finnkvan

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

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finnkvan

FWIW: I'm not the author of the content presented here (which is an outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.

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Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

finnkvan

class MainFragment : androidx.fragment.app.Fragment() {

    companion object {
        fun newInstance() = MainFragment()
    }

    private lateinit var viewModel: MainViewModel
    private lateinit var message: TextView

    override fun onCreateView(

finnkvan

import retrofit2.Response

internal const val UNKNOWN_CODE = -1

sealed class ApiResponse<T> {
    companion object {
        fun <T> create(response: Response<T>): ApiResponse<T> {
            return if (response.isSuccessful) {
                val body = response.body()
                if (body == null || response.code() == 204) {

finnkvan

class RetrofitClient {
    fun getRetrofit(): Retrofit {
        return Retrofit.Builder()
            .baseUrl("https://pokeapi.co/api/v2/")
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(LiveDataCallAdapterFactory())
            .build()
    }
}

finnkvan

class LiveDataCallAdapterFactory: CallAdapter.Factory() {
    override fun get(returnType: Type, annotations: Array<Annotation>, retrofit: Retrofit): CallAdapter<*, *>? {
        val observableType =
            CallAdapter.Factory.getParameterUpperBound(0, returnType as ParameterizedType) as? ParameterizedType
                ?: throw IllegalArgumentException("resource must be parameterized")
        return LiveDataCallAdapter<Any>(CallAdapter.Factory.getParameterUpperBound(0, observableType))
    }
}

finnkvan

class LiveDataCallAdapter<R>(private val responseType: Type): CallAdapter<R, LiveData<ApiResponse<R>>> {
    override fun adapt(call: Call<R>): LiveData<ApiResponse<R>> {
        return object : LiveData<ApiResponse<R>>() {
            private var isSuccess = false

            override fun onActive() {
                super.onActive()
                if (!isSuccess) enqueue()
            }

finnkvan

interface PokeApi {
    @GET("characteristic/{id}")
    fun getCharacteristic(@Path("id") id: Int): LiveData<PokeCharacteristic>
}

finnkvan

// Copyright: https://developer.android.com/topic/libraries/architecture/livedata
class NameViewModel : ViewModel() {

    // Create a LiveData with a String
    val currentName: MutableLiveData<String> by lazy {
        MutableLiveData<String>()
    }

    // Rest of the ViewModel...
}

finnkvan

package com.pivincii;

public class Counter {
    private volatile int count = 0;

    public void increment() {
        count ++;
    }

    public void decrement() {