q.kt

@Path("/greet")
@RequestScoped
open class GreetResource
/**
 * Using constructor injection to get a configuration property.
 * By default this gets the value from META-INF/microprofile-config
 *
 */ @Inject constructor(
        /**
         * The greeting message provider.
         */
        private val greetingProvider: GreetingProvider) {
    /**
     * Return a worldly greeting message.
     *
     * @return [JsonObject]
     */
    @get:Produces(MediaType.APPLICATION_JSON)
    @get:GET
    open val defaultMessage: JsonObject
        get() = createResponse("World")

    /**
     * Return a greeting message using the name that was provided.
     *
     * @param name the name to greet
     * @return [JsonObject]
     */
    @Path("/{name}")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    open fun getMessage(@PathParam("name") name: String): JsonObject {
        return createResponse(name)
    }

    /**
     * Set the greeting to use in future messages.
     *
     * @param jsonObject JSON containing the new greeting
     * @return [Response]
     */
    @Path("/greeting")
    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @RequestBody(name = "greeting", required = true, content = [Content(mediaType = "application/json", schema = Schema(type = SchemaType.STRING, example = "{\"greeting\" : \"Hola\"}"))])
    @APIResponses(APIResponse(name = "normal", responseCode = "204", description = "Greeting updated"), APIResponse(name = "missing 'greeting'", responseCode = "400", description = "JSON did not contain setting for 'greeting'"))
    open fun updateGreeting(jsonObject: JsonObject): Response {
        if (!jsonObject.containsKey("greeting")) {
            val entity = JSON.createObjectBuilder()
                    .add("error", "No greeting provided")
                    .build()
            return Response.status(Response.Status.BAD_REQUEST).entity(entity).build()
        }
        val newGreeting = jsonObject.getString("greeting")
        greetingProvider.setMessage(newGreeting)
        return Response.status(Response.Status.NO_CONTENT).build()
    }

    private fun createResponse(who: String): JsonObject {
        val msg = String.format("%s %s!", greetingProvider.getMessage(), who)
        return JSON.createObjectBuilder()
                .add("message", msg)
                .build()
    }

    companion object {
        private val JSON = Json.createBuilderFactory(emptyMap<String, Any>())
    }