SpringBoot集成mqtt启动就不断报已断开连接问题
踩坑记录，实在是天坑！！！
原因一：clientId相同，即clientId重复导致（不过我不是这个问题）
我的问题是：
项目启动成功后，控制台不停地反复输出：已断开连接，，，
加了重连机制后，则不停地输出：重连失败，已连接客户机，，，
尼玛，，关键点还在于我能接收到订阅的消息（不影响消息处理），这又是什么情况，明明没断连，确一直报已断开连接
百度了半天，愣是找不到对的方法
原因二：项目启动类用了ApplicationListener（就是这个原因，改为ApplicationRunner就行了）
附成功代码：：：
maven依赖
<!-- mqtt -->
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
</dependency>
yaml文件
#mqtt配置 mqtt: # 服务器连接地址，如果有多个，用逗号隔开 url: tcp://127.0.0.1:1883 # 连接服务器默认客户端ID clientId: ${random.value} # 主题 topics: topic-docker # 用户名 username: admin # 密码 password: admin # 连接超时 timeout: 30 # 保持活动间隔 keepalive: 60
mqtt配置类
package com.wt.mqtt; import lombok.Data; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; /** * mqtt信息 * * @author wt **/ @Data @Component public class MqttConfig { @Value("${mqtt.url}") private String url; @Value("${mqtt.clientId}") private String clientId; @Value("${mqtt.username}") private String username; @Value("${mqtt.password}") private String password; @Value("${mqtt.topics}") private String subtopic; @Value("${mqtt.timeout}") private Integer timeout; @Value("${mqtt.keepalive}") private Integer keepalive; }
mqtt启动类
package com.hzzcdz.job.mqtt;
import lombok.extern.slf4j.Slf4j;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
/**
* 项目启动 订阅主题
*
* @author wangtao
*/
@Slf4j
@Component
public class MqttManager implements ApplicationRunner {
@Resource
private MqttConfig mqttConfig;
@Resource
private MyCallback callback;
private final MqttConnect server;
@Autowired
public MqttManager(MqttConnect server) {
this.server = server;
}
@Override
public void run(ApplicationArguments args) {
try {
server.setMqttClient(mqttConfig.getUsername(), mqttConfig.getPassword(), callback);
server.sub(mqttConfig.getSubtopic());
log.info("MQTT启动连接成功！");
log.info("订阅的主题是 : " + mqttConfig.getSubtopic());
} catch (MqttException e) {
log.error(e.getMessage(), e);
log.error("MQTT启动连接失败！");
}
}
}
mqtt连接工具类
package com.hzzcdz.job.mqtt; import lombok.extern.slf4j.Slf4j; import org.eclipse.paho.client.mqttv3.*; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; import org.springframework.stereotype.Component; import javax.annotation.Resource; /** * @author wt * MQTT工具类操作 */ @Slf4j @Component public class MqttConnect { @Resource private MqttConfig mqttConfig; private MqttClient mqttClient; /** * 客户端connect连接mqtt服务器 * * @param userName 用户名 * @param passWord 密码 * @param mqttCallback 回调函数 **/ public void setMqttClient(String userName, String passWord, MqttCallback mqttCallback) throws MqttException { MqttConnectOptions options = mqttConnectOptions(userName, passWord); mqttClient.setCallback(mqttCallback); mqttClient.connect(options); } /** * MQTT连接参数设置 */ private MqttConnectOptions mqttConnectOptions(String userName, String passWord) throws MqttException { mqttClient = new MqttClient(mqttConfig.getUrl(), mqttConfig.getClientId(), new MemoryPersistence()); MqttConnectOptions options = new MqttConnectOptions(); //用户名 options.setUserName(userName); //密码 options.setPassword(passWord.toCharArray()); //连接超时，默认：30 options.setConnectionTimeout(mqttConfig.getTimeout()); //自动重新连接，默认：false options.setAutomaticReconnect(false); //清理会话，默认：true options.setCleanSession(false); //保持活动间隔，默认：60 options.setKeepAliveInterval(mqttConfig.getKeepalive()); return options; } /** * 关闭MQTT连接 */ public void close() throws MqttException { mqttClient.close(); mqttClient.disconnect(); } /** * 重连 */ public void reConnect(String topic) { try { mqttClient.reconnect(); while (true) { if (mqttClient.isConnected()) { sub(topic); break; } else { Thread.sleep(10000); log.info("重连中，请稍后......"); } } log.info("MQTT连接成功，订阅成功.topic={}", topic); } catch (MqttException | InterruptedException e) { log.error("重连失败,失败原因{}", e.getMessage()); } } /** * 向某个主题发布消息 默认qos：1 * * @param topic:发布的主题 * @param msg：发布的消息 */ public void pub(String topic, String msg) throws MqttException { MqttMessage mqttMessage = new MqttMessage(); mqttMessage.setPayload(msg.getBytes()); MqttTopic mqttTopic = mqttClient.getTopic(topic); MqttDeliveryToken token = mqttTopic.publish(mqttMessage); token.waitForCompletion(); } /** * 向某个主题发布消息 * * @param topic: 发布的主题 * @param msg: 发布的消息 * @param qos: 消息质量 Qos：0、1、2 */ public void pub(String topic, String msg, int qos) throws MqttException { MqttMessage mqttMessage = new MqttMessage(); mqttMessage.setQos(qos); mqttMessage.setPayload(msg.getBytes()); MqttTopic mqttTopic = mqttClient.getTopic(topic); MqttDeliveryToken token = mqttTopic.publish(mqttMessage); token.waitForCompletion(); } /** * 订阅某一个主题 ，此方法默认的的Qos等级为：1 * * @param topic 主题 */ public void sub(String topic) throws MqttException { mqttClient.subscribe(topic); } /** * 订阅某一个主题，可携带Qos * * @param topic 所要订阅的主题 * @param qos 消息质量：0、1、2 */ public void sub(String topic, int qos) throws MqttException { log.info("订阅的主题是 : " + topic); log.info("订阅的Qos是 : " + qos); mqttClient.subscribe(topic, qos); } /** * 取消某个主题发布消息 */ public void unSub(String topic) { log.info("取消订阅的主题是 : " + topic); try { mqttClient.unsubscribe(topic); } catch (MqttException e) { throw new RuntimeException(e); } } }
mqtt回调函数类
package com.hzzcdz.job.mqtt; import lombok.extern.slf4j.Slf4j; import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken; import org.eclipse.paho.client.mqttv3.MqttCallback; import org.eclipse.paho.client.mqttv3.MqttMessage; import org.springframework.stereotype.Component; import javax.annotation.Resource; /** * MQTT回调函数 * * @author wt */ @Slf4j @Component public class MyCallback implements MqttCallback { @Resource private MqttConfig mqttConfig; @Resource private MqttConnect mqttConnect; /** * MQTT 断开连接会执行此方法 */ @Override public void connectionLost(Throwable throwable) { log.info("断开了MQTT连接 ：{}", throwable.getMessage()); log.error(throwable.getMessage(), throwable); mqttConnect.reConnect(mqttConfig.getSubtopic()); } /** * publish发布成功后会执行到这里 */ @Override public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) { log.info("发布消息成功"); } /** * subscribe订阅后得到的消息会执行到这里 */ @Override public void messageArrived(String topic, MqttMessage message) { // TODO 此处可以将订阅得到的消息进行业务处理、数据存储 log.info("收到来自 " + topic + " 的消息：{}", new String(message.getPayload())); //数据处理
} }
至此填上了坑！！！
