public class SimpleCacheWrapper {
protected final Logger logger = MyLoggerFactory.getLogger(this.getClass());
public static final int DEFAULT_EXPIRE_TIME = 60 * 30; // a half hour
private Cache cache;
public SimpleCacheWrapper(Cache cache) {
super();
this.cache = cache;
}
public boolean canCache() {
return this.cache != null;
}
@SuppressWarnings("unchecked")
public <T> T get(String key) {
if (!canCache()) return null;
ValueWrapper value = cache.get(key);
if (value == null) return null;
CacheElement ce = (CacheElement) value.get();
if (!ce.isIndate()) {
logger.info("clear cache by key: " + ce);
return null;
}
if (logger.isInfoEnabled()) {
logger.info("get from cache by key: " + ce);
}
return (T) ce.getValue();
}
public void put(String key, Object value) {
put(key, value, DEFAULT_EXPIRE_TIME);
}
public void put(String key, Object value, int expire) {
if (!canCache() || value == null) return;
CacheElement ce = CacheElement.create(key, value, expire);
cache.put(key, ce);
if (logger.isInfoEnabled()) {
logger.info("put into cache: " + ce);
}
}
}
public class WebFilterAdapter implements WebFilterInitializers, WebFilter {
protected final Logger logger = MyLoggerFactory.getLogger(this.getClass());
@Override
public void onInit(FilterConfig config) {}
/*@Override
public void onThrowable(HttpServletRequest request, HttpServletResponse response, Throwable ex) throws IOException, ServletException {
if(ex instanceof ServletException)
throw (ServletException)ex;
else if(ex instanceof IOException)
throw (IOException)ex;
throw new ServletException("error: " + ex.getMessage(), ex);
}*/
@Override
public void onFilter(HttpServletRequest request, HttpServletResponse response) {}
@Override
public void onFinally(HttpServletRequest request, HttpServletResponse response) {}
}