/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.concurrent;

import akka.actor.ActorSystem;
import akka.dispatch.ExecutionContexts;
import com.torodb.core.services.ExecutorTorodbService;
import org.apache.logging.log4j.Logger;
import scala.concurrent.Await;
import scala.concurrent.duration.Duration;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.function.Function;
import java.util.function.Supplier;

/**
 *
 */
public abstract class ActorSystemTorodbService
    extends ExecutorTorodbService<ExecutorService> {

  private ActorSystem actorSystem;
  private final String actorSystemName;

  public ActorSystemTorodbService(ThreadFactory threadFactory,
      Function<ThreadFactory, ExecutorService> executorServiceProvider,
      String actorSystemName) {
    super(threadFactory, executorServiceProvider);
    this.actorSystemName = actorSystemName;
  }

  public ActorSystemTorodbService(ThreadFactory threadFactory,
      Supplier<ExecutorService> executorServiceSupplier,
      String actorSystemName) {
    super(threadFactory, executorServiceSupplier);
    this.actorSystemName = actorSystemName;
  }

  protected abstract Logger getLogger();

  public ActorSystem getActorSystem() {
    return actorSystem;
  }

  @Override
  protected void startUp() throws Exception {
    super.startUp();
    actorSystem = ActorSystem.create(actorSystemName, null, null,
        ExecutionContexts.fromExecutorService(getExecutorService())
    );
  }

  @Override
  protected void shutDown() throws Exception {
    if (actorSystem != null) {
      try {
        Await.result(actorSystem.terminate(), Duration.Inf());
      } catch (Exception ex) {
        throw new RuntimeException("It was impossible to shutdown the "
            + "actor system with name " + actorSystemName, ex);
      }
    }
    getLogger().debug("Actor system with name {} terminated", actorSystemName);
    super.shutDown();
  }

}