当使用WS02 siddhi MQTT扩展时，sourceMapper：xml不存在扩展

Question

我想在siddhi中创建一个MQTT源代码，我的代码是

public class MqttReceiver {
    private static final Logger log = Logger.getLogger(MqttReceiver.class);

    /**
     * Main method to start the test client.
     *
     * @param args no args need to be provided
     */
    public static void main(String[] args) {

        log.info("Initialize mqtt receiver.");

        SiddhiManager siddhiManager = new SiddhiManager();

//        String url = "tcp://localhost:5020";
//        String topic = "mqtt_topic";
//        String type = "xml";


        SiddhiAppRuntime siddhiAppRuntime = siddhiManager.createSiddhiAppRuntime(
                "@App:name(\"PublishMqttInXmlFormatTest\")\n" +
                        "@source(type='mqtt', url= 'tcp://localhost:1883', topic='mqtt_topic', clean.session='true',quality.of.service= '1', keep.alive= '60',connection.timeout='30' , @map(type='xml'))" +
                        "define stream LowProducitonAlertStream (name string, amount double);\n" +
                        "@sink(type='log')\n" +
                        "define stream logStream(name string, amount double);\n" +
                        "from LowProducitonAlertStream\n" +
                        "select * \n" +
                        "insert into logStream;");



        siddhiAppRuntime.start();

        while (true) {
        }
    }
}

但我收到以下异常

No extension exist for sourceMapper:xml

从下图中可以看出，XML作为库文件中的示例

我做错了什么？

编辑1

似乎库文件中未提及name parameter的{​​{1}}，但示例中提到了api

type

如何在siddhi中使用MQTT？

Answer 1

在我的头撞到屏幕一小时之后，我认为这是我的全部错误，实际上，@map json是另一个需要导入maven POM的扩展。因此，如果您遇到此问题，请将this dependency放入POM