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Rate2ConsoleContinuousTrigger.scala
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Rate2ConsoleContinuousTrigger.scala
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package streaming.trigger
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.streaming.Trigger
object Rate2ConsoleContinuousTrigger extends App {
val spark: SparkSession = SparkSession.builder()
.appName("Rate2ConsoleContinuousTrigger")
.master("local[*]")
.getOrCreate()
spark.sparkContext.setLogLevel("ERROR")
val df = spark.readStream
.format("rate")
.option("rowsPerSecond", 1)
.option("numPartitions", 1)
.option("rampUpTime", 1)
.load()
val rateRawData = df.selectExpr("CAST(timestamp AS STRING)", "CAST(value AS string)")
val firstContinuousStream = rateRawData.writeStream
.format("console")
.queryName("First Continuous Stream ")
.trigger(Trigger.Continuous("1 seconds"))
.option("checkpointLocation", "sparkCheckPoint\\Rate2ConsoleContinuousTrigger\\cp1")
.start()
val secondContinuousStream = rateRawData.writeStream
.format("console")
.queryName("Second Continuous Stream ")
.trigger(Trigger.Continuous("1 seconds"))
.option("checkpointLocation", "sparkCheckPoint\\Rate2ConsoleContinuousTrigger\\cp2")
.start()
spark.streams.awaitAnyTermination()
}