Github user huafengw commented on a diff in the pull request: https://github.com/apache/incubator-gearpump/pull/78#discussion_r77101042 --- Diff: examples/streaming/wordcount/src/main/scala/org/apache/gearpump/streaming/examples/wordcount/Split.scala --- @@ -23,29 +23,34 @@ import java.util.concurrent.TimeUnit import org.apache.gearpump.Message import org.apache.gearpump.cluster.UserConfig -import org.apache.gearpump.streaming.source.Watermark +import org.apache.gearpump.streaming.source.{DataSource, DataSourceTask, Watermark} import org.apache.gearpump.streaming.task.{Task, TaskContext} -class Split(taskContext: TaskContext, conf: UserConfig) extends Task(taskContext, conf) { - import taskContext.output - override def onStart(startTime: Instant): Unit = { - self ! Watermark(Instant.now) - } +class Split() extends DataSource { + + + override def open(context: TaskContext, startTime: Instant): Unit = {} - override def onNext(msg: Message): Unit = { + + override def read(): Message = { Split.TEXT_TO_SPLIT.lines.foreach { line => line.split("[\\s]+").filter(_.nonEmpty).foreach { msg => - output(new Message(msg, System.currentTimeMillis())) + new Message(msg, System.currentTimeMillis()) } } - - import scala.concurrent.duration._ - taskContext.scheduleOnce(Duration(100, TimeUnit.MILLISECONDS))(self ! - Watermark(Instant.now)) + Message("message") } + + override def close(): Unit = {} + + override def getWatermark: Instant = Instant.now() + + Watermark(Instant.now) --- End diff -- What's this line of code used for?
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