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HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

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/*
 * Copyright 2018-present HiveMQ and the HiveMQ Community
 *
 * 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 com.hivemq.client.mqtt.mqtt3;

import com.hivemq.client.annotations.DoNotImplement;
import com.hivemq.client.mqtt.MqttClientConfig;
import com.hivemq.client.mqtt.mqtt3.message.auth.Mqtt3SimpleAuth;
import com.hivemq.client.mqtt.mqtt3.message.publish.Mqtt3Publish;
import org.jetbrains.annotations.NotNull;

import java.util.Optional;

/**
 * Configuration of an {@link Mqtt3Client}.
 *
 * @author Silvio Giebl
 * @since 1.0
 */
@DoNotImplement
public interface Mqtt3ClientConfig extends MqttClientConfig {

    @Override
    @NotNull Optional getConnectionConfig();

    /**
     * Returns the optional simple authentication and/or authorization related data of the client.
     * 
     * It is used as default if {@link com.hivemq.client.mqtt.mqtt3.message.connect.Mqtt3Connect#getSimpleAuth()
     * Mqtt3Connect.simpleAuth} is not set during connect.
     * 

     * Keep in mind that the data is stored with the client in memory. If you want to use it only during connect or if
     * you use a different token for each connection please set {@link com.hivemq.client.mqtt.mqtt3.message.connect.Mqtt3Connect#getSimpleAuth()
     * Mqtt3Connect.simpleAuth} instead.
     *
     * @return the optional simple authentication and/or authorization related data of the client.
     * @since 1.1
     */
    @NotNull Optional getSimpleAuth();

    /**
     * Returns the optional Will Publish of the client.
     * 

     * It is used as default if {@link com.hivemq.client.mqtt.mqtt3.message.connect.Mqtt3Connect#getWillPublish()
     * Mqtt3Connect.willPublish} is not set during connect.
     * 
     * Keep in mind that the Will Publish is stored with the client in memory. If you use a different Will Publish for
     * each connection please set {@link com.hivemq.client.mqtt.mqtt3.message.connect.Mqtt3Connect#getWillPublish()
     * Mqtt3Connect.willPublish} instead.
     *
     * @return the optional Will Publish of the client.
     * @since 1.1
     */
    @NotNull Optional getWillPublish();
}