module Eye::Process::Watchers
Public Instance Methods
add_watchers(force = false)
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# File lib/eye/process/watchers.rb, line 3 def add_watchers(force = false) return unless self.up? remove_watchers if force if @watchers.blank? # default watcher :check_alive add_watcher(:check_alive, self[:check_alive_period]) do check_alive end # monitor children pids if self[:monitor_children] add_watcher(:check_children, self[:children_update_period]) do add_or_update_children end end # monitor conditional watchers start_checkers else warn 'add_watchers failed, watchers are already present' end end
remove_watchers()
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# File lib/eye/process/watchers.rb, line 28 def remove_watchers @watchers.each{|_, h| h[:timer].cancel } @watchers = {} end
Private Instance Methods
add_watcher(type, period = 2, subject = nil, &block)
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# File lib/eye/process/watchers.rb, line 35 def add_watcher(type, period = 2, subject = nil, &block) return if @watchers[type] debug "adding watcher: #{type}(#{period})" timer = every(period.to_f) do debug "check #{type}" block.call(subject) end @watchers[type] ||= {:timer => timer, :subject => subject} end
start_checker(name, cfg)
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# File lib/eye/process/watchers.rb, line 52 def start_checker(name, cfg) subject = Eye::Checker.create(pid, cfg, current_actor) # ex: {:type => :memory, :every => 5.seconds, :below => 100.megabytes, :times => [3,5]} add_watcher("check_#{name}".to_sym, subject.every, subject, &method(:watcher_tick).to_proc) if subject end
start_checkers()
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# File lib/eye/process/watchers.rb, line 48 def start_checkers self[:checks].each{|name, cfg| start_checker(name, cfg) } end
watcher_tick(subject)
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# File lib/eye/process/watchers.rb, line 59 def watcher_tick(subject) unless subject.check return unless up? subject.fire end end