canvas-lms/lib/timed_cache.rb

37 lines
1007 B
Ruby

# frozen_string_literal: true
#
# Copyright (C) 2014 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
class TimedCache
def initialize(timeout, &block)
@timeout = timeout
@block = block
@cached_at = Time.now
end
def clear(force = false)
if force || @cached_at < @timeout.call()
@block.call()
@cached_at = Time.now
true
else
false
end
end
end