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# Copyright 2015-present MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utilities for testing Server Selection and Max Staleness."""
from __future__ import annotations
import datetime
import os
import sys
sys.path[0:0] = [""]
from pymongo.common import MIN_SUPPORTED_WIRE_VERSION, clean_node
from pymongo.hello import Hello, HelloCompat
from pymongo.server_description import ServerDescription
def get_addresses(server_list):
seeds = []
hosts = []
for server in server_list:
seeds.append(clean_node(server["address"]))
hosts.append(server["address"])
return seeds, hosts
def make_last_write_date(server):
epoch = datetime.datetime.fromtimestamp(0, tz=datetime.timezone.utc).replace(tzinfo=None)
millis = server.get("lastWrite", {}).get("lastWriteDate")
if millis:
diff = ((millis % 1000) + 1000) % 1000
seconds = (millis - diff) / 1000
micros = diff * 1000
return epoch + datetime.timedelta(seconds=seconds, microseconds=micros)
else:
# "Unknown" server.
return epoch
def make_server_description(server, hosts):
"""Make a ServerDescription from server info in a JSON test."""
server_type = server["type"]
if server_type in ("Unknown", "PossiblePrimary"):
return ServerDescription(clean_node(server["address"]), Hello({}))
hello_response = {"ok": True, "hosts": hosts}
if server_type not in ("Standalone", "Mongos", "RSGhost"):
hello_response["setName"] = "rs"
if server_type == "RSPrimary":
hello_response[HelloCompat.LEGACY_CMD] = True
elif server_type == "RSSecondary":
hello_response["secondary"] = True
elif server_type == "Mongos":
hello_response["msg"] = "isdbgrid"
elif server_type == "RSGhost":
hello_response["isreplicaset"] = True
elif server_type == "RSArbiter":
hello_response["arbiterOnly"] = True
hello_response["lastWrite"] = {"lastWriteDate": make_last_write_date(server)}
for field in "maxWireVersion", "tags", "idleWritePeriodMillis":
if field in server:
hello_response[field] = server[field]
hello_response.setdefault("maxWireVersion", MIN_SUPPORTED_WIRE_VERSION)
# Sets _last_update_time to now.
sd = ServerDescription(
clean_node(server["address"]),
Hello(hello_response),
round_trip_time=server["avg_rtt_ms"] / 1000.0,
)
if "lastUpdateTime" in server:
sd._last_update_time = server["lastUpdateTime"] / 1000.0 # ms to sec.
return sd
def get_topology_type_name(scenario_def):
td = scenario_def["topology_description"]
name = td["type"]
if name == "Unknown":
# PyMongo never starts a topology in type Unknown.
return "Sharded" if len(td["servers"]) > 1 else "Single"
else:
return name
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