/*-
 * -\-\-
 * Helios Services
 * --
 * Copyright (C) 2016 Spotify AB
 * --
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * -/-/-
 */

package com.spotify.helios.servicescommon;

import com.google.common.util.concurrent.Service;

public interface Reactor extends Service {

  interface Callback {
    void run(boolean timeout) throws InterruptedException;
  }

  /**
   * Send a signal to trigger the reactor. Does not block.
   */
  void signal();

  /**
   * Returns a runnable that calls {@link #signal()}.
   *
   * @return The runnable object.
   */
  Runnable signalRunnable();
}
