1 files changed, 12 insertions, 13 deletions

diff --git a/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java b/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java
index 7849abff9..2d105af3e 100644
--- a/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java
+++ b/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java
@@ -16,10 +16,13 @@
 package org.traccar.handler.events;
 
 import io.netty.channel.ChannelHandler;
-import org.traccar.database.IdentityManager;
+import org.traccar.config.Keys;
+import org.traccar.helper.model.AttributeUtil;
+import org.traccar.helper.model.PositionUtil;
 import org.traccar.model.Device;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
+import org.traccar.session.cache.CacheManager;
 
 import javax.inject.Inject;
 import java.util.Collections;
@@ -28,31 +31,28 @@ import java.util.Map;
 @ChannelHandler.Sharable
 public class FuelDropEventHandler extends BaseEventHandler {
 
-    public static final String ATTRIBUTE_FUEL_DROP_THRESHOLD = "fuelDropThreshold";
-
-    private final IdentityManager identityManager;
+    private final CacheManager cacheManager;
 
     @Inject
-    public FuelDropEventHandler(IdentityManager identityManager) {
-        this.identityManager = identityManager;
+    public FuelDropEventHandler(CacheManager cacheManager) {
+        this.cacheManager = cacheManager;
     }
 
     @Override
     protected Map<Event, Position> analyzePosition(Position position) {
 
-        Device device = identityManager.getById(position.getDeviceId());
+        Device device = cacheManager.getObject(Device.class, position.getDeviceId());
         if (device == null) {
             return null;
         }
-        if (!identityManager.isLatestPosition(position)) {
+        if (!PositionUtil.isLatest(cacheManager, position)) {
             return null;
         }
 
-        double fuelDropThreshold = identityManager
-                .lookupAttributeDouble(device.getId(), ATTRIBUTE_FUEL_DROP_THRESHOLD, 0, true, false);
-
+        double fuelDropThreshold = AttributeUtil.lookup(
+                cacheManager, Keys.EVENT_FUEL_DROP_THRESHOLD, position.getDeviceId());
         if (fuelDropThreshold > 0) {
-            Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+            Position lastPosition = cacheManager.getPosition(position.getDeviceId());
             if (position.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)
                     && lastPosition != null && lastPosition.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)) {
 
@@ -60,7 +60,6 @@ public class FuelDropEventHandler extends BaseEventHandler {
                         - position.getDouble(Position.KEY_FUEL_LEVEL);
                 if (drop >= fuelDropThreshold) {
                     Event event = new Event(Event.TYPE_DEVICE_FUEL_DROP, position);
-                    event.set(ATTRIBUTE_FUEL_DROP_THRESHOLD, fuelDropThreshold);
                     return Collections.singletonMap(event, position);
                 }
             }