listrepositoriesservlet.java

这是外国一个开源推理机

/*  Sesame - Storage and Querying architecture for RDF and RDF Schema
 *  Copyright (C) 2001-2005 Aduna
 *
 *  Contact: 
 *  	Aduna
 *  	Prinses Julianaplein 14 b
 *  	3817 CS Amersfoort
 *  	The Netherlands
 *  	tel. [phone]
 *  	fax. [phone]
 *
 *  	http://aduna.biz/
 *  	http://www.openrdf.org/
 *  
 *  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.
 *
 *  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.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.openrdf.sesame.server.http;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.openrdf.util.http.HttpServerUtil;
import org.openrdf.util.log.ThreadLog;

import org.openrdf.sesame.config.RepositoryListWriter;
import org.openrdf.sesame.repository.local.LocalService;
import org.openrdf.sesame.server.SesameServer;

public class ListRepositoriesServlet extends SesameServlet {

	protected void _doGet(HttpServletRequest request, HttpServletResponse response) 
		throws ServletException, IOException
	{
		SesameServer.setThreadLogFile("list-repositories.log");
		_logIP(request);
		ThreadLog.log(">>> list repositories");

		try {
			LocalService service = SesameServer.getLocalService();

			_login(service);

			HTTPOutputStream httpOut = new HTTPOutputStream(response, "text/xml");
			httpOut.setUseGZIPCompression(HttpServerUtil.acceptsGZIPEncoding(request));
			httpOut.setCacheableResult(false);

			RepositoryListWriter repListWriter = new RepositoryListWriter();

			repListWriter.write(service.getRepositoryList(), httpOut);

			httpOut.close();
		}
		catch (IOException e) {
			ThreadLog.warning("I/O error, client connection closed?: " + e.getMessage());
		}
		catch (Exception e) {
			_sendInternalError("The server generated an error; Please inform the server administrator", e, response);
		}
	}
}