Class: OpenC3::ActivityModel

Inherits:
Model show all
Defined in:
lib/openc3/models/activity_model.rb

Constant Summary collapse

MAX_DURATION = 
Time::SEC_PER_DAY
PRIMARY_KEY =

MUST be equal to ‘TimelineModel::PRIMARY_KEY` minus the leading __

'__openc3_timelines'.freeze
VALID_KINDS =

See run_activity(activity) in openc3/lib/openc3/microservices/timeline_microservice.rb

%w(command script reserve expire)

Instance Attribute Summary collapse

Attributes inherited from Model

#name, #plugin, #scope, #updated_at

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Model

#check_disable_erb, #deploy, #destroyed?, filter, find_all_by_plugin, get_all_models, get_model, handle_config, names, set, store, store_queued, #undeploy

Constructor Details

#initialize(name:, start:, stop:, kind:, data:, scope:, updated_at: 0, fulfillment: nil, events: nil, recurring: {}) ⇒ ActivityModel

Returns a new instance of ActivityModel.



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# File 'lib/openc3/models/activity_model.rb', line 136

def initialize(
  name:,
  start:,
  stop:,
  kind:,
  data:,
  scope:,
  updated_at: 0,
  fulfillment: nil,
  events: nil,
  recurring: {}
)
  super("#{scope}#{PRIMARY_KEY}__#{name}", name: name, scope: scope)
  set_input(
    fulfillment: fulfillment,
    start: start,
    stop: stop,
    kind: kind,
    data: data,
    events: events,
    recurring: recurring,
  )
  @updated_at = updated_at
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/openc3/models/activity_model.rb', line 134

def data
  @data
end

#events ⇒ Object (readonly)

Returns the value of attribute events.



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# File 'lib/openc3/models/activity_model.rb', line 134

def events
  @events
end

#fulfillment ⇒ Object (readonly)

Returns the value of attribute fulfillment.



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# File 'lib/openc3/models/activity_model.rb', line 134

def fulfillment
  @fulfillment
end

#kind ⇒ Object (readonly)

Returns the value of attribute kind.



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# File 'lib/openc3/models/activity_model.rb', line 134

def kind
  @kind
end

#recurring ⇒ Object (readonly)

Returns the value of attribute recurring.



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# File 'lib/openc3/models/activity_model.rb', line 134

def recurring
  @recurring
end

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'lib/openc3/models/activity_model.rb', line 134

def start
  @start
end

#stop ⇒ Object (readonly)

Returns the value of attribute stop.



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# File 'lib/openc3/models/activity_model.rb', line 134

def stop
  @stop
end

Class Method Details

.activities(name:, scope:) ⇒ Array|nil

Called via the microservice this gets the previous 00:00:15 to 01:01:00. This should allow for a small buffer around the timeline to make sure the schedule doesn’t get stale. 00:00:15 was selected as the schedule queue used in the microservice has round robin array with 15 slots to make sure we don’t miss a planned task.

Returns:

  • (Array|nil) —

    Array of the next hour in the sorted set



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# File 'lib/openc3/models/activity_model.rb', line 47

def self.activities(name:, scope:)
  now = Time.now.to_i
  start_score = now - 15
  stop_score = (now + 3660)
  array = Store.zrangebyscore("#{scope}#{PRIMARY_KEY}__#{name}", start_score, stop_score)
  ret_array = Array.new
  array.each do |value|
    ret_array << ActivityModel.from_json(value, name: name, scope: scope)
  end
  return ret_array
end

.all(name:, scope:, limit: 100) ⇒ Array<Hash>

Returns Array up to the limit of the models (as Hash objects) stored under the primary key.

Returns:

  • (Array<Hash>) —

    Array up to the limit of the models (as Hash objects) stored under the primary key



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# File 'lib/openc3/models/activity_model.rb', line 74

def self.all(name:, scope:, limit: 100)
  array = Store.zrange("#{scope}#{PRIMARY_KEY}__#{name}", 0, -1, :limit => [0, limit])
  ret_array = Array.new
  array.each do |value|
    ret_array << JSON.parse(value, :allow_nan => true, :create_additions => true)
  end
  return ret_array
end

.count(name:, scope:) ⇒ Integer

Returns count of the members stored under the primary key.

Returns:

  • (Integer) —

    count of the members stored under the primary key



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# File 'lib/openc3/models/activity_model.rb', line 93

def self.count(name:, scope:)
  return Store.zcard("#{scope}#{PRIMARY_KEY}__#{name}")
end

.destroy(name:, scope:, score:) ⇒ Integer

Remove one member from a sorted set.

