com.caucho.cloud.topology.TriadDispatcher Maven / Gradle / Ivy

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/*
 * Copyright (c) 1998-2018 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.cloud.topology;

/**
 * Selects one of the triad members, given the triad owner.
 */
public class TriadDispatcher {
  
  public static  TriadDispatcher create(T a, T b, T c)
  {
    if (a == null) {
      return new TriadDispatcher();
    }
    else if (b == null) {
      return new TriadDispatcherSingle(a);
    }
    else if (c == null) {
      return new TriadDispatcherDouble(a, b);
    }
    else {
      return new TriadDispatcherTriple(a, b, c);
    }
  }
  
  /**
   * Returns member A
   */
  public X getA()
  {
    return null;
  }

  /**
   * Returns member B
   */
  public X getB()
  {
    return null;
  }

  /**
   * Returns member C
   */
  public X getC()
  {
    return null;
  }

  /**
   * Returns the primary server.
   */
  public X primary(TriadOwner owner)
  {
    return null;
  }
  
  /**
   * Returns the secondary server.
   */
  public X secondary(TriadOwner owner)
  {
    return null;
  }
  
  /**
   * Returns the tertiary server.
   */
  public X tertiary(TriadOwner owner)
  {
    return null;
  }
}