Xenos Client for Kotlin is a gRPC client/binding that wraps the raw protobuf stubs and communication with Xenos in an easy-to-use, polished API. It is possible to add the client as a dependency in Maven and Gradle, simplifying the process of supporting Xenos within projects.

The bindings are automatically created and then documented and equipped with sane defaults to assist developers in quickly adapting the API and removing the need to understand the inner workings of Protobuf and gRPC.

Motivation

For the original motivation regarding the development of Xenos, visit the original project here. Xenos Client for Kotlin was developed to simplify the embedding into existing Minecraft infrastructure while still enabling advances syntax sugar for Kotlin based setups. While we do our best to support plain Java projects, this client is developed with a "Kotlin first" approach.

This is reflected in the heavy use of suspended functions. They are the ideal language feature to reflect asynchronous communication with a service, so they had to be included into our client. While they are strongly embedded into the foundation of Kotlin, and the use within plain Java projects is, admittedly, a little cumbersome, there are still a few options to invoke them from within Java code. But we recommend calling the API from Kotlin instead and switching to a hybrid project.

We strive to optimize this client with efficient defaults and still allow users to tweak the client to their liking or infrastructural needs. This way, new developers don't need to meddle with things like gRPC pipeline configuration or the decision of which stub to use, but can focus on developing their applications instead.

Major Features

• Communicate with your local or remote Xenos instance through gRPC with blazing fast response times.
• Treat the request of Minecraft profile information like local data and never think about rate limits or performance impact ever again.
• Get cached responses if the Mojang API is currently unavailable to continue working even while there is an outage.
• Use pooled connections to Xenos to benefit from the HA capabilities.
• Ignore the inner workings of the protocol transfer and just think about the data. Xenos-Client will handle the rest for you!
• Invoke simplified methods to retrieve the data that you really care about, without any boilerplate code on your end.

Getting started

In order to use this client, your application needs to have access to some instance of Xenos and this instance needs to have gRPC enabled. For information on how to deploy your own instance and preparing it for connections from your clients, visit this documentation.

Dependency

After your instance is up and running, you have to add Xenos Client for Kotlin to your dependencies:

dependencies {
    // make sure to specify the latest version
    api("net.scrayos", "xenos-client", "0.1.0")

    // choose your own gRPC runtime or use an existing one
    runtimeOnly("io.grpc", "grpc-netty", "1.63.0")
}

Instead of grpc-netty you may also use grpc-netty-shaded (which hides the transitive Netty dependency) or any other compatible gRPC runtime. We recommend sticking with the default runtime but in theory, Xenos Client should be compatible with either runtime.

Since Xenos Client is deployed to the official Maven Central repository, you don't need to include any special repositories:

repositories {
    mavenCentral()
}

After reloading your Gradle project, you should now be able to retrieve all related classes.

Usage

Below you can find a guide on obtaining a XenosClient, the central interface to perform lookups through Xenos. Please use the version, appropriate for your language (Java/Kotlin).

Kotlin

// host and port could be supplied by an environment variable or flag
val client = GrpcXenosClient("127.0.0.1", 50051)

// any request can be performed on the client while it is open
val profile = client.getProfile(UUID.randomUUID())

Java

// host and port could be supplied by an environment variable or flag
XenosClient client = new GrpcXenosClient("127.0.0.1", 50051);

// any request can be performed on the client while it is open
ProfileResult profile = client.getProfile(UUID.randomUUID());

Reporting Security Issues

To report a security issue for this project, please note our Security Policy.

Code of Conduct

Participation in this project comes under the Contributor Covenant Code of Conduct.

How to contribute

Thanks for considering contributing to this project! In order to submit a Pull Request, please read our contributing guide. This project is in active development, and we're always happy to receive new contributions!

License

This project is developed and distributed under the MIT License. See this explanation for a rundown on what that means.