HashMap缓存随笔

public class MyCache{
	private static final Logger log = LoggerFactory.getLogger(MyCache.class);
	
	private Map<String, Object> cacheDB;
	
	public MyCache(){
		cacheDB = new ConcurrentHashMap<String, Object>();
	}
	
	/**
	 * 设置缓存
	 */
	 public boolean set(String key, Object value){
		 if(key == null || value == null){
			 log.error("param exception, add cache faile");
			 return false;
		 }
		 try{
			 cacheDB.put(key, value);
			 return true;
		 } catch(Exception e){
			 log.error("add cache error :{}", e);
		 }
		 return faile;
	 }
	 
	/**
	 * 获取缓存
	 */
	 public Object get(String key){
		 if(key == null){
			 log.error("key must not be null");
			 return null;
		 }
		 Object value = null;
		 try{
			 value = cacheDB.get(key);
		 } cache(Exception e){
			 log.error("get value from cache error :{}", e);
		 }
		 return value;
	 }

	/**
	 * 清除缓存
	 */	
	 public boolean remove(String key){
		 if(key == null){
			 log.warn("key must not be null");
			 return false;
		 }
		 try{
			 cacheDB.remove(key);
			 return true;
		 } catch(Exception e){
			 log.error("remove cache error :{}", e);
		 }
	 }
	 
	 /**
	 * 清除所有缓存
	 */	
	 public boolean flushAll(){
		 try{
			 cacheDB.clear();
			 return true;
		 } catch(Exception e){
			 log.error("flush cache error:{}", e);
		 }
		 return false;
	 }
}