DataSource.kt

import clean.architecture.example.data.model.Post

interface PostDataSource {

    interface LoadPostsCallback {
        fun onPostsLoaded(posts: List<Post>)
        fun onError(t: Throwable)
    }

    interface SaveTaskCallback {
        fun onSaveSuccess()
        fun onError(t: Throwable)
    }

    fun getPosts(userId: Int, callback: LoadPostsCallback)
    fun savePost(post: Post)
}