How to write APNs server side code in scala? - scala

Question

I'm stuck at a very annoying problem.
I'm working with javaPNS and following one of the many guides on internet.
Here: https://code.google.com/p/javapns/wiki/PushNotificationAdvanced
/* Push your custom payload */
List<PushedNotification> notifications = Push.payload(payload, keystore, password, production, devices);
where you see this, above. It says that Push.payload() returns a List with PushedNotificaion.
Well, it doesn't in my code.
object Push {
def devPush(pushAlertMessage: String, badgeNumber: Int, devices: Seq[String]): List[PushedNotification] = {
//Retrieve the .p12 certification file
val keystoreFile = getClass.getResourceAsStream("keystorefile.p12")
//Create payload
val payload = PushNotificationPayload.complex()
payload.addBadge(badgeNumber)
payload.addAlert(pushAlertMessage)
payload.addSound("default")
//
val notifications:List[PushedNotification] = javapns.Push.payload(payload, keystoreFile, keystorePassword, false, devices)
for(notification <- javapns.Push.alert(pushAlertMessage, keystoreFile, keystorePassword, false, devices).getFailedNotifications){
/* Add code here to remove invalid tokens from database */
}
notifications
}
}
When I try to put a list in my val notifications with Push.payload it says:
"Express of type PushedNotifications doesn't conform to expected type List[PushedNotification]"
I'm tired and confused, not certain about the rest of the code either. Would appreciate any help and please. Correct my code if I'm wrong.

Answer 1

You are missing an implicit conversion from the java.util.List returned and the scala List that you want. Try adding the following import:
import scala.collection.JavaConversions._
And tweak this line:
val notifications:List[PushedNotification] = javapns.Push.payload(payload, keystoreFile, keystorePassword, false, devices)
To this:
val notifications:List[PushedNotification] = javapns.Push.payload(payload, keystoreFile, keystorePassword, false, devices).toList
Also, it looks like you will be pushing two times to each device here as the calls to payload and alert both push notifications to the devices. If you only really wanted to send the complex payload that you build, then your code should probably be:
val results = javapns.Push.payload(payload, keystoreFile, keystorePassword, false, devices)
for(notification <- result.getFailedNotifications.toList){
/* Add code here to remove invalid tokens from database */
}