/**
* Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
*/
package docs.extension;
//#imports
import akka.actor.Extension;
import akka.actor.AbstractExtensionId;
import akka.actor.ExtensionIdProvider;
import akka.actor.ActorSystem;
import akka.actor.ExtendedActorSystem;
import scala.concurrent.duration.Duration;
import com.typesafe.config.Config;
import java.util.concurrent.TimeUnit;
//#imports
import akka.actor.UntypedActor;
import org.junit.Test;
public class SettingsExtensionDocTest {
static
//#extension
public class SettingsImpl implements Extension {
public final String DB_URI;
public final Duration CIRCUIT_BREAKER_TIMEOUT;
public SettingsImpl(Config config) {
DB_URI = config.getString("myapp.db.uri");
CIRCUIT_BREAKER_TIMEOUT =
Duration.create(config.getDuration("myapp.circuit-breaker.timeout",
TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS);
}
}
//#extension
static
//#extensionid
public class Settings extends AbstractExtensionId<SettingsImpl>
implements ExtensionIdProvider {
public final static Settings SettingsProvider = new Settings();
private Settings() {}
public Settings lookup() {
return Settings.SettingsProvider;
}
public SettingsImpl createExtension(ExtendedActorSystem system) {
return new SettingsImpl(system.settings().config());
}
}
//#extensionid
static
//#extension-usage-actor
public class MyActor extends UntypedActor {
// typically you would use static import of the Settings.SettingsProvider field
final SettingsImpl settings =
Settings.SettingsProvider.get(getContext().system());
Connection connection =
connect(settings.DB_URI, settings.CIRCUIT_BREAKER_TIMEOUT);
//#extension-usage-actor
public Connection connect(String dbUri, Duration circuitBreakerTimeout) {
return new Connection();
}
public void onReceive(Object msg) {
}
//#extension-usage-actor
}
//#extension-usage-actor
public static class Connection {
}
@Test
public void demonstrateHowToCreateAndUseAnAkkaExtensionInJava() {
final ActorSystem system = null;
try {
//#extension-usage
// typically you would use static import of the Settings.SettingsProvider field
String dbUri = Settings.SettingsProvider.get(system).DB_URI;
//#extension-usage
} catch (Exception e) {
//do nothing
}
}
}