Step function

 

🔹 Common State Types in Step Functions

State Type	Purpose
Task	Run a Lambda, ECS, Glue Job, etc.
Choice	Branch logic based on input values
Wait	Pause execution for a period
Pass	Pass input to output (used for testing/transition)
Fail	Stop execution with failure
Succeed	Mark workflow as complete with success
Parallel	Run branches concurrently
Map	Run a loop over a list (like for-each)

Step Functions Definition (Amazon States Language)

json

{
  "Comment": "Athena Query Orchestration",
  "StartAt": "StartQueryExecution",
  "States": {
    "StartQueryExecution": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:StartAthenaQuery",
      "Next": "Wait30Seconds"
    },
    "Wait30Seconds": {
      "Type": "Wait",
      "Seconds": 30,
      "Next": "CheckQueryStatus"
    },
    "CheckQueryStatus": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:CheckAthenaStatus",
      "Next": "QueryComplete?"
    },
    "QueryComplete?": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.status",
          "StringEquals": "SUCCEEDED",
          "Next": "ProcessResults"
        },
        {
          "Variable": "$.status",
          "StringEquals": "FAILED",
          "Next": "FailState"
        }
      ],
      "Default": "Wait30Seconds"
    },
    "ProcessResults": {
      "Type": "Pass",
      "Result": "Athena query succeeded.",
      "End": true
    },
    "FailState": {
      "Type": "Fail",
      "Error": "AthenaQueryFailed",
      "Cause": "Query failed"
    }
  }
}