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author | Jeremy Kemper <jeremy@bitsweat.net> | 2006-06-19 22:48:51 +0000 |
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committer | Jeremy Kemper <jeremy@bitsweat.net> | 2006-06-19 22:48:51 +0000 |
commit | 15aa6e05528019fbf62e1a5cbd2398a2205af8bb (patch) | |
tree | 6cdedee3b5f3ef0a075e55c85e3bc4607c43a3e0 /activerecord/lib/active_record/transactions.rb | |
parent | e5fc5aaffe0d97b73678d7edfcaca222f01aba69 (diff) | |
download | rails-15aa6e05528019fbf62e1a5cbd2398a2205af8bb.tar.gz rails-15aa6e05528019fbf62e1a5cbd2398a2205af8bb.tar.bz2 rails-15aa6e05528019fbf62e1a5cbd2398a2205af8bb.zip |
r4644@asus: jeremy | 2006-06-16 14:57:03 -0700
locking
r4645@asus: jeremy | 2006-06-17 12:41:30 -0700
missing reply fixture
r4646@asus: jeremy | 2006-06-19 13:05:23 -0700
Use a per-thread (rather than global) transaction mutex so you may execute concurrent transactions on separate connections.
r4647@asus: jeremy | 2006-06-19 13:07:23 -0700
PostgreSQL: introduce allow_concurrency option which determines whether to use blocking or asynchronous #execute. Adapters with blocking #execute will deadlock Ruby threads. The default value is ActiveRecord::Base.allow_concurrency.
r4648@asus: jeremy | 2006-06-19 13:08:40 -0700
Pass the default allow_concurrency when instantiating new connections.
r4649@asus: jeremy | 2006-06-19 13:11:12 -0700
Break out concurrent transaction tests and run them for PostgreSQLAdapter only (need to fork or system('some_test_script') for the other adapters)
r4650@asus: jeremy | 2006-06-19 13:42:48 -0700
Row locking. Provide a locking clause with the :lock finder option or true for the default "FOR UPDATE".
r4661@asus: jeremy | 2006-06-19 15:36:51 -0700
excise the junk mutex
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4460 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activerecord/lib/active_record/transactions.rb')
-rw-r--r-- | activerecord/lib/active_record/transactions.rb | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb index c222e18097..5e82fd2d8e 100644 --- a/activerecord/lib/active_record/transactions.rb +++ b/activerecord/lib/active_record/transactions.rb @@ -4,8 +4,6 @@ require 'thread' module ActiveRecord module Transactions # :nodoc: - TRANSACTION_MUTEX = Mutex.new - class TransactionError < ActiveRecordError # :nodoc: end @@ -79,8 +77,8 @@ module ActiveRecord module ClassMethods def transaction(*objects, &block) previous_handler = trap('TERM') { raise TransactionError, "Transaction aborted" } - lock_mutex - + increment_open_transactions + begin objects.each { |o| o.extend(Transaction::Simple) } objects.each { |o| o.start_transaction } @@ -93,22 +91,21 @@ module ActiveRecord objects.each { |o| o.abort_transaction } raise ensure - unlock_mutex + decrement_open_transactions trap('TERM', previous_handler) end end - - def lock_mutex#:nodoc: - Thread.current['open_transactions'] ||= 0 - TRANSACTION_MUTEX.lock if Thread.current['open_transactions'] == 0 - Thread.current['start_db_transaction'] = (Thread.current['open_transactions'] == 0) - Thread.current['open_transactions'] += 1 - end - - def unlock_mutex#:nodoc: - Thread.current['open_transactions'] -= 1 - TRANSACTION_MUTEX.unlock if Thread.current['open_transactions'] == 0 - end + + private + def increment_open_transactions #:nodoc: + open = Thread.current['open_transactions'] ||= 0 + Thread.current['start_db_transaction'] = open.zero? + Thread.current['open_transactions'] = open + 1 + end + + def decrement_open_transactions #:nodoc: + Thread.current['open_transactions'] -= 1 + end end def transaction(*objects, &block) |