def _write_to_row(self, row1=None, row2=None, row3=None, row4=None):
timestamp1 = datetime.datetime.utcnow().replace(tzinfo=UTC)
timestamp1_micros = _microseconds_from_datetime(timestamp1)
# Truncate to millisecond granularity.
timestamp1_micros -= (timestamp1_micros % 1000)
timestamp1 = _datetime_from_microseconds(timestamp1_micros)
# 1000 microseconds is a millisecond
timestamp2 = timestamp1 + datetime.timedelta(microseconds=1000)
timestamp3 = timestamp1 + datetime.timedelta(microseconds=2000)
timestamp4 = timestamp1 + datetime.timedelta(microseconds=3000)
if row1 is not None:
row1.set_cell(COLUMN_FAMILY_ID1, COL_NAME1, CELL_VAL1,
timestamp=timestamp1)
if row2 is not None:
row2.set_cell(COLUMN_FAMILY_ID1, COL_NAME1, CELL_VAL2,
timestamp=timestamp2)
if row3 is not None:
row3.set_cell(COLUMN_FAMILY_ID1, COL_NAME2, CELL_VAL3,
timestamp=timestamp3)
if row4 is not None:
row4.set_cell(COLUMN_FAMILY_ID2, COL_NAME3, CELL_VAL4,
timestamp=timestamp4)
# Create the cells we will check.
cell1 = Cell(CELL_VAL1, timestamp1)
cell2 = Cell(CELL_VAL2, timestamp2)
cell3 = Cell(CELL_VAL3, timestamp3)
cell4 = Cell(CELL_VAL4, timestamp4)
return cell1, cell2, cell3, cell4
