Building Modern GraphQL APIs

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Agenda ● REST and GraphQL ● What is GraphQL ● AWS AppSync ● Build a GraphQL API @womenwhocode #WWCode

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REST and GraphQL API @womenwhocode #WWCode

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REST and GraphQL - A Burger Comparison @womenwhocode #WWCode

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REST API Request @womenwhocode #WWCode Pic Courtesy : https://phpenthusiast.com/blog/what-is-rest-api

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GraphQL API Request @womenwhocode #WWCode Pic Courtesy:https://www.tutorialspoint.com/

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REST Github API Response @womenwhocode #WWCode

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GraphQL Github API Response @womenwhocode #WWCode

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Short Summary ● GraphQL is an APIs just like RESTful. ● Ask for what you want. ● Use only POST to send data. ● Get Predictable Results. @womenwhocode #WWCode

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GraphQL Server @womenwhocode #WWCode

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GraphQL Server comprises of @womenwhocode #WWCode 1. GraphQL schema – API or application data defined and modeled in a GraphQL schema definition language (SDL). 2. Resolvers – business logic linking or “resolving” types/fields defined in the GraphQL schema with the data in the data sources.

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GraphQL Schema @womenwhocode #WWCode

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GraphQL Operations @womenwhocode #WWCode - Query (GET) - Subscription - Mutation (PUT/DELETE)

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Benefits ● No over/under fetching of data. ● Predefined Schema Definition. ● Strongly typed. ● Documentation support via the Schema doc. @womenwhocode #WWCode

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GraphQL is a query language for APIs and a runtime for fulﬁlling those queries with your existing data. GraphQL provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing more, makes it easier to evolve APIs over time, and enables powerful developer tools. - - graphql.org @womenwhocode #WWCode

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Build a GraphQL API server @womenwhocode #WWCode

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Design Considerations ● Efﬁciency ● Security ● Caching ● Monitoring ● Documentation ● Database Integration ● Real-time updates ... @womenwhocode #WWCode

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What if it’s all are provided and managed? @womenwhocode #WWCode

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The answer is AWS AppSync @womenwhocode #WWCode

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GraphQL Server consists of @womenwhocode #WWCode

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AWS AppSync ● Deﬁne Schema ● Attach Datasource ● Create Resolvers @womenwhocode #WWCode

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Demo... @womenwhocode #WWCode

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Questions ? @womenwhocode #WWCode

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References https://aws.amazon.com/appsync/blog https://pradheepa.medium.com/lambda-data-source-in-aws-appsync-using- serverless-framework-2f20ee3ed8aa Github : pradheepap Twitter: @pradheepa Website : www.pradheepa.com @womenwhocode #WWCode

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