Appsync Unified Repo =link= -

src/ ├── graphql/ │ ├── mutations/ │ ├── queries/ │ ├── subscriptions/ │ └── fragments/ ├── repository/ │ ├── AppSyncUnifiedRepository.ts │ ├── types.ts │ └── errors.ts ├── client/ │ └── AppSyncClient.ts └── models/ └── index.ts

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In a microservices architecture, front-end developers often have to call 5 different APIs to render one page. AppSync Unified allows you to stitch these together. The client makes one GraphQL request, and AppSync handles the fan-out to various DynamoDB tables, Lambda functions, or HTTP endpoints (REST APIs/other GraphQL APIs). appsync unified repo

Go to the search tab and search for AppSync Unified .

// Subscribe to real-time updates const subscription = postRepository.subscribeToCreated().subscribe( next: (newPost) => setPosts((prev) => [newPost, ...prev]), error: (err) => console.error('Subscription error:', err), ); AppSync Unified allows you to stitch these together

Consider a mid-sized e-commerce company with 12 microservices. Their old setup:

| Aspect | Monolithic AppSync API | Unified Repo (Merged APIs) | | :--- | :--- | :--- | | | Low. A single team controls the entire API, creating a bottleneck. | High. Multiple teams own and deploy their Source APIs independently. | | Development Speed | Slow. Changes from any team require coordination and potentially redeploying the entire API. | Fast. Teams can release updates to their Source API on their own schedule. | | Scalability | Limited. It's an all-or-nothing approach to scaling and management. | High. Each Source API can be managed, scaled, and secured separately. | | Client Experience | Unclear. Clients are often forced to make multiple calls or receive irrelevant data. | Excellent. Clients interact with a single, unified schema tailored to their needs. | // Subscribe to real-time updates const subscription =

A "Merged API" acts as the umbrella. It imports the schemas from the source APIs and merges them into a single, unified execution layer. Conflict Resolution:

export function response(ctx) return ctx.result;

jobs: deploy-appsync-api: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - name: Install dependencies run: yarn install --frozen-lockfile - name: Type check all packages run: yarn tsc --noEmit - name: Build Lambda bundles run: yarn build:lambdas - name: CDK Deploy run: npx cdk deploy AppSyncUnifiedStack --require-approval never - name: Run integration tests run: yarn test:e2e