I'm learning how to use Dagger 2 and MVP architeture.
But I'm stuck in this error now:
Unresolved reference: DaggerHelloComponent
Look, this is my module:
#Module
class HelloModule {
lateinit var activityDagger: HelloActivityDagger
constructor(activityDagger: HelloActivityDagger) {
this.activityDagger = activityDagger
}
#Provides
fun providesHelloPresenter(): HelloActivityPresenterDagger = HelloActivityPresenterDagger(activityDagger)
}
and my component:
#Component(modules = [HelloModule::class])
interface HelloComponent {
fun inject(activityDagger: HelloActivityDagger)
}
So when I try to builder this component like this DaggerHelloComponent.create().inject(this) in my HelloActivityDagger shows me the error above.
Anyone know what I am doing wrong?
Cause I can see whats wrong in this code.
Oh, I already have followed this kapt things from this question Unresolved reference DaggerApplicationComponent and nothing happens
EDIT
To be more readable I`ve uploaded my project to Git. https://github.com/luangs7/DaggerMvpExample
Putting this code in the MyApplication class works for me to create the module starting off from your GitHub project - after the first failed build, kapt generates the DaggerHelloComponent class, and I can import it.
import android.app.Application
import br.com.squarebits.mvpexample.DaggerMvp.componentes.DaggerHelloComponent
import br.com.squarebits.mvpexample.DaggerMvp.componentes.HelloComponent
import br.com.squarebits.mvpexample.DaggerMvp.modules.HelloModule
class MyApplication : Application() {
val component: HelloComponent by lazy {
DaggerHelloComponent.builder()
.helloModule(HelloModule(HelloActivityDagger()))
.build()
}
}
If this is not happening at all, you should try the usual debugging steps of restarting Studio with File -> Invalidate Caches / Restart, cleaning and rebuilding your project, etc. Perhaps try pulling the GitHub repo to a new location and see if that builds for you - the code isn't the problem.
Related
I am attempting to use this library for dependency injection within my Kotlin Multiplatform project - https://github.com/corbella83/PopKorn
The library is based on kapt and the Android part works perfectly! However, I'm struggling to understand why iOS doesn't seem to be working (I have filed an issue on their end but wanted to ask here in case I'm issing something obvious).
I have a vanilla KMM project out-of-the-box from the KMM Android Studio plugin with the following dependency-related setup:
// In shared/build.gradle.kts
kotlin {
...
sourceSets {
val commonMain by getting {
dependencies {
implementation("cc.popkorn:popkorn:2.1.1")
}
}
}
}
dependencies {
"kapt" ("cc.popkorn:popkorn-compiler:2.1.1") <- SHOULD THIS BE HERE?
}
// In androidApp/build.gradle.kts
dependencies {
implementation("cc.popkorn:popkorn:2.1.1")
}
// In commonMain source set
#Injectable
class Greeting {
fun greeting(): String {
return "Hello, ${Platform().platform}!"
}
}
// In MainActivity.kt
val greeting by popkorn<Greeting>() <- WORKS!
// In iosMain/Bridge.kt
fun init(creator: (ObjCClass) -> Mapping) = cc.popkorn.setup(creator)
fun getInjector() = InjectorObjC(popKorn())
// In iosApp
#main
struct iOSApp: App {
init() {
BridgeKt.doInit { (clazz) -> PopkornMapping in
return clazz.alloc() as! PopkornMapping
}
}
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
// In ContentView.swift
let greet = (BridgeKt.getInjector().inject(clazz: Greeting.self) as! Greeting).greeting()
The error I have is Could not find Provider for this class: com.example.myapplication.Greeting. Did you forget to add #Injectable? which is clearly not true as I do have the annotation.
My concern is that when android compiles I can see some logs related to annotation generation with PopKorn, however I do not see this when I build the iOS app using the following Run Script (the default when a new project is created):
./gradlew :shared:embedAndSignAppleFrameworkForXcode
Is there any additional setup required for kapt to work on iOS?
I ended up using a different library for dependency injection for Kotlin Multiplatform (Kodein) but for what it's worth I thought it'd be helpful for anyone having similar issues to know how I resolved it. The key was to expose the generated code to Swift using this:
val iosMain by getting {
...
kotlin.srcDir("${buildDir.absolutePath}/generated/source/kaptKotlin/")
}
After this the injection from Swift worked as it was meant to. However, I ended up having more issues trying to inject things from multiple modules and felt Kodein has better support for what I'm trying to do at the moment.
I want to make a simple http server using ktor. However, when I enter the site (127.0.0.1:8080 or 0.0.0.0:8080), it just isn't there. It doesn't print and doesn't respond.
