An RPC library for Kotlin services that strives to balance developer productivity and performance.

Related tags

Networking indie-rpc
Overview

IndieRpc

An RPC library for Kotlin services that strives to balance developer productivity and performance.

IndieRpc is inspired by Golang's net/rpc package, Twitch's Twirp, and of course gRPC.

Background

Working with gRPC was always difficult for both backend and client devs. Backend devs had to write custom tooling to deal with load balancing as it did not play nicely with existing http load balancers.

For client devs, the generated code was quite unergonomic to use and required a completely orthogonal architecture to the already existing http layer that was already there.

Usage

Register instances that implement your service interface. The same instance will be used to service each request . The only methods that will be registered will be the ones that take in a single parameter of type data class and return a data class.

-> val addResponseResult = indieClient.invokeRpcMethod( RpcTarget(serviceName, "sum"), MathService.AddRequest(1, 2), MathService.AddResponse::class.java ) "> 
class MathService(private val const: Int) {
  data class AddRequest(val x: Int, val y: Int)
  data class AddResponse(val sum: Int)

  fun sum(addRequest: AddRequest): AddResponse {
    return AddResponse(addRequest.x + addRequest.y + const)
  }
}

val serviceName = "math.svc"
val mathService = MathService(5)
val indieServer = IndieRpcServer()
indieServer.registerService(serviceName, mathService)
indieServer.startServer()

val indieClient = IndieRpcClient()

// returns Result
    
      -> 
     
    
val addResponseResult = indieClient.invokeRpcMethod(
  RpcTarget(serviceName, "sum"),
  MathService.AddRequest(1, 2),
  MathService.AddResponse::class.java
)

Maven

In your pom file add

<repositories>
  <repository>
    <id>githubid>
    <url>https://maven.pkg.github.com/asad-awadia/indie-rpcurl>
  repository>
repositories>

  
<dependency>
  <groupId>dev.aawadiagroupId>
  <artifactId>indie-rpcartifactId>
  <version>0.1.1version>
dependency>

Tech notes

The server and client both use Vert.x. Service methods must be thread safe and can have blocking code.

Roadmap

Depending on the interest in this project these are the future enhancements planned

  1. Use proper logging instead of println
  2. Micrometer metrics
  3. Streaming messages via websockets
  4. Tcp and udp support
  5. Generate client SDK wrapper
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Releases(v0.1.1)
Owner
Asad Awadia
https://blog.aawadia.dev
Asad Awadia
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