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package com.github.jodersky.flow
import akka.actor.{ Actor, ActorLogging, ActorRef, Props, Terminated, actorRef2Scala }
import internal.{ Reader, SerialConnection, ThreadDied }
import java.nio.ByteBuffer
/**
* Operator associated to an open serial port. All communication with a port is done via an operator. Operators are created though the serial manager.
* @see SerialManager
*/
class SerialOperator(connection: SerialConnection, bufferSize: Int, client: ActorRef) extends Actor with ActorLogging {
import SerialOperator._
import context._
val readBuffer = ByteBuffer.allocateDirect(bufferSize)
val reader = new Reader(connection, readBuffer, self, client)
val writeBuffer = ByteBuffer.allocateDirect(bufferSize)
context.watch(client)
client ! Serial.Opened(connection.port)
reader.start()
override def postStop = {
connection.close()
}
def receive: Receive = {
case Serial.Write(data, ack) => {
writeBuffer.clear()
data.copyToBuffer(writeBuffer)
val sent = connection.write(writeBuffer)
if (ack != Serial.NoAck) sender ! ack(sent)
}
case Serial.Close => {
client ! Serial.Closed
context stop self
}
case Terminated(`client`) => {
context stop self
}
//go down with reader thread
case ThreadDied(`reader`, ex) => throw ex
}
}
object SerialOperator {
def apply(connection: SerialConnection, bufferSize: Int, client: ActorRef) = Props(classOf[SerialOperator], connection, bufferSize, client)
}
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