Added AppLoader and CassandraRepositoryComponents

app/AppLoader.scala

@@ -0,0 +1,22 @@
+import components.CassandraRepositoryComponents
+import play.api.ApplicationLoader.Context
+import play.api.routing.Router
+import play.api.{Application, ApplicationLoader, BuiltInComponentsFromContext}
+import router.Routes
+
+class AppLoader extends ApplicationLoader {
+  override def load(context: ApplicationLoader.Context): Application =
+    new AppComponents(context).application
+}
+
+class AppComponents(context: Context) extends BuiltInComponentsFromContext(context) with CassandraRepositoryComponents {
+
+  lazy val applicationController = new controllers.Application(productsRepository)
+  lazy val assets = new controllers.Assets(httpErrorHandler)
+
+  override def router: Router = new Routes(
+    httpErrorHandler,
+    applicationController,
+    assets
+  )
+}

app/components/CassandraRepositoryComponents.scala

@@ -0,0 +1,33 @@
+package components
+
+import cassandra.{CassandraConnector, CassandraConnectionUri}
+import com.datastax.driver.core.Session
+import models.ProductModel
+import play.api.inject.ApplicationLifecycle
+import play.api.{Configuration, Environment, Mode}
+import repositories.{Repository, ProductsRepository}
+import scala.concurrent.Future
+
+trait CassandraRepositoryComponents {
+  // These will be filled by Play's built-in components; should be `def` to avoid initialization problems
+  def environment: Environment
+  def configuration: Configuration
+  def applicationLifecycle: ApplicationLifecycle
+
+  lazy private val cassandraSession: Session = {
+    val uriString = environment.mode match {
+      case Mode.Prod  => "cassandra://localhost:9042/prod"
+      case _          => "cassandra://localhost:9042/test"
+    }
+    val session: Session = CassandraConnector.createSessionAndInitKeyspace(
+      CassandraConnectionUri(uriString)
+    )
+    // Shutdown the client when the app is stopped or reloaded
+    applicationLifecycle.addStopHook(() => Future.successful(session.close()))
+    session
+  }
+
+  lazy val productsRepository: Repository[ProductModel, Int] = {
+    new ProductsRepository(cassandraSession)
+  }
+}

conf/application.conf

@@ -1,6 +1,8 @@
 # This is the main configuration file for the application.
 # ~~~~~
 
+play.application.loader="AppLoader"
+
 # Secret key
 # ~~~~~
 # The secret key is used to secure cryptographics functions.