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author | Yehuda Katz + Carl Lerche <ykatz+clerche@engineyard.com> | 2009-09-24 14:01:31 -0700 |
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committer | Yehuda Katz + Carl Lerche <ykatz+clerche@engineyard.com> | 2009-09-24 16:11:41 -0700 |
commit | f0dd77c6be6a86fe384bb0015151e0a497973d39 (patch) | |
tree | ad81bb4c807c39edeaa37035882a16d9d95ebaa9 /railties/lib/rails/commands/ncgi/tracker | |
parent | 610b81beca461a6fa4f00c7023e0e4315eb2b8be (diff) | |
download | rails-f0dd77c6be6a86fe384bb0015151e0a497973d39.tar.gz rails-f0dd77c6be6a86fe384bb0015151e0a497973d39.tar.bz2 rails-f0dd77c6be6a86fe384bb0015151e0a497973d39.zip |
Move railties/lib/* into railties/lib/*
Diffstat (limited to 'railties/lib/rails/commands/ncgi/tracker')
-rwxr-xr-x | railties/lib/rails/commands/ncgi/tracker | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/railties/lib/rails/commands/ncgi/tracker b/railties/lib/rails/commands/ncgi/tracker new file mode 100755 index 0000000000..4ca12d779b --- /dev/null +++ b/railties/lib/rails/commands/ncgi/tracker @@ -0,0 +1,69 @@ +#!/usr/bin/env ruby + +require 'drb' +require 'thread' + +def message(s) + $stderr.puts "tracker: #{s}" if ENV && ENV["DEBUG_GATEWAY"] +end + +class Tracker + include DRbUndumped + + def initialize(instances, socket_path) + @instances = instances + @socket = File.expand_path(socket_path) + @active = false + + @listeners = [] + @instances.times { @listeners << Mutex.new } + + message "using #{@listeners.length} listeners" + message "opening socket at #{@socket}" + + @service = DRb.start_service("drbunix://#{@socket}", self) + end + + def with_listener + message "listener requested" + + mutex = has_lock = index = nil + 3.times do + @listeners.each_with_index do |mutex, index| + has_lock = mutex.try_lock + break if has_lock + end + break if has_lock + sleep 0.05 + end + + if has_lock + message "obtained listener #{index}" + @active = true + begin yield index + ensure + mutex.unlock + message "released listener #{index}" + end + else + message "dropping request because no listeners are available!" + end + end + + def background(check_interval = nil) + if check_interval + loop do + sleep check_interval + message "Idle for #{check_interval}, shutting down" unless @active + @active = false + Kernel.exit 0 + end + else DRb.thread.join + end + end +end + +socket_path = ARGV.shift +instances = ARGV.shift.to_i +t = Tracker.new(instances, socket_path) +t.background(ARGV.first ? ARGV.shift.to_i : 90) |