MqttMessageSender.java
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package com.diligrp.mqtt.integration.handler;
import com.diligrp.mqtt.core.event.SendFailEvent;
import com.diligrp.mqtt.core.event.SendSuccessEvent;
import com.diligrp.mqtt.core.model.SendModel;
import com.diligrp.mqtt.core.service.MqttMessageService;
import com.diligrp.mqtt.core.util.JsonUtils;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHeaders;
import org.springframework.stereotype.Service;
import org.springframework.util.MimeTypeUtils;
import java.util.Optional;
/**
* MQTT消息发送服务
*/
@Slf4j
@Service
public class MqttMessageSender implements MqttMessageService {
public static final String MQTT_TOPIC = "mqtt_topic";
public static final String MQTT_QOS = "mqtt_qos";
public static final String MQTT_RETAINED = "mqtt_retained";
@Resource
private MessageChannel mqttOutboundChannel;
@Resource
private ApplicationEventPublisher applicationEventPublisher;
@Override
public void sendMessage(SendModel sendModel) {
try {
String payload = JsonUtils.toJsonString(sendModel.getPayload());
var message = MessageBuilder.withPayload(payload)
.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
.setHeader(MQTT_TOPIC, sendModel.getTopic())
.setHeader(MQTT_QOS, sendModel.getQos())
.setHeader(MQTT_RETAINED, sendModel.getRetained())
.build();
boolean result = mqttOutboundChannel.send(message);
Optional.of(result).filter(e -> e).ifPresentOrElse(send -> {
log.info("消息发送成功 - :{}", message);
applicationEventPublisher.publishEvent(new SendSuccessEvent(this, sendModel));
}, () -> {
log.error("消息发送失败 - :{}", message);
applicationEventPublisher.publishEvent(new SendFailEvent(this, sendModel));
});
} catch (Exception e) {
log.error("发送Mqtt消息失败", e);
applicationEventPublisher.publishEvent(new SendFailEvent(this, sendModel));
}
}
}