Returns:

  • (Integer) —

    count of the members removed



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# File 'lib/openc3/models/activity_model.rb', line 99

def self.destroy(name:, scope:, score:)
  result = Store.zremrangebyscore("#{scope}#{PRIMARY_KEY}__#{name}", score, score)
  notification = {
    # start / stop to match SortedModel
    'data' => JSON.generate({'start' => score}),
    'kind' => 'deleted',
    'type' => 'activity',
    'timeline' => name
  }
  TimelineTopic.write_activity(notification, scope: scope)
  return result
end

.from_json(json, name:, scope:) ⇒ ActivityModel

Returns Model generated from the passed JSON.

Returns:



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# File 'lib/openc3/models/activity_model.rb', line 128

def self.from_json(json, name:, scope:)
  json = JSON.parse(json, :allow_nan => true, :create_additions => true) if String === json
  raise "json data is nil" if json.nil?
  self.new(**json.transform_keys(&:to_sym), name: name, scope: scope)
end

.get(name:, start:, stop:, scope:, limit: 100) ⇒ Array|nil

Returns Array up to 100 of this model or empty array if name not found under primary_key.

Returns:

  • (Array|nil) —

    Array up to 100 of this model or empty array if name not found under primary_key



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# File 'lib/openc3/models/activity_model.rb', line 60

def self.get(name:, start:, stop:, scope:, limit: 100)
  if start > stop
    raise ActivityInputError.new "start: #{start} must be before stop: #{stop}"
  end

  array = Store.zrangebyscore("#{scope}#{PRIMARY_KEY}__#{name}", start, stop, :limit => [0, limit])
  ret_array = Array.new
  array.each do |value|
    ret_array << JSON.parse(value, :allow_nan => true, :create_additions => true)
  end
  return ret_array
end

.range_destroy(name:, scope:, min:, max:) ⇒ Integer

Remove members from min to max of the sorted set.

Returns:

  • (Integer) —

    count of the members removed



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# File 'lib/openc3/models/activity_model.rb', line 114

def self.range_destroy(name:, scope:, min:, max:)
  result = Store.zremrangebyscore("#{scope}#{PRIMARY_KEY}__#{name}", min, max)
  notification = {
    # start / stop to match SortedModel
    'data' => JSON.generate({'start' => min, 'stop' => max}),
    'kind' => 'deleted',
    'type' => 'activity',
    'timeline' => name
  }
  TimelineTopic.write_activity(notification, scope: scope)
  return result
end

.score(name:, score:, scope:) ⇒ String|nil

Returns String of the saved json or nil if score not found under primary_key.

Returns:

  • (String|nil) —

    String of the saved json or nil if score not found under primary_key



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# File 'lib/openc3/models/activity_model.rb', line 84

def self.score(name:, score:, scope:)
  array = Store.zrangebyscore("#{scope}#{PRIMARY_KEY}__#{name}", score, score, :limit => [0, 1])
  array.each do |value|
    return ActivityModel.from_json(value, name: name, scope: scope)
  end
  return nil
end

Instance Method Details

#add_event(status:) ⇒ Object

add_event will make an event. This will NOT save the object to the redis database

Parameters:

  • status (String) —

    • the event status such as "queued" or "updated" or "created"



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# File 'lib/openc3/models/activity_model.rb', line 348

def add_event(status:)
  event = {
    'time' => Time.now.to_i,
    'event' => status
  }
  @events << event
end

#as_json(*a) ⇒ Hash

Returns generated from the ActivityModel.

Returns:

  • (Hash) —

    generated from the ActivityModel



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# File 'lib/openc3/models/activity_model.rb', line 391

def as_json(*a)
  {
    'name' => @name,
    'updated_at' => @updated_at,
    'fulfillment' => @fulfillment,
    'start' => @start,
    'stop' => @stop,
    'kind' => @kind,
    'events' => @events,
    'data' => @data.as_json(*a),
    'recurring' => @recurring.as_json(*a)
  }
end

#commit(status:, message: nil, fulfillment: nil) ⇒ Object

commit will make an event and save the object to the redis database

Parameters:

  • status (String) —

    • the event status such as "complete" or "failed"

  • message (String) (defaults to: nil) —

    • an optional message to include in the event



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# File 'lib/openc3/models/activity_model.rb', line 330

def commit(status:, message: nil, fulfillment: nil)
  event = {
    'time' => Time.now.to_i,
    'event' => status,
    'commit' => true
  }
  event['message'] = message unless message.nil?
  @fulfillment = fulfillment.nil? ? @fulfillment : fulfillment
  @events << event
  Store.multi do |multi|
    multi.zremrangebyscore(@primary_key, @start, @start)
    multi.zadd(@primary_key, @start, JSON.generate(self.as_json(:allow_nan => true)))
  end
  notify(kind: 'event')
end

