A Sample state machine spec which shows wiring up lambdas execution in parallel, a choice state, a pass state, input paths and result paths

SpecStateMachine.json

{
  "Comment": "Load Data from Firebase and send it to AWS Cloud Search",
  "StartAt": "CalculateInterval",
  "States": {
    "Get data from Firebase": {
      "Type": "Parallel",
      "Next": "Format Parallel Processed Data",
      "Branches": [
        {
          "StartAt": "Fetch User Data",
          "States": {
            "Fetch User Data": {
              "Type": "Task",
              "Resource": "arn:aws:lambda:us-west-2:12345:function:oc_fetchUserData",
              "End": true
            }
          }
        },
        {
          "StartAt": "Fetch Story Data",
          "States": {
            "Fetch Story Data": {
              "Type": "Task",
              "Resource": "arn:aws:lambda:us-west-2:12345:function:oc_fetchStoryData",
              "End": true
            }
          }
        }
      ]
    },
    "Format Parallel Processed Data" :{
      "Type" : "Task",
      "Resource" : "arn:aws:lambda:us-west-2:12345:function:oc_convertArrayToObject",
      "Next": "Check if new data found"
    },
    "Check if new data found" : {
      "Type" : "Choice",
      "Choices" : [
        {
          "Or" : [
            {
              "Variable": "$.stories.count",
              "NumericGreaterThan": 0                            
            },
            {
              "Variable": "$.users.count",
              "NumericGreaterThan": 0  
            }
          ],
          "Next" : "Add Data to Search"
        }
      ],
      "Default" : "NoDataState"
    },
    "Add Data to Search": {
      "Type": "Task",
      "Resource" : "arn:aws:lambda:us-west-2:12345:function:oc_addSearchData",
      "Next" : "Cleanup",
      "ResultPath" : "$"
    },
    "Cleanup" : {
      "Type" : "Task",
      "Resource" : "arn:aws:lambda:us-west-2:12345:function:oc_cleanup",
      "End" : true
    },
    "CalculateInterval" : {
      "Type" : "Task",
      "Resource" : "arn:aws:lambda:us-west-2:12345:function:oc_initiateIndexing",
      "Next" : "Get data from Firebase",
      "ResultPath" : "$.time"
    },
    "NoDataState": {
      "Type": "Pass",
      "End" : true
    }
  }
}