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Gemini is a web framework created by TechEmpower.
There is a newer version: 3.3.14
/*******************************************************************************
 * Copyright (c) 2018, TechEmpower, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name TechEmpower, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL TECHEMPOWER, INC. BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *******************************************************************************/

package com.techempower.asynchronous;

/**
 * Implementations of Asynchronous are started by the application once the 
 * application's initialization and configuration is complete.  Asynchronous 
 * components are ended by the application when it is shutting down.  A common
 * use-case is a component that runs periodic actions on a thread.  The 
 * thread's start should be postponed until the application is configured and
 * the thread should be stopped when the application is shut down. 
 *   
 * Components that implement this interface should register with the 
 * application by calling application.addAsynchronous().
 *   
 * The TechEmpowerApplication will only call begin() and end() once each per
 * application life-cycle.
 */
public interface Asynchronous
{

  //
  // Public member methods.
  //

  /**
   * Starts this asynchronous resource.
   */
  void begin();

  /**
   * Stops this asynchronous resource.
   */
  void end();

}  // End Asynchronous.