GraphQL Federation, the missing piece of microservices
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This document discusses GraphQL Federation as a way to combine multiple GraphQL APIs into a single federated graph. GraphQL Federation allows clients to interact with multiple microservices through a single GraphQL endpoint and query, retrieving necessary data in one request. It streamlines the request/response cycle while preserving client simplicity and performance. Individual teams can develop GraphQL APIs independently and contribute to the unified federated schema without needing to maintain separate API layers.
GraphQL Federation, the missing piece of microservices
- 1. GraphQL Federation, the missing piece of microservices dtuan@alpha-sense.com / dt@luc.vc https://www.alpha-sense.com/careers/helsinki/ Jobs are opening
- 2. 1 AlphaSense is a AI-Powered Search leading all-in-one market intelligence platform headquarters in US recognized by Forbes as a top 50 AI company in 2023 🇺🇸 🇫🇮 🇮🇳 🇸🇬 🇩🇪 🏴
- 3. API Team GraphQL Service Development & Maintenance GraphQL Federation Knowledge Leaders & Educators Exposing GraphQL APIs to External Clients https://www.alpha-sense.com/ https://www.alpha- sense.com/careers/helsinki/
- 4. 4 Microservices are domain-based monolith service services
- 5. 5 Monolith async function runQuery() { try { const client = await pool.connect(); const result: QueryResult = await client.query('SELECT * FROM your_table_name'); client.release(); } catch (error) { console.error('Error executing query:', error); } } Presentation Layer Logic Layer Data Layer Database
- 6. 6 Microservices async function runQuery() { try { const client = await pool.connect(); const result: QueryResult = await client.query('SELECT * FROM your_table_name'); client.release(); } catch (error) { console.error('Error executing query:', error); } } Database APIs User async function runQuery() { try { const client = await pool.connect(); const result: QueryResult = await client.query('SELECT * FROM your_table_name'); client.release(); } catch (error) { console.error('Error executing query:', error); } } Database APIs Search async function runQuery() { try { const client = await pool.connect(); const result: QueryResult = await client.query('SELECT * FROM your_table_name'); client.release(); } catch (error) { console.error('Error executing query:', error); } } Database APIs Watchlist User team Search team Watchlist team
- 7. 7 Consider following example Client wants to fetch user together with documents and their watchlists USER Service DOCUMENT Service WATCHLIST Service GET /user/123 GET /documents?user_id=123 GET /watchlists?user_id=123 with RESTful API
- 8. 8 with GraphQL USER Service DOCUMENT Service WATCHLIST Service GraphQL Server GraphQL Gateway GraphQL Gateway GraphQL Server GraphQL simplifies data retrieval by allowing clients to fetch information from multiple services using a single query. With GraphQL, you can create a unified data responsecombining data from different sources, making it much easier for clients to consume.
- 9. 10 REST APIs typically have multiple endpoints for retrieving data from the server, while GraphQLhas a multiple single endpointto which queries are sent. Benefits GraphQLhelps avoidthe issues of 'over-fetching' (retrieving too much data) and 'under- fetching' (retrieving too little data) that often occur in REST APIs."
- 11. 13 Normal GraphQL Server? USER Service DOCUMENT Service WATCHLIST Service GraphQL Server All the graphql will be defined in here
- 12. 14 What is GraphQL Federation? USER Service DOCUMENT Service WATCHLIST Service GraphQL Gateway Combine multipleGraphQL SubGraphs into a single, federatedSuperGraph This federated graphenables clients to interact with multiple APIs through a single request.
- 13. 15 Unified GraphQL API It allows the combination of multiple GraphQL APIs into a single, federated graph. This means clients can interact with multiple APIs through just one request, streamlining the request and response cycle Other benefits Preserving Client Simplicity and Performance It eliminates the need for multiple requests to different non-federated GraphQL APIs, offering the advantage of fetching all necessary data in a single request, which is particularly beneficial in scenarios where multiple teams develop APIs independently Simplified Schema Design at Scale Unlike other approaches that may complicate the federated schema, GraphQL Federation allows clients to interact with the federated schema as if it were a single, monolithic structure. This simplifies both frontend and backend interactions Single API Maintenance Each team contributes to the federated GraphQL schema, working independently without the need to maintain multiple API layers. This approach centralizes quality control and updates to a single platform team
- 14. 16 How to develop with GraphQL Federation? GraphQL Gateway USER Service WATCHLIST Service DOCUMENT Service Git repositories CI/CD Pipeline SuperGraph Builder
- 16. 18 GraphQL Cosmo