systemmanagerif.java

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

/* 
 * Copyright (c) 2001 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.api.internal;
import seda.sandStorm.api.*;

/**
 * SystemManagerIF is an internal interface allowing modules 
 * to access systemwide features. For now this allows a module to 
 * access, create, and destroy thread managers. It also allows a 
 * module to create a stage with its own stage wrapper.
 */
public interface SystemManagerIF {

  /**
   * Get the default thread manager.
   */
  public ThreadManagerIF getThreadManager();

  /**
   * Get the thread manager registered under the given name.
   */
  public ThreadManagerIF getThreadManager(String name);

  /**
   * Add a thread manager to the system.
   */
  public void addThreadManager(String name, ThreadManagerIF threadmgr);

  /**
   * Create a stage from the given stage wrapper. 
   * If 'initialize' is true, the stage will be initialized immediately.
   * Returns a handle to the stage.
   */
  public StageIF createStage(StageWrapperIF wrapper, boolean initialize) 
    throws Exception;

}