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|
# frozen_string_literal: true
require 'thread'
module Aws
# Module/mixin used by token provider classes that can be refreshed. This
# provides basic refresh logic in a thread-safe manner. Classes mixing in
# this module are expected to implement a #refresh method that populates
# the following instance variable:
#
# * `@token` [Token] - {Aws::Token} object with the `expiration` and `token`
# fields set.
#
# @api private
module RefreshingToken
def initialize(options = {})
@mutex = Mutex.new
@before_refresh = options.delete(:before_refresh) if Hash === options
@before_refresh.call(self) if @before_refresh
refresh
end
# @return [Token]
def token
refresh_if_near_expiration
@token
end
# @return [Time,nil]
def expiration
refresh_if_near_expiration
@expiration
end
# Refresh token.
# @return [void]
def refresh!
@mutex.synchronize do
@before_refresh.call(self) if @before_refresh
refresh
end
end
private
# Refreshes token if it is within
# 5 minutes of expiration.
def refresh_if_near_expiration
if near_expiration?
@mutex.synchronize do
if near_expiration?
@before_refresh.call(self) if @before_refresh
refresh
end
end
end
end
def near_expiration?
if @token && @token.expiration
# are we within 5 minutes of expiration?
(Time.now.to_i + 5 * 60) > @token.expiration.to_i
else
true
end
end
end
end
|
