::mica-mqtt-client-solon-plugin
此系列插件,由社区成员(peigen)贡献
<dependency>
<groupId>net.dreamlu</groupId>
<artifactId>mica-mqtt-client-solon-plugin</artifactId>
<version>最新版本</version>
</dependency>
1、描述
本插件是完全基于mica-mqtt,是适用于Solon的插件。更详细的使用说明:
https://gitee.com/596392912/mica-mqtt/tree/master/starter/mica-mqtt-client-solon-plugin
2、配置项示例
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
clientId: 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
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
注意:ssl 存在三种情况
服务端开启ssl | 客户端 |
---|---|
ClientAuth 为 NONE(不需要客户端验证) | 仅仅需要开启 ssl 即可不用配置证书 |
ClientAuth 为 OPTIONAL(与客户端协商) | 需开启 ssl 并且配置 truststore 证书 |
ClientAuth 为 REQUIRE (必须的客户端验证) | 需开启 ssl 并且配置 truststore、 keystore证书 |
3、可实现接口(注册成 Solon Bean 即可)
接口 | 是否必须 | 说明 |
---|---|---|
IMqttClientConnectListener | 否 | 客户端连接成功监听 |
4、客户端上下线监听
使用 Solon event 解耦客户端上下线监听,注意: 会跟自定义的 IMqttClientConnectListener
实现冲突,取一即可。
@Component
public class MqttClientConnectedListener implements EventListener<MqttConnectedEvent> {
private static final Logger logger = LoggerFactory.getLogger(MqttClientConnectedListener.class);
@Inject
private MqttClientCreator mqttClientCreator;
@Override
public void onEvent(MqttConnectedEvent mqttConnectedEvent) throws Throwable {
logger.info("MqttConnectedEvent:{}", mqttConnectedEvent);
}
}
@Component
public class MqttClientDisconnectListener implements EventListener<MqttDisconnectEvent> {
private static final Logger logger = LoggerFactory.getLogger(MqttClientDisconnectListener.class);
@Inject
private MqttClientCreator mqttClientCreator;
@Override
public void onEvent(MqttDisconnectEvent mqttDisconnectEvent) throws Throwable {
logger.info("MqttDisconnectEvent:{}", mqttDisconnectEvent);
// 在断线时更新 clientId、username、password
mqttClientCreator.clientId("newClient" + System.currentTimeMillis())
.username("newUserName")
.password("newPassword");
}
}
5、自定义 java 配置(可选)
@Configuration
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-----------------");
}
};
}
}
6、订阅示例
/**
* 客户端消息监听
*/
@Component
public class MqttClientSubscribeListener {
private static final Logger logger = LoggerFactory.getLogger(MqttClientSubscribeListener.class);
@MqttClientSubscribe("/test/#")
public void subQos0(String topic, byte[] payload) {
logger.info("subQos0,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 ${},如果存在配置会优先被替换。
logger.info("topic:{} payload:{}", topic, new String(payload, StandardCharsets.UTF_8));
}
}
/**
* 客户端消息监听的另一种方式
*/
@MqttClientSubscribe("${topic1}")
public class MqttClientMessageListener implements IMqttClientMessageListener {
private static final Logger logger = LoggerFactory.getLogger(MqttClientMessageListener.class);
@Override
public void onMessage(ChannelContext context, String topic, MqttPublishMessage message, byte[] payload) {
logger.info("MqttClientMessageListener,topic:{} payload:{}", topic, new String(payload, StandardCharsets.UTF_8));
}
}
7、共享订阅 topic 说明
mica-mqtt client 支持两种共享订阅方式:
- 共享订阅:订阅前缀
$queue/
,多个客户端订阅了$queue/topic
,发布者发布到topic,则只有一个客户端会接收到消息。 - 分组订阅:订阅前缀
$share/<group>/
,组客户端订阅了$share/group1/topic
、$share/group2/topic
..,发布者发布到topic,则消息会发布到每个group中,但是每个group中只有一个客户端会接收到消息。
8、MqttClientTemplate 使用示例
@Component
public class ClientService {
private static final Logger logger = LoggerFactory.getLogger(ClientService.class);
@Inject
private MqttClientTemplate client;
public boolean publish(String body) {
client.publish("/test/client", body.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;
}
}