Flink在流处理上常见的Source和sink操作
flink在流处理上的source和在批处理上的source基本一致。大致有4大类
1.基于本地集合的source（Collection-based-source）
2.基于文件的source（File-based-source）
3.基于网络套接字的source（Socket-based-source）
4.自定义的source（Custom-source）
基于集合的source
import org.apache.flink.streaming.api.scala.{StreamExecutionEnvironment, _} import scala.collection.immutable.{Queue, Stack} import scala.collection.mutable import scala.collection.mutable.{ArrayBuffer, ListBuffer} object DataSource001 { def main(args: Array[String]): Unit = { val senv = StreamExecutionEnvironment.getExecutionEnvironment //0.用element创建DataStream(fromElements) val ds0: DataStream[String] = senv.fromElements("spark", "flink") ds0.print() //1.用Tuple创建DataStream(fromElements) val ds1: DataStream[(Int, String)] = senv.fromElements((1, "spark"), (2, "flink")) ds1.print() //2.用Array创建DataStream val ds2: DataStream[String] = senv.fromCollection(Array("spark", "flink")) ds2.print() //3.用ArrayBuffer创建DataStream val ds3: DataStream[String] = senv.fromCollection(ArrayBuffer("spark", "flink")) ds3.print() //4.用List创建DataStream val ds4: DataStream[String] = senv.fromCollection(List("spark", "flink")) ds4.print() //5.用List创建DataStream val ds5: DataStream[String] = senv.fromCollection(ListBuffer("spark", "flink")) ds5.print() //6.用Vector创建DataStream val ds6: DataStream[String] = senv.fromCollection(Vector("spark", "flink")) ds6.print() //7.用Queue创建DataStream val ds7: DataStream[String] = senv.fromCollection(Queue("spark", "flink")) ds7.print() //8.用Stack创建DataStream val ds8: DataStream[String] = senv.fromCollection(Stack("spark", "flink")) ds8.print() //9.用Stream创建DataStream（Stream相当于lazy List，避免在中间过程中生成不必要的集合） val ds9: DataStream[String] = senv.fromCollection(Stream("spark", "flink")) ds9.print() //10.用Seq创建DataStream val ds10: DataStream[String] = senv.fromCollection(Seq("spark", "flink")) ds10.print() //11.用Set创建DataStream(不支持) //val ds11: DataStream[String] = senv.fromCollection(Set("spark", "flink")) //ds11.print() //12.用Iterable创建DataStream(不支持) //val ds12: DataStream[String] = senv.fromCollection(Iterable("spark", "flink")) //ds12.print() //13.用ArraySeq创建DataStream val ds13: DataStream[String] = senv.fromCollection(mutable.ArraySeq("spark", "flink")) ds13.print() //14.用ArrayStack创建DataStream val ds14: DataStream[String] = senv.fromCollection(mutable.ArrayStack("spark", "flink")) ds14.print() //15.用Map创建DataStream(不支持) //val ds15: DataStream[(Int, String)] = senv.fromCollection(Map(1 -> "spark", 2 -> "flink")) //ds15.print() //16.用Range创建DataStream val ds16: DataStream[Int] = senv.fromCollection(Range(1, 9)) ds16.print() //17.用fromElements创建DataStream val ds17: DataStream[Long] = senv.generateSequence(1, 9) ds17.print() senv.execute(this.getClass.getName) } }
//TODO 2.基于文件的source（File-based-source） //0.创建运行环境 val env = StreamExecutionEnvironment.getExecutionEnvironment //TODO 1.读取本地文件 val text1 = env.readTextFile("data2.csv") text1.print() //TODO 2.读取hdfs文件 val text2 = env.readTextFile("hdfs://hadoop01:9000/input/flink/README.txt") text2.print() env.execute()
val source = env.socketTextStream("IP", PORT)
Kafka基本命令：
