userregistrator.java

来自「主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32」· Java 代码 · 共 141 行

/**
 * $Log: UserRegistrator.java,v $
 * Revision 1.1  2003/01/16 13:12:40  mwulff
 * initial version
 *
 * Revision 1.4  2002/12/20 18:52:25  mwulff
 * no message
 *
 * Revision 1.3  2002/12/15 16:55:07  mwulff
 * adjusted to reorganisation of the client logging system
 *
 * Revision 1.2  2002/12/14 22:43:44  mwulff
 * no message
 *
 * Revision 1.1  2002/12/13 20:08:22  mwulff
 * no message
 *
 */
package de.fhm.jkf.comm.cl;

import de.fhm.jkf.comm.clsv.JKFCommunicationException;
import de.fhm.jkf.comm.clsv.RegisterRequest;
import de.fhm.jkf.comm.clsv.Response;
import de.fhm.jkf.resource.cl.JKFClientLogger;

/**
 * @author	marten wulff
 * 
 * * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Marten Wulff
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library 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
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 * 
 * <p>
 * The UserRegistrator class is used by JKFFactory to make an
 * initial request to the JKFBroker. <br>
 * </p>
 * <p>
 * Along with this request a hopefully unique user name is passed to the server<br>
 * which is used to create an appender for LoggingEvents coming from<br>
 * this user. As Response the UserRegistrator receives a session id <br>
 * from the server, which is stored in the SessionManager. This session<br>
 * id is send to the server every time the client connects, so that the <br>
 * server can determin the clients HttpSession.<br>
 * If the registration of a user fails, the jkf framework is shutting down.<br>
 * </p>
 * <p>
 * This class is used only internally by the JKFFactory.
 * </p>
 */
class UserRegistrator extends CommunicationHandler {
	
	/**
	 * Constructor for UserRegistrator.
	 */
	UserRegistrator() {
		super();
	}
	
	/**
	 * Method for registering a new user at the jkf server.
	 */
	void registerUser() throws Exception {
		
		RegisterRequest request = new RegisterRequest();
		Response response = null;
		
		request.setUserName(generateUserName());

		wrapper = new URLConnectionStreamWrapper(this.requestBrokerServlet.openConnection());
		compressionHandler.setStreamWrapper(wrapper);	

		this.compressionHandler.sendObject(request);
		response = (Response) this.compressionHandler.receiveObject();
	
		handleSessionInfo();
		
		followUpConnection(response);
							
		// check if any exceptions on server side occured
		if (response.errorOccured()) {
			Exception ex = response.getRemoteException();
			throw new JKFCommunicationException(ex);
		}		
	}
	
	/**
	 * Method for storing the retrieved session information from 
	 * the server. If no session information is available, the 
	 * JKF Framework is shutting down.
	 */
	private void handleSessionInfo() {
		String sessionInfo = wrapper.getSessionInfo();
		if(sessionInfo == null) {
			JKFClientLogger.fatal("Couldn't retrieve session info from server");
			JKFClientLogger.fatal("Shutting down ...");
			System.exit(-1);
		}else {		
			if(JKFClientLogger.isDebugEnabled()) {
				JKFClientLogger.debug("Got session info from server: " + sessionInfo);
			}				
			
			// set the session info 
			SessionManager.instance().setSessionInfo(sessionInfo);
		}
	}

		
	private String generateUserName() {
		String user = System.getProperty("user.name");
		user.replace(':', '_');
		user.replace('?', '_');
		user.replace('*', '_');		
		user.replace('|', '_');
		user.replace('<', '_');
		user.replace('>', '_');
		user.replace('/', '_');
		user.replace('\\', '_');
		user.replace('\"', '_');										
		
		return user;
	}	

}