128 lines
3.7 KiB
Java
128 lines
3.7 KiB
Java
/*
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* Copyright (C) 2004-2015 L2J Server
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*
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* This file is part of L2J Server.
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*
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* L2J Server is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* L2J Server is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.gameserver.instancemanager;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.Map.Entry;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import com.l2jserver.L2DatabaseFactory;
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import com.l2jserver.gameserver.model.variables.AbstractVariables;
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/**
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* Global Variables Manager.
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* @author xban1x
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*/
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public final class GlobalVariablesManager extends AbstractVariables
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{
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private static final Logger _log = Logger.getLogger(GlobalVariablesManager.class.getName());
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// SQL Queries.
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private static final String SELECT_QUERY = "SELECT * FROM global_variables";
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private static final String DELETE_QUERY = "DELETE FROM global_variables";
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private static final String INSERT_QUERY = "INSERT INTO global_variables (var, value) VALUES (?, ?)";
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protected GlobalVariablesManager()
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{
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restoreMe();
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}
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@Override
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public boolean restoreMe()
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{
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// Restore previous variables.
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try (Connection con = L2DatabaseFactory.getInstance().getConnection();
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Statement st = con.createStatement();
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ResultSet rset = st.executeQuery(SELECT_QUERY))
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{
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while (rset.next())
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{
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set(rset.getString("var"), rset.getString("value"));
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}
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}
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catch (SQLException e)
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{
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_log.log(Level.WARNING, getClass().getSimpleName() + ": Couldn't restore global variables");
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return false;
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}
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finally
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{
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compareAndSetChanges(true, false);
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}
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_log.log(Level.INFO, getClass().getSimpleName() + ": Loaded " + getSet().size() + " variables.");
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return true;
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}
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@Override
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public boolean storeMe()
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{
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// No changes, nothing to store.
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if (!hasChanges())
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{
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return false;
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}
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try (Connection con = L2DatabaseFactory.getInstance().getConnection();
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Statement del = con.createStatement();
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PreparedStatement st = con.prepareStatement(INSERT_QUERY))
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{
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// Clear previous entries.
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del.execute(DELETE_QUERY);
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// Insert all variables.
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for (Entry<String, Object> entry : getSet().entrySet())
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{
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st.setString(1, entry.getKey());
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st.setString(2, String.valueOf(entry.getValue()));
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st.addBatch();
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}
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st.executeBatch();
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}
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catch (SQLException e)
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{
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_log.log(Level.WARNING, getClass().getSimpleName() + ": Couldn't save global variables to database.", e);
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return false;
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}
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finally
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{
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compareAndSetChanges(true, false);
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}
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_log.log(Level.INFO, getClass().getSimpleName() + ": Stored " + getSet().size() + " variables.");
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return true;
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}
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/**
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* Gets the single instance of {@code GlobalVariablesManager}.
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* @return single instance of {@code GlobalVariablesManager}
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*/
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public static final GlobalVariablesManager getInstance()
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{
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return SingletonHolder._instance;
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}
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private static class SingletonHolder
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{
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protected static final GlobalVariablesManager _instance = new GlobalVariablesManager();
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}
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} |