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"""Enable change stream hook.
A hook to enable change stream in the replica set and the sharded cluster in the multi-tenant
environment.
"""
from time import sleep
from pymongo import MongoClient
from buildscripts.resmokelib import config
from buildscripts.resmokelib.testing.hooks import interface
class EnableChangeStream(interface.Hook):
"""Enable change stream hook class.
Enables change stream in the multi-tenant environment for the replica set and the sharded
cluster.
"""
IS_BACKGROUND = False
def __init__(self, hook_logger, fixture):
"""Initialize the EnableChangeCollection."""
description = "Enables the change stream in the multi-tenant environment."
interface.Hook.__init__(self, hook_logger, fixture, description)
self._fixture = fixture
def before_test(self, test, test_report):
"""Enables change stream before test suite starts executing the test cases."""
if hasattr(self._fixture, "mongos"):
self.logger.info("Enabling change stream in the sharded cluster.")
self._set_change_collection_state_in_sharded_cluster()
else:
self.logger.info("Enabling change stream in the replica sets.")
self._set_change_stream_state(self._fixture, True)
self.logger.info("Successfully enabled the change stream in the fixture.")
def _set_change_collection_state_in_sharded_cluster(self):
for shard in self._fixture.shards:
EnableChangeStream._set_change_stream_state(shard, True)
# TODO SERVER-68341 Remove the sleep. Sleep for some time such that periodic-noop entries
# get written to change collections. This will ensure that the client open the change
# stream cursor with the resume token whose timestamp is later than the change collection
# first entry. Refer to the ticket for more details.
sleep(5)
@staticmethod
def _set_change_stream_state(connection, enabled):
# TODO SERVER-67267 Enable command overrides to use security token.
client = connection.get_primary().mongo_client()
client.get_database("admin").command({"setChangeStreamState": 1, "enabled": enabled})
assert client.get_database("admin").command({"getChangeStreamState": 1
})["enabled"] is enabled
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