/*
* TextCacheManager.java
*
* 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 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Author: Winter Lau
* http://dlog4j.sourceforge.net
* 2006-5-12
*/
package com.liusoft.dlog4j;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.liusoft.dlog4j.util.StringUtils;
/**
* ���ı����洦��
* {base}/{type}/{id/10000}/id.htm
* @author liudong
* @call_by
*/
public class TextCacheManager {
private final static Log log = LogFactory.getLog(TextCacheManager.class);
private static String basePath;
/**
* ��ʼ�����Ŀ¼
* @param arg0
*/
public synchronized static void init(String arg0){
if(basePath == null){
if(!StringUtils.equals("/", File.separator))
basePath = StringUtils.replace(arg0, "/", File.separator);
else
basePath = arg0;
if(!basePath.endsWith(File.separator))
basePath += File.separator;
File f = new File(basePath);
if(!f.exists())
f.mkdirs();
}
}
/**
* �������ͺͱ������ȡ�ı�����
* @param type
* @param id
* @return
*/
public static String getTextContent(int type, long id){
String path = getFilePath(type, id);
BufferedReader br = null;
StringBuffer text = new StringBuffer();
try{
String line_sep = System.getProperty("line.separator");
if(line_sep==null)
line_sep = "\r\n";
br = new BufferedReader(new FileReader(path));
do{
String line = br.readLine();
if(line == null)
break;
text.append(line);
text.append(line_sep);
}while(true);
return text.toString();
}catch(FileNotFoundException e){
}catch(IOException e){
log.error("Exception occur when reading " + path, e);
}finally{
if(br!=null){
try{
br.close();
}catch(IOException e){}
}
text = null;
}
return null;
}
/**
* ���»����ı�������
* @param type
* @param id
* @param text
*/
public static void updateTextContent(int type, long id, String text){
if(text==null)
return;
String path = getFilePath(type, id);
FileOutputStream fos = null;
try{
File f = new File(path);
if(!f.getParentFile().exists())
f.getParentFile().mkdirs();
fos = new FileOutputStream(f);
fos.write(text.getBytes());
}catch(IOException e){
log.error("Exception occur when writing to " + path, e);
}finally{
if(fos!=null){
try{
fos.close();
}catch(Exception e){}
}
}
}
/**
* ɾ��һ�������ı�
* @param type
* @param id
* @return
*/
public static boolean deleteTextContent(int type, long id){
String path = getFilePath(type, id);
return new File(path).delete();
}
/**
* ���ر�Ŷ�Ӧ���ļ�·��
* @param type
* @param id
* @return
*/
protected static String getFilePath(int type, long id){
StringBuffer sb = new StringBuffer(basePath);
sb.append(type);
sb.append(File.separator);
sb.append(id/10000);
sb.append(File.separator);
sb.append(id);
sb.append(".htm");
return sb.toString();
}
}