mica-mqtt-client-spring-boot-starter 使用文档

<dependency>
    <groupId>net.dreamlu</groupId>
    <artifactId>mica-mqtt-client-spring-boot-starter</artifactId>
    <version>${最新版本}</version>
</dependency>

mqtt:
  client:
    enabled: true               # 是否开启客户端，默认：true
    ip: 127.0.0.1               # 连接的服务端 ip ，默认：127.0.0.1
    port: 1883                  # 端口：默认：1883
    name: Mica-Mqtt-Client      # 名称，默认：Mica-Mqtt-Client
    client-id: 000001           # 客户端Id（非常重要，一般为设备 sn，不可重复）
    user-name: mica             # 认证的用户名
    password: 123456            # 认证的密码
    global-subscribe:           # 全局订阅的 topic，可被全局监听到，保留 session 停机重启，依然可以接受到消息。（2.2.9开始支持）
    timeout: 5                  # 超时时间，单位：秒，默认：5秒
    reconnect: true             # 是否重连，默认：true
    re-interval: 5000           # 重连时间，默认 5000 毫秒
    version: mqtt_3_1_1         # mqtt 协议版本，可选 MQTT_3_1、mqtt_3_1_1、mqtt_5，默认：mqtt_3_1_1
    read-buffer-size: 8KB       # 接收数据的 buffer size，默认：8k
    max-bytes-in-message: 10MB  # 消息解析最大 bytes 长度，默认：10M
    buffer-allocator: heap      # 堆内存和堆外内存，默认：堆内存
    keep-alive-secs: 60         # keep-alive 时间，单位：秒
    clean-session: true         # mqtt clean session，默认：true
    ssl:
      enabled: false            # 是否开启 ssl 认证，2.1.0 开始支持双向认证
      keystore-path:            # 可选参数：ssl 双向认证 keystore 目录，支持 classpath:/ 路径。
      keystore-pass:            # 可选参数：ssl 双向认证 keystore 密码
      truststore-path:          # 可选参数：ssl 双向认证 truststore 目录，支持 classpath:/ 路径。
      truststore-pass:          # 可选参数：ssl 双向认证 truststore 密码

/**
 * 示例：客户端连接状态监听
 *
 * @author L.cm
 */
@Service
public class MqttClientConnectListener {
    private static final Logger logger = LoggerFactory.getLogger(MqttClientConnectListener.class);

    @Autowired
    private MqttClientCreator mqttClientCreator;

    @EventListener
    public void onConnected(MqttConnectedEvent event) {
        logger.info("MqttConnectedEvent:{}", event);
    }

    @EventListener
    public void onDisconnect(MqttDisconnectEvent event) {
        // 离线时更新重连时的密码，适用于类似阿里云 mqtt clientId 连接带时间戳的方式 
        logger.info("MqttDisconnectEvent:{}", event);
        // 在断线时更新 clientId、username、password
        mqttClientCreator.clientId("newClient" + System.currentTimeMillis())
            .username("newUserName")
            .password("newPassword");
    }

}

@Configuration(proxyBeanMethods = false)
public class MqttClientCustomizerConfiguration {

	@Bean
	public MqttClientCustomizer mqttClientCustomizer() {
		return new MqttClientCustomizer() {
			@Override
			public void customize(MqttClientCreator creator) {
				// 此处可自定义配置 creator，会覆盖 yml 中的配置
				System.out.println("----------------MqttServerCustomizer-----------------");
			}
		};
	}

}

@Service
public class MqttClientSubscribeListener {
	private static final Logger logger = LoggerFactory.getLogger(MqttClientSubscribeListener.class);

	@MqttClientSubscribe("/test/#")
	public void subQos0(String topic, byte[] payload) {
		logger.info("topic:{} payload:{}", topic, new String(payload, StandardCharsets.UTF_8));
	}

	@MqttClientSubscribe(value = "/qos1/#", qos = MqttQoS.AT_LEAST_ONCE)
	public void subQos1(String topic, byte[] payload) {
		logger.info("topic:{} payload:{}", topic, new String(payload, StandardCharsets.UTF_8));
	}

	@MqttClientSubscribe("/sys/${productKey}/${deviceName}/thing/sub/register")
	public void thingSubRegister(String topic, byte[] payload) {
		// 1.3.8 开始支持，@MqttClientSubscribe 注解支持 ${} 变量替换，会默认替换成 +
		// 注意：mica-mqtt 会先从 Spring boot 配置中替换参数 ${}，如果存在配置会优先被替换。
		logger.info("topic:{} payload:{}", topic, new String(payload, StandardCharsets.UTF_8));
	}

}

import net.dreamlu.iot.mqtt.spring.client.MqttClientTemplate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;

/**
 * @author wsq
 */
@Service
public class MainService {
    private static final Logger logger = LoggerFactory.getLogger(MainService.class);
    @Autowired
    private MqttClientTemplate client;

    public boolean publish() {
        client.publish("/test/client", "mica最牛皮".getBytes(StandardCharsets.UTF_8));
        return true;
    }

    public boolean sub() {
        client.subQos0("/test/#", (context, topic, message, payload) -> {
            logger.info(topic + '\t' + new String(payload, StandardCharsets.UTF_8));
        });
        return true;
    }

}

@Configuration
public class OtherMqttClientConfiguration {

	@Bean("mqttClientTemplate1")
	public MqttClientTemplate mqttClientTemplate1() {
		MqttClientCreator mqttClientCreator1 = MqttClient.create()
			.ip("mqtt.dreamlu.net")
			.username("mica")
			.password("mica");
		return new MqttClientTemplate(mqttClientCreator1);
	}

}

@Autowired
@Qualifier(MqttClientTemplate.DEFAULT_CLIENT_TEMPLATE_BEAN)
private MqttClientTemplate mqttClientTemplate;

@Autowired
@Qualifier("mqttClientTemplate1")
private MqttClientTemplate mqttClientTemplate;

@MqttClientSubscribe(
    value = "/#", 
    clientTemplateBean = "mqttClientTemplate1"
)
public void sub1(String topic, byte[] payload) {
    logger.info("topic:{} payload:{}", topic, ByteBufferUtil.toString(payload));
}