Module: HybridStateModel::Metrics

Defined in:
lib/hybrid_state_model/metrics.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 7

def self.included(base)
  base.extend(ClassMethods)
end

Instance Method Details

#current_state_duration ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 104

def current_state_duration
  return 0 unless persisted?

  current_primary = primary_state_value
  return 0 unless current_primary

  metrics = state_metrics_hash[current_primary.to_s] || {}
  entered_at = metrics["entered_at"]

  return 0 unless entered_at

  base_duration = metrics["duration"] || 0
  time_since_entry = Time.now - Time.parse(entered_at)
  base_duration + time_since_entry
end

#record_state_metrics ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 25

def record_state_metrics
  return unless @state_changed

  metrics = state_metrics_hash
  current_time = Time.now

  # Record exit time for old state
  if @old_primary
    metrics[@old_primary.to_s] ||= {}
    metrics[@old_primary.to_s]["exited_at"] ||= current_time.iso8601
    metrics[@old_primary.to_s]["duration"] ||= 0
    if metrics[@old_primary.to_s]["entered_at"]
      duration = current_time - Time.parse(metrics[@old_primary.to_s]["entered_at"])
      metrics[@old_primary.to_s]["duration"] += duration
    end
  end

  # Record entry time for new state
  new_primary = primary_state_value
  if new_primary
    metrics[new_primary.to_s] ||= {}
    metrics[new_primary.to_s]["entered_at"] = current_time.iso8601
    metrics[new_primary.to_s]["duration"] ||= 0
  end

  # Record micro state metrics
  if @old_micro && @old_primary
    micro_key = "#{@old_primary}:#{@old_micro}"
    metrics[micro_key] ||= {}
    metrics[micro_key]["exited_at"] ||= current_time.iso8601
    if metrics[micro_key]["entered_at"]
      duration = current_time - Time.parse(metrics[micro_key]["entered_at"])
      metrics[micro_key]["duration"] ||= 0
      metrics[micro_key]["duration"] += duration
    end
  end

  if micro_state_value && new_primary
    micro_key = "#{new_primary}:#{micro_state_value}"
    metrics[micro_key] ||= {}
    metrics[micro_key]["entered_at"] = current_time.iso8601
    metrics[micro_key]["duration"] ||= 0
  end

  # Store metrics if column exists
  if self.class.has_state_metrics?
    self.state_metrics = metrics.to_json
  end

  @state_changed = false
end

#state_metrics ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 77

def state_metrics
  return {} unless self.class.has_state_metrics?

  json = read_attribute(:state_metrics)
  return {} if json.blank?

  JSON.parse(json)
rescue JSON::ParserError
  {}
end

#state_metrics_hash ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 88

def state_metrics_hash
  state_metrics
end

#time_in_micro_state(primary_state, micro_state) ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 98

def time_in_micro_state(primary_state, micro_state)
  key = "#{primary_state}:#{micro_state}"
  metrics = state_metrics_hash[key] || {}
  metrics["duration"] || 0
end

#time_in_primary_state(state = nil) ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 92

def time_in_primary_state(state = nil)
  state ||= primary_state_value
  metrics = state_metrics_hash[state.to_s] || {}
  metrics["duration"] || 0
end

#track_state_changes ⇒ Object 



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# File 'lib/hybrid_state_model/metrics.rb', line 17

def track_state_changes
  return unless persisted?

  @state_changed = primary_state_changed? || micro_state_changed?
  @old_primary = primary_state_was if primary_state_changed?
  @old_micro = micro_state_was if micro_state_changed?
end