perf: make student task navigation read-only

src/main/java/com/sztzjy/linkCommerce/service/impl/TrainingTaskServiceImpl.java

@@ -25,6 +25,7 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import javax.annotation.PostConstruct;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -36,7 +37,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
@@ -70,7 +70,15 @@ public class TrainingTaskServiceImpl implements TrainingTaskService {
     private boolean trainingTaskClassConfigTableChecked = false;
     private volatile boolean defaultTasksInitialized = false;
     private final Object defaultTasksInitializationLock = new Object();
-    private final Set<String> initializedStudentClassTaskIds = ConcurrentHashMap.newKeySet();
+
+    /**
+     * Seed built-in task definitions during application startup so that opening
+     * a student's navigation never performs the initialization write path.
+     */
+    @PostConstruct
+    public void initializeDefaultTasksAtStartup() {
+        ensureDefaultTasks(null);
+    }
 
     @Override
     public List<TrainingTask> list(String projectName, String taskName, Boolean enabledOnly) {
@@ -315,7 +323,6 @@ public class TrainingTaskServiceImpl implements TrainingTaskService {
                     || (requiresExplicitPublication(normalizedTaskKey) && publishedTaskKeys == null)) {
                 return null;
             }
-            ensureStudentClassTasksInitialized(teachingClassId);
             TrainingTaskClassConfig classTask = trainingTaskClassConfigMapper.selectByTeachingClassAndTaskKey(teachingClassId, normalizedTaskKey);
             if (classTask != null) {
                 return Boolean.TRUE.equals(classTask.getEnabled()) ? toTask(classTask) : null;
@@ -345,8 +352,7 @@ public class TrainingTaskServiceImpl implements TrainingTaskService {
                     .filter(task -> !requiresExplicitPublication(task.getTaskKey()))
                     .collect(Collectors.toList()), enabledOnly);
         }
-        List<TrainingTaskClassConfig> classTasks = readStudentClassTasks(teachingClassId, defaults);
-        List<TrainingTask> tasks = filterEnabled(toTasks(classTasks), enabledOnly);
+        List<TrainingTask> tasks = filterEnabled(readClassTasks(teachingClassId, defaults), enabledOnly);
         Set<String> publishedTaskKeys = getPublishedTaskKeys(teachingClassId);
         if (publishedTaskKeys == null) {
             return tasks.stream()
@@ -487,23 +493,6 @@ public class TrainingTaskServiceImpl implements TrainingTaskService {
         return new ArrayList<>(existingByKey.values());
     }
 
-    private void ensureStudentClassTasksInitialized(String teachingClassId) {
-        if (StringUtils.isBlank(teachingClassId) || initializedStudentClassTaskIds.contains(teachingClassId)) {
-            return;
-        }
-        ensureClassTasksInitialized(teachingClassId, trainingTaskMapper.selectList(null, null, null), null);
-        initializedStudentClassTaskIds.add(teachingClassId);
-    }
-
-    private List<TrainingTaskClassConfig> readStudentClassTasks(String teachingClassId, List<TrainingTask> defaults) {
-        if (initializedStudentClassTaskIds.contains(teachingClassId)) {
-            return trainingTaskClassConfigMapper.selectListByTeachingClass(teachingClassId, null);
-        }
-        List<TrainingTaskClassConfig> classTasks = ensureClassTasksInitialized(teachingClassId, defaults, null);
-        initializedStudentClassTaskIds.add(teachingClassId);
-        return classTasks;
-    }
-
     private void synchronizeClassTaskDefaults(TrainingTask previousTask, TrainingTask updatedTask) {
         if (schoolClassMapper == null || trainingTaskClassConfigMapper == null
                 || previousTask == null || updatedTask == null) {