Added rollbacks of transactions if they're active as the dispatcher is killed...

Added rollbacks of transactions if they're active as the dispatcher is killed gracefully (TERM signal) #1054 [Leon Bredt]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1136 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Added rollbacks of transactions if they're active as the dispatcher is killed gracefully (TERM signal) #1054 [Leon Bredt]
+
 * Added quoting of column names for fixtures #997 [jcfischer@gmail.com]
 
 * Fixed counter_sql when no records exist in database for PostgreSQL (would give error, not 0) #1039 [Caleb Tennis]

activerecord/lib/active_record/transactions.rb

@@ -6,6 +6,9 @@ module ActiveRecord
   module Transactions # :nodoc:
     TRANSACTION_MUTEX = Mutex.new
 
+    class TransactionError < ActiveRecordError # :nodoc:
+    end
+
     def self.append_features(base)
       super
       base.extend(ClassMethods)
@@ -78,6 +81,9 @@ def self.append_features(base)
     # Tribute: Object-level transactions are implemented by Transaction::Simple by Austin Ziegler.
     module ClassMethods
       def transaction(*objects, &block)
+        previous_handler = trap('TERM') do
+          raise TransactionError, "Transaction aborted"
+        end
         lock_mutex
         
         begin
@@ -93,6 +99,7 @@ def transaction(*objects, &block)
           raise
         ensure
           unlock_mutex
+          trap('TERM', previous_handler)
         end
       end