/*
* 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 3 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, see .
*/
package com.l2jserver.gameserver.cache;
import gnu.trove.map.hash.TIntObjectHashMap;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.l2jserver.Config;
import com.l2jserver.gameserver.util.L2TIntObjectHashMap;
import com.l2jserver.gameserver.util.Util;
import com.l2jserver.util.file.filter.HTMLFilter;
/**
* @author Layane
*/
public class HtmCache
{
private static Logger _log = Logger.getLogger(HtmCache.class.getName());
private static final HTMLFilter htmlFilter = new HTMLFilter();
private final TIntObjectHashMap _cache;
private int _loadedFiles;
private long _bytesBuffLen;
public static HtmCache getInstance()
{
return SingletonHolder._instance;
}
protected HtmCache()
{
if (Config.LAZY_CACHE)
{
_cache = new L2TIntObjectHashMap<>();
}
else
{
_cache = new TIntObjectHashMap<>();
}
reload();
}
public void reload()
{
reload(Config.DATAPACK_ROOT);
}
public void reload(File f)
{
if (!Config.LAZY_CACHE)
{
_log.info("Html cache start...");
parseDir(f);
_log.info("Cache[HTML]: " + String.format("%.3f", getMemoryUsage()) + " megabytes on " + getLoadedFiles() + " files loaded");
}
else
{
_cache.clear();
_loadedFiles = 0;
_bytesBuffLen = 0;
_log.info("Cache[HTML]: Running lazy cache");
}
}
public void reloadPath(File f)
{
parseDir(f);
_log.info("Cache[HTML]: Reloaded specified path.");
}
public double getMemoryUsage()
{
return ((float) _bytesBuffLen / 1048576);
}
public int getLoadedFiles()
{
return _loadedFiles;
}
private void parseDir(File dir)
{
final File[] files = dir.listFiles();
for (File file : files)
{
if (!file.isDirectory())
{
loadFile(file);
}
else
{
parseDir(file);
}
}
}
public String loadFile(File file)
{
if (!htmlFilter.accept(file))
{
return null;
}
final String relpath = Util.getRelativePath(Config.DATAPACK_ROOT, file);
final int hashcode = relpath.hashCode();
String content = null;
try (FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);)
{
final int bytes = bis.available();
byte[] raw = new byte[bytes];
bis.read(raw);
content = new String(raw, "UTF-8");
content = content.replaceAll("\r\n", "\n");
String oldContent = _cache.get(hashcode);
if (oldContent == null)
{
_bytesBuffLen += bytes;
_loadedFiles++;
}
else
{
_bytesBuffLen = (_bytesBuffLen - oldContent.length()) + bytes;
}
_cache.put(hashcode, content);
}
catch (Exception e)
{
_log.log(Level.WARNING, "Problem with htm file " + e.getMessage(), e);
}
return content;
}
public String getHtmForce(String prefix, String path)
{
String content = getHtm(prefix, path);
if (content == null)
{
content = "My text is missing:
" + path + "";
_log.warning("Cache[HTML]: Missing HTML page: " + path);
}
return content;
}
public String getHtm(String prefix, String path)
{
String newPath = null;
String content;
if ((prefix != null) && !prefix.isEmpty())
{
newPath = prefix + path;
content = getHtm(newPath);
if (content != null)
{
return content;
}
}
content = getHtm(path);
if ((content != null) && (newPath != null))
{
_cache.put(newPath.hashCode(), content);
}
return content;
}
private String getHtm(String path)
{
if ((path == null) || path.isEmpty())
{
return ""; // avoid possible NPE
}
final int hashCode = path.hashCode();
String content = _cache.get(hashCode);
if (Config.LAZY_CACHE && (content == null))
{
content = loadFile(new File(Config.DATAPACK_ROOT, path));
}
return content;
}
public boolean contains(String path)
{
return _cache.containsKey(path.hashCode());
}
/**
* @param path The path to the HTM
* @return {@code true} if the path targets a HTM or HTML file, {@code false} otherwise.
*/
public boolean isLoadable(String path)
{
return htmlFilter.accept(new File(path));
}
private static class SingletonHolder
{
protected static final HtmCache _instance = new HtmCache();
}
}