Class: Jober::ARLoop

Inherits:
Task show all
Defined in:
lib/jober/ar_loop.rb

Instance Attribute Summary

Attributes inherited from AbstractTask

#finished, #stopped, #unique_id, #worker_id, #workers_count

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Task

extract_name, inherited, #perform

Methods inherited from AbstractTask

#after_execute, #after_initialize, #before_execute, #execute, get_interval, get_workers, inherited, #initialize, interval, manual!, manual?, #on_crashed, #run_loop, #sleeping, #stop!, workers

Methods included from Exception

#catch, #exception

Methods included from Logger

#logger, #logger=, #logger_tag

Constructor Details

This class inherits a constructor from Jober::AbstractTask

Class Method Details

.batch_size(bs) ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 3

def batch_size(bs)
  @batch_size = bs
end

.get_batch_size ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 7

def get_batch_size
  @batch_size ||= 1000
end

Instance Method Details

#log_prefix ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 67

def log_prefix
  ''
end

#proxy ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 12

def proxy
  raise "implement me, should return AR.proxy, ex: User.where('years > 18')"
end

#reset_last_batch_id ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 75

def reset_last_batch_id
  Jober.redis.del(store_key('lastbatch'))
end

#run ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 16

def run
  prox = proxy

  prefix = log_prefix

  if @worker_id && @workers_count && @workers_count > 1 && !@opts[:no_auto_proxy]
    cond = "id % #{@workers_count} = #{@worker_id}"
    prox = prox.where(cond)
    prefix += "(#{cond}) "
    info { "sharding enabled '#{cond}'" }
  end

  last_batch_id = if (_last_batch_id = get_store("lastbatch")) && !@opts[:no_last_batch]
    info { "Finded last_batch_id #{_last_batch_id} so start with it!" }
    prefix += "(#{_last_batch_id}:) "
    _last_batch_id
  end

  if @opts[:where]
    prox = prox.where(@opts[:where])
    prefix += "(cwhere) "
  end

  cnt = 0
  count = last_batch_id ? prox.where("id > ?", last_batch_id).count : prox.count
  info { "#{prefix}full count to process #{count}" }

  h = { :batch_size => self.class.get_batch_size }
  h[:start] = last_batch_id + 1 if last_batch_id

  t1 = Time.now
  prox.find_in_batches(h) do |batch|
    t = Time.now

    res = perform(batch)
    cnt += batch.size

    select_time = t - t1
    t1 = Time.now
    process_time = t1 - t

    info { "#{prefix}process batch #{res.inspect} | #{cnt} from #{count} | lastid: #{batch.last.id} (#{format("%.1f", select_time)}s, #{format("%.1f", process_time)}s)" }
    set_store("lastbatch", batch.last.id)
    break if stopped
  end

  reset_last_batch_id unless stopped

  info { "#{prefix}processed total #{cnt} #{summary_info}" }
end

#summary_info ⇒ Object 



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# File 'lib/jober/ar_loop.rb', line 71

def summary_info
  nil
end