#create ⇒ Object

Update the Redis hash at primary_key and set the score equal to the start Epoch time the member is set to the JSON generated via calling as_json



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# File 'lib/openc3/models/activity_model.rb', line 236

def create
  if @recurring['end'] and @recurring['frequency'] and @recurring['span']
    # First validate the initial recurring activity ... all others are just offsets
    validate_input(start: @start, stop: @stop, kind: @kind, data: @data)

    # Create a uuid for deleting related recurring in the future
    @recurring['uuid'] = SecureRandom.uuid
    @recurring['start'] = @start
    duration = @stop - @start
    recurrance = 0
    case @recurring['span']
    when 'minutes'
      recurrance = @recurring['frequency'].to_i * 60
    when 'hours'
      recurrance = @recurring['frequency'].to_i * 3600
    when 'days'
      recurrance = @recurring['frequency'].to_i * 86400
    end

    # Get all the existing events in the recurring time range as well as those before
    # the start of the recurring time range to ensure we don't start inside an existing event
    existing = Store.zrevrangebyscore(@primary_key, @recurring['end'] - 1, @recurring['start'] - MAX_DURATION)
    existing.map! {|value| JSON.parse(value, :allow_nan => true, :create_additions => true) }
    last_stop = nil

    # Update @updated_at and add an event assuming it all completes ok
    @updated_at = Time.now.to_nsec_from_epoch
    add_event(status: 'created')

    Store.multi do |multi|
      (@start..@recurring['end']).step(recurrance).each do |start_time|
        @start = start_time
        @stop = start_time + duration

        if last_stop and @start < last_stop
          @events.pop # Remove previously created event
          raise ActivityOverlapError.new "Recurring activity overlap. Increase recurrance delta or decrease activity duration."
        end
        existing.each do |value|
          if (@start >= value['start'] and @start < value['stop']) ||
            (@stop > value['start'] and @stop <= value['stop'])
            @events.pop # Remove previously created event
            raise ActivityOverlapError.new "activity overlaps existing at #{value['start']}"
          end
        end
        multi.zadd(@primary_key, @start, JSON.generate(self.as_json(:allow_nan => true)))
        last_stop = @stop
      end
    end
    notify(kind: 'created')
  else
    validate_input(start: @start, stop: @stop, kind: @kind, data: @data)
    collision = validate_time()
    unless collision.nil?
      raise ActivityOverlapError.new "activity overlaps existing at #{collision}"
    end

    @updated_at = Time.now.to_nsec_from_epoch
    add_event(status: 'created')
    Store.zadd(@primary_key, @start, JSON.generate(self.as_json(:allow_nan => true)))
    notify(kind: 'created')
  end
end

#destroy(recurring: false) ⇒ Object

destroy the activity from the redis database



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# File 'lib/openc3/models/activity_model.rb', line 357

def destroy(recurring: false)
  # Delete all recurring activities
  if recurring and @recurring['end'] and @recurring['uuid']
    uuid = @recurring['uuid']
    array = Store.zrangebyscore("#{scope}#{PRIMARY_KEY}__#{@name}", @recurring['start'], @recurring['end'])
    array.each do |value|
      model = ActivityModel.from_json(value, name: @name, scope: @scope)
      if model.recurring['uuid'] == uuid
        Store.zremrangebyscore(@primary_key, model.start, model.start)
      end
    end
  else
    Store.zremrangebyscore(@primary_key, @start, @start)
  end
  notify(kind: 'deleted')
end

#notify(kind:, extra: nil) ⇒ Object

update the redis stream / timeline topic that something has changed



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# File 'lib/openc3/models/activity_model.rb', line 375

def notify(kind:, extra: nil)
  notification = {
    'data' => JSON.generate(as_json(:allow_nan => true)),
    'kind' => kind,
    'type' => 'activity',
    'timeline' => @name
  }
  notification['extra'] = extra unless extra.nil?
  begin
    TimelineTopic.write_activity(notification, scope: @scope)
  rescue StandardError => e
    raise ActivityError.new "Failed to write to stream: #{notification}, #{e}"
  end
end

#set_input(start:, stop:, kind: nil, data: nil, events: nil, fulfillment: nil, recurring: nil) ⇒ Object

Set the values of the instance, @start, @kind, @data, @events…



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# File 'lib/openc3/models/activity_model.rb', line 222

def set_input(start:, stop:, kind: nil, data: nil, events: nil, fulfillment: nil, recurring: nil)
  kind = kind.to_s.downcase
  validate_input(start: start, stop: stop, kind: kind, data: data)
  @start = start
  @stop = stop
  @fulfillment = fulfillment.nil? ? false : fulfillment
  @kind = kind
  @data = data.nil? ? @data : data
  @events = events.nil? ? Array.new : events
  @recurring = recurring.nil? ? @recurring : recurring
end

#update(start:, stop:, kind:, data:) ⇒ Object

Update the Redis hash at primary_key and remove the current activity at the current score and update the score to the new score equal to the start Epoch time this uses a multi to execute both the remove and create.



