Simple Workflow Service

Solution Architect Associate

  • Web service that makes it easy to coordinate work across distributed AWS components
  • Tasks represent invocations of various processing steps in an application which can be performed by executable code, web service calls, human actions and scripts
  • Workflow Starter
    • Starts workflows…
  • Workers
    • Programs that interact with SWF to get tasks, process received tasks and return results
  • Decider
    • Programs that control the coordination of tasks
  • Know workflows, deciders and workflow starters for exam!!!
  • Workers and Deciders can run on AWS infrastructure, or on machines behind firewalls. SWF brokers the interactions between works and the decider, allowing the decider to get a consistent view of the progress of the tasks and to initiate new tasks
  • SWF monitors the progress of tasks, and ensures a task is only assigned once and is never duplicated
    • Major difference between this and SQS is that SWF guarantees no task duplication
  • Workflows and activity types are scoped to a domain
    • Domains isolate sets of types, executions and task lists from others within the same AWS account
    • You can register a domain using the Console in SWF, or via the API
  • Maximum workflow can be 1 year
  • Task based API
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