Module: Kernel

Defined in:
lib/ext/kernel.rb

Instance Method Summary collapse

Instance Method Details

#each_with_progress(collection) ⇒ Object

Is good for rake tasks, migrations etc.



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/ext/kernel.rb', line 26

def each_with_progress(collection)
  progress = 0

  all_count = collection.count
  puts_with_time "Found before: #{all_count} items."
  i = 0

  collection.find_each(batch_size: 1000) do |item|
    yield item

    i = i + 1

    current_progress = ((i * 100) / all_count.to_f).floor
    if current_progress > progress
      progress = current_progress
      puts_with_time "Done #{progress}%. #{i} of #{all_count} records."
    end

  end

  puts_with_time "Left after: #{collection.count} items."
end

#puts_with_time(string) ⇒ Object 



49
50
51
 
# File 'lib/ext/kernel.rb', line 49

def puts_with_time(string)
  puts "#{Time.now.utc.strftime('%F %T(%Z)')}. #{string}"
end

#track_time {|block| ... } ⇒ Object

returns spent time in milliseconds

Yields:

  • (block) 


19
20
21
22
23
 
# File 'lib/ext/kernel.rb', line 19

def track_time(&block)
  start = Time.now
  yield block
  (Time.now - start).round(3) * 1000
end

#try_to(attempt = 1, &block) ⇒ Object

retrying code ‘attempt’ times with delay ‘attempt’ ** 2. If last attempt failed - returns nil.



4
5
6
7
8
9
10
11
12
13
14
15
16
 
# File 'lib/ext/kernel.rb', line 4

def try_to(attempt = 1, &block)
  begin
    yield
  rescue => exception
    if attempt < 5
      sleep(attempt ** 2)
      try_to(attempt + 1, &block)
    else
      Airbrake.notify(exception, error_message: "Exception from try_to block: #{exception.message}")
      return nil
    end
  end
end