2 * Copyright (c) 2010-2023 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.binding.mqtt.discovery;
15 import org.eclipse.jdt.annotation.NonNullByDefault;
16 import org.openhab.core.io.transport.mqtt.MqttBrokerConnection;
17 import org.openhab.core.thing.ThingUID;
20 * Implement this interface to get notified of received values and vanished topics.
22 * @author David Graeff - Initial contribution
25 public interface MQTTTopicDiscoveryParticipant {
27 * Called whenever a message on the subscribed topic got published or a retained message was received.
29 * @param thingUID The MQTT thing UID of the Thing that established/created the given broker connection.
30 * @param connection The broker connection
31 * @param topic The topic
32 * @param payload The topic payload
34 void receivedMessage(ThingUID thingUID, MqttBrokerConnection connection, String topic, byte[] payload);
37 * A MQTT topic vanished.
39 * @param thingUID The MQTT thing UID of the Thing that established/created the given broker connection.
40 * @param connection The broker connection
41 * @param topic The topic
43 void topicVanished(ThingUID thingUID, MqttBrokerConnection connection, String topic);