ChannelBuffer function ( ) { return pingHeader . duplicate ( ) ; }
a ping header is same as regular header , just with -1 for the size of the message . concode_field_sep ChannelBuffer pingHeader concode_elem_sep int MARKER_BYTES_SIZE concode_elem_sep int VERSION_ID_SIZE concode_elem_sep int REQUEST_ID_SIZE concode_elem_sep int HEADER_SIZE concode_elem_sep int PING_DATA_SIZE concode_elem_sep int MESSAGE_LENGTH_SIZE concode_elem_sep int STATUS_SIZE concode_field_sep void writeHeader