Class: AWS::SimpleWorkflow::HistoryEvent

Inherits:
Object
  • Object
show all
Defined in:
lib/aws/simple_workflow/history_event.rb

Overview

Getting History Events

History events belong to workflow executions. You can get them from an execution two ways:

1) By enumerating events from the execution

workflow_execution.events.each do |event|
  # ...
end

2) By enumerating events from the context of a DecisionTask:

workflow_execution.decision_tasks.poll do |decision_task|
  decision_task.events.each do |event|
  end
end

History Event Attributes

All history events respond to the following 4 methods:

For a complete list of event types and a complete list of attributes returned with each event type, see the service API documentation.

Because the service returns attributes with camelCase name the structure returned by #attributes allows you to access attributes by their snake_case name or their camelCase name:

event.attributes.workflow_type
event.attributes['workflowType']

See Attributes for more information about working with the returned attributes.

Defined Under Namespace

Classes: Attributes

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(workflow_execution, details) ⇒ HistoryEvent

Returns a new instance of HistoryEvent.

Parameters:

  • workflow_execution (WorkflowExecution)
  • details (Hash, String) —

    A hash or JSON string describing the history event.



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# File 'lib/aws/simple_workflow/history_event.rb', line 68

def initialize workflow_execution, details

  @workflow_execution = workflow_execution
  @details = details.is_a?(String) ? JSON.parse(details) : details
  @event_type = @details['eventType']
  @event_id = @details['eventId']
  @created_at = Time.at(@details['eventTimestamp'])

  attributes_key = "#{event_type}EventAttributes"
  attributes_key[0] = attributes_key[0,1].downcase
  attribute_data = @details[attributes_key] || {}
  @attributes = Attributes.new(workflow_execution, attribute_data)

  super

end

Instance Attribute Details

#attributes ⇒ Attributes (readonly)

Returns an object that provides hash-like access to the history event attributes.

Returns:

  • (Attributes) —

    Returns an object that provides hash-like access to the history event attributes.



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# File 'lib/aws/simple_workflow/history_event.rb', line 101

def attributes
  @attributes
end

#created_at ⇒ Time (readonly)

Returns When the event history was created.

Returns:

  • (Time) —

    When the event history was created.



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# File 'lib/aws/simple_workflow/history_event.rb', line 97

def created_at
  @created_at
end

#event_id ⇒ Integer (readonly) Also known as: id

Returns the event id.

Returns:

  • (Integer) —

    Returns the event id.



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# File 'lib/aws/simple_workflow/history_event.rb', line 93

def event_id
  @event_id
end

#event_type ⇒ String (readonly)

Returns the name of the history event type.

Returns:

  • (String) —

    Returns the name of the history event type.



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# File 'lib/aws/simple_workflow/history_event.rb', line 90

def event_type
  @event_type
end

#workflow_execution ⇒ WorkflowExecution (readonly)

Returns The workflow execution this history event belongs to.

Returns:



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# File 'lib/aws/simple_workflow/history_event.rb', line 87

def workflow_execution
  @workflow_execution
end

Instance Method Details

#to_h ⇒ Hash

Returns a hash representation of the event.

Returns:

  • (Hash) —

    Returns a hash representation of the event.



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# File 'lib/aws/simple_workflow/history_event.rb', line 104

def to_h
  {
    :event_type => event_type,
    :event_id => event_id,
    :created_at => created_at,
    :attributes => attributes.to_h,
  }
end

#to_json ⇒ String

Returns a JSON representation of this workflow execution.

Returns:

  • (String) —

    Returns a JSON representation of this workflow execution.



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# File 'lib/aws/simple_workflow/history_event.rb', line 115

def to_json
  @details.to_json
end