dry-transaction-operation.rb

#!/usr/bin/env ruby
# frozen_string_literal: true

require 'dry/container'
require 'dry/transaction'
require 'dry/transaction/operation'

# Run this as an around step
class First
  # Running this transaction step will fail with
  #   LocalJumpError: yield called out of block
  # But if you comment out the first include and uncomment the
  # second it works

  include Dry::Transaction::Operation
  # include Dry::Monads::Result::Mixin

  def call(input)
    puts "first #{input}"
    yield Success(input + 1)
  ensure
    puts 'done with first'
  end
end

# Run this as a normal step
class Second
  include Dry::Transaction::Operation
  def call(input)
    puts "second #{input}"
    Success(input + 1)
  end
end

Container = Dry::Container.new
Container.register(:first) { First.new }
Container.register(:second) { Second.new }

# top-level transaction
class Transaction
  include Dry::Transaction(container: Container)
  around :first, with: 'first'
  step :second, with: 'second'
end

result = Transaction.new.call(1)
puts(result)