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# frozen_string_literal: true
module Clusters
class AgentToken < ApplicationRecord
include RedisCacheable
include TokenAuthenticatable
add_authentication_token_field :token, encrypted: :required, token_generator: -> { Devise.friendly_token(50) }
cached_attr_reader :last_contacted_at
self.table_name = 'cluster_agent_tokens'
# The `UPDATE_USED_COLUMN_EVERY` defines how often the token DB entry can be updated
UPDATE_USED_COLUMN_EVERY = (40.minutes..55.minutes).freeze
belongs_to :agent, class_name: 'Clusters::Agent', optional: false
belongs_to :created_by_user, class_name: 'User', optional: true
before_save :ensure_token
validates :description, length: { maximum: 1024 }
validates :name, presence: true, length: { maximum: 255 }
def track_usage
track_values = { last_used_at: Time.current.utc }
cache_attributes(track_values)
# Use update_column so updated_at is skipped
update_columns(track_values) if can_update_track_values?
end
private
def can_update_track_values?
# Use a random threshold to prevent beating DB updates.
last_used_at_max_age = Random.rand(UPDATE_USED_COLUMN_EVERY)
real_last_used_at = read_attribute(:last_used_at)
# Handle too many updates from high token traffic
real_last_used_at.nil? ||
(Time.current - real_last_used_at) >= last_used_at_max_age
end
end
end
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