大家好，我是考100分的小小码 ，祝大家学习进步，加薪顺利呀。今天说一说SparkStreaming两种方式连接Flume,希望您对编程的造诣更进一步.
SparkStreaming 连接Flume的两种方式分别为：Push(推)和Pull(拉)的方式实现，以Spark Streaming的角度来看，Push方式属于推送(由Flume向Spark推送数据)；而Pull属于拉取(Spark 拉取 Flume的输出数据)；
Flume向SparkStreaming推送数据没有研究明白，有大佬指点一下吗？
万分感谢！
1.Spark拉取Flume数据：
导入两个jar包到flume/lib下
否则抛出这两个异常：
org.apache.flume.FlumeException: Unable to load sink type: org.apache.spark.streaming.flume.sink.SparkSink, class: org.apache.spark.streaming.flume.sink.SparkSink
java.lang.IllegalStateException: begin() called when transaction is OPEN!
2.编写flume 工作文件：
a1.sources = r1 a1.sinks = k1 a1.channels = c1 # source a1.sources.r1.type=spooldir a1.sources.r1.spoolDir=/home/zhuzhu/apps/flumeSpooding a1.sources.r1.fileHeader=true # Describe the sink a1.sinks.k1.type = org.apache.spark.streaming.flume.sink.SparkSink # 当前主机端口 a1.sinks.k1.hostname = 192.168.137.88 a1.sinks.k1.port = 9999 # Use a channel which buffers events in memory a1.channels.c1.type = memory a1.channels.c1.capacity = 1000 a1.channels.c1.transactionCapacity = 100 # Bind the source and sink to the channel a1.sources.r1.channels = c1 a1.sinks.k1.channel = c1
3.编写SparkStreaming程序：
package day02
import java.net.InetSocketAddress
import org.apache.spark.storage.StorageLevel
import org.apache.spark.streaming.{Seconds, StreamingContext}
import org.apache.spark.streaming.dstream.{DStream, ReceiverInputDStream}
import org.apache.spark.streaming.flume.{FlumeUtils, SparkFlumeEvent}
import org.apache.spark.{SparkConf, SparkContext}
/**
* @ClassName: StreamingFlume
* @Description TODO 实时监控flume，统计flume数据产生,是Spark
* @Author: Charon
* @Date: 2021/4/7 13:19
* @Version 1.0
**/
object StreamingFlume {
def main(args: Array[String]): Unit = {
//1.创建SparkConf对象
val conf: SparkConf = new SparkConf().setMaster("local[*]").setAppName("StreamingFlume")
//2.创建SparkContext对象
val sc = new SparkContext(conf)
//设置日志输出格式，只打印异常日志，在这里设置没有用
//sc.setLogLevel("WARN")
//3.创建StreamingContext,Seconds(5)：轮询机制，多久执行一次
val ssc = new StreamingContext(sc, Seconds(5))
//4.定义一个flume集合，可以接受多个flume数据,多个用，隔开需要new
val addresses = Seq(new InetSocketAddress("127.0.0.1", 5555))
//5.获取flume中的数据，
val stream: ReceiverInputDStream[SparkFlumeEvent] = FlumeUtils.createPollingStream(ssc, addresses, StorageLevel.MEMORY_AND_DISK_2)
// 6.截取flume数据：{"header":xxxxx "body":xxxxxx}
val lineDstream: DStream[String] = stream.map(x => new String(x.event.getBody.array()))
lineDstream.flatMap(x=>x.split(" ")).map(x=>(x,1)).reduceByKey(_+_).print()
ssc.start()
ssc.awaitTermination()
}
}
4。开启flume监控文件，开启SparkStreaming程序：
向指定目录上传文件
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