Summary

• Amazon's SWF is a workflow-management service that helps build applications that can handle work through distributed components.
• A workflow is a mechanism to execute a number of distributed application tasks in an asynchronous way.
• SWF keeps the history or execution progress of any workflow in the workflow history.
• In SWF, an actor is a program or an entity that performs different types of activities in a workflow. An actor can be workflow starter, decider, or activity worker.
• A workflow starter is a program or an application that starts the execution of a workflow.
• A decider is a program or an application that decides the coordination logic of a workflow.
• An activity worker is a program or an application that receives tasks from SWF, executes the tasks, and returns the result to SWF.
• The work assignments that SWF provides to activity workers and deciders are called...