[Updated] Frontend now uses categories retrieved from the backend

backend/src/main/java/com/ninjaws/quiz/controllers/QuizController.java

@@ -1,5 +1,6 @@
 package com.ninjaws.quiz.controllers;
 
+import java.util.List;
 import java.util.Optional;
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -11,9 +12,11 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
+import com.ninjaws.quiz.entities.Category;
 import com.ninjaws.quiz.models.Answers;
 import com.ninjaws.quiz.models.QuizSettings;
 import com.ninjaws.quiz.models.Session;
+import com.ninjaws.quiz.services.DataService;
 import com.ninjaws.quiz.services.QuizService;
 
 @RestController
@@ -22,6 +25,8 @@ public class QuizController {
 
     @Autowired
     private QuizService quizService;
+    @Autowired
+    private DataService dataService;
 
 
     /**
@@ -69,4 +74,9 @@ public class QuizController {
         String jsonString = String.format("{\"score\":\"%s\"}", quizService.getScore(answers));
         return jsonString;
     }
+
+    @GetMapping("/categories")
+    public List<Category> getCategories(){
+        return dataService.getCategories();
+    }
 }

backend/src/main/java/com/ninjaws/quiz/services/DataService.java

@@ -50,6 +50,9 @@ public class DataService {
         return categoryRepository.saveAll(categories);
     }
 
+    public List<Category> getCategories(){
+        return categoryRepository.findAll();
+    }
     /**
      * Moving the collected questions to the questions list
      *

backend/src/main/java/com/ninjaws/quiz/services/QuizService.java

@@ -24,6 +24,8 @@ public class QuizService {
     private DataService dataService;
     @Autowired
     private CleanerService cleanerService;
+    @Autowired
+    private StateManagementService stateManager;
 
     /**
      * Actions:
@@ -38,19 +40,20 @@ public class QuizService {
 
         /** First, we check if there are already enough items in our db */
         List<QuestionEntity> questionsRetrieved = dataService.lookupQuestions(quizSettings);
+        /** If the items are not matching the required amount, and the db is not currently being filled up, then they simply don't exist */
+        if (questionsRetrieved.size() < quizSettings.getAmount() && stateManager.getCurrentProcessingState() != StateManagementService.ProcessingState.STARTUP) {
+            session.setStatusCode(1);
+            cacheService.addToCache(session.getId(), session);
+            return Optional.of(session.getId());
+        }
+        /** All items are collected in from the database, it doesn't need to be added to the queue */
         if(!questionsRetrieved.isEmpty() && questionsRetrieved.size() == quizSettings.getAmount()) {
             session.setQuestions(cleanerService.questionListEntitytoDTO(questionsRetrieved));
-        }
-
-        cacheService.addToCache(session.getId(), session);
-
-        /**
-         * If the questions were retrieved from the DB, then it doesn't need to be added to the queue
-         */
-        if(!questionsRetrieved.isEmpty() && questionsRetrieved.size() == quizSettings.getAmount()) {
+            cacheService.addToCache(session.getId(), session);
             return Optional.of(session.getId());
         }
 
+        cacheService.addToCache(session.getId(), session);
         boolean addedToQueue = queueService.addToQueue(new Request(session.getId(), quizSettings));
         /** In this order, because doing the queue before the cache could lead to race conditions (request completion immediately calls cache, but then the item doesn't exist) */
         if(!addedToQueue) {
@@ -75,16 +78,17 @@ public class QuizService {
             throw new IllegalArgumentException("Invalid session ID: " + sessionId);
         }
 
+        /** Anything other than statuscode 0 doesn't result in active sessions, so remove them from the cache after reporting to the frontend */
+        if(session.getStatusCode() != 0) {
+            cacheService.removeFromCache(session.getId());
+            return Optional.of(session);
+        }
+
         /** Still waiting for a response */
         if (session.getQuestions() == null) {
             return Optional.empty();
         }
 
-        /** Anything other than statuscode 0 doesn't result in active sessions, so remove them from the cache after reporting to the frontend */
-        // if(session.getStatusCode() != 0) {
-        /** Regardless of status code, this link is not reusable */
-        cacheService.removeFromCache(session.getId());
-        // }
 
         return Optional.of(session);
     }
@@ -93,7 +97,7 @@ public class QuizService {
      * Receives: sessionId and answers
      * 
      * Actions: 
-     * - retrieves session from cache
+     * - Retrieves session from cache
      * - Deletes session from cache
      * - Matches answers answers to correctAnswers
      * - Calculates score

backend/src/test/java/com/ninjaws/quiz/scala/QuestionStatusSimulation.scala

@@ -3,6 +3,7 @@ import io.gatling.core.Predef._
 import io.gatling.http.Predef._
 import scala.concurrent.duration._
 
+/** Does not work, use the LoadTestMultiple.sh in the /scripts folder in the root instead */
 class QuestionStatusSimulation extends Simulation {
     val httpProtocol = http.baseUrl("http://localhost:9090").acceptHeader("application/json")