However if I use NanoHttpd instead of ktor, everything works fine. What is my issue?
import io.ktor.application.call
import io.ktor.http.ContentType
import io.ktor.response.respondText
import io.ktor.routing.get
import io.ktor.routing.routing
import io.ktor.server.engine.embeddedServer
import io.ktor.server.netty.Netty
fun main() {
val server = embeddedServer(Netty, port = 8080) {
routing {
get("/") {
println("TEST")
call.respondText("Hello World!", ContentType.Text.Plain)
}
}
}
server.start(wait = true)
}
The output is just:
[main] INFO ktor.application - No ktor.deployment.watch patterns specified, automatic reload is not active
[main] INFO ktor.application - Responding at http://0.0.0.0:8080
It could be one of the following things:
The application code
The run configuration
I am leaning towards there being a problem with the run configuration rather than the application code.
Application code
Even though I think your issue is with the run configuration, in case that it isn't, I'm providing sample code here.
When I use the IntelliJ Ktor plugin, the Ktor app is bootstrapped as follows:
Application.kt
package com.example
import io.ktor.application.*
import io.ktor.http.*
import io.ktor.response.*
import io.ktor.routing.*
fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)
#kotlin.jvm.JvmOverloads
#Suppress("unused") // Referenced in application.conf
fun Application.module(testing: Boolean = false) {
routing {
get("/") {
call.respondText("Hello, world!", ContentType.Text.Plain)
}
}
}
application.conf
ktor {
deployment {
port = 8080
port = ${?PORT}
}
application {
modules = [ com.example.ApplicationKt.module ]
}
}
I've provided an example Ktor code base here: https://gitlab.com/tinacious/ktor-example
Run configuration
It could be your run configuration in IntelliJ. It needs to be set up as a Kotlin script (and not an Application). When it's set up as an Application, I get the same error you do. Here is how to set up the run configuration I have, allowing me to run the server in IntelliJ:
Add a configuration
Choose Kotlin script from the Templates section. Do not choose Application.
Near the bottom where it says "Use classpath of module" choose your application.main.
Near the top where it says "Main class" you should be able to choose your main application. I found this only showed up after I chose the classpath of the module.
Here are the relevant sections in the configuration:
Here is what I describe in step 4, i.e. I can choose my main class after the class path is added:
The run symbol should be a Kotlin logo:
I would recommend installing the IntelliJ Ktor plugin for bootstrapping your project. It uses Gradle and bootstraps everything so when you run ./gradlew run, you are running it properly and can access it without the manual build configuration step.
Seems like I can't access shouldMatchJson matcher from Kotlintest v3.4.2 the way is documented in https://github.com/kotlintest/kotlintest/blob/master/doc/matchers.md.
I get unresolved reference and I seem unable to import it. The code says it's an extension method to String class but tried with strings and even """{}""" but can't access that method. Am I doing something wrong? All other matchers are ok.
class Test : StringSpec ({
"Test a json" {
"{}".shouldMatchJson("{}")
}
})
Could it be that you are missing the import for the json extension?
I have this in my build.gradle:
testImplementation "io.kotlintest:kotlintest-assertions-json:3.4.2"
I am trying to use micronaut from Kotlin. I have this:
package me.test
import io.micronaut.http.MediaType
import io.micronaut.http.annotation.Controller
import io.micronaut.http.annotation.Get
import io.micronaut.http.annotation.Produces
#Controller("/hello")
class Controller() {
#Get("/")
#Produces(MediaType.TEXT_PLAIN)
fun ping(): String {
return "hello world"
}
}
package me.test
import io.micronaut.runtime.Micronaut
object Application {
#JvmStatic
fun main(args: Array<String>) {
Micronaut.build()
.packages("me.test")
.mainClass(Application.javaClass)
.start()
}
}
I wrote the following controller test:
package me.test
import io.micronaut.http.client.RxHttpClient
import io.micronaut.http.client.annotation.Client
import io.micronaut.test.annotation.MicronautTest
import org.junit.jupiter.api.Test
import javax.inject.Inject
#MicronautTest(application = Application::class)
class ControllerTest {
#Inject
#field:Client("/")
private lateinit var client: RxHttpClient
#Test
fun `should server ping with a pong`() {
val result = client.toBlocking().retrieve("/hello")
println(result)
}
}
but the test fails with a HttpClientResponseException: Page Not Found.
I have debugged this and from what I can tell, during the test, in DefaultBeanContext.getBeanDefinitions it doesn't find any beans for the #Controller qualifier. When I start the application using my Application class, I can see that it finds the Controller and makes the route available.
This is pretty much the Hello World for Micronaut, I am not sure what's going wrong here.
I think this is purely IDE related. I have Intellij set up to use Annotation Processors, to delegate builds to Gradle and to use the Gradle Test Runner. However, you also need to delete any existing test configurations and then the problem goes away.
When I try to use either cold or hot functions from jasmine-marbles, I keep getting TypeError: Class constructor Observable cannot be invoked without 'new'. Anybody know how to resolve this error? Here is what I have below.
import { hot, cold } from "jasmine-marbles";
import { Observable } from "rxjs/Observable";
const myAction = hot("--a-", { a: "TEST" };
I started to get this error after i changed "target" property in tsconfig.json (at project root) to "es6", thus i restored to old good "es5"