AWS AppSync lab step by step with screenshot

 AWS AppSync is a fully managed GraphQL service that makes it easy to build scalable, real-time applications. It offers features like data synchronization, offline support, and integration with other AWS services.

1. Prerequisites

• An AWS account
• Node.js and npm installed

2. Create an AppSync API

• Navigate to AppSync: In the AWS Management Console, search for "AppSync" and select the service.
• Create API: Click on "Create API".
• Provide details: Give your API a name and description.
• Choose a schema: Select a schema or create a new one.
• Create the API: Click "Create API".

creating an AppSync API

3. Define Your GraphQL Schema

• Edit schema: Click on the "Schema" tab in your API.
• Define types: Define the types of data you want to expose in your API (e.g., User, Post).
• Define resolvers: Create resolvers that map GraphQL operations (queries, mutations, subscriptions) to underlying data sources.

4. Configure Data Sources

• Add data source: Click on "Data sources" in your API.
• Choose a data source type: Select a data source type (e.g., Amazon DynamoDB, AWS Lambda).
• Configure settings: Provide the necessary settings for the data source.
• Create the data source: Click "Create data source".

configuring a data source in AppSync

5. Create a Resolver

• Select a type: Click on a type in your schema.
• Create resolver: Click on "Create resolver".
• Choose a field: Select the field you want to resolve.
• Configure resolver: Configure the resolver settings, including the data source and the request mapping template.
• Create the resolver: Click "Create resolver".

creating a resolver in AppSync

6. Test Your API

• Use the GraphQL Playground: Use the GraphQL Playground integrated into the AppSync console to test your API.
• Execute queries and mutations: Send queries and mutations to your API and inspect the results.

Additional Steps

• Enable subscriptions: Configure subscriptions to receive real-time updates when data changes.
• Integrate with other AWS services: AppSync can be integrated with other AWS services like Cognito for authentication and AWS IoT for real-time data streams.
• Use AWS Amplify: Use AWS Amplify to build client-side applications that interact with your AppSync API.