* Fix#330 : fix listMetricFiles() returns wrong file name list.
Signed-off-by: Carpenter Lee <hooleeucas@163.com>
* Add timestamp check when read metrics.
Signed-off-by: Carpenter Lee <hooleeucas@163.com>
* Refine test case
Signed-off-by: Carpenter Lee <hooleeucas@163.com>