Re: [akka-user] get the public address of an actorsystem

[Patrik Nordwall]

Hi John,

If you are using akka 2.1.0 RC2 you can grab that from

val myAddress = system.asInstanceOf[ExtendedActorSystem].provider.rootPath.address

  myAddress.host

  myAddress.port

If you prefer something nicer than the cast to ExtendedActorSystem you can place it in an extension.

http://doc.akka.io/docs/akka/2.1.0-RC2/scala/extending-akka.html

/Patrik

On Wed, Nov 21, 2012 at 3:33 PM, John <john.d...@gmail.com> wrote:

Hello,

after creating an actorsystem with this config :

  remote {

    netty {

      hostname = ""

      port = 0

    }

  }

I am curious how I can tell what hostname and the port the actorsystem is actually bound to. Ok, the documentation tells me the hostname will actually be InetAddress.getLocalHost.getHostAddress, but that's not really what I want (and how about the port anyway?)

Thanks,

John

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Patrik Nordwall

Typesafe - The software stack for applications that scale

Twitter: patriknw

[√iktor Ҡlang]

Also, a good question is what you need it for?

Cheers,

√

Viktor Klang

Akka Tech Lead

Typesafe - The software stack for applications that scale

Twitter: @viktorklang

[john doe]

Well, suppose I have two applications trying to talk to eachother using akka remoting, how do I tell them the address of the other app?

2012/11/21 √iktor Ҡlang <viktor...@gmail.com>

[Patrik Nordwall]

Yes, that's a very good question Viktor.

John, normally you don't. You send a message to the other system. It grabs the sender ActorRef, and can send messages back. No need to pass addresses explicitly.

/Patrik

Twitter: @patriknw

[john doe]

Sure, but how do you bootstrap this? in your example the first actorsystem knows the address of the other right?

2012/11/21 Patrik Nordwall <patrik....@gmail.com>

[Patrik Nordwall]

On Wed, Nov 21, 2012 at 4:25 PM, john doe <john.d...@gmail.com> wrote:

Sure, but how do you bootstrap this? in your example the first actorsystem knows the address of the other right?

yes, but that is not solved by grabbing your own address.

It's solved by configuration or by using Akka Cluster (experimental in 2.1.0-RC2)

[Patrik Nordwall]

On Wed, Nov 21, 2012 at 4:44 PM, John <john.d...@gmail.com> wrote:

Yes, it can also be solved using zookeeper, but for that I need the host:port of each app that will register itself, hence my original question

ok, that answers Viktor's question as well. Happy hAkking!

 

thanks!

[Patrik Nordwall]

John, an important heads-up. In upcoming version 2.1.0-RC3 you will have to change to

val myAddress = system.asInstanceOf[ExtendedActorSystem].provider.getDefaultAddress

/Patrik