Graph ql
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The document provides an overview of GraphQL, contrasting it with traditional client-server relationships and addressing common issues like the n+1 query problem. It explains the type system, queries, mutations, and subscriptions involved in GraphQL, highlighting its capability to optimize data interactions. The content emphasizes the importance of stream processing and scalable architecture in utilizing GraphQL effectively.
![GRAPH QL
Graph QL Query
query GetNames {
users {
firstName
lastName
}
}
type Character {
name: String!
appearsIn: [Episode]!
}
7
GraphQL Response
{
‘users’ :
[
{
firstName: ‘John’,
lastName: ‘Smith’
}
]
}](https://image.slidesharecdn.com/graphql-190416194444/85/Graph-ql-7-320.jpg)
Graph ql
- 2. What GraphQL is not? What is GraphQL? 2
- 3. Traditional Client - Server relationship 3 App Server iOS View1 Droid View1 Web View2 Data(id: 10) Data(id: 10) Data(id: 10) Model Model Model
- 4. Traditional Client - Server relationship 4 App Server iOS Complex View Data1(id: 10) Data 2(id: 10) Data 3(id: 10) Model 1 Model 2 Model 3 Sad Server Slow App N + 1 Query Problem
- 5. GraphQL Client - Server relationship 5 App Server iOS Complex View Capabilities (Type System) Requirements (data queries) Type System
- 6. GraphQL Client - Server relationship 6 App Server iOS Complex View Data Shape Client Specific Data Type System Slow App
- 7. GRAPH QL Graph QL Query query GetNames { users { firstName lastName } } type Character { name: String! appearsIn: [Episode]! } 7 GraphQL Response { ‘users’ : [ { firstName: ‘John’, lastName: ‘Smith’ } ] }
- 8. TYPE SYSTEM Type System Object Types and Fields Arguments The Query and Mutation Types Scalar Types Enumeration Types Lists and Non-Null Interfaces 8
- 9. APPLICATION DATA GRAPH - MENTAL MODEL 9
- 10. GRAPH QL 10
- 11. GRAPH QL 11
- 12. GRAPHQL QUERY 12 Parse Validate Execute
- 13. GRAPHQL SUBSCRIPTION EVENT STREAM, RESPONSE STREAM, SOURCE STREAM, EVENT COMPLETION, SUBSCRIPTION CANCELLATION, ERROR N COMPLETION, MAPPER, 13 Parse Validate Subscribe
- 15. GRAPHQL SUBSCRIPTION 15 Create Source Subscribe to the pub sub service Watch for database writes / listen for triggers Process the Kafka Stream Listen to incoming http calls Incoming stock prices per tick or anything which could create an event stream
- 17. 17 TransportGraphQL Client Http Graph QL Query
- 19. GRAPHQL SUBSCRIPTION 19 I/O I/O Web Sockets MQTT or RabbitMQ Post to Web hooks Send an email etc