@@ -45,3 +45,7 @@ v0.7 - 2008/04/24 v0.8 - 2008/05/02 * call exit! within the ensure block so that at_exit handlers aren't called on exceptions * set logger from RAILS_DEFAULT_LOGGER if available, else STDERR + +-------------------------------------------------- +v0.9 - 2008/05/11 +* added ability to set nice level for child process CHANGELOG @@ -36,6 +36,13 @@ spawn to Spawn::wait(), like this: # wait for all N blocks of code to finish running wait(spawn_ids) +If you want your forked child to run at a lower priority than the parent process, pass in +the :nice option like this: + + spawn(:nice => 7) do + do_something_nicely + end + By default, spawn will use the fork to spawn child processes. You can configure it to do threading either by telling the spawn method when you call it or by configuring your environment. @@ -104,7 +111,7 @@ blog post on threading in rails. http://bibwild.wordpress.com/2007/08/28/threading-in-rails/ Also thanks to all who have helped debug problems and suggest improvements including: - Ahmed Adam, Tristan Schneiter, Scott Haug, Andrew Garfield, Eugene Otto, <your name here> - + Ahmed Adam, Tristan Schneiter, Scott Haug, Andrew Garfield, Eugene Otto, Dan Sharp, + <your name here> Copyright (c) 2007-08 Tom Anderson (tom@squeat.com), see LICENSE README @@ -87,12 +87,18 @@ module Spawn begin start = Time.now @@logger.debug "spawn> child PID = #{Process.pid}" + + # set the nice priority if needed + Process.setpriority(Process::PRIO_PROCESS, 0, options[:nice]) if options[:nice] + # disconnect from the listening socket, et al Spawn.close_resources # get a new connection so the parent can keep the original one ActiveRecord::Base.spawn_reconnect + # run the block of code that takes so long yield + rescue => ex @@logger.error "spawn> Exception in child[#{Process.pid}] - #{ex.class}: #{ex.message}" ensure lib/spawn.rb a3aa889cdc28ab31b38b61df93801edfe2a66551 tra tra@2aabfe31-cc40-457c-aec7-21ad9ce7fb7d http://github.com/tra/spawn/commit/c525078436ae427e3615092952cc811f75206759 c525078436ae427e3615092952cc811f75206759 2008-05-11T12:38:13-07:00 2008-05-11T12:38:13-07:00 added :nice option git-svn-id: svn+ssh://rubyforge.org/var/svn/spawn/spawn@19 2aabfe31-cc40-457c-aec7-21ad9ce7fb7d ce35599123093902438fda45314d6c58a9a2b0b7 tra tra@2aabfe31-cc40-457c-aec7-21ad9ce7fb7d