Updating to use Rails 2.1.2. Moving the gem dependancies to the config/environment.rb file. Moving the vendor/plugins externals into our svn.

vendor/plugins/deadlock_retry/lib/deadlock_retry.rb

@@ -0,0 +1,58 @@
+# Copyright (c) 2005 Jamis Buck
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+module DeadlockRetry
+  def self.append_features(base)
+    super
+    base.extend(ClassMethods)
+    base.class_eval do
+      class <<self
+        alias_method :transaction_without_deadlock_handling, :transaction
+        alias_method :transaction, :transaction_with_deadlock_handling
+      end
+    end
+  end
+
+  module ClassMethods
+    DEADLOCK_ERROR_MESSAGES = [
+      "Deadlock found when trying to get lock",
+      "Lock wait timeout exceeded"
+    ]
+
+    MAXIMUM_RETRIES_ON_DEADLOCK = 3
+
+    def transaction_with_deadlock_handling(*objects, &block)
+      retry_count = 0
+
+      begin
+        transaction_without_deadlock_handling(*objects, &block)
+      rescue ActiveRecord::StatementInvalid => error
+        if DEADLOCK_ERROR_MESSAGES.any? { |msg| error.message =~ /#{Regexp.escape(msg)}/ }
+          raise if retry_count >= MAXIMUM_RETRIES_ON_DEADLOCK
+          retry_count += 1
+          logger.info "Deadlock detected on retry #{retry_count}, restarting transaction"
+          retry
+        else
+          raise
+        end
+      end
+    end
+  end
+end