Class: BackgroundQueue::ServerLib::WorkerThread

Inherits:
Object
  • Object
show all
Defined in:
lib/background_queue/server_lib/worker_thread.rb

Overview

A Thread that processes the task queue

Instance Method Summary collapse

Constructor Details

#initialize(server) ⇒ WorkerThread

Returns a new instance of WorkerThread.



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# File 'lib/background_queue/server_lib/worker_thread.rb', line 6

def initialize(server)
  @server = server
end

Instance Method Details

#build_client ⇒ Object 



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# File 'lib/background_queue/server_lib/worker_thread.rb', line 19

def build_client
  BackgroundQueue::ServerLib::WorkerClient.new(@server)
end

#call_worker(task) ⇒ Object 



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# File 'lib/background_queue/server_lib/worker_thread.rb', line 23

def call_worker(task)
  @server.change_stat(:tasks, -1)
  @server.change_stat(:running, 1)
  @server.logger.debug("calling worker for task #{task.id}")
  error_count = 0
  while @server.running?
    worker = @server.workers.get_next_worker
    if worker.nil?
      Kernel.sleep(1) unless !@server.running?
    else
      client = build_client
      result = client.send_request(worker, task, @server.config.secret)
      if result == :ok
        @server.logger.debug("called worker for task #{task.id}")
        @server.workers.finish_using_worker(worker, true)
        @server.task_queue.finish_task(task)
        @server.change_stat(:running, -1)
        @server.change_stat(:run_tasks, 1)
        return true
      else
        @server.logger.debug("failed calling worker for task #{task.id}")
        @server.workers.finish_using_worker(worker, result == :worker_error)
        @server.task_queue.add_task_to_error_list(task)
        return result != :stop
        #error_count += 1
        #if error_count > 5
        #  @server.logger.debug("error count exceeded for task #{task.id}, returning to queue")
        #  @server.task_queue.finish_task(task)
        #  @server.task_queue.add_task(task)
        #  return true
        #end
      end
    end
  end
  #if we get here the server stopped before we could do the task... put it back so it can be saved to disk...
  @server.logger.debug("returning task #{task.id} to queue because the server has stopped")
  @server.task_queue.finish_task(task)
  @server.task_queue.add_task(task)
  
  false
end

#get_next_task ⇒ Object 



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# File 'lib/background_queue/server_lib/worker_thread.rb', line 10

def get_next_task
  task = nil
  while @server.running? && task.nil?
    task = @server.task_queue.next_task
  end
  task = nil if task.nil? || !@server.running? #if the server isnt running, dont continue to process a task
  task
end

#run ⇒ Object 



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# File 'lib/background_queue/server_lib/worker_thread.rb', line 65

def run
  while @server.running?
    task = get_next_task
    call_worker(task) unless task.nil?
  end
end