildWorkflowExecutionFailedEventAttributes: null | IStartChildWorkflowExecutionFailedEventAttributes

HistoryEvent startChildWorkflowExecutionFailedEventAttributes.

Implementation of

IHistoryEvent.startChildWorkflowExecutionFailedEventAttributes

---

startChildWorkflowExecutionInitiatedEventAttributes

• Optional startChildWorkflowExecutionInitiatedEventAttributes: null | IStartChildWorkflowExecutionInitiatedEventAttributes

HistoryEvent startChildWorkflowExecutionInitiatedEventAttributes.

Implementation of

IHistoryEvent.startChildWorkflowExecutionInitiatedEventAttributes

---

taskId

• taskId: Long

TODO: What is this? Appears unused by SDKs

Implementation of

IHistoryEvent.taskId

---

timerCanceledEventAttributes

• Optional timerCanceledEventAttributes: null | ITimerCanceledEventAttributes

HistoryEvent timerCanceledEventAttributes.

Implementation of

IHistoryEvent.timerCanceledEventAttributes

---

timerFiredEventAttributes

• Optional timerFiredEventAttributes: null | ITimerFiredEventAttributes

HistoryEvent timerFiredEventAttributes.

Implementation of

IHistoryEvent.timerFiredEventAttributes

---

timerStartedEventAttributes

• Optional timerStartedEventAttributes: null | ITimerStartedEventAttributes

HistoryEvent timerStartedEventAttributes.

Implementation of

IHistoryEvent.timerStartedEventAttributes

---

upsertWorkflowSearchAttributesEventAttributes

• Optional upsertWorkflowSearchAttributesEventAttributes: null | IUpsertWorkflowSearchAttributesEventAttributes

HistoryEvent upsertWorkflowSearchAttributesEventAttributes.

Implementation of

IHistoryEvent.upsertWorkflowSearchAttributesEventAttributes

---

userMetadata

• Optional userMetadata: null | IUserMetadata

Metadata on the event. This is often carried over from commands and client calls. Most events won't have this information, and how this information is used is dependent upon the interface that reads it.

Current well-known uses:

• workflow_execution_started_event_attributes - summary and details from start workflow.
• timer_started_event_attributes - summary represents an identifier for the timer for use by user interfaces.

Implementation of

IHistoryEvent.userMetadata

---

version

• version: Long

TODO: What is this? Appears unused by SDKs

Implementation of

IHistoryEvent.version

---

workerMayIgnore

• workerMayIgnore: boolean

Set to true when the SDK may ignore the event as it does not impact workflow state or information in any way that the SDK need be concerned with. If an SDK encounters an event type which it does not understand, it must error unless this is true. If it is true, it's acceptable for the event type and/or attributes to be uninterpretable.

Implementation of

IHistoryEvent.workerMayIgnore

---

workflowExecutionCancelRequestedEventAttributes

• Optional workflowExecutionCancelRequestedEventAttributes: null | IWorkflowExecutionCancelRequestedEventAttributes

HistoryEvent workflowExecutionCancelRequestedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionCancelRequestedEventAttributes

---

workflowExecutionCanceledEventAttributes

• Optional workflowExecutionCanceledEventAttributes: null | IWorkflowExecutionCanceledEventAttributes

HistoryEvent workflowExecutionCanceledEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionCanceledEventAttributes

---

workflowExecutionCompletedEventAttributes

• Optional workflowExecutionCompletedEventAttributes: null | IWorkflowExecutionCompletedEventAttributes

HistoryEvent workflowExecutionCompletedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionCompletedEventAttributes

---

workflowExecutionContinuedAsNewEventAttributes

• Optional workflowExecutionContinuedAsNewEventAttributes: null | IWorkflowExecutionContinuedAsNewEventAttributes

HistoryEvent workflowExecutionContinuedAsNewEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionContinuedAsNewEventAttributes

---

workflowExecutionFailedEventAttributes

• Optional workflowExecutionFailedEventAttributes: null | IWorkflowExecutionFailedEventAttributes

HistoryEvent workflowExecutionFailedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionFailedEventAttributes

---

workflowExecutionSignaledEventAttributes

• Optional workflowExecutionSignaledEventAttributes: null | IWorkflowExecutionSignaledEventAttributes

HistoryEvent workflowExecutionSignaledEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionSignaledEventAttributes

---

workflowExecutionStartedEventAttributes

• Optional workflowExecutionStartedEventAttributes: null | IWorkflowExecutionStartedEventAttributes

HistoryEvent workflowExecutionStartedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionStartedEventAttributes

---

workflowExecutionTerminatedEventAttributes

• Optional workflowExecutionTerminatedEventAttributes: null | IWorkflowExecutionTerminatedEventAttributes

HistoryEvent workflowExecutionTerminatedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionTerminatedEventAttributes

---

workflowExecutionTimedOutEventAttributes

• Optional workflowExecutionTimedOutEventAttributes: null | IWorkflowExecutionTimedOutEventAttributes

HistoryEvent workflowExecutionTimedOutEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionTimedOutEventAttributes

---

workflowExecutionUpdateAcceptedEventAttributes

• Optional workflowExecutionUpdateAcceptedEventAttributes: null | IWorkflowExecutionUpdateAcceptedEventAttributes

HistoryEvent workflowExecutionUpdateAcceptedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionUpdateAcceptedEventAttributes

---

workflowExecutionUpdateAdmittedEventAttributes

• Optional workflowExecutionUpdateAdmittedEventAttributes: null | IWorkflowExecutionUpdateAdmittedEventAttributes

HistoryEvent workflowExecutionUpdateAdmittedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionUpdateAdmittedEventAttributes

---

workflowExecutionUpdateCompletedEventAttributes

• Optional workflowExecutionUpdateCompletedEventAttributes: null | IWorkflowExecutionUpdateCompletedEventAttributes

HistoryEvent workflowExecutionUpdateCompletedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionUpdateCompletedEventAttributes

---

workflowExecutionUpdateRejectedEventAttributes

• Optional workflowExecutionUpdateRejectedEventAttributes: null | IWorkflowExecutionUpdateRejectedEventAttributes

HistoryEvent workflowExecutionUpdateRejectedEventAttributes.

