omp-java/src/main/java/com/zy/omp/config/mqtt/MqttProducerCfg.java

package com.zy.omp.config.mqtt;

import com.zy.omp.utils.CodeGenerator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.mqtt.core.MqttPahoClientFactory;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandler;

/**
 * MQTT 生产者配置
 *
 * @author yang xiao kun
 * create on 2021/1/19
 */
@Configuration
public class MqttProducerCfg {

    @Autowired
    private MqttPahoClientFactory mqttClientFactory;

    /**
     * MQTT信息通道（生产者）
     */
    @Bean(name = "mqttOutboundChannel")
    public MessageChannel mqttOutboundChannel() {
        return new DirectChannel();
    }

    /**
     * MQTT消息处理器（生产者）
     */
    @Bean
    @ServiceActivator(inputChannel = "mqttOutboundChannel")
    public MessageHandler mqttOutbound() {
        MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(CodeGenerator.shortUuid() + "_Producer", mqttClientFactory);
        // 设置异步发送，默认是false(发送时阻塞)
        messageHandler.setAsync(true);
        // 设置默认的服务质量
        messageHandler.setDefaultQos(0);
        messageHandler.setDefaultRetained(false);
        return messageHandler;
    }
}