| Clover coverage report - |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| DataManager.java | 0% | 0% | 0% | 0% |
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/*
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VRMoo Server - Virtual Reality Object Oriented MUD Server
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Copyright (C) 2001 - 2003 VRMoo Development Team
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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For information about VRMoo and its authors, please visit the website:
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http://www.vrmoo.org/
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*/
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package org.vrmoo.server.data;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.IOException;
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import java.io.PrintWriter;
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import org.vrmoo.common.exception.VRMooParseException;
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import org.vrmoo.common.util.FileUtility;
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import org.vrmoo.common.util.ParserUtility;
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import org.vrmoo.server.command.GetNextIDCommand;
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import org.vrmoo.server.data.update.Update;
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import org.vrmoo.server.data.update.UpdateFactory;
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/**
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* This class manages the server data directory. If the server starts up and
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* the data directory does not exist, copy the "default-data" directory into
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* the "data" directory. This class also manages version information for the
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* server data directory. If the data directory is using an old version, this
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* class will update it to the current version.
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*
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* @author Jeff Weston
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*/
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public class DataManager |
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{
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/**
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* The current version of the VRMoo Server data directory.
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*/
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private static final int CUR_VERSION = 3; |
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/**
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* This class is not meant to be instantiated, so keep the default
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* constructor private.
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*/
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private DataManager( )
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{
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} |
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/**
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* Initialize the data directory for use. Checks for the existence of the
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* data directory. If it doesn't exist, use the default data directory.
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* Also checks the version of the data directory. If the data directory is
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* using an old version, update it. Once done, this method instructs other
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* classes that rely on the data directory to load their data.
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*/
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public static synchronized void init( ) |
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{
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try
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{
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File dataDir = new File( "data" ); |
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if ( ! dataDir.exists( ) )
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{
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System.out.println( "Data directory not found." );
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System.out.println( "Using default data directory." );
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FileUtility.copyDirectory( "default-data", "data" ); |
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} |
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} |
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catch ( Exception e )
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{
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e.printStackTrace( ); |
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} |
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handleUpdates( ); |
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WorldManager.init( ); |
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GetNextIDCommand.getInstance( ).loadData( ); |
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} |
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/**
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* Instructs all of the classes that have data in the data directory to
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* save their data to disk. Once that is complete, this method writes out
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* a data file indicating the version of the data directory.
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*/
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public static synchronized void saveData( ) |
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{
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WorldManager.saveData( ); |
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GetNextIDCommand.getInstance( ).saveData( ); |
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try
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{
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PrintWriter printWriter = FileUtility.getPrintWriter( |
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"data/version.dat" );
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printWriter.println( CUR_VERSION ); |
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printWriter.close( ); |
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} |
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catch ( Exception e )
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{
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e.printStackTrace( ); |
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} |
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} |
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/**
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* Deal with older versions of the data directory that need to be updated.
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*/
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private static void handleUpdates( ) |
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{
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try
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{
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int version = getCurrentVersion( );
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while ( version != CUR_VERSION )
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{
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Update update = UpdateFactory.createUpdate( version ); |
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update.update( ); |
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version = getCurrentVersion( ); |
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} |
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} |
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catch ( Exception e )
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{
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e.printStackTrace( ); |
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} |
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} |
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/**
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* Get the current version of the VRMoo Server data directory.
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*
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* @return the current version of the VRMoo Server data directory
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*
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* @throws IOException for any IO errors that occur
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* @throws VRMooParseException for any parsing errors that occur
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*/
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private static int getCurrentVersion( ) |
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throws IOException, VRMooParseException
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{
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BufferedReader reader = FileUtility.getBufferedReader( |
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"data/version.dat" );
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String line = reader.readLine( ); |
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reader.close( ); |
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return ParserUtility.parseInt( line );
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} |
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} |
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