/*

 *   SONEWS News Server

 *   see AUTHORS for the list of contributors

 *

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU 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 General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.sonews.feed;

import java.util.List;

import org.sonews.storage.Article;

import org.sonews.storage.StorageBackendException;

import org.sonews.storage.StorageManager;

/**

 * Controlls push and pull feeder.

 * @author Christian Lins

 * @since sonews/0.5.0

 */

public final class FeedManager 

{

  public static final int TYPE_PULL = 0;

  public static final int TYPE_PUSH = 1;

  private static PullFeeder pullFeeder = new PullFeeder();

  private static PushFeeder pushFeeder = new PushFeeder();

  /**

   * Reads the peer subscriptions from database and starts the appropriate

   * PullFeeder or PushFeeder.

   */

  public static synchronized void startFeeding()

    throws StorageBackendException

  {

    List<Subscription> subsPull = StorageManager.current()

      .getSubscriptions(TYPE_PULL);

    for(Subscription sub : subsPull)

    {

      pullFeeder.addSubscription(sub);

    }

    pullFeeder.start();

    List<Subscription> subsPush = StorageManager.current()

      .getSubscriptions(TYPE_PUSH);

    for(Subscription sub : subsPush)

    {

      pushFeeder.addSubscription(sub);

    }

    pushFeeder.start();

  }

  public static void queueForPush(Article article)

  {

    pushFeeder.queueForPush(article);

  }

  private FeedManager() {}

}