/*
* 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.meidusa.amoeba.util;
import java.util.HashMap;
import java.util.Map;
import org.apache.log4j.Logger;
/**
* ThreadLocal Context
* @author <a href=mailto:piratebase@sina.com>Struct chen</a>
* @version $Id: ThreadLocalContext.java 3597 2006-11-23 08:11:58Z struct $
*/
public class ThreadLocalMap{
private static Logger logger = Logger.getLogger(ThreadLocalMap.class);
protected final static ThreadLocal<Map<Object,Object>> threadContext = new MapThreadLocal();
private ThreadLocalMap(){};
public static void put(Object key,Object value){
getContextMap().put(key,value);
}
public static Object remove(Object key){
return getContextMap().remove(key);
}
public static Object get(Object key){
return getContextMap().get(key);
}
public static boolean containsKey(Object key){
return getContextMap().containsKey(key);
}
private static class MapThreadLocal extends ThreadLocal<Map<Object,Object>> {
protected Map<Object,Object> initialValue() {
return new HashMap<Object,Object>() {
private static final long serialVersionUID = 3637958959138295593L;
public Object put(Object key, Object value) {
if (logger.isDebugEnabled()) {
if (containsKey(key)) {
logger.debug("Overwritten attribute to thread context: " + key
+ " = " + value);
} else {
logger.debug("Added attribute to thread context: " + key + " = "
+ value);
}
}
return super.put(key, value);
}
};
}
}
/**
* ȡ��thread context Map��ʵ����
*
* @return thread context Map��ʵ��
*/
protected static Map<Object,Object> getContextMap() {
return (Map<Object,Object>) threadContext.get();
}
/**
* �����߳����б�holdס�Ķ����Ա����ã�
*/
public static void reset(){
getContextMap().clear();
}
}