Akka modifying/creating configuration file from source code

Question

Is it possible to modify or create configuration file from source code. I am creating some client/server architecture with remoting. What I want to fulfill is ability to sta

Answer 1

Yes, you can modify or create the configuration in the code. The following excerpts are from the Akka documentation:

An example of modifying a configuration programmatically:

// make a Config with just your special setting
Config myConfig = ConfigFactory.parseString("something=somethingElse");

// load the normal config stack (system props, then application.conf, then reference.conf)
Config regularConfig = ConfigFactory.load();

// override regular stack with myConfig
Config combined = myConfig.withFallback(regularConfig);

// put the result in between the overrides (system props) and defaults again
Config complete = ConfigFactory.load(combined);

// create ActorSystem
ActorSystem system = ActorSystem.create("myname", complete);

An example of creating a configuration programmatically (this is in Scala, but you can adapt it for Java):

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

val customConf = ConfigFactory.parseString("""
  akka.actor.deployment {
    /my-service {
      router = round-robin-pool
      nr-of-instances = 3
    }
  }
""")

// ConfigFactory.load sandwiches customConfig between default reference
// config and default overrides, and then resolves it.
val system = ActorSystem("MySystem", ConfigFactory.load(customConf))