Module: Waxx::Supervisor

Extended by:
Supervisor
Included in:
Supervisor
Defined in:
waxx/supervisor.rb

Overview

Supervises the thread pool

Instance Method Summary collapse

Instance Method Details

#check ⇒ Object

Check the thread pool and add or remove threads



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# File 'waxx/supervisor.rb', line 10

def check
  start_threads = Waxx['server']['min_threads'] || Waxx['server']['threads']
  max_threads = Waxx['server']['max_threads'] || Waxx['server']['threads']
  idle_thread_timeout = Waxx['server']['idle_thread_timeout'] || 600
  ts = Thread.list.select{|t| t[:name] =~ /waxx/}
  Waxx.debug "Supervisor.check_threads: #{ts.size}", 5
  # Ensure the minimum threads
  if ts.size < start_threads
    0.upto(start_threads - ts.size).each do |i|
      Waxx::Server.create_thread(i)
    end
  end
  # If no idle threads add more (up-to max)
  if ts.size < max_threads
    idle_count = 0
    ts.each{|t|
      idle_count += 1 if t[:status] == 'idle'
    }
    if idle_count == 0
      Waxx::Server.create_thread(1)
    end
  end
  # Terminate old threads
  ts.each{|t|
    if ts.size > start_threads
      if Time.new.to_i - t[:last_used].to_i > idle_thread_timeout and t[:status] == 'idle' and Thread.current != t
        Waxx.debug "Terminate expired thread #{t[:name]}", 3
        Waxx['databases'].each{|n,v|
          t[:db][n.to_sym].close rescue "already closed"
        }
        t.exit
        ts.delete t
      end
    end
  }
end