@Override
            public void run() {
                for (Scannable scanned : scanList) {
                    try {
                        scanned.scan();
                    } catch (Throwable t) {
                        logger.error("Exception caught when scannings.", t);
                    }
                }
            }
Scanner is used to do scan task.

@author jiangping
@version $Id: RpcTaskScanner.java, v 0.1 Mar 4, 2016 3:30:52 PM tao Exp $
src/main/java/com/alipay/remoting/rpc/RpcTaskScanner.java