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# encoding: binary # Phusion Passenger - https://www.phusionpassenger.com/ # Copyright (c) 2012-2025 Asynchronous B.V. # # "Passenger", "Phusion Passenger" and "Union Station" are registered # trademarks of Asynchronous B.V. # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. require 'thread' module PhusionPassenger module Rack class OutOfBandGc # Usage: # # OutOfBandGc.new(app, frequency, logger = nil) # OutOfBandGc.new(app, options = {}) def initialize(app, args) @app = app if args.size == 0 \|\| (args.size == 1 && args[0].is_a?(Hash)) # OutOfBandGc.new(app, options = {}) initialize_with_options(args[0] \|\| {}) else # OutOfBandGc.new(app, frequency, logger = nil) initialize_legacy(args) end end def call(env) status, headers, body = @app.call(env) case @strategy when :counting @mutex.synchronize do @request_count += 1 if @request_count == @frequency @request_count = 0 headers['!~Request-OOB-Work'] = 'true' end end when :gctools_oobgc if GC::OOB.dry_run headers['!~Request-OOB-Work'] = 'true' end else raise "Unrecognized Out-Of-Band GC strategy #{@strategy.inspect}" end [status, headers, body] end private def initialize_with_options(options) @strategy = options[:strategy] @logger = options[:logger] case @strategy when :counting @frequency = options[:frequency] @request_count = 0 @mutex = Mutex.new if !@frequency \|\| @frequency < 1 raise ArgumentError, "The :frequency option must be a number that is at least 1." end ::PhusionPassenger.on_event(:oob_work) do t0 = Time.now disabled = GC.enable GC.start GC.disable if disabled @logger.info "Out Of Band GC finished in #{Time.now - t0} sec" if @logger end when :gctools_oobgc if !defined?(::GC::OOB) raise "To use the :gctools_oobgc strategy, " + "first add 'gem \"gctools\"' to your Gemfile, " + "then call 'require \"gctools/oobgc\"' and 'GC::OOB.setup' " + "before using the #{self.class.name} middleware." elsif !::GC::OOB.respond_to?(:dry_run) raise "To use the :gctools_oobgc strategy, you must use a sufficiently " + "recent version of the gctools gem. Please see this pull request: " + "https://github.com/tmm1/gctools/pull/5" elsif PhusionPassenger::App.options["spawn_method"] =~ /smart/ # Using GC::OOB with 'smart' currently results in a segfault. raise "The :gctools_oobgc strategy cannot be used with the '" + PhusionPassenger::App.options["spawn_method"] + "' spawning method. " + "Please use 'direct'." end ::PhusionPassenger.on_event(:oob_work) do t0 = Time.now GC::OOB.run @logger.info "Out Of Band GC finished in #{Time.now - t0} sec" if @logger end when nil raise ArgumentError, "You must specify an Out-Of-Band GC strategy with the :strategy option." else raise ArgumentError, "Invalid Out-Of-Band GC strategy #{@strategy.inspect}" end end def initialize_legacy(frequency, logger = nil) initialize_with_options( :strategy => :counting, :frequency => frequency, :logger => logger) end end end # module Rack end # module PhusionPassenger