Initialise a Scala Play project with a MongoDB controller for Feed Service

What does this MR do?

• Initialises a Scala Play project for the Feed Service
• Adds a MongoDB Controller that abstracts useful MongoDB functions from the Scala Driver for testing.
• Adds dockerisation for the service.

Testing (w/out Docker)

Scala-Play Requirements

To run a Scala Play project locally on Unix system, use the following instruction:

• Download SDKMAN using curl -s "https://get.sdkman.io" | bash
• From the available JDK distributions, download the Amazon Corretto OpenJDK v11.0.18 using sdk install java 11.0.18-amzn
• Ensure it is installed by running java -version, you should see the following:

openjdk version "11.0.18" 2023-01-17 LTS
OpenJDK Runtime Environment Corretto-11.0.18.10.1 (build 11.0.18+10-LTS)
OpenJDK 64-Bit Server VM Corretto-11.0.18.10.1 (build 11.0.18+10-LTS, mixed mode)

• Install sbt with SDKMAN: sdk install sbt

You should now be ready to run a Scala Play application.

MongoDB Perquisites

• Ensure a local MongoDB service is running on your computer (Guide).
• (Optional) Install MongoDB Compass for a simple MongoDB UI.
• Create a database.
• Create a collection.
• Add a few records to the collection.

MongoDB Endpoint Test

• In backend-services/feed-service/MongoTestController, update lines 25-26 with your chosen database/collection names.
• In a terminal, navigate to backend-services/feed-service/
• Run sbt run.
• Navigate to http://localhost:9000/mongo_test.
• A list of the records in collection appear on site.

Testing (with Docker)

• Ensure Docker is installed and running.
• Run the following command in the root directory: docker-compose up --build
• Create a database.
• Create a collection.
• Add a few records to the collection.
• After services load and creating records, navigate to http://localhost:9001/mongo_test.
• A list of the records in collection appear on site.

Relevant issues

Closes #17 (closed). Closes #18 (closed).

backend-services/feed-service/.g8/form/app/controllers/$model__Camel$Controller.scala

+package controllers
+
+import javax.inject._
+import play.api.mvc._
+
+import play.api.data._
+import play.api.data.Forms._
+
+case class $model;format="Camel"$Data(name: String, age: Int)
+
+// NOTE: Add the following to conf/routes to enable compilation of this class:
+/*
+GET     /$model;format="camel"$        controllers.$model;format="Camel"$Controller.$model;format="camel"$Get()
+POST    /$model;format="camel"$        controllers.$model;format="Camel"$Controller.$model;format="camel"$Post()
+*/
+
+/**
+ * $model;format="Camel"$ form controller for Play Scala
+ */
+class $model;format="Camel"$Controller @Inject()(mcc: MessagesControllerComponents) extends MessagesAbstractController(mcc) {
+
+  val $model;format="camel"$Form = Form(
+    mapping(
+      "name" -> text,
+      "age" -> number
+    )($model;format="Camel"$Data.apply)($model;format="Camel"$Data.unapply)
+  )
+
+  def $model;format="camel"$Get() = Action { implicit request: MessagesRequest[AnyContent] =>
+    Ok(views.html.$model;format="camel"$.form($model;format="camel"$Form))
+  }
+
+  def $model;format="camel"$Post() = Action { implicit request: MessagesRequest[AnyContent] =>
+    $model;format="camel"$Form.bindFromRequest().fold(
+      formWithErrors => {
+        // binding failure, you retrieve the form containing errors:
+        BadRequest(views.html.$model;format="camel"$.form(formWithErrors))
+      },
+      $model;format="camel"$Data => {
+        /* binding success, you get the actual value. */       
+        /* flashing uses a short lived cookie */ 
+        Redirect(routes.$model;format="Camel"$Controller.$model;format="camel"$Get()).flashing("success" -> ("Successful " + $model;format="camel"$Data.toString))
+      }
+    )
+  }
+}