VersionChangeListener.java

/*
 * 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.mongodb.repl.topology;

import com.torodb.mongodb.commands.pojos.ReplicaSetConfig;

/**
 *
 */
@FunctionalInterface
interface VersionChangeListener {

  /**
   * A callback called after the configuration contained by the {@link TopologyCoordinator} has
   * changed.
   *
   * @param coord     the topology coordinator
   * @param oldConfig the older configuration. The new one can be obtained by calling
   *                  {@link TopologyCoordinator#getRsConfig()}
   */
  public void onVersionChange(TopologyCoordinator coord, ReplicaSetConfig oldConfig);

}