/*
 * SonarQube
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
import org.sonar.api.BatchExtension;
import org.sonar.api.batch.InstantiationStrategy;
import org.sonar.api.config.Settings;

@InstantiationStrategy(InstantiationStrategy.PER_BATCH)
public class BatchService implements BatchExtension {
  private boolean started=false;
  private int projectServices=0;
  private Settings settings;
  
  public BatchService(Settings settings) {
    this.settings = settings;
  }

  public void start() {
    if (!settings.getBoolean("extension.lifecycle")) {
      return;
    }
    System.out.println("Start BatchService");
    if (started) {
      throw new IllegalStateException("Already started");
    }
    if (projectServices>0) {
      throw new IllegalStateException("BatchService must be started before ProjectServices");
    }
    started=true;
  }

  public boolean isStarted() {
    return started;
  }

  public void stop() {
    if (!settings.getBoolean("extension.lifecycle")) {
      return;
    }
    System.out.println("Stop BatchService");
    if (!started) {
      System.out.println("BatchService is not started !");
      System.exit(1);
    }
    if (projectServices!=3) {
      // there are three maven modules in the project extension-lifecycle (pom + 2 modules)
      System.out.println("Invalid nb of ProjectServices: " + projectServices);
      System.exit(1);
    }
    started=false;
  }

  public void incrementProjectService() {
    projectServices++;
  }
}