Java-Mqtt-ActiveMq(2)

Java-Mqtt-ActiveMq(2)

不使用回调函数获取订阅信息

1、maven

<!-- https://mvnrepository.com/artifact/org.fusesource.hawtbuf/hawtbuf -->
        <dependency>
            <groupId>org.fusesource.hawtbuf</groupId>
            <artifactId>hawtbuf</artifactId>
            <version>1.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.fusesource.hawtdispatch/hawtdispatch -->
        <dependency>
            <groupId>org.fusesource.hawtdispatch</groupId>
            <artifactId>hawtdispatch</artifactId>
            <version>1.22</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.fusesource.hawtdispatch/hawtdispatch-transport -->
        <dependency>
            <groupId>org.fusesource.hawtdispatch</groupId>
            <artifactId>hawtdispatch-transport</artifactId>
            <version>1.22</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.fusesource.mqtt-client/mqtt-client -->
        <dependency>
            <groupId>org.fusesource.mqtt-client</groupId>
            <artifactId>mqtt-client</artifactId>
            <version>1.15</version>
        </dependency>

2、code

/**
 * Mqtt服务消费者（订阅）
 *
 * @author: zy
 * @date: 2020-09-23 10:17
 */
@Component
@Slf4j
public class MqttConsumer {

    /**
     * ActiveMq服务地址
     */
    private static String MqUrl;

    @Value("${config.MQ-URL}")
    public void setMqUrl(String mqUrl) {
        MqUrl = mqUrl;
    }

    /**
     * ActiveMq客户端id
     */
    private static String MqClinetId;

    @Value("${config.MQ-SUB-CLIENTID}")
    public void setMqClinetId(String mqClinetId) {
        MqClinetId = mqClinetId;
    }

    /**
     * ActiveMq用户名
     */
    private static String MqUserName;

    @Value("${config.MQ-USERNAME}")
    public void setMqUserName(String mqUserName) {
        MqUserName = mqUserName;
    }

    /**
     * ActiveMq用户密码
     */
    private static String MqPassword;

    @Value("${config.MQ-PASSWORD}")
    public void setMqPassword(String mqPassword) {
        MqPassword = mqPassword;
    }

    /**
     * 连接前是否清空回话信息
     */
    private final static boolean CLEAN_START = true;
    /**
     * 低耗网络，但是又需要及时获取数据，心跳30s
     */
    private final static short KEEP_ALIVE = 30;
    /**
     * 设置重新连接次数
     */
    public final static long RECONNECTION_ATTEMPT_MAX = 6;
    /**
     * 设置重连时间间隔
     */
    public final static long RECONNECTION_DELAY = 2000;
    /**
     * 发送最大缓冲为2M
     */
    public final static int SEND_BUFFER_SIZE = 2 * 1024 * 1024;


    /**
     * Mqtt-订阅
     *
     * @param topicList 主题Topic列表
     */
    public static void doSub(List<String> topicList) {

        Topic[] topics;
        String jsonStr;
        List<Topic> topicArrayList = new ArrayList<>();
        for (String topic : topicList) {
            topicArrayList.add(new Topic(topic, QoS.AT_LEAST_ONCE));
        }
        topics = topicArrayList.toArray(new Topic[topicArrayList.size()]);
        MQTT mqtt = new MQTT();

        //1、创建MQTT对象
        try {
            // 设置mqtt broker的ip和端口
            mqtt.setHost(MqUrl);
            // 连接前清空会话信息
            mqtt.setCleanSession(CLEAN_START);
            // 设置重新连接的次数
            mqtt.setReconnectAttemptsMax(RECONNECTION_ATTEMPT_MAX);
            // 设置重连的间隔时间
            mqtt.setReconnectDelay(RECONNECTION_DELAY);
            // 设置心跳时间
            mqtt.setKeepAlive(KEEP_ALIVE);
            // 设置缓冲的大小
            mqtt.setSendBufferSize(SEND_BUFFER_SIZE);
            //设置客户端id
            mqtt.setClientId(MqClinetId);
            mqtt.setUserName(MqUserName);
            mqtt.setPassword(MqPassword);
            final FutureConnection connection = mqtt.futureConnection();
            connection.connect();
            connection.subscribe(topics);
            while (true) {
                Future<Message> futrueMessage = connection.receive();
                Message message = futrueMessage.await();
                log.info("----------" + "message-topic:" + message.getTopic() + "----------");
                log.info("----------" + "message-payloadBuffer:" + message.getPayloadBuffer() + "----------");
                String msg = String.valueOf(message.getPayloadBuffer());

                if (msg.substring(0, 3).equals("hex")) {
                    msg = msg.substring(5);
                    byte[] bytes = Hex.decodeHex(msg.toCharArray());
                    jsonStr = new String(bytes, "GBK");
                    log.info("----------" + "message-jsonStr:" + jsonStr + "----------");
                } else {
                    jsonStr = msg.substring(7);
                    log.info("----------" + "message-jsonStr:" + jsonStr + "----------");
                }
                // TODO 根据topic不同调用不同的服务、接口


            }
        } catch (URISyntaxException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
        }
    }


}