def _reset_streaming_status(self, postgres_status, streaming_status):
"""
Reset the status of receive-wal by removing the .partial file that
is marking the current position and creating one that is current with
the PostgreSQL insert location
"""
current_wal = xlog.location_to_xlogfile_name_offset(
postgres_status["current_lsn"],
streaming_status["timeline"],
postgres_status["xlog_segment_size"],
)["file_name"]
restart_wal = current_wal
if (postgres_status["replication_slot"]
and postgres_status["replication_slot"].restart_lsn):
restart_wal = xlog.location_to_xlogfile_name_offset(
postgres_status["replication_slot"].restart_lsn,
streaming_status["timeline"],
postgres_status["xlog_segment_size"],
)["file_name"]
restart_path = os.path.join(self.config.streaming_wals_directory,
restart_wal)
restart_partial_path = restart_path + ".partial"
wal_files = sorted(glob(
os.path.join(self.config.streaming_wals_directory, "*")),
reverse=True)
# Pick the newer file
last = None
for last in wal_files:
if xlog.is_wal_file(last) or xlog.is_partial_file(last):
break
# Check if the status is already up-to-date
if not last or last == restart_partial_path or last == restart_path:
output.info("Nothing to do. Position of receive-wal is aligned.")
return
if os.path.basename(last) > current_wal:
output.error(
"The receive-wal position is ahead of PostgreSQL "
"current WAL lsn (%s > %s)",
os.path.basename(last),
postgres_status["current_xlog"],
)
return
output.info("Resetting receive-wal directory status")
if xlog.is_partial_file(last):
output.info("Removing status file %s" % last)
os.unlink(last)
output.info("Creating status file %s" % restart_partial_path)
open(restart_partial_path, "w").close()
def test_location_to_xlogfile_name_offset(self):
result = xlog.location_to_xlogfile_name_offset(
'A/12345678', 3, xlog.DEFAULT_XLOG_SEG_SIZE)
assert result == {
'file_name': '000000030000000A00000012',
'file_offset': 0x345678
}
def test_location_to_xlogfile_name_offset(self, size, name, offset, lsn):
result = xlog.location_to_xlogfile_name_offset(
lsn, 3, 1 << size)
assert result == {
'file_name': name,
'file_offset': offset,
}
def test_location_to_xlogfile_name_offset(self):
assert xlog.location_to_xlogfile_name_offset('A/12345678', 3) == {
'file_name': '000000030000000A00000012',
'file_offset': 0x345678
}
def test_location_to_xlogfile_name_offset(self):
assert xlog.location_to_xlogfile_name_offset('A/12345678', 3) == {
'file_name': '000000030000000A00000012',
'file_offset': 0x345678
}
