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{% highlight scala %}
import akka.actor.{Actor, ActorLogging, ActorRef, Props, Terminated}
import akka.io.IO
import akka.serial.{Serial, SerialSettings}
import akka.util.ByteString
/**
* Sample actor representing a simple terminal.
*/
class Terminal(port: String, settings: SerialSettings) extends Actor with ActorLogging {
import context._
override def preStart() = {
log.info(s"Requesting manager to open port: ${port}, baud: ${settings.baud}")
IO(Serial) ! Serial.Open(port, settings)
}
def receive: Receive = {
case Serial.CommandFailed(cmd, reason) =>
log.error(s"Connection failed, stopping terminal. Reason: ${reason}")
context stop self
case Serial.Opened(port) =>
log.info(s"Port ${port} is now open.")
context become opened(sender)
context watch sender // get notified in the event the operator crashes
}
def opened(operator: ActorRef): Receive = {
case Serial.Received(data) =>
log.info(s"Received data: " + data)
case Serial.Closed =>
log.info("Operator closed normally, exiting terminal.")
context stop self
case Terminated(`operator`) =>
log.error("Operator crashed unexpectedly, exiting terminal.")
context stop self
case ":q" =>
operator ! Serial.Close
case str: String =>
operator ! Serial.Write(ByteString(str))
}
}
object Terminal {
def apply(port: String, settings: SerialSettings) = Props(classOf[Terminal], port, settings)
}
{% endhighlight %}
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