Maintenant, je suis en train de se connecter à partir des messages MQTT à kafka (étincelle en train de diffuser dans kafka)Comment Conver les données de charge utile de MQTT type de chaîne de kafka
J'ai utilisé ce connecteur https://github.com/evokly/kafka-connect-mqtt
Et Spark-2.1. 0, Kafka - 0.10.1.1
Saprk sortie de streaming tels que cette
({"schema":{"type":"string","optional":false},"payload":"mqtt"},{"schema":{"type":"bytes","optional":false},"payload":"MTIzMTIz"})
et code du producteur
object mqttProducer {
def main(args: Array[String]) {
val brokerUrl = "tcp://ip"
val topic = "mqtt"
val msg = "123123"
var client: MqttClient = null
// Creating new persistence for mqtt client
val persistence = new MqttDefaultFilePersistence("/tmp")
try {
// mqtt client with specific url and client id
client = new MqttClient(brokerUrl, MqttClient.generateClientId, persistence)
client.connect()
val msgTopic = client.getTopic(topic)
val message = new MqttMessage(msg.getBytes("utf-8"))
while (true) {
msgTopic.publish(message)
println("Publishing Data, Topic : %s, Message : %s".format(msgTopic.getName, message))
Thread.sleep(1000)
}
}
catch {
case e: MqttException => println("Exception Caught: " + e)
}
finally {
client.disconnect()
}
et étincelles en streaming code de la consommation de kafka
package hb.test1
import org.apache.kafka.common.serialization.StringDeserializer
import org.apache.spark.SparkConf
import org.apache.spark.streaming.Seconds
import org.apache.spark.streaming.StreamingContext
import org.apache.spark.streaming.kafka010.ConsumerStrategies.Subscribe
import org.apache.spark.streaming.kafka010.KafkaUtils
import org.apache.spark.streaming.kafka010.LocationStrategies.PreferConsistent
object test2 {
def main(args: Array[String]): Unit = {
val sparkConf = new SparkConf().setAppName("app")
val ssc = new StreamingContext(sparkConf, Seconds(1))
val kafkaParams = Map[String, Object](
"bootstrap.servers" ->
"servers ip",
"key.deserializer" -> classOf[StringDeserializer],
"value.deserializer" -> classOf[StringDeserializer],
"group.id" -> "use_a_separate_group_id_for_each_stream",
"auto.offset.reset" -> "latest",
"enable.auto.commit" -> (false: java.lang.Boolean)
)
val topics = Array("mqtt-kafka")
val stream = KafkaUtils.createDirectStream[String, String](
ssc,
PreferConsistent,
Subscribe[String, String](topics, kafkaParams)
)
val testStream = stream.map(x => (x.key, x.value))
testStream.print()
ssc.start()
ssc.awaitTermination()
}
}
Comment pourrais-je obtenir cordes de Byte? s'il vous plaît aider les gars