Merge branch 'issue-2012' of dlab/hive

from pull-request 1434

* refs/heads/issue-2012:
  Enhanced performance for counting notifications
  Using raw sql to get user's notifications

Reviewed-by: 이응준 <eungjun.yi@navercorp.com>

app/models/NotificationEvent.java

@@ -20,6 +20,8 @@
  */
 package models;
 
+import com.avaje.ebean.RawSql;
+import com.avaje.ebean.RawSqlBuilder;
 import controllers.UserApp;
 import controllers.routes;
 import models.enumeration.*;
@@ -1020,12 +1022,29 @@ public static void onStart() {
      * @return
      */
     public static List<NotificationEvent> findByReceiver(User user, int from, int size) {
-        List<NotificationEvent> allEvents = user.notificationEvents;
-        int allEventsCount = allEvents.size();
-        if (allEventsCount <= from) {
-            return new ArrayList<>();
-        }
-        int to = (allEventsCount < from + size) ? allEventsCount : from + size;
-        return allEvents.subList(from, to);
+        String sql = "select t1.id, t1.title, t1.sender_id, t1.created, t1.resource_type, t1.resource_id, t1.event_type, " +
+                "t1.old_value, t1.new_value " +
+                "from n4user t0 " +
+                "left outer join notification_event_n4user t1z_ on t1z_.n4user_id = t0.id " +
+                "left outer join notification_event t1 on t1.id = t1z_.notification_event_id " +
+                "left outer join notification_mail t2 on t2.notification_event_id = t1.id " +
+                "where t0.id = " + user.id + " and t1.id IS NOT NULL " +
+                "order by t1.created DESC";
+
+        return find.setRawSql(RawSqlBuilder.parse(sql).create())
+                .setFirstRow(from)
+                .setMaxRows(size)
+                .findList();
+    }
+
+    public static int getNotificationsCount(User user) {
+        String sql = "select t1.id " +
+                "from n4user t0 " +
+                "left outer join notification_event_n4user t1z_ on t1z_.n4user_id = t0.id " +
+                "left outer join notification_event t1 on t1.id = t1z_.notification_event_id " +
+                "left outer join notification_mail t2 on t2.notification_event_id = t1.id " +
+                "where t0.id = " + user.id + " and t1.id IS NOT NULL ";
+
+        return find.setRawSql(RawSqlBuilder.parse(sql).create()).findList().size();
     }
 }

app/views/index/partial_notifications.scala.html

@@ -96,7 +96,7 @@
     }
 }
 
-@if(UserApp.currentUser.notificationEvents.size > size){
+@if(NotificationEvent.getNotificationsCount(UserApp.currentUser()) > size){
 <li><a href="javascript: void(0);" id="notification-more" class="ybtn">More</a></li>
 <script type="text/javascript">
     $(document).ready(function(){