JAX-WS on Jetty + Google Guice in Kotlin

build.gradle

buildscript {
  ext.kotlin_version = '1.2.0'
  repositories { mavenCentral() }
  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

apply plugin: 'kotlin'

def jersey_version = "2.23.1"

def jetty_version = "9.4.6.v20170531"

repositories { mavenCentral() }
dependencies {

  compile fileTree(dir: 'lib', include: ['*.jar'])

  // JAX-WS
  compile 'javax.ws.rs:javax.ws.rs-api:2.0.0'

  // Kotlin
  compile group: "org.jetbrains.kotlin", version: kotlin_version, name: "kotlin-stdlib"
  compile group: "org.jetbrains.kotlin", version: kotlin_version, name: "kotlin-reflect"

  testCompile group: "org.jetbrains.kotlin", version: kotlin_version, name: "kotlin-test"
  testCompile group: "org.jetbrains.kotlin", version: kotlin_version, name: "kotlin-test-junit"

  // Jersey
  compile group: 'org.glassfish.jersey.containers', version: jersey_version, name: 'jersey-container-servlet'
  compile group: 'org.glassfish.jersey.containers', version: jersey_version, name: 'jersey-container-servlet-core'

  compile group: 'org.glassfish.jersey.media', version: jersey_version, name: 'jersey-media-multipart'
  compile group: 'org.glassfish.jersey.media', version: jersey_version, name: 'jersey-media-json-jackson'

  // Jetty
  compile group: 'org.eclipse.jetty', version: jetty_version, name: 'jetty-server'
  compile group: 'org.eclipse.jetty', version: jetty_version, name: 'jetty-servlet'
  
  // Google Guice (DI Container)
  compile group: 'com.google.inject', name: 'guice', version: '4.0'

}

EntryPoint.kt

package jp.segfault.playground.aswj

import com.google.inject.Inject
import com.google.inject.Singleton
import javax.ws.rs.GET
import javax.ws.rs.Path
import javax.ws.rs.Produces
import javax.ws.rs.core.MediaType
import javax.ws.rs.core.Response

@Singleton
@Path("/api")
class EntryPoint {
    
    @Inject constructor()
    
    @Inject
    lateinit var myService: MyService

    @GET
    @Path("debug")
    @Produces(MediaType.APPLICATION_JSON)
    fun test(): Response {
        return Response.ok(Debug("foo", System.currentTimeMillis())).build()
    }
}

data class Debug(val name: String, val time: Long)

Main.kt

package jp.segfault.playground.aswj

import com.google.inject.AbstractModule
import com.google.inject.Guice
import org.eclipse.jetty.server.Server
import org.eclipse.jetty.servlet.ServletContextHandler
import org.eclipse.jetty.servlet.ServletHolder
import org.glassfish.jersey.server.ResourceConfig
import org.glassfish.jersey.servlet.ServletContainer

object Main {
  @JvmStatic fun main(args: Array<String>) {
    val injector = Guice.createInjector(object : AbstractModule() {
      override fun configure() {
      }
    })
    val server = Server(8080)
    server.handler = ServletContextHandler(ServletContextHandler.SESSIONS).apply {
      contextPath = "/"
      addServlet(ServletHolder(ServletContainer(object: ResourceConfig() {
        init {
          register(injector.getInstance(EntryPoint::class.java))
        }
      })), "/*")
    }
    server.start()
    server.join()
  }
}

MyService.kt

package jp.segfault.playground.aswj

import com.google.inject.Inject
import com.google.inject.Singleton
import javax.ws.rs.GET
import javax.ws.rs.Path
import javax.ws.rs.Produces
import javax.ws.rs.core.MediaType
import javax.ws.rs.core.Response

@Singleton
class MyService {

    @Inject constructor()
  
    hello(): String = "Hello!";
}