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MqttSubscribingClientIdentifierFactory.java
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MqttSubscribingClientIdentifierFactory.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.subscribing;
import java.util.UUID;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.connectivity.model.Connection;
import org.eclipse.ditto.connectivity.model.ConnectionId;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.MqttSpecificConfig;
import org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.clients.MqttClientIdentifierFactory;
/**
* Factory for the {@link com.hivemq.client.mqtt.datatypes.MqttClientIdentifier} to be used for
* a {@link GenericMqttSubscribingClient}.
*/
@Immutable
final class MqttSubscribingClientIdentifierFactory extends MqttClientIdentifierFactory {
private MqttSubscribingClientIdentifierFactory(final MqttSpecificConfig mqttSpecificConfig,
final Connection connection,
final UUID actorUuid) {
super(mqttSpecificConfig, connection, actorUuid);
}
/**
* Returns a new instance of {@code MqttSubscribingClientIdentifierFactory} for the specified arguments.
*
* @param mqttSpecificConfig provides specific MQTT configuration properties that might be required for creating an
* MQTT client ID.
* @param mqttConnection MQTT connection that provides some properties which are required for creating an MQTT
* client ID.
* @param actorUuid UUID for making the MQTT client ID unique if necessary.
* @return the new instance.
* @throws NullPointerException if any argument is {@code null}.
*/
static MqttSubscribingClientIdentifierFactory newInstance(final MqttSpecificConfig mqttSpecificConfig,
final Connection mqttConnection,
final UUID actorUuid) {
return new MqttSubscribingClientIdentifierFactory(mqttSpecificConfig, mqttConnection, actorUuid);
}
@Override
protected String getBaseClientIdString(final MqttSpecificConfig mqttSpecificConfig,
final ConnectionId connectionId) {
return mqttSpecificConfig.getMqttClientId().orElseGet(() -> String.valueOf(connectionId));
}
}