GraphQL-应用程序组件

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📜 GraphQL-应用程序组件

📅 最后修改于: 2020-10-25 05:06:31 🧑 作者: Mango

本章讨论了不同的GraphQL组件及其相互通信的方式。整个应用程序组件可以区分如下-

服务器端组件
客户端组件

服务器端组件

GraphQL服务器构成服务器端的核心组件，并允许解析来自GraphQL客户端应用程序的查询。 Apollo Server是GraphQL规范的最常用实现。其他服务器编程组件包括以下内容-

Sr.No.	Server Essentials & Description
1	Schema A GraphQL schema is at the center of any GraphQL server implementation and describes the functionality available to the clients which connect to it.
2	Query A GraphQL query is the client application request to retrieve data from database or legacy API’s.
3	Resolver Resolvers provide the instructions for turning a GraphQL operation into data. They resolve the query to data by defining resolver functions.

Sr.No.

Server Essentials & Description

Schema

A GraphQL schema is at the center of any GraphQL server implementation and describes the functionality available to the clients which connect to it.

Query

A GraphQL query is the client application request to retrieve data from database or legacy API’s.

Resolver

Resolvers provide the instructions for turning a GraphQL operation into data. They resolve the query to data by defining resolver functions.

客户端组件

下面给出的是客户端组件-

Sr.No.	Tool & Description
1	GraphiQL Browser based interface for editing and testing GraphQL queries and mutations.
2	ApolloClient Best tool to build GraphQL client applications. Integrates well with all javascript front-end.

Sr.No.

Tool & Description

GraphiQL

Browser based interface for editing and testing GraphQL queries and mutations.

ApolloClient

Best tool to build GraphQL client applications. Integrates well with all javascript front-end.

下图显示了客户端-服务器体系结构。 Web服务器基于NodeJ和Express框架构建。 ReactJS应用程序（使用Apollo客户端库构建）或GraphiQL浏览器应用程序向Apollo GraphQL服务器发出请求。该查询将根据服务器中定义的模式进行解析和验证。如果请求模式通过验证，则将执行关联的解析器功能。解析器将包含用于从API或数据库中获取数据的代码。

客户端组件