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|
module ActiveRecord
module ConnectionAdapters
module Transaction # :nodoc:
class State
attr_reader :connection
def initialize(connection)
@connection = connection
end
end
class Closed < State
def number
0
end
def begin
Open.new(connection, self)
end
def closed?
true
end
def open?
false
end
# This is a noop when there are no open transactions
def add_record(record)
end
end
class Open < State
attr_reader :parent, :records
def initialize(connection, parent)
super connection
@parent = parent
@records = []
@finishing = false
if parent.open?
connection.create_savepoint
else
connection.begin_db_transaction
end
end
def number
if finishing?
parent.number
else
parent.number + 1
end
end
# Database adapters expect that #open_transactions will be decremented
# before we've actually executed a COMMIT or ROLLBACK. This is kinda
# annoying, but for now we use this @finishing flag to toggle what value
# #number should return.
def finishing?
@finishing
end
def begin
Open.new(connection, self)
end
def rollback
@finishing = true
if parent.open?
connection.rollback_to_savepoint
else
connection.rollback_db_transaction
end
rollback_records
parent
end
def commit
@finishing = true
begin
if parent.open?
connection.release_savepoint
records.each { |r| parent.add_record(r) }
else
connection.commit_db_transaction
commit_records
end
rescue Exception
if parent.open?
connection.rollback_to_savepoint
else
connection.rollback_db_transaction
end
rollback_records
raise
end
parent
end
def add_record(record)
records << record
end
def rollback_records
records.uniq.each do |record|
begin
record.rolledback!(parent.closed?)
rescue => e
record.logger.error(e) if record.respond_to?(:logger) && record.logger
end
end
end
def commit_records
records.uniq.each do |record|
begin
record.committed!
rescue => e
record.logger.error(e) if record.respond_to?(:logger) && record.logger
end
end
end
def closed?
false
end
def open?
true
end
end
end
end
end
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