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RootActorStarter.java
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RootActorStarter.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.base.service;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.util.List;
import org.eclipse.ditto.internal.utils.akka.AkkaClassLoader;
import org.eclipse.ditto.internal.utils.config.DefaultScopedConfig;
import akka.actor.ActorContext;
import akka.actor.ActorSystem;
/**
* Extension to start custom child actors in root actor.
*
* @since 3.0.0
*/
public interface RootActorStarter extends DittoExtensionPoint {
static final String CONFIG_PATH = "root-actor-starter";
/**
* Execute custom custom code.
*
* @param actorContext the context of the {@code GatewayRootActor}.
*/
void execute(ActorContext actorContext);
/**
* Loads the implementation of {@code RootActorStarter} which is configured for the
* {@code ActorSystem}.
*
* @param actorSystem the actorSystem in which the {@code RootActorStarter} should be loaded.
* @return the {@code RootActorStarter} implementation.
* @throws NullPointerException if {@code actorSystem} is {@code null}.
*/
static RootActorStarter get(final ActorSystem actorSystem) {
checkNotNull(actorSystem, "actorSystem");
final DefaultScopedConfig dittoScoped = DefaultScopedConfig.dittoScoped(actorSystem.settings().config());
final var implementation = dittoScoped.getString(CONFIG_PATH);
return AkkaClassLoader.instantiate(actorSystem, RootActorStarter.class,
implementation,
List.of(ActorSystem.class),
List.of(actorSystem));
}
}