SWF

Simple Workflow Service gives you control of coordinating tasks done by applications

• this is multi-step background jobs, like handling an online order
• SWF facilitates these workflows with many tasks (Lambda, activity tasks, decision tasks)
• actors are just their term for processes owned by SWF that are the different components of the entire system
  • decider uses the history log of tasks performed to determine which task to run next
  • the decider can choose to complete, cancel, or fail an open workflow execution
  • workflow starter instantiates a workflow with an empty history
• deciders and activity workers communicate using long polling