Step functions and AppSync

Question 1

Step functions

Answer 1

• model workflows in json as state machines (one per workflow)
• comprised by task states that invoke aws services
• step function states
  
  • parallel state - parallel branches of execution
• good for error handling
• result path lets you include error in input of next task
• standard vs express
  
  • 1 year max duration
  • express 5 min max duration

Question 2

AWS AppSync

Answer 2

• managed service that uses GraphQL
  
  • replacement for cognito sync
    
    • mobile data offline synchronization
  • graphQL - new style of API
    
    • makes it easy for apps to get what they need
  • security - api key, IAM, openID connect, cognito user pools

Question 3

AWS Amplify

Answer 3

• create mobile and web apps
  
  • set of tools - elastic beanstalk for mobile and web apps
  • provides front-end libraries
  • primary features
    
    • authentication using amazon cognito
    • pre built ui components
    • datastore - appsync for api and amazon dynamo db for data storage
    • auto synchronization to the cloud
    • model data with amplify studio
    • integrated hosting