步骤概述
1 启动zookeeper
2 启动Kafa
3 创建kafka topic
4 通过控制台测试本kafka topic是否能够正常的生产和消费信息
5 写Spark Streaming代码
6 启动Spark Streaming程序(传入参数zookeeper,group,topic,线程数)(传入参数 hadoop000:2181 test kafka_streaming_topic 1)
7 通过kafka-console-producer生产数据
8 查看idea控制台输出信息是否正确
/*Receiver没有Direct好,生产上一般使用Direct,Direct在Spark1.3之后才有*/
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1 启动zookeeper命令
./zkServer.sh start
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2 启动Kafa
$KAFKA_HOME/bin/kafka-server-start.sh -daemon $KAFKA_HOME/config/server.properties
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3 创建kafka topic
$KAFKA_HOME/bin/kafka-topic.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic kafka_streaming_topic
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4 通过控制台测试本kafka topic是否能够正常的生产和消费信息
// kafka消费端启动命令
$KAFKA_HOME/bin/kafka-console-consumer.sh --zookeeper localhost:2181 --topic kafka_streaming_topic
// kafka生产端启动命令
$KAFKA_HOME/bin/kafka-console-producer.sh --broker-list localhost:9092 --topic kafka_streaming_topic
// 向生产端发送字符,如果消费端能够收到就证明通了
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5 写Spark Streaming代码
// 向maven添加依赖
groupId = org.apache.spark
artifactId = spark-streaming-kafka-0-8_2.11
version = 2.2.0
package com.imooc.spark
import org.apache.spark.SparkConf
import org.apache.spark.streaming.kafka.KafkaUtils
import org.apache.spark.streaming.{Seconds, StreamingContext}
/*Spark Streaming 整合 Kafka Receiver 方法*/
object KafkaReceiverWordCount {
def main(args: Array[String]): Unit = {
if(args.length != 4) {
System.err.println("Usage: KafkaReceiverWordCount <zkQuorum> <group> <topics> <numThreads>")
}
val Array(zkQuorum, group, topics, numThreads) = args
val sparkConf = new SparkConf().setAppName("KafkaReceiverWordCount").setMaster("local[2]")
val ssc = new StreamingContext(sparkConf, Seconds(5))
val topicMap = topics.split(",").map((_, numThreads.toInt)).toMap
// Spark Streaming对接Kafka需要ssc,zookeeper,组,topic
val messages = KafkaUtils.createStream(ssc, zkQuorum, group, topicMap)
// 自己趣测试为什么要取第二个
messages.map(_._2).flatMap(_.split(" ")).map((_,1)).reduceByKey(_+_).print()
ssc.start()
ssc.awaitTermination()
}
}
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6 启动Spark Streaming程序(传入参数zookeeper,group,topic,线程数)(传入参数 hadoop000:2181 test kafka_streaming_topic 1)
在idea右键启动一次后添加启动参数
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7 通过kafka-console-producer生产数据
$KAFKA_HOME/bin/kafka-console-producer.sh --broker-list localhost:9092 --topic kafka_streaming_topic
// 运行上面命令以后就打几个字符
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8 查看idea控制台输出信息是否正确
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