AWS AppSync
What is AWS AppSync?
AWS AppSync simplifies the process of developing an application by providing us to create flexible, secure, extensible, and real-time APIs. It can be called “The Facilitator” because it connects the client applications (mobile apps, web apps, IOT services, etc.) to AWS services (DynamoDB, AWS Aurora, etc.).
AppSync = “The Facilitator”
Within AWS AppSync, there are GraphQL schema and Resolvers that help secure access and combine data from databases, API, and other backend systems.
GraphQL Schema: This is the unique structure that AWS AppSync uses to layout the data format before putting it into a database schema.
Resolvers: This resolves the data types, which the user creates in the Graph schema to put and receive from the data source.
AppSync Benefits:
● Fast setup – great scalability as needed.
● Real-time subscriptions and offline access.
● Unified secured access.
● Provision of caching capabilities for performance improvements.
● Bandwidth optimization.
● Conflict resolution in the cloud.
Use Cases:
There are many use cases where AWS AppSync can play a vital role. Some of them are below:
● Banking Alerts.
● Chat Applications.
● Financial transactions.
● Shared Whiteboards.
● Document Collaboration
● Multiplayer games.
The below diagram shows how AWS AppSync helps to build a real-time blog application. AWS Cognito provides secure authentication. The user can create all the CRUD operations, posts, comments, etc., using the facilitator (AWS AppSync) and store/receive to Amazon backend servers such as DynamoDB, AWS Aurora, AWS Lambda, etc.
Pricing:
● Query and Data Modification Operations
○ $4.00 per million operations.
● Real-time Updates
○ $2.00 per million updates.
○ $0.08 per million minutes of connection to the AWS AppSync service
