class Merb::Worker

Attributes

thread[RW]

:api: private

Public Class Methods

alive?() click to toggle source

Returns

Whether the Merb::Worker instance thread is alive

:api: private

# File lib/merb-core/dispatch/worker.rb, line 37
def alive?
  started? and @worker.thread.alive?
end
new() click to toggle source

Creates a new worker thread that loops over the work queue.

:api: private

# File lib/merb-core/dispatch/worker.rb, line 60
def initialize
  @thread = Thread.new do
    loop do
      process_queue
      break if Merb::Dispatcher.work_queue.empty? && Merb.exiting
    end
  end
end
restart() click to toggle source

restarts the worker thread

Returns

Merb::Worker

instance of a worker.

:api: private

# File lib/merb-core/dispatch/worker.rb, line 47
def restart
  # if we have a worker or thread, kill it.
  if started?
    @worker.thread.exit
    @worker = nil
  end
  start
end
start() click to toggle source

Returns

Merb::Worker

instance of a worker.

:api: private

# File lib/merb-core/dispatch/worker.rb, line 12
def start
  @worker ||= new
  Merb.at_exit do 
    if Merb::Dispatcher.work_queue.empty?
      @worker.thread.abort_on_exception = false
      @worker.thread.raise
    else
      @worker.thread.join
    end
  end
  @worker
end
started?() click to toggle source

Returns

Whether the Merb::Worker instance is already started.

:api: private

# File lib/merb-core/dispatch/worker.rb, line 29
def started?
  !@worker.nil?
end

Public Instance Methods

process_queue() click to toggle source

Processes tasks in the Merb::Dispatcher.work_queue.

:api: private

# File lib/merb-core/dispatch/worker.rb, line 72
def process_queue
  begin
    while blk = Merb::Dispatcher.work_queue.pop
       # we've been blocking on the queue waiting for an item sleeping.
       # when someone pushes an item it wakes up this thread so we 
       # immediately pass execution to the scheduler so we don't 
       # accidentally run this block before the action finishes 
       # it's own processing
      Thread.pass
      blk.call
      break if Merb::Dispatcher.work_queue.empty? && Merb.exiting
    end
  rescue Exception => e
    Merb.logger.warn! %Q!Worker Thread Crashed with Exception:\n#{Merb.exception(e)}\nRestarting Worker Thread!
    retry
  end
end