1 files changed, 63 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/handler/events/BehaviorEventHandler.java b/src/main/java/org/traccar/handler/events/BehaviorEventHandler.java
new file mode 100644
index 000000000..767cef3f6
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/BehaviorEventHandler.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2021 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.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.handler.events;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.util.Collections;
+import java.util.Map;
+
+@ChannelHandler.Sharable
+public class BehaviorEventHandler extends BaseEventHandler {
+
+    private final double accelerationThreshold;
+    private final double brakingThreshold;
+
+    private final IdentityManager identityManager;
+
+    public BehaviorEventHandler(Config config, IdentityManager identityManager) {
+        accelerationThreshold = config.getDouble(Keys.EVENT_BEHAVIOR_ACCELERATION_THRESHOLD);
+        brakingThreshold = config.getDouble(Keys.EVENT_BEHAVIOR_BRAKING_THRESHOLD);
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+
+        Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+        if (lastPosition != null && position.getFixTime().equals(lastPosition.getFixTime())) {
+            double acceleration = UnitsConverter.mpsFromKnots(position.getSpeed() - lastPosition.getSpeed()) * 1000
+                    / (position.getFixTime().getTime() - lastPosition.getFixTime().getTime());
+            if (accelerationThreshold != 0 && acceleration >= accelerationThreshold) {
+                Event event = new Event(Event.TYPE_ALARM, position);
+                event.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                return Collections.singletonMap(event, position);
+            } else if (brakingThreshold != 0 && acceleration <= -brakingThreshold) {
+                Event event = new Event(Event.TYPE_ALARM, position);
+                event.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                return Collections.singletonMap(event, position);
+            }
+        }
+        return null;
+    }
+
+}