Create AWS Step Functions Demo - Call Center Example - awsugperu

deploy-demo-stepfunctions.txt

Demo AWS UG PE - Step Functions - Day 1

Paso 1: Step Functions Demo - State Language  - awsugperu

{
  "Comment": "A simple AWS Step Functions state machine that automates a call center support session.",
  "StartAt": "Open Case",
  "States": {
    "Open Case": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
      "Next": "Assign Case"
    }, 
    "Assign Case": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
      "Next": "Work on Case"
    },
    "Work on Case": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
      "Next": "Is Case Resolved"
    },
    "Is Case Resolved": {
        "Type" : "Choice",
        "Choices": [ 
          {
            "Variable": "$.Status",
            "NumericEquals": 1,
            "Next": "Close Case"
          },
          {
            "Variable": "$.Status",
            "NumericEquals": 0,
            "Next": "Escalate Case"
          }
      ]
    },
     "Close Case": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
      "End": true
    },
    "Escalate Case": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
      "Next": "Fail"
    },
    "Fail": {
      "Type": "Fail",
      "Cause": "Engage Tier 2 Support."    }   
  }
}



Paso 2: IAM Role - step_functions_basic_execution

Paso 3: Elegir el IAM role en la creacion del Step Function

Paso 4: Crear los Lambdas:

  4.1: OpenCaseFunction:
      Name – OpenCaseFunction
      Runtime – Node.js 4.3
      Role – Create custom role

exports.handler = (event, context, callback) => {
    // Create a support case using the input as the case ID, then return a confirmation message   
   var myCaseID = event.inputCaseID;
   var myMessage = "Case " + myCaseID + ": opened...";   
   var result = {Case: myCaseID, Message: myMessage};
   callback(null, result);    
};


  4.2: AssignCase

exports.handler = (event, context, callback) => {    
    // Assign the support case and update the status message    
    var myCaseID = event.Case;    
    var myMessage = event.Message + "assigned...";    
    var result = {Case: myCaseID, Message: myMessage};
    callback(null, result);        
};


  4.3: WorkOnCaseFunction

exports.handler = (event, context, callback) => {    
    // Generate a random number to determine whether the support case has been resolved, then return that value along with the updated message.
    var min = 0;
    var max = 1;    
    var myCaseStatus = Math.floor(Math.random() * (max - min + 1)) + min;
    var myCaseID = event.Case;
    var myMessage = event.Message;
    if (myCaseStatus == 1) {
        // Support case has been resolved    
        myMessage = myMessage + "resolved...";
    } else if (myCaseStatus == 0) {
        // Support case is still open
        myMessage = myMessage + "unresolved...";
    } 
    var result = {Case: myCaseID, Status : myCaseStatus, Message: myMessage};
    callback(null, result); 
};


  4.4: CloseCaseFunction

exports.handler = (event, context, callback) => { 
    // Close the support case    
    var myCaseStatus = event.Status;    
    var myCaseID = event.Case;    
    var myMessage = event.Message + "closed.";    
    var result = {Case: myCaseID, Status : myCaseStatus, Message: myMessage};
    callback(null, result);
};

  4.5: EscalateCaseFunction

exports.handler = (event, context, callback) => {    
    // Escalate the support case 
    var myCaseID = event.Case;    
    var myCaseStatus = event.Status;    
    var myMessage = event.Message + "escalating.";    
    var result = {Case: myCaseID, Status : myCaseStatus, Message: myMessage};
    callback(null, result);
};


Paso 5: Actualizar el workflow con los ARN de los Lambdas


Paso 6: Ejecutar el workflow

  Input: 

{
"inputCaseID": "001"
}