/* * Copyright 2021 - 2024 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 jakarta.inject.Inject; import org.traccar.config.Config; import org.traccar.config.Keys; import org.traccar.helper.UnitsConverter; import org.traccar.model.Event; import org.traccar.model.Position; import org.traccar.session.cache.CacheManager; public class BehaviorEventHandler extends BaseEventHandler { private final double accelerationThreshold; private final double brakingThreshold; private final CacheManager cacheManager; @Inject public BehaviorEventHandler(Config config, CacheManager cacheManager) { accelerationThreshold = config.getDouble(Keys.EVENT_BEHAVIOR_ACCELERATION_THRESHOLD); brakingThreshold = config.getDouble(Keys.EVENT_BEHAVIOR_BRAKING_THRESHOLD); this.cacheManager = cacheManager; } @Override public void analyzePosition(Position position, Callback callback) { Position lastPosition = cacheManager.getPosition(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); callback.eventDetected(event); } else if (brakingThreshold != 0 && acceleration <= -brakingThreshold) { Event event = new Event(Event.TYPE_ALARM, position); event.set(Position.KEY_ALARM, Position.ALARM_BRAKING); callback.eventDetected(event); } } } }