向Kafka中发送数据

---

import java.util.HashMap

import org.apache.kafka.clients.producer.{KafkaProducer, ProducerConfig, ProducerRecord}

object KafkaWordProducer {
  def main(args: Array[String]): Unit = {

// 打包部署，需要使用如下代码
/*
    if(args.length < 4){
      System.err.println("Usage: KafkaWordProducer <metadataBrokerList> <topic> <messagesPerSec> <wordsPerMessage>")
      System.exit(1)
    }
    val Array(brokers, topic, messagesPerSec, wordsPerMessage) = args
*/

//直接测试，使用如下代码
    val Array(brokers, topic, messagesPerSec, wordsPerMessage) = Array("localhost:9092","test_topic","3","5")

    //zookeeper连接设置
    //必须是Object，否则     val producer = new KafkaProducer[String,String](props) 报错
    val props = new HashMap[String, Object]()
    props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, brokers)
    props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer")
    props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer")
    val producer = new KafkaProducer[String,String](props)

//发送数据
    while(true){
      (1 to messagesPerSec.toInt).foreach{
        messageNum =>
          val str = (1 to wordsPerMessage.toInt).map(x=>scala.util.Random.nextInt(10)).mkString(" ")
          println(str)

          val message = new ProducerRecord[String,String](topic,null, str)
          producer.send(message)
      }
      Thread.sleep(1000)
    }
  }
}

　　

涉及到的POM.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.test</groupId>
    <artifactId>sparkTest</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <spark.version>2.1.0</spark.version>
        <scala.version>2.11</scala.version>
    </properties>


    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-sql_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-hive_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-mllib_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.spark/spark-streaming-kafka-0-8 -->
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming-kafka-0-8_2.11</artifactId>
            <version>2.1.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.kafka/kafka-clients -->
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
            <version>2.2.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>

            <plugin>
                <groupId>org.scala-tools</groupId>
                <artifactId>maven-scala-plugin</artifactId>
                <version>2.15.2</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.19</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>

        </plugins>
    </build>
</project>

　　

 

---