Implementation of

IHistoryEvent.workflowExecutionUpdateRejectedEventAttributes

---

workflowPropertiesModifiedEventAttributes

• Optional workflowPropertiesModifiedEventAttributes: null | IWorkflowPropertiesModifiedEventAttributes

HistoryEvent workflowPropertiesModifiedEventAttributes.

Implementation of

IHistoryEvent.workflowPropertiesModifiedEventAttributes

---

workflowPropertiesModifiedExternallyEventAttributes

• Optional workflowPropertiesModifiedExternallyEventAttributes: null | IWorkflowPropertiesModifiedExternallyEventAttributes

HistoryEvent workflowPropertiesModifiedExternallyEventAttributes.

Implementation of

IHistoryEvent.workflowPropertiesModifiedExternallyEventAttributes

---

workflowTaskCompletedEventAttributes

• Optional workflowTaskCompletedEventAttributes: null | IWorkflowTaskCompletedEventAttributes

HistoryEvent workflowTaskCompletedEventAttributes.

Implementation of

IHistoryEvent.workflowTaskCompletedEventAttributes

---

workflowTaskFailedEventAttributes

• Optional workflowTaskFailedEventAttributes: null | IWorkflowTaskFailedEventAttributes

HistoryEvent workflowTaskFailedEventAttributes.

Implementation of

IHistoryEvent.workflowTaskFailedEventAttributes

---

workflowTaskScheduledEventAttributes

• Optional workflowTaskScheduledEventAttributes: null | IWorkflowTaskScheduledEventAttributes

HistoryEvent workflowTaskScheduledEventAttributes.

Implementation of

IHistoryEvent.workflowTaskScheduledEventAttributes

---

workflowTaskStartedEventAttributes

• Optional workflowTaskStartedEventAttributes: null | IWorkflowTaskStartedEventAttributes

HistoryEvent workflowTaskStartedEventAttributes.

Implementation of

IHistoryEvent.workflowTaskStartedEventAttributes

---

workflowTaskTimedOutEventAttributes

• Optional workflowTaskTimedOutEventAttributes: null | IWorkflowTaskTimedOutEventAttributes

HistoryEvent workflowTaskTimedOutEventAttributes.

Implementation of

IHistoryEvent.workflowTaskTimedOutEventAttributes

Methods

toJSON

▸ toJSON(): Object

Converts this HistoryEvent to JSON.

Returns

Object

JSON object

---

create

▸ create(properties?): HistoryEvent

Creates a new HistoryEvent instance using the specified properties.

Parameters

Name	Type	Description
properties?	IHistoryEvent	Properties to set

Returns

HistoryEvent

HistoryEvent instance

---

decode

▸ decode(reader, length?): HistoryEvent

Decodes a HistoryEvent message from the specified reader or buffer.

Parameters

Name	Type	Description
reader	Uint8Array | Reader	Reader or buffer to decode from
length?	number	Message length if known beforehand

Returns

HistoryEvent

HistoryEvent

Throws

If the payload is not a reader or valid buffer

Throws

If required fields are missing

---

decodeDelimited

▸ decodeDelimited(reader): HistoryEvent

Decodes a HistoryEvent message from the specified reader or buffer, length delimited.

Parameters

Name	Type	Description
reader	Uint8Array | Reader	Reader or buffer to decode from

Returns

HistoryEvent

HistoryEvent

Throws

If the payload is not a reader or valid buffer

Throws

If required fields are missing

---

encode

▸ encode(message, writer?): Writer

Encodes the specified HistoryEvent message. Does not implicitly temporal.api.history.v1.HistoryEvent.verify|verify messages.

Parameters

Name	Type	Description
message	IHistoryEvent	HistoryEvent message or plain object to encode
writer?	Writer	Writer to encode to

Returns

Writer

Writer

---

encodeDelimited

▸ encodeDelimited(message, writer?): Writer

Encodes the specified HistoryEvent message, length delimited. Does not implicitly temporal.api.history.v1.HistoryEvent.verify|verify messages.

Parameters

Name	Type	Description
message	IHistoryEvent	HistoryEvent message or plain object to encode
writer?	Writer	Writer to encode to

Returns

Writer

Writer

---

fromObject

▸ fromObject(object): HistoryEvent

Creates a HistoryEvent message from a plain object. Also converts values to their respective internal types.

Parameters

Name	Type	Description
object	Object	Plain object

Returns

HistoryEvent

HistoryEvent

---

getTypeUrl

▸ getTypeUrl(typeUrlPrefix?): string

Gets the default type url for HistoryEvent

Parameters

Name	Type	Description
typeUrlPrefix?	string	your custom typeUrlPrefix(default "type.googleapis.com")

Returns

string

The default type url

---

toObject

▸ toObject(message, options?): Object

Creates a plain object from a HistoryEvent message. Also converts values to other types if specified.

Parameters

Name	Type	Description
message	HistoryEvent	HistoryEvent
options?	IConversionOptions	Conversion options

Returns

Object

Plain object