yooli88

          ManagerFactory

          /*
           * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/ManagerFactory.java,v 1.6 2005/01/18 11:52:08 minhnn Exp $
           * $Author: minhnn $
           * $Revision: 1.6 $
           * $Date: 2005/01/18 11:52:08 $
           *
           * ====================================================================
           *
           * Copyright (C) 2002-2005 by MyVietnam.net
           *
           * This program 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 any later version.
           *
           * All copyright notices regarding mvnForum MUST remain intact
           * in the scripts and in the outputted HTML.
           * The "powered by" text/logo with a link back to
           * http://www.mvnForum.com and http://www.MyVietnam.net in the
           * footer of the pages MUST remain visible when the pages
           * are viewed on the internet or intranet.
           *
           * This program 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. See the
           * GNU General Public License for more details.
           *
           * You should have received a copy of the GNU General Public License
           * along with this program; if not, write to the Free Software
           * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
           *
           * Support can be obtained from support forums at:
           * http://www.mvnForum.com/mvnforum/index
           *
           * Correspondence and Marketing Questions can be sent to:
           * info@MyVietnam.net
           *
           * @author: Luis Miguel Hernanz <luish@germinus.com>
           * @author: Minh Nguyen  minhnn@MyVietnam.net
           */
          package com.mvnforum;

          import org.apache.commons.logging.Log;
          import org.apache.commons.logging.LogFactory;
          import com.mvnforum.auth.Authenticator;
          import com.mvnforum.auth.OnlineUserFactory;

          /**
           * Instance that returns the right implementation for the different
           * parts of the mvnforum system.
           *
           * @author <a href="luish@germinus.com">Luis Miguel Hernanz</a>
           * @version $Revision: 1.6 $
           */
          // @todo : split this class to new class DAOFactory
          public class ManagerFactory {

              private static Log log = LogFactory.getLog(ManagerFactory.class);

              /**
               * Creates a new <code>ManagerFactory</code> instance.
               */
              protected ManagerFactory() {}

              private static OnlineUserFactory onlineUserFactory = null;
              private static Authenticator authenticator = null;
              private static RequestProcessor requestProcessor = null;

              public static synchronized OnlineUserFactory getOnlineUserFactory() {
                  if (onlineUserFactory == null) {
                      try {
                          Class c = Class.forName(MVNForumFactoryConfig.getOnlineUserFactoryClassName());
                          onlineUserFactory = (OnlineUserFactory) c.newInstance();
                          log.info("onlineUserFactory = " + onlineUserFactory);
                      } catch (Exception e) {
                          log.error("Error returning the online user factory.", e);
                          throw new RuntimeException(e.getMessage());
                      }
                  }
                  return onlineUserFactory;
              }

              public static synchronized Authenticator getAuthenticator() {
                  try {
                      String authenticatorClass = MVNForumFactoryConfig.getAuthenticatorClassName();
                      if ((null != authenticatorClass) && !authenticatorClass.trim().equals("")) {
                          log.debug("Using the authenticator: " + authenticatorClass);
                          if (authenticator == null) {
                              Class c = Class.forName(authenticatorClass);
                              authenticator = (Authenticator) c.newInstance();
                              log.info("authenticator = " + authenticator);
                          }
                          return authenticator;
                      }
                  } catch (Exception e){
                      log.error("Error getting the authentication object", e);
                  }
                  return null;
              }

              public static synchronized RequestProcessor getRequestProcessor() {
                  if (requestProcessor == null) {
                      try {
                          Class c = Class.forName(MVNForumFactoryConfig.getRequestProcessorClassName());
                          requestProcessor = (RequestProcessor) c.newInstance();
                          log.info("requestProcessor = " + requestProcessor);
                      } catch (Exception e) {
                          // This should never happen
                          log.error("Error returning the requestProcessor.", e);
                          throw new RuntimeException(e.getMessage());
                      }
                  }
                  return requestProcessor;
              }
          }

          posted on 2007-09-11 11:30 迷茫在java的世界里 閱讀(160) 評論(0)  編輯  收藏 所屬分類: mvn學習筆記

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