https://github.com/graphqly/vertx-graphql-client

An elegant implementation for code-first GraphQL clients
https://github.com/graphqly/vertx-graphql-client

code-first graphql graphql-reflector

Last synced: 26 days ago
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An elegant implementation for code-first GraphQL clients

• Host: GitHub
• URL: https://github.com/graphqly/vertx-graphql-client
• Owner: graphqly
• License: apache-2.0
• Created: 2020-02-02T11:20:53.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2022-06-21T15:05:28.000Z (over 2 years ago)
• Last Synced: 2024-05-19T14:30:41.544Z (7 months ago)
• Topics: code-first, graphql, graphql-reflector
• Language: Java
• Size: 95.7 KB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE.txt

Awesome Lists containing this project

• awesome-graphql-java - vertx-graphql-client - first GraphQL clients (Schema Libraries / Code First)

README

        
# vertx-graphql-client

*An elegant implementation for code-first GraphQL clients using graphql-reflector & vertx*

## Overview

This code-first implementation is a deadly simple GraphQL client

## Installation

Please add `vertx-graphql-client` to your Maven projects

```

    io.github.graphqly

    vertx-graphql-client

    0.1.0

```

## Usage

You can see demo code in [example](src/main/java/io/github/graphqly/client/example/App.java)

## Demo

### Prepare

This following demo code assumes that you're already had a GraphQL service as followed:

```graphql

input ManifestEchoRequest{

  name: String

}

type ManifestEchoResponse{

  # The output message will be: "Hello " + request.name

  message: String

}

type Query {

  manifestEcho(request: ManifestEchoRequest): ManifestEchoResponse

}

```

Make sure it can be reached at: `http://localhost:4000/graphql`

### Integrate

It's easy to define our abstract class ManifestService 

![](docs/images/code-structures.png)

You may see the similarities between our Java class and the GraphQL definition above.

The code:

```java

GraphqlClient client = GraphqlClient.newBuilder()

        // Optionally set the endpoint

        // Default: http://localhost:4000/graphql 

        .endpoint("http://localhost:4000/graphql")

        

        // Optionally set keep-alive for our http connection

        // Default: true

        .keepAlive(true)

        

        // Optionally set if we need to use SSL

        // Default: false

        .useSSL(false)

        

        // Optionally set User-Agent string

        // Default: graphqly/0.1.0

        .userAgent("demo")

        

        // Optionally set vertx instance

        // Default: null (auto-created later)

        .vertx(vertx)

        .build();

Future response =

    client.callDefault(

        ManifestService.class,

        "manifestEcho",

        ManifestEchoRequest.of("Andy"),

        ManifestEchoResponse.class);

response.setHandler(

    ar -> {

      if (ar.succeeded()) {

        System.out.println(ar.result().message);

      }

    });

```

## Demo

```bash

mvn compile

mvn exec:java -Dexec.mainClass="io.github.graphqly.client.example.App" -Dlog4j.configurationFile=log4j2.xml

```

You may see following output:

```text

Hello Andy

```