step-function-template.json

{
  "Comment": "An example of the Amazon States Language using a choice state.",
  "StartAt": "SendReminder",
  "States": {
    "SendReminder": {
      "Type": "Wait",
      "SecondsPath": "$.waitSeconds",
      "Next": "ChoiceState"
    },
    "ChoiceState": {
      "Type" : "Choice",
      "Choices": [
        {
          "Variable": "$.preference",
          "StringEquals": "email",
          "Next": "EmailReminder"
        },
        {
          "Variable": "$.preference",
          "StringEquals": "sms",
          "Next": "TextReminder"
        },
        {
          "Variable": "$.preference",
          "StringEquals": "both",
          "Next": "BothReminders"
        }
      ],
      "Default": "DefaultState"
    },

    "EmailReminder": {
      "Type" : "Task",
      "Resource": "EMAIL_REMINDER_ARN",
      "Next": "NextState"
    },

    "TextReminder": {
      "Type" : "Task",
      "Resource": "TEXT_REMINDER_ARN",
      "Next": "NextState"
    },
    
    "BothReminders": {
      "Type": "Parallel",
      "Branches": [
        {
          "StartAt": "EmailReminderPar",
          "States": {
            "EmailReminderPar": {
              "Type" : "Task",
              "Resource": "EMAIL_REMINDER_ARN",
              "End": true
            }
          }
        },
        {
          "StartAt": "TextReminderPar",
          "States": {
            "TextReminderPar": {
              "Type" : "Task",
              "Resource": "TEXT_REMINDER_ARN",
              "End": true
            }
          }
        }
      ],
      "Next": "NextState"
    },
    
    "DefaultState": {
      "Type": "Fail",
      "Error": "DefaultStateError",
      "Cause": "No Matches!"
    },

    "NextState": {
      "Type": "Pass",
      "End": true
    }
  }
}