deletegetnodesservlet.java

来自「opennms得相关源码 请大家看看」· Java 代码 · 共 122 行

//
// This file is part of the OpenNMS(R) Application.
//
// OpenNMS(R) is Copyright (C) 2002-2003 The OpenNMS Group, Inc.  All rights reserved.
// OpenNMS(R) is a derivative work, containing both original code, included code and modified
// code that was published under the GNU General Public License. Copyrights for modified 
// and included code are below.
//
// OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
//
// Copyright (C) 1999-2001 Oculan Corp.  All rights reserved.
//
// 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
// (at your option) any later version.
//
// 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.
//
// For more information contact:
//      OpenNMS Licensing       <[e-mail]>
//      http://www.opennms.org/
//      http://www.opennms.com/
//

package org.opennms.web.admin.nodeManagement;

import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.opennms.netmgt.config.DatabaseConnectionFactory;

/**
 * A servlet that handles querying the database for node information
 * 
 * @author <A HREF="mailto:[e-mail]">Tarus Balog </A>
 * @author <A HREF="http://www.opennms.org/">OpenNMS </A>
 */
public class DeleteGetNodesServlet extends HttpServlet {
    private static final String NODE_QUERY =
    // "SELECT nodeid, nodelabel FROM node ORDER BY nodelabel, nodeid";
    "SELECT nodeid, nodelabel FROM node WHERE nodetype != 'D' ORDER BY nodelabel, nodeid";

    public void init() throws ServletException {
        try {
            DatabaseConnectionFactory.init();
        } catch (Exception e) {
        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession user = request.getSession(true);

        try {
            user.setAttribute("listAll.delete.jsp", getAllNodes(user));
        } catch (SQLException e) {
            throw new ServletException(e);
        }

        // forward the request for proper display
        RequestDispatcher dispatcher = this.getServletContext().getRequestDispatcher("/admin/delete.jsp");
        dispatcher.forward(request, response);
    }

    /**
     */
    private List getAllNodes(HttpSession userSession) throws SQLException {
        Connection connection = null;
        List allNodes = new ArrayList();
        int lineCount = 0;

        try {
            connection = DatabaseConnectionFactory.getInstance().getConnection();

            Statement stmt = connection.createStatement();
            ResultSet nodeSet = stmt.executeQuery(NODE_QUERY);

            if (nodeSet != null) {
                while (nodeSet.next()) {
                    ManagedNode newNode = new ManagedNode();
                    newNode.setNodeID(nodeSet.getInt(1));
                    newNode.setNodeLabel(nodeSet.getString(2));
                    allNodes.add(newNode);

                }
            }
            // FIXME: linecount never modified???
            userSession.setAttribute("lineItems.delete.jsp", new Integer(lineCount));

            nodeSet.close();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                }
            }
        }

        return allNodes;
    }
}