Class: ProcessPool

Inherits:
Object
  • Object
show all
Defined in:
lib/process_pool.rb

Instance Method Summary collapse

Constructor Details

#initialize(controller) ⇒ ProcessPool

Returns a new instance of ProcessPool.



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# File 'lib/process_pool.rb', line 4

def initialize(controller)
  @controller = controller
  @active_processes = 0
  @started_count = 0
  @ended_count = 0
  @errors = 0
end

Instance Method Details

#progress ⇒ Object 



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# File 'lib/process_pool.rb', line 67

def progress

   @controller.progress({
  :active_processes => @active_processes, 
  :processes_started => @started_count, 
  :processes_ended => @ended_count, 
  :errors => @errors
   })
end

#run ⇒ Object 



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# File 'lib/process_pool.rb', line 13

def run

  progress

  while @controller.running?

    num_processes = @controller.num_processes

    # Create processes
    while @active_processes < num_processes

      @controller.info "num_proceses #{num_processes}, active_processes #{@active_processes}; forking"

  pid = Process.fork do
        @controller.run_process
  end


  @active_processes = @active_processes + 1
  @controller.process_started(pid, @active_processes)
  @started_count = @started_count + 1
  
  progress
    end

    doneWaiting = false
    while ! doneWaiting 
     begin
pidStatus = Process.wait2(-1, Process::WNOHANG)
if pidStatus != nil
         @controller.process_ended(pidStatus[0], pidStatus[1].exitstatus)
  @active_processes = @active_processes - 1 
  @ended_count = @ended_count + 1
         if pidStatus[1].exitstatus != 0 
           @errors = @errors + 1
         end
else 
  doneWaiting = true
end
     rescue => e
doneWaiting = true
#@controller.info "Exception #{e}"
     end
   end

   progress

   sleep @controller.delay

  end
  @controller.finished

end