● 查看当前服务器中的所有topic bin/kafka-topics.sh --list --zookeeper hadoop01:2181 ● 创建topic bin/kafka-topics.sh --create --zookeeper hadoop01:2181 --replication-factor 1 --partitions 1 --topic test ● 删除topic sh bin/kafka-topics.sh --delete --zookeeper zk01:2181 --topic test 需要server.properties中设置delete.topic.enable=true否则只是标记删除或者直接重启。 ● 通过shell命令发送消息 sh bin/kafka-console-producer.sh --broker-list hadoop01:9092 --topic test ● 通过shell消费消息 bin/kafka-console-consumer.sh --zookeeper hadoop01:2181 --from-beginning --topic test1 ● 查看消费位置 bin/kafka-run-cla.ss.sh kafka.tools.ConsumerOffsetChecker --zookeeper zk01:2181 --group testGroup ● 查看某个Topic的详情 bin/kafka-topics.sh --topic test --describe --zookeeper zk01:2181 ● 对分区数进行修改 kafka-topics.sh --zookeeper zk01 --alter --partitions 15 --topic utopic
使用flink消费kafka的消息（不规范，其实需要自己手动维护offset）：
import java.util.Properties import org.apache.flink.streaming.api.scala.{DataStream, StreamExecutionEnvironment} import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09 import org.apache.flink.streaming.util.serialization.SimpleStringSchema import org.apache.flink.api.scala._ /** * Created by angel； */ object DataSource_kafka { def main(args: Array[String]): Unit = { //1指定kafka数据流的相关信息 val zkCluster = "hadoop01,hadoop02,hadoop03:2181" val kafkaCluster = "hadoop01:9092,hadoop02:9092,hadoop03:9092" val kafkaTopicName = "test" //2.创建流处理环境 val env = StreamExecutionEnvironment.getExecutionEnvironment //3.创建kafka数据流 val properties = new Properties() properties.setProperty("bootstrap.servers", kafkaCluster) properties.setProperty("zookeeper.connect", zkCluster) properties.setProperty("group.id", kafkaTopicName) val kafka09 = new FlinkKafkaConsumer09[String](kafkaTopicName, new SimpleStringSchema(), properties) //4.添加数据源addSource(kafka09) val text = env.addSource(kafka09).setParallelism(4) /** * test#CS#request http://b2c.csair.com/B2C40/query/jaxb/direct/query.ao?t=S&c1=HLN&c2=CTU&d1=2018-07-12&at=2&ct=2&inf=1#CS#POST#CS#application/x-www-form-urlencoded#CS#t=S&json={'adultnum':'1','arrcity':'NAY','childnum':'0','depcity':'KHH','flightdate':'2018-07-12','infantnum':'2'}#CS#http://b2c.csair.com/B2C40/modules/bookingnew/main/flightSelectDirect.html?t=R&c1=LZJ&c2=MZG&d1=2018-07-12&at=1&ct=2&inf=2#CS#123.235.193.25#CS#Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1#CS#2018-01-19T10:45:13:578+08:00#CS#106.86.65.18#CS#cookie * */ val values: DataStream[ProcessedData] = text.map{ line => var encrypted = line val values = encrypted.split("#CS#") val valuesLength = values.length var regionalRequest = if(valuesLength > 1) values(1) else "" val requestMethod = if (valuesLength > 2) values(2) else "" val contentType = if (valuesLength > 3) values(3) else "" //Post提交的数据体 val requestBody = if (valuesLength > 4) values(4) else "" //http_referrer val httpReferrer = if (valuesLength > 5) values(5) else "" //客户端IP val remoteAddr = if (valuesLength > 6) values(6) else "" //客户端UA val httpUserAgent = if (valuesLength > 7) values(7) else "" //服务器时间的ISO8610格式 val timeIso8601 = if (valuesLength > 8) values(8) else "" //服务器地址 val serverAddr = if (valuesLength > 9) values(9) else "" //获取原始信息中的cookie字符串 val cookiesStr = if (valuesLength > 10) values(10) else "" ProcessedData(regionalRequest, requestMethod, contentType, requestBody, httpReferrer, remoteAddr, httpUserAgent, timeIso8601, serverAddr, cookiesStr) } values.print() val remoteAddr: DataStream[String] = values.map(line => line.remoteAddr) remoteAddr.print() //5.触发运算 env.execute("flink-kafka-wordcunt") } } //保存结构化数据 case class ProcessedData(regionalRequest: String, requestMethod: String, contentType: String, requestBody: String, httpReferrer: String, remoteAddr: String, httpUserAgent: String, timeIso8601: String, serverAddr: String, cookiesStr: String )
