Quick Answer: What Are GraphQL Subscriptions Used For?

Is GraphQL RESTful?

GraphQL follows the same set of constraints as REST APIs, but it organizes data into a graph using one interface.

Each object is then backed by a resolver that accesses the server’s data..

Why you should not use GraphQL?

5 reasons you shouldn’t be using GraphQLREST can do much of what GraphQL does.GraphQL will make some tasks more complex.It’s easier to use a web cache with REST than with GraphQL.You could have performance issues with GraphQL queries.The way GraphQL schemas work could be a problem.

Is GraphQL a server?

A GraphQL server is a server-side implementation of the GraphQL spec. In other words, a GraphQL server exposes your data as a GraphQL API that your client applications can query for data. These clients could be a single page application, a CMS like Drupal, a mobile app, or almost anything.

What is the significant benefit of using a GraphQL client library?

Developers often describe the major benefit of GraphQL with the fact that clients can retrieve exactly the data they need from the API. They don’t have to rely on REST endpoints that return predefined and fixed data structures. Instead, the client can dictate the shape of the response objects returned by the API.

What are GraphQL subscriptions?

What are GraphQL subscriptions? Subscriptions are a GraphQL feature that allows a server to send data to its clients when a specific event happens. Subscriptions are usually implemented with WebSockets. In that setup, the server maintains a steady connection to its subscribed client.

How does GraphQL subscription work?

Subscriptions are a way to push data from the server to the clients that choose to listen to real-time messages from the server. … When an event is triggered, the server executes the stored GraphQL query, and the result is sent through the same communication channel opened by the client.

Do GraphQL subscriptions use WebSockets?

Subscriptions are a GraphQL feature allowing the server to send data to its clients when a specific event happens. Subscriptions are usually implemented with WebSockets, where the server holds a steady connection to the client.

Are there any disadvantages to GraphQL?

Following is the list of disadvantages of GraphQL:GraphQL Query Complexity. Don’t mistake GraphQL as a replacement for server-side databases. It is just a simple query language. … GraphQL Caching. It is more complicated to implement a simplified cache with GraphQL than implementing it in REST. … GraphQL Rate Limiting.

How do I test my GraphQL subscription?

Finally: Testing SubscriptionStart the backend subscriptions server (websockets)Create a graphql-subscription client connecting to the server (we will use apollo-client here on the server, just for test)Provide a way for the test to subscribe.

Is GraphQL faster than rest?

GraphQL is faster than REST because as you can pick the fields you want to query, so the request will always be the smallest possible.

Is GraphQL overkill?

Overkill for small applications While GraphQL is the right solution for multiple micro-services, a simple REST API can be better in case you have a service that exposes a really simple API\not API-centric. … Take into consideration future needs, it might change if your app is intended to grow.

What is a query in GraphQL?

A GraphQL query is used to read or fetch values while a mutation is used to write or post values. In either case, the operation is a simple string that a GraphQL server can parse and respond to with data in a specific format. … GraphQL queries help to reduce over fetching of data.