import static groovyx.gpars.actor.Actors.actor
def console = actor {
    loop {
        react {
            println it
        }
    }

class CustomActor extends DefaultActor {
    @Override protected void act() {
        loop {
            react {
                println it
            }
        }
    }
}
def console=new CustomActor()
console.start()

console.send('Message')
console << 'Message'
console.sendAndContinue 'Message', {reply -> println "I received reply: $reply"}
console.sendAndWait 'Message'

import static groovyx.gpars.actor.Actors.actor
def me = actor {
    friend.send('Hi')
    react(30.seconds) {msg ->
        if (msg == Actor.TIMEOUT) {
            friend.send('I see, busy as usual. Never mind.')
            stop()
        } else {
            //continue conversation
        }
    }
}
me.join()

import static groovyx.gpars.actor.Actors.actor
def me = actor {
    delegate.metaClass.onTimeout = {->
        friend.send('I see, busy as usual. Never mind.')
        stop()
    }
    friend.send('Hi')
    react(30.seconds) {
        //continue conversation
    }
}
me.join()

def coreActors = new NonDaemonPGroup(5)  //5 non-daemon threads pool
def helperActors = new DefaultPGroup(1)  //1 daemon thread pool
def priceCalculator = coreActors.actor {
…
}
def paymentProcessor = coreActors.actor {
…
}
def emailNotifier = helperActors.actor {
…
}
def cleanupActor = helperActors.actor {
…
}
//increase size of the core actor group
coreActors.resize 6
//shutdown the group's pool once you no longer need the group to release resources
helperActors.shutdown()

final Actor actor = new DynamicDispatchActor({
    when {String msg -> println 'A String'; reply 'Thanks'}
    when {Double msg -> println 'A Double'; reply 'Thanks'}
    when {msg -> println 'A something ...'; reply 'What was that?'}
})
actor.start()

import groovyx.gpars.actor.Actors
final def doubler = Actors.reactor {
    2 * it
}.start()