def test_transfer_coll(self):
# TODO: check
cursor = pg.conn.cursor()
# reset CM in the database
cursor.execute(query["table_drop_purr_cm"])
cursor.execute(query["table_drop_company"])
cursor.execute(query["table_drop_employee"])
create_and_populate_company_mdb()
cm.create_table(pg, mock.coll_config)
# collection which will be transferred
collection = mock.coll_names[0]
relation = mock.rel_names[0]
coll_config = copy.deepcopy(mock.coll_config_company_employee)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
ex.transfer_coll(collection)
cursor.execute("SELECT count(*) FROM %s" % (relation))
cnt_pg = cursor.fetchone()
cnt_mongo = mongo[collection].count()
print("Postgres:", cnt_pg[0])
print("MongoDB:", cnt_mongo)
cursor.close()
del ex
assert cnt_mongo == cnt_pg[0]
def test_update_coll_map_changed(self):
# collection map is changed and
# extractor.coll_map_cur needs to be updated
# purr_collection_map needs old values
cursor = pg.conn.cursor()
cursor.execute(query["table_drop_purr_cm"])
# create table for CM in the database
cm.create_table(pg, mock.coll_config)
coll_config = copy.deepcopy(mock.coll_config_company_employee)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
# this pulls the map from the db (mock.coll_config)
ex.update_coll_map()
print("NEW", ex.coll_map_cur)
print("MOCK", mock.coll_config_db_company_employee)
# case 2: collection map is changed and
# extractor.coll_map_cur needs to be updated
cursor.close()
res = (ex.coll_map_cur == mock.coll_config_db)
del ex
assert res
def test_transfer(self):
# drop/truncate table
# create schema
# transfers collections
cursor = pg.conn.cursor()
# reset CM in the database
cursor.execute(query["table_drop_purr_cm"])
cursor.execute(query["table_drop_company"])
cursor.execute(query["table_drop_employee"])
create_and_populate_company_mdb()
cm.create_table(pg, mock.coll_config)
# collection which will be transferred
collection_names = mock.coll_names
coll_config = copy.deepcopy(mock.coll_config_company_employee)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
ex.transfer(collection_names)
for i in range(len(mock.rel_names)):
relation = mock.rel_names[i]
cursor.execute("SELECT count(*) FROM %s" % (relation))
cnt_pg = cursor.fetchone()
cnt_mongo = mongo[collection_names[i]].count()
if cnt_mongo != cnt_pg[0]:
print("Postgres:", cnt_pg[0])
print("MongoDB:", cnt_mongo)
assert False
cursor.close()
del ex
assert True
def test_update_multiple(self):
# no unset
# TODO: test when there is value in unset
cursor = pg.conn.cursor()
# reset CM in the database
cursor.execute(query["table_drop_purr_cm"])
cursor.execute(query["table_drop_company"])
create_and_populate_company_mdb()
cm.create_table(pg, mock.coll_config)
coll = mock.coll_names[0]
rel = mock.rel_names[0]
docs = []
mock_updated = mock.data_mdb_company_updated
for doc in mongo[coll].find():
docs.append({
"_id": doc["_id"],
"active": mock_updated["active"],
"signupCode": mock_updated["signupCode"],
"domains": mock_updated["domains"]
})
coll_config = copy.deepcopy(mock.coll_config_company_employee)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
schema = mock.setup_pg["schema_name"]
r = relation.Relation(pg, schema, rel, True)
attrs = mock.attrs_company
types = mock.types_company
r.create(attrs, types)
ex.update_multiple(docs, r, coll)
cmd = "SELECT %s FROM %s order by id" % (", ".join(attrs[1:]), rel)
cursor.execute(cmd)
mocked = mock.data_pg_company_updated_no_id
res = cursor.fetchall()
print("MOCKED")
print(mocked)
print("RESULT")
print(res)
cursor.close()
del r
del ex
assert mocked == res
def create_and_populate_company_pg():
cursor = pg.conn.cursor()
cursor.execute(query["table_drop_purr_cm"])
# create table for CM in the database
cm.create_table(pg, mock.coll_config)
cursor.execute(query["table_drop_company"])
cursor.execute(query["table_create_company"])
cursor.execute("""insert into company(
id, active, domains, signup_code
) values(
'12345', 'true',
'{"domain": ["pelotonland.com"]}',
'xfLfdsFD3S')""")
cursor.close()
def test_table_untrack(self):
# TODO:
# - check if the table is left in the PG database
# - try to insert new data to mongodb and check
# if its left out from the data transfer
# this one should remove employee from the collection map
create_and_populate_company_mdb()
