example/example.rb
require 'sagas'
num = 0
transaction = Sagas.transaction
exceptions_to_catch = [StandardError]
transaction.run_command(name: 'Add', catch_exceptions: exceptions_to_catch) do
perform do
num += 10
end
undo do
num -= 10
end
end
transaction.run_command(name: 'Multiply', catch_exceptions: exceptions_to_catch) do
perform do
num *= 2
raise StandardError.new('Error while trying to perform')
end
undo do
num /= 2
end
end
transaction.run_command(name: 'Subtract', catch_exceptions: exceptions_to_catch) do
perform do
num -= 7
end
undo do
num += 7
end
end
# num => 0