/*
* Copyright (C) 2004-2015 L2J Server
*
* This file is part of L2J Server.
*
* L2J Server 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.
*
* L2J Server 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 java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.l2jserver.Config;
import com.l2jserver.gameserver.util.Util;
import com.l2jserver.util.file.filter.HTMLFilter;
/**
* @author Layane
*/
public class HtmCache
{
private static final Logger _log = Logger.getLogger(HtmCache.class.getName());
private static final HTMLFilter HTML_FILTER = new HTMLFilter();
private static final Map _cache = Config.LAZY_CACHE ? new ConcurrentHashMap<>() : new HashMap<>();
private int _loadedFiles;
private long _bytesBuffLen;
protected HtmCache()
{
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();
if (files != null)
{
for (File file : files)
{
if (!file.isDirectory())
{
loadFile(file);
}
else
{
parseDir(file);
}
}
}
}
public String loadFile(File file)
{
if (!HTML_FILTER.accept(file))
{
return null;
}
final String relpath = Util.getRelativePath(Config.DATAPACK_ROOT, file);
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("(?s)", ""); // Remove html comments
String oldContent = _cache.put(relpath, content);
if (oldContent == null)
{
_bytesBuffLen += bytes;
_loadedFiles++;
}
else
{
_bytesBuffLen = (_bytesBuffLen - oldContent.length()) + bytes;
}
}
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, content);
}
return content;
}
private String getHtm(String path)
{
if ((path == null) || path.isEmpty())
{
return ""; // avoid possible NPE
}
String content = _cache.get(path);
// TODO: Check why some files do not get in cache on server startup.
if (content == null)
{
content = loadFile(new File(Config.DATAPACK_ROOT, path));
}
return content;
}
public boolean contains(String path)
{
return _cache.containsKey(path);
}
/**
* @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 HTML_FILTER.accept(new File(Config.DATAPACK_ROOT, path));
}
public static HtmCache getInstance()
{
return SingletonHolder._instance;
}
private static class SingletonHolder
{
protected static final HtmCache _instance = new HtmCache();
}
}