文章目錄
-
-
- 函數類
- 富函數
-
flink暴露所有udf函數的接口(實作方式為接口或者抽象類),例如MapFunction,FilterFunction,ProcessFunction等等
class FilterFilter extends FilterFunction[String] {
override def filter(value : String) :Boolean = {
value.contains("flink")
}
}
val flinkTweets = tweets.filter(new FlinkFilter)
還可以将函數實作成匿名類
val flinkTweets = tweets.filter(
new RichFilterFunction[String](
override def filter(value: String):Boolean = {
value.contains("flink")
}
)
)