saga_pattern_demo.json

{
  "Comment": "Applying the Saga pattern with AWS Lambda and Step Functions",
  "StartAt": "BookHotel",
  "States": {
    "BookHotel": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-book-hotel",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.BookHotelError",
          "Next": "CancelHotel"
        }
      ],
      "ResultPath": "$.BookHotelResult",
      "Next":"BookFlight"
    },
    "BookFlight": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-book-flight",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.BookFlightError",
          "Next": "CancelFlight"
        }
      ],
      "ResultPath": "$.BookFlightResult",
      "Next":"BookRental"
    },
    "BookRental": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-book-rental",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.BookRentalError",
          "Next": "CancelRental"
        }
      ],
      "ResultPath": "$.BookRentalResult",
      "End": true
    },
    "CancelHotel": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-cancel-hotel",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.CancelHotelError",
          "Next": "CancelHotel"
        }
      ],
      "ResultPath": "$.CancelHotelResult",
      "Next":"Fail"
    },
    "CancelFlight": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-cancel-flight",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.CancelFlightError",
          "Next": "CancelFlight"
        }
      ],
      "ResultPath": "$.CancelFlightResult",
      "Next":"CancelHotel"
    },
    "CancelRental": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:{AccountID}:function:lambda-saga-dev-cancel-rental",
      "Catch": [        
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.CancelRentalError",
          "Next": "CancelRental"
        }
      ],
      "ResultPath": "$.CancelRentalResult",
      "Next":"CancelFlight"
    },
    "Fail": {
      "Type": "Fail"
    }
  }
}