无法分析数据

Question

val patterns=ctx.getBroadcastState(patternStateDescriptor(

我做的进口

import org.apache.flink.api.common.serialization.SimpleStringSchema
import org.apache.flink.api.common.state.{MapStateDescriptor, ValueState, ValueStateDescriptor}
import org.apache.flink.api.scala.typeutils.Types
import org.apache.flink.configuration.Configuration
import org.apache.flink.streaming.api.datastream.BroadcastStream
import org.apache.flink.streaming.api.functions.co.KeyedBroadcastProcessFunction
import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer010
import org.apache.flink.streaming.api.scala._
import org.apache.flink.util.Collector

这是代码

val env = StreamExecutionEnvironment.getExecutionEnvironment
val properties = new Properties()
properties.setProperty("bootstrap.servers","localhost:9092")
val patternStream = new FlinkKafkaConsumer010("patterns", new SimpleStringSchema, properties)
val patterns = env.addSource(patternStream)
var patternData = patterns.map {
str =>
val splitted_str = str.split(",")
PatternStream(splitted_str(0).trim, splitted_str(1).trim, splitted_str(2).trim)
}
val logsStream = new FlinkKafkaConsumer010("logs", new SimpleStringSchema, properties)
//  logsStream.setStartFromEarliest()
val logs = env.addSource(logsStream)
var data = logs.map {
str =>
val splitted_str = str.split(",")
LogsTest(splitted_str.head.trim, splitted_str(1).trim, splitted_str(2).trim)
}
val keyedData: KeyedStream[LogsTest, String] = data.keyBy(_.metric)
val bcStateDescriptor = new MapStateDescriptor[Unit, PatternStream]("patterns", Types.UNIT, Types.of[PatternStream]) // first type defined is for the key and second data type defined is for the value
val broadcastPatterns: BroadcastStream[PatternStream]  = patternData.broadcast(bcStateDescriptor)
val alerts = keyedData
.connect(broadcastPatterns)
.process(new PatternEvaluator())
alerts.print()
//   println(alerts.getClass)
//  val sinkProducer = new FlinkKafkaProducer010("output",  new SimpleStringSchema(), properties)

env.execute("Flink Broadcast State Job")
}
class PatternEvaluator()
extends KeyedBroadcastProcessFunction[String, LogsTest, PatternStream, (String, String, String)] {
private lazy val patternStateDescriptor = new MapStateDescriptor("patterns", classOf[String], classOf[String])
private var lastMetricState: ValueState[String] = _
override def open(parameters: Configuration): Unit = {
val lastMetricDescriptor = new ValueStateDescriptor("last-metric", classOf[String])
lastMetricState = getRuntimeContext.getState(lastMetricDescriptor)
}
override def processElement(reading: LogsTest,
readOnlyCtx: KeyedBroadcastProcessFunction[String, LogsTest, PatternStream, (String, String, String)]#ReadOnlyContext,
out: Collector[(String, String, String)]): Unit = {
val metrics = readOnlyCtx.getBroadcastState(patternStateDescriptor)
if (metrics.contains(reading.metric)) {
val metricPattern: String = metrics.get(reading.metric)
val metricPatternValue: String = metrics.get(reading.value)
val lastMetric = lastMetricState.value()
val logsMetric = (reading.metric)
val logsValue = (reading.value)

if (logsMetric == metricPattern) {
if (metricPatternValue == logsValue) {
out.collect((reading.timestamp, reading.value, reading.metric))
}
}
}
}

override def processBroadcastElement(
update: PatternStream,
ctx: KeyedBroadcastProcessFunction[String, LogsTest, PatternStream, (String, String, String)]#Context,
out: Collector[(String, String, String)]
): Unit = {
val patterns = ctx.getBroadcastState(patternStateDescriptor)
if (update.metric == "IP") {
patterns.put(update.metric /*,update.operator*/ , update.value)
}
//    else if (update.metric == "username"){
//      patterns.put(update.metric, update.value)
//    }
//    else {
//      println("No required data found")
//    }
//  }
}
}

示例数据：-日志流

"21/09/98","IP", "5.5.5.5"

模式流

"IP","==","5.5.5.5"

我无法通过获得所需结果来分析数据，即=98年9月21日，IP，5.5.5.5

到目前为止没有错误，只是没有分析数据

代码正在读取流(已选中(

Answer 1

在这种情况下，一个常见的问题来源是API无法控制模式和数据的摄入顺序。可能是在processBroadcastElement之前调用了processElement。