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/*
 * Copyright (c) 2014 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();
}