This class provides an easy way to use Server Sent Events (SSE) as a chunked encoding, using an Akka Source.
Please see the Server-Sent Events specification for details.
An example of how to display an event stream:
import java.time.ZonedDateTime
import java.time.format.DateTimeFormatter
import javax.inject.Singleton
import akka.stream.scaladsl.Source
import play.api.http.ContentTypes
import play.api.libs.EventSource
import play.api.mvc._
import scala.concurrent.duration._
def liveClock() = Action {
val df: DateTimeFormatter = DateTimeFormatter.ofPattern("HH mm ss")
val tickSource = Source.tick(0 millis, 100 millis, "TICK")
val source = tickSource.map { (tick) =>
df.format(ZonedDateTime.now())
}
Ok.chunked(source via EventSource.flow).as(ContentTypes.EVENT_STREAM)
}
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