stepfunction.json

{
  "Comment": "This is your state machine",
  "StartAt": "Choice",
  "States": {
    "Choice": {
      "Type": "Choice",
      "Choices": [
        {
          "And": [
            {
              "Variable": "$.s3Key",
              "IsPresent": true
            },
            {
              "Variable": "$.userId",
              "IsPresent": true
            },
            {
              "Variable": "$.s3Bucket",
              "IsPresent": true
            }
          ],
          "Next": "FaceDetection"
        }
      ],
      "Default": "TransformS3event"
    },
    "TransformS3event": {
      "Type": "Pass",
      "Next": "FaceDetection",
      "Parameters": {
        "userId.$": "$.detail.userIdentity.principalId",
        "s3Bucket.$": "$.detail.requestParameters.bucketName",
        "s3Key.$": "$.detail.requestParameters.key"
      }
    },
    "FaceDetection": {
      "Type": "Task",
      "Resource": "arn:aws:states:::lambda:invoke",
      "Parameters": {
        "FunctionName": "arn:aws:lambda:us-east-1:571724487590:function:ImageProcessing-FaceDetectionFunction-4OBhA2yrMd7g:$LATEST",
        "Payload.$": "$"
      },
      "Retry": [
        {
          "ErrorEquals": [
            "Lambda.ServiceException",
            "Lambda.AWSLambdaException",
            "Lambda.SdkClientException"
          ],
          "IntervalSeconds": 2,
          "MaxAttempts": 6,
          "BackoffRate": 2
        }
      ],
      "Next": "CheckFaceDuplicate",
      "ResultPath": "$.detectedFaceDetails",
      "Catch": [
        {
          "ErrorEquals": [
            "PhotoDoesNotMeetRequirementError"
          ],
          "Next": "PhotoDoesNotMeetRequirement",
          "ResultPath": "$.errorInfo"
        }
      ]
    },
    "CheckFaceDuplicate": {
      "Type": "Task",
      "Resource": "arn:aws:states:::lambda:invoke",
      "Parameters": {
        "FunctionName": "arn:aws:lambda:us-east-1:571724487590:function:ImageProcessing-FaceSearchFunction-Tt2kgG9KNXgk:$LATEST",
        "Payload.$": "$"
      },
      "Next": "ParallelProcessing",
      "ResultPath": null,
      "Catch": [
        {
          "ErrorEquals": [
            "PhotoDoesNotMeetRequirementError"
          ],
          "Next": "PhotoDoesNotMeetRequirement",
          "ResultPath": "$.errorInfo"
        }
      ]
    },
    "PhotoDoesNotMeetRequirement": {
      "Type": "Task",
      "Resource": "arn:aws:states:::sns:publish",
      "Parameters": {
        "Message.$": "$",
        "Subject": "Non-compliant photo encountered",
        "TopicArn": "arn:aws:sns:us-east-1:571724487590:ImageProcessing-NotifyMe-OJQS9E21DD9Z"
      },
      "End": true
    },
    "ParallelProcessing": {
      "Type": "Parallel",
      "Next": "PersistMetadata",
      "Branches": [
        {
          "StartAt": "AddFaceToIndex",
          "States": {
            "AddFaceToIndex": {
              "Type": "Task",
              "Resource": "arn:aws:states:::lambda:invoke",
              "Parameters": {
                "FunctionName": "arn:aws:lambda:us-east-1:571724487590:function:ImageProcessing-IndexFaceFunction-S6Rcmrc2xojC:$LATEST",
                "Payload.$": "$"
              },
              "Retry": [
                {
                  "ErrorEquals": [
                    "Lambda.ServiceException",
                    "Lambda.AWSLambdaException",
                    "Lambda.SdkClientException"
                  ],
                  "IntervalSeconds": 2,
                  "MaxAttempts": 6,
                  "BackoffRate": 2
                }
              ],
              "End": true
            }
          }
        },
        {
          "StartAt": "Thumbnail",
          "States": {
            "Thumbnail": {
              "Type": "Task",
              "Resource": "arn:aws:states:::lambda:invoke",
              "Parameters": {
                "FunctionName": "arn:aws:lambda:us-east-1:571724487590:function:ImageProcessing-ThumbnailFunction-hZ9Lxl4K5e4X:$LATEST",
                "Payload.$": "$"
              },
              "Retry": [
                {
                  "ErrorEquals": [
                    "Lambda.ServiceException",
                    "Lambda.AWSLambdaException",
                    "Lambda.SdkClientException"
                  ],
                  "IntervalSeconds": 2,
                  "MaxAttempts": 6,
                  "BackoffRate": 2
                }
              ],
              "End": true
            }
          }
        }
      ],
      "ResultPath": "$.parallelResult"
    },
    "PersistMetadata": {
      "Type": "Task",
      "Resource": "arn:aws:states:::dynamodb:putItem",
      "Parameters": {
        "TableName": "ImageProcessing-RiderPhotoDDBTable-7LKPCXYLDNEL",
        "Item": {
          "Username": {
            "S.$": "$.userId"
          },
          "faceId": {
            "S.$": "$.parallelResult[0].Payload.FaceId"
          },
          "s3bucket": {
            "S.$": "$.s3Bucket"
          },
          "s3key": {
            "S.$": "$.s3Key"
          },
          "thumbnail": {
            "M": {
              "s3bucket": {
                "S.$": "$.parallelResult[1].Payload.thumbnail.s3bucket"
              },
              "s3key": {
                "S.$": "$.parallelResult[1].Payload.thumbnail.s3key"
              }
            }
          }
        }
      },
      "End": true
    }
  }
}