ServerUtil.java

/**
 * This file is part of Oracle, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2015 Helion3 http://helion3.com/
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.helion3.oracle.utils;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import com.helion3.oracle.Oracle;

public class ServerUtil {
    private ServerUtil() {}

    public static int lookupServer(){
        return Oracle.oracleServer;
    }

    public static int lookupServer( String server ){
        // Look at cache first
        if( Oracle.oracleServer > 0 ){
            return Oracle.oracleServer;
        }

        Connection conn = null;
        PreparedStatement s = null;
        ResultSet rs = null;

        try {
            conn = Oracle.dbc();
            s = conn.prepareStatement( "SELECT server_id FROM oracle_servers WHERE server = ?" );
            s.setString(1, server);
            rs = s.executeQuery();

            if( rs.next() ){
                Oracle.oracleServer = rs.getInt("server_id");
                return rs.getInt("server_id");
            } else {
                return registerServer( server );
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if(rs != null) try { rs.close(); } catch (SQLException e) {}
            if(s != null) try { s.close(); } catch (SQLException e) {}
            if(conn != null) try { conn.close(); } catch (SQLException e) {}
        }

        return 0;
    }

    /**
     * Saves a player name to the database, and adds the id to the cache hashmap
     */
    protected static int registerServer( String server ){
        Connection conn = null;
        PreparedStatement s = null;
        ResultSet rs = null;

        try {
            conn = Oracle.dbc();
            s = conn.prepareStatement( "INSERT INTO oracle_servers (server) VALUES (?)" , Statement.RETURN_GENERATED_KEYS);
            s.setString(1, server);
            s.executeUpdate();

            rs = s.getGeneratedKeys();
            if (rs.next()) {
                Oracle.oracleServer = rs.getInt(1);
                return rs.getInt(1);
            } else {
                throw new SQLException("Insert statement failed - no generated key obtained.");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if(rs != null) try { rs.close(); } catch (SQLException e) {}
            if(s != null) try { s.close(); } catch (SQLException e) {}
            if(conn != null) try { conn.close(); } catch (SQLException e) {}
        }

        return 0;
    }
}