Class: Isolator::ActiveSupportTransactionSubscriber::Subscriber

Inherits:
Isolator::ActiveSupportSubscriber::Subscriber show all
Defined in:
lib/isolator/orm_adapters/active_support_transaction_subscriber.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Subscriber

Returns a new instance of Subscriber.



9
10
11
 
# File 'lib/isolator/orm_adapters/active_support_transaction_subscriber.rb', line 9

def initialize
  @stacks = Hash.new { |h, k| h[k] = [] }
end

Instance Attribute Details

#stacks ⇒ Object (readonly)

Returns the value of attribute stacks.



7
8
9
 
# File 'lib/isolator/orm_adapters/active_support_transaction_subscriber.rb', line 7

def stacks
  @stacks
end

Instance Method Details

#finish(event, id, payload) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/isolator/orm_adapters/active_support_transaction_subscriber.rb', line 32

def finish(event, id, payload)
  if event.start_with?("sql.")
    if start_event?(payload[:sql])
      connection_id = extract_connection_id(payload)
      stack = stacks[connection_id]

      stack << :raw

      Isolator.incr_transactions!(connection_id)
    end

    if finish_event?(payload[:sql])
      connection_id = extract_connection_id(payload)
      stack = stacks[connection_id]

      # Decrement only if the transaction was started in the raw mode,
      # otherwise we should wait for the "transaction" event
      if stack.last == :raw
        stack.pop
        stacks.delete(connection_id) if stack.empty?

        Isolator.decr_transactions!(connection_id)
      end
    end
  end

  if event.start_with?("transaction.")
    connection_id = extract_transaction_connection_id(payload)
    stack = stacks[connection_id]

    if stack.last == :transaction
      stack.pop
      stacks.delete(connection_id) if stack.empty?

      Isolator.decr_transactions!(connection_id)
    end
  end
end

#start(event, id, payload) ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/isolator/orm_adapters/active_support_transaction_subscriber.rb', line 13

def start(event, id, payload)
  if event.start_with?("transaction.")
    connection_id = extract_transaction_connection_id(payload)
    stack = stacks[connection_id]

    # transaction.active_record can be issued without a query (when we restart the transaction),
    # so we should add a new one on the stack.
    # Example: https://github.com/rails/rails/blob/ce49fa9b31cd4a21d43db39d0cea364bce28b51d/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb#L337
    if stack.last == :raw
      # Update the type of the last transaction event
      stack.pop
      stack << :transaction
    else
      stack << :transaction
      Isolator.incr_transactions!(connection_id)
    end
  end
end