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# File 'lib/openc3/models/activity_model.rb', line 303

def update(start:, stop:, kind:, data:)
  array = Store.zrangebyscore(@primary_key, @start, @start)
  if array.length == 0
    raise ActivityError.new "failed to find activity at: #{@start}"
  end

  old_start = @start
  set_input(start: start, stop: stop, kind: kind, data: data, events: @events)
  @updated_at = Time.now.to_nsec_from_epoch
  # copy of create
  collision = validate_time(old_start)
  unless collision.nil?
    raise ActivityOverlapError.new "failed to update #{old_start}, no activities can overlap, collision: #{collision}"
  end

  add_event(status: 'updated')
  Store.multi do |multi|
    multi.zremrangebyscore(@primary_key, old_start, old_start)
    multi.zadd(@primary_key, @start, JSON.generate(self.as_json(:allow_nan => true)))
  end
  notify(kind: 'updated', extra: old_start)
  return @start
end

#validate_input(start:, stop:, kind:, data:) ⇒ Object

validate the input to the rules we have created for timelines.

  • A task’s start MUST NOT be in the past.

  • A task’s start MUST be before the stop.

  • A task CAN NOT be longer than MAX_DURATION (86400) in seconds.

  • A task MUST have a kind.

  • A task MUST have a data object/hash.



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# File 'lib/openc3/models/activity_model.rb', line 193

def validate_input(start:, stop:, kind:, data:)
  begin
    DateTime.strptime(start.to_s, '%s')
    DateTime.strptime(stop.to_s, '%s')
  rescue Date::Error
    raise ActivityInputError.new "start and stop must be seconds: #{start}, #{stop}"
  end
  now_i = Time.now.to_i
  begin
    duration = stop - start
  rescue NoMethodError
    raise ActivityInputError.new "start and stop must be seconds: #{start}, #{stop}"
  end
  if now_i >= start and kind != 'expire'
    raise ActivityInputError.new "activity must be in the future, current_time: #{now_i} vs #{start}"
  elsif duration >= MAX_DURATION and kind != 'expire'
    raise ActivityInputError.new "activity can not be longer than #{MAX_DURATION} seconds"
  elsif duration <= 0
    raise ActivityInputError.new "start: #{start} must be before stop: #{stop}"
  elsif !VALID_KINDS.include?(kind)
    raise ActivityInputError.new "unknown kind: #{kind}, must be one of #{VALID_KINDS.join(', ')}"
  elsif data.nil?
    raise ActivityInputError.new "data must not be nil: #{data}"
  elsif data.is_a?(Hash) == false
    raise ActivityInputError.new "data must be a json object/hash: #{data}"
  end
end

#validate_time(ignore_score = nil) ⇒ Object

validate_time searches from the current activity @stop - 1 (because we allow overlap of stop with start) back through @start - MAX_DURATION. The method is trying to validate that this new activity does not overlap with anything else. The reason we search back past @start through MAX_DURATION is because we need to return all the activities that may start before us and verify that we don’t overlap them. Activities are only inserted by @start time so we need to go back to verify we don’t overlap existing @stop. Note: Score is the Seconds since the Unix Epoch: (%s) Number of seconds since 1970-01-01 00:00:00 UTC. zrange rev byscore finds activites from in reverse order so the first task is the closest task to the current score. In this case a parameter ignore_score allows the request to ignore that time and skip to the next time but if nothing is found in the time range we can return nil.

Parameters:

  • ignore_score (Integer) (defaults to: nil) —

    • should be nil unless you want to ignore a time when doing an update



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# File 'lib/openc3/models/activity_model.rb', line 172

def validate_time(ignore_score = nil)
  array = Store.zrevrangebyscore(@primary_key, @stop - 1, @start - MAX_DURATION)
  array.each do |value|
    activity = JSON.parse(value, :allow_nan => true, :create_additions => true)
    if ignore_score == activity['start']
      next
    elsif activity['stop'] > @start
      return activity['start']
    else
      return nil
    end
  end
  return nil
end