PubSub in Scala Redis - scala

Question

I am new to the Scala and Redis world and I am trying to do something simple:
I want to subscribe to a channel in order to be notified when new keys are added (My idea is just to set the key and publish in a channel that the key was added).
As I was reading in the website, scala-redis is the most updated of the recommended versions, so I decided to use it.
I am having some problems with the subscribing part. I have the following code:
import com.redis._
val r = new RedisClient("localhost", 6379)
r.subscribe("modifications","modifications","subscribe")
I am getting the following error message:
error: missing arguments for method subscribe in trait PubSub; follow
this method with `_' if you want to treat it as a partially applied
function
I was checking the documentation and the function looks like this:
def subscribe(channel: String, channels: String*)(fn: PubSubMessage => Any) {
if (pubSub == true) { // already pubsub ing
subscribeRaw(channel, channels: _*)
} else {
pubSub = true
subscribeRaw(channel, channels: _*)
new Consumer(fn).start
}
}
To be honest, I don't know what I am doing wrong. If someone could help me with some ideas, it would be great.
Thanks

Answer 1

You need to provide a function to handle the received message:
r.subscribe("modifications","modifications","subscribe"){ m => println(m) }
Unfortunately most of the documentation is in the code, but it might help if you take a look at the PubSubDemo or PubSubSpec.