Method: ActiveRecord::ConnectionAdapters::ConnectionPool::Queue#poll

Defined in:
lib/active_record/connection_adapters/abstract/connection_pool.rb

#poll(timeout = nil) ⇒ Object

Remove the head of the queue.

If timeout is not given, remove and return the head the queue if the number of available elements is strictly greater than the number of threads currently waiting (that is, don't jump ahead in line). Otherwise, return nil.

If timeout is given, block if it there is no element available, waiting up to timeout seconds for an element to become available.

Raises:

  • ConnectionTimeoutError if timeout is given and no element becomes available after timeout seconds,


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# File 'lib/active_record/connection_adapters/abstract/connection_pool.rb', line 133

def poll(timeout = nil)
  synchronize do
    if timeout
      no_wait_poll || wait_poll(timeout)
    else
      no_wait_poll
    end
  end
end