4 files changed, 23 insertions, 8 deletions
diff --git a/src/org/traccar/BasePipelineFactory.java b/src/org/traccar/BasePipelineFactory.java
index 1bf8576ce..5e194c856 100644
--- a/src/org/traccar/BasePipelineFactory.java
+++ b/src/org/traccar/BasePipelineFactory.java
@@ -58,7 +58,6 @@ public abstract class BasePipelineFactory extends ChannelInitializer<Channel> {
     private boolean eventsEnabled;
     private int timeout;
 
-    private AlertEventHandler alertEventHandler;
     private IgnitionEventHandler ignitionEventHandler;
     private MaintenanceEventHandler maintenanceEventHandler;
     private DriverEventHandler driverEventHandler;
@@ -72,7 +71,6 @@ public abstract class BasePipelineFactory extends ChannelInitializer<Channel> {
         }
 
         if (eventsEnabled) {
-            alertEventHandler = new AlertEventHandler();
             ignitionEventHandler = new IgnitionEventHandler();
             maintenanceEventHandler = new MaintenanceEventHandler();
             driverEventHandler = new DriverEventHandler();
@@ -157,7 +155,7 @@ public abstract class BasePipelineFactory extends ChannelInitializer<Channel> {
                     Main.getInjector().getInstance(FuelDropEventHandler.class),
                     Main.getInjector().getInstance(MotionEventHandler.class),
                     Main.getInjector().getInstance(GeofenceEventHandler.class),
-                    alertEventHandler,
+                    Main.getInjector().getInstance(AlertEventHandler.class),
                     ignitionEventHandler,
                     maintenanceEventHandler,
                     driverEventHandler);
diff --git a/src/org/traccar/MainModule.java b/src/org/traccar/MainModule.java
index fd49fe3b5..3f196972f 100644
--- a/src/org/traccar/MainModule.java
+++ b/src/org/traccar/MainModule.java
@@ -57,6 +57,7 @@ import org.traccar.handler.GeolocationHandler;
 import org.traccar.handler.HemisphereHandler;
 import org.traccar.handler.MotionHandler;
 import org.traccar.handler.RemoteAddressHandler;
+import org.traccar.handler.events.AlertEventHandler;
 import org.traccar.handler.events.CommandResultEventHandler;
 import org.traccar.handler.events.FuelDropEventHandler;
 import org.traccar.handler.events.GeofenceEventHandler;
@@ -320,6 +321,12 @@ public class MainModule extends AbstractModule {
         return new GeofenceEventHandler(identityManager, geofenceManager, calendarManager);
     }
 
+    @Singleton
+    @Provides
+    public static AlertEventHandler provideAlertEventHandler(Config config, IdentityManager identityManager) {
+        return new AlertEventHandler(config, identityManager);
+    }
+
     @Override
     protected void configure() {
         binder().requireExplicitBindings();
diff --git a/src/org/traccar/config/Keys.java b/src/org/traccar/config/Keys.java
index c7c5d16c6..48cf3e558 100644
--- a/src/org/traccar/config/Keys.java
+++ b/src/org/traccar/config/Keys.java
@@ -64,6 +64,12 @@ public final class Keys {
             "event.overspeed.preferLowest", Boolean.class);
 
     /**
+     * Do not generate alert event if same alert was present in last known location.
+     */
+    public static final ConfigKey EVENT_IGNORE_DUPLICATE_ALERTS = new ConfigKey(
+            "event.ignoreDuplicateAlerts", Boolean.class);
+
+    /**
      * List of external handler classes to use in Netty pipeline.
      */
     public static final ConfigKey EXTRA_HANDLERS = new ConfigKey(
diff --git a/src/org/traccar/handler/events/AlertEventHandler.java b/src/org/traccar/handler/events/AlertEventHandler.java
index 09a6e2b6b..0b7c8d23e 100644
--- a/src/org/traccar/handler/events/AlertEventHandler.java
+++ b/src/org/traccar/handler/events/AlertEventHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,17 +19,21 @@ import java.util.Collections;
 import java.util.Map;
 
 import io.netty.channel.ChannelHandler;
-import org.traccar.Context;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
 
 @ChannelHandler.Sharable
 public class AlertEventHandler extends BaseEventHandler {
 
+    private final IdentityManager identityManager;
     private final boolean ignoreDuplicateAlerts;
 
-    public AlertEventHandler() {
-        ignoreDuplicateAlerts = Context.getConfig().getBoolean("event.ignoreDuplicateAlerts");
+    public AlertEventHandler(Config config, IdentityManager identityManager) {
+        this.identityManager = identityManager;
+        ignoreDuplicateAlerts = config.getBoolean(Keys.EVENT_IGNORE_DUPLICATE_ALERTS);
     }
 
     @Override
@@ -38,7 +42,7 @@ public class AlertEventHandler extends BaseEventHandler {
         if (alarm != null) {
             boolean ignoreAlert = false;
             if (ignoreDuplicateAlerts) {
-                Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+                Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
                 if (lastPosition != null && alarm.equals(lastPosition.getAttributes().get(Position.KEY_ALARM))) {
                     ignoreAlert = true;
                 }