afiletm.java

The Staged Event-Driven Architecture (SEDA) is a new design for building scalable Internet services.

/* 
 * Copyright (c) 2000 by Matt Welsh and The Regents of the University of 
 * California. All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice and the following
 * two paragraphs appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Author: Matt Welsh <[e-mail]>
 * 
 */

package seda.sandStorm.lib.aDisk;

import seda.sandStorm.api.*;
import seda.sandStorm.api.internal.*;
import java.io.*;

/**
 * Internal abstract class used to represent an AFile thread manager.
 */
abstract class AFileTM implements ThreadManagerIF {

  /**
   * Register a stage with this thread manager.
   */
  public abstract void register(StageWrapperIF stage);

  /**
   *
   * Deregister a stage with this thread manager.
   */
  public abstract void deregister(StageWrapperIF stage);

  /**
   * Start the thread manager.
   */
  public abstract void start();

  /**
   * Stop the thread manager and all threads managed by it.
   */
  public abstract void stop();

  /**
   * Enqueue an AFileRequest for this thread manager to handle.
   */
  public abstract void enqueueRequest(AFileRequest req);

}