/* * Copyright 2016 - 2018 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.events; import java.util.Collections; import java.util.Map; import io.netty.channel.ChannelHandler; import org.traccar.BaseEventHandler; import org.traccar.Context; import org.traccar.model.Event; import org.traccar.model.Position; @ChannelHandler.Sharable public class AlertEventHandler extends BaseEventHandler { private final boolean ignoreDuplicateAlerts; public AlertEventHandler() { ignoreDuplicateAlerts = Context.getConfig().getBoolean("event.ignoreDuplicateAlerts"); } @Override protected Map<Event, Position> analyzePosition(Position position) { Object alarm = position.getAttributes().get(Position.KEY_ALARM); if (alarm != null) { boolean ignoreAlert = false; if (ignoreDuplicateAlerts) { Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId()); if (lastPosition != null && alarm.equals(lastPosition.getAttributes().get(Position.KEY_ALARM))) { ignoreAlert = true; } } if (!ignoreAlert) { Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId()); event.set(Position.KEY_ALARM, (String) alarm); return Collections.singletonMap(event, position); } } return null; } }