application_service.asl.json

{
  "Comment": "This is a state machine for account application service",
  "StartAt": "Verification",
  "States": {
    "Verification": {
      "Type": "Parallel",
      "Branches": [
        {
          "StartAt": "Check Identity",
          "States": {
            "Check Identity": {
              "Type": "Task",
              "Resource": "arn:aws:states:::lambda:invoke",
              "InputPath": "$.data.identity",
              "Parameters": {
                "FunctionName": "${CheckIdentityFunctionArn}",
                "Payload.$": "$"
              },
              "ResultSelector": {
                "identity.$": "States.StringToJson($.Payload.body)"
              },
              "Retry": [
                {
                  "ErrorEquals": [
                    "Lambda.ServiceException",
                    "Lambda.AWSLambdaException",
                    "Lambda.SdkClientException"
                  ],
                  "IntervalSeconds": 2,
                  "MaxAttempts": 2,
                  "BackoffRate": 2
                }
              ],
              "End": true
            }
          }
        },
        {
          "StartAt": "Check Address",
          "States": {
            "Check Address": {
              "Type": "Task",
              "Resource": "arn:aws:states:::lambda:invoke",
              "InputPath": "$.data.address",
              "Parameters": {
                "FunctionName": "${CheckAddressFunctionArn}",
                "Payload.$": "$"
              },
              "ResultSelector": {
                "address.$": "States.StringToJson($.Payload.body)"
              },
              "Retry": [
                {
                  "ErrorEquals": [
                    "Lambda.ServiceException",
                    "Lambda.AWSLambdaException",
                    "Lambda.SdkClientException"
                  ],
                  "IntervalSeconds": 2,
                  "MaxAttempts": 2,
                  "BackoffRate": 2
                }
              ],
              "End": true
            }
          }
        }
      ],
      "ResultSelector": {
        "identityResult.$": "$[0].identity",
        "addressResult.$": "$[1].address"
      },
      "ResultPath": "$.results",
      "Next": "Approve or Deny"
    },
    "Approve or Deny": {
      "Type": "Choice",
      "Choices": [
        {
          "And": [
            {
              "Variable": "$.results.identityResult.approved",
              "BooleanEquals": true
            },
            {
              "Variable": "$.results.addressResult.approved",
              "BooleanEquals": true
            }
          ],
          "Next": "Add Account",
          "Comment": "Application Approved"
        }
      ],
      "Default": "Deny Message"
    },
    "Add Account": {
      "Type": "Task",
      "Resource": "arn:aws:states:::dynamodb:putItem",
      "InputPath": "$.data",
      "Parameters": {
        "TableName": "${AccountsTable}",
        "Item": {
          "email": {
            "S.$": "$.identity.email"
          },
          "firstname": {
            "S.$": "$.firstname"
          },
          "lastname": {
            "S.$": "$.lastname"
          },
          "address": {
            "S.$": "States.Format('{}, {}, {} - {}', $.address.street, $.address.city, $.address.state, $.address.zip)"
          }
        }
      },
      "ResultSelector": {
        "statusCode.$": "$.SdkHttpMetadata.HttpStatusCode"
      },
      "ResultPath": "$.results.accountAddition",
      "Next": "Home Insurance Interests"
    },
    "Home Insurance Interests": {
      "Type": "Task",
      "Resource": "arn:aws:states:::sqs:sendMessage",
      "InputPath": "$..interests[?(@.category==home)]",
      "Parameters": {
        "QueueUrl": "${HomeInsuranceInterestQueueArn}",
        "MessageBody.$": "$"
      },
      "ResultSelector": {
        "statusCode.$": "$.SdkHttpMetadata.HttpStatusCode"
      },
      "ResultPath": "$.results.homeInsuranceInterests",
      "Next": "Approved Message"
    },
    "Approved Message": {
      "Type": "Task",
      "Resource": "arn:aws:states:::sns:publish",
      "Parameters": {
        "TopicArn": "${SendCustomerNotificationSNSTopicArn}",
        "Message.$": "States.Format('Hello {}, your application has been approved.', $.data.firstname)"
      },
      "ResultSelector": {
        "statusCode.$": "$.SdkHttpMetadata.HttpStatusCode"
      },
      "ResultPath": "$.results.sendApprovedNotification",
      "OutputPath": "$.results",
      "End": true
    },
    "Deny Message": {
      "Type": "Task",
      "Resource": "arn:aws:states:::sns:publish",
      "Parameters": {
        "TopicArn": "${SendCustomerNotificationSNSTopicArn}",
        "Message.$": "States.Format('Hello {}, your application has been denied because validation of provided data failed', $.data.firstname)"
      },
      "ResultSelector": {
        "statusCode.$": "$.SdkHttpMetadata.HttpStatusCode"
      },
      "ResultPath": "$.results.sendDenyNotification",
      "OutputPath": "$.results",
      "End": true
    }
  }
}