Current File : //opt/cpanel/ea-ruby27/root/usr/share/passenger/phusion_passenger/rack/out_of_band_gc.rb
# encoding: binary
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2012-2017 Phusion Holding B.V.
#
# "Passenger", "Phusion Passenger" and "Union Station" are registered
# trademarks of Phusion Holding 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
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