statelessobject.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 180 行

/*
 * Copyright (c) 1998-2008 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.ejb.session;

import com.caucho.ejb.*;
import com.caucho.ejb.protocol.*;

import java.util.logging.*;
import java.io.*;
import java.rmi.*;
import javax.ejb.*;

/**
 * Abstract base class for a 3.0 session object
 */
abstract public class StatelessObject extends AbstractEJBObject
  implements EJBLocalObject, EJBObject
{
  private static final Logger log
    = Logger.getLogger(StatelessObject.class.getName());
  
  protected final StatelessServer _server;
  protected final Class _api;

  protected StatelessObject(StatelessServer server, Class api)
  {
    _server = server;
    _api = api;
  }

  /**
   * Returns the stateless server.
   */
  public StatelessServer getStatelessServer()
  {
    return _server;
  }

  /**
   * Returns the stateless server.
   */
  public AbstractServer getServer()
  {
    return _server;
  }
  
  /*
   * Returns the handle.
   */
  public Handle getHandle()
  {
    return getServer().getHandleEncoder().createHandle(__caucho_getId());
  }

  /**
   * Returns the EJBHome stub for the container.
   */
  public EJBHome getEJBHome()
  {
    try {
      return getServer().getEJBHome();
    } catch (Exception e) {
      log.log(Level.FINE, e.toString(), e);
      return null;
    }
  }

  /**
   * Returns the EJBLocalHome stub for the container.
   */
  public EJBLocalHome getEJBLocalHome()
  {
    try {
      return (EJBLocalHome) getServer().getEJBLocalHome();
    } catch (Exception e) {
      log.log(Level.FINE, e.toString(), e);
      return null;
    }
  }

  public Object getPrimaryKey()
  {
    throw new UnsupportedOperationException();
  }

  /**
   * Returns the SessionBean's primary stub
   */
  public EJBObject getEJBObject()
  {
    return this;
  }

  /**
   * Returns the SessionBean's primary stub
   */
  public EJBLocalObject getEJBLocalObject()
  {
    return this;
  }

  /**
   * Returns the server.
   */
  public AbstractServer __caucho_getServer()
  {
    return getServer();
  }

  /**
   * The home id is null.
   */
  public String __caucho_getId()
  {
    return "::ejb:stateless";
  }

  //
  // EJB 2.1 methods
  //

  /**
   * Returns true if the two objects are identical.
   */
  public boolean isIdentical(EJBObject obj) throws RemoteException
  {
    return getHandle().equals(obj.getHandle());
  }

  /**
   * Returns true if the two objects are identical.
   */
  public boolean isIdentical(EJBLocalObject obj)
  {
    return this == obj;
  }

  /**
   * Serialize the HomeSkeletonWrapper in place of this object.
   *
   * @return the matching skeleton wrapper.
   */
  public Object writeReplace() throws ObjectStreamException
  {
    return _server.getObjectHandle(this, _api);
  }

  public void remove()
    throws javax.ejb.RemoveException
  {
  }
}