create_and_populate_employee_mdb()
cursor = pg.conn.cursor()
cursor.execute(query["table_drop_company"])
cursor.execute(query["table_drop_employee"])
cursor.execute(query["table_drop_purr_cm"])
# create table for CM in the database
cm.create_table(pg, mock.coll_config)
coll_config = copy.deepcopy(mock.coll_config_company_employee)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
# # changes extractor's collection definition for every collection
# # and transfers
coll_map_old = copy.deepcopy(mock.coll_config_db_company_employee)
coll_map_new = copy.deepcopy(mock.coll_config_db)
ex.table_untrack(coll_map_old, coll_map_new)
mocked = copy.deepcopy(mock.coll_config)
if (len(ex.coll_def) != len(mocked)):
print("NEW", ex.coll_def)
print("OlD", mocked)
assert False
for k, v in ex.coll_def.items():
if v != mocked[k]:
print(k)
print(v[":columns"])
print(mocked[k][":columns"])
if v[":columns"] != mocked[k][":columns"]:
assert False
cursor.close()
del ex
assert True
def test_table_track(self):
# TODO: see if the table is transfered to the PG database
create_and_populate_company_mdb()
create_and_populate_employee_mdb()
cursor = pg.conn.cursor()
cursor.execute(query["table_drop_company"])
cursor.execute(query["table_drop_employee"])
cursor.execute(query["table_drop_purr_cm"])
coll_config = copy.deepcopy(mock.coll_config)
# create table for CM in the database
cm.create_table(pg, mock.coll_config)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
# # changes extractor's collection definition for every collection
# # and transfers
coll_map_old = mock.coll_config_db
coll_map_new = mock.coll_config_db_company_employee
ex.table_track(coll_map_old, coll_map_new)
mocked = mock.coll_config_company_employee
if (len(ex.coll_def) != len(mocked)):
assert False
for k, v in ex.coll_def.items():
if v != mocked[k]:
print(k)
print(v[":columns"])
print(mocked[k][":columns"])
if v[":columns"] != mocked[k][":columns"]:
assert False
cursor.execute(query["table_drop_purr_cm"])
cursor.close()
del ex
assert True
def test_update_coll_map_unchanged(self):
# collection map is not changed
# extractor.coll_map_cur stays the same
cursor = pg.conn.cursor()
cursor.execute(query["table_drop_purr_cm"])
# create table for CM in the database
cm.create_table(pg, mock.coll_config)
coll_config = copy.deepcopy(mock.coll_config)
ex = extractor.Extractor(pg, mongo, mock.setup_pg, mock.settings,
coll_config)
ex.update_coll_map()
print("OLD", ex.coll_map_cur)
print("NEW", mock.coll_config_db)
cursor.close()
res = (ex.coll_map_cur == mock.coll_config_db)
del ex
assert res
def start(settings, coll_map):
"""
Starts Purr.
Returns
-------
-
Parameters
----------
settings : dict
: basic settings for both PG and MongoDB
(connection strings, schema name)
coll_map : dict
: config file for collections
TODO
----
- create table with attributes and types
"""
logger.info("Starting Purr v%s ..." % get_version(), CURR_FILE)
logger.info("PID=%s" % os.getpid())
mode_tailing = False
if settings["tailing"] or settings["tailing_from"] or settings[
"tailing_from"]:
mode_tailing = True
logger.info("TAILING=%s" % ("ON" if mode_tailing else "OFF"))
setup_pg = settings["postgres"]
setup_mdb = settings["mongo"]
pg = postgres.PgConnection(setup_pg["connection"])
mongo = mongodb.MongoConnection(setup_mdb)
cm.create_table(pg, coll_map, setup_pg["schema_name"])
transfer_info.save_logs_to_db(pg, setup_pg["schema_name"])
ex = extractor.Extractor(pg, mongo.conn, setup_pg, settings, coll_map)
start_date_time = datetime.utcnow()
if mode_tailing:
try:
# first just transfer the data
tailing_start = False
thr_transfer = transfer.TransferThread(settings, coll_map, pg,
mongo, ex, tailing_start)
thr_transfer.start()
# wait until thread is finished
thr_transfer.join()
handle_coll_map_changes(settings, coll_map, pg, mongo, ex,
start_date_time)
except (KeyboardInterrupt, SystemExit):
logger.error('Stopping transfer.', CURR_FILE)
for t in THREADS:
t.stop()
raise SystemExit()
except Exception as ex:
logger.error("Unable to start transfer thread. Details: %s" % ex,
CURR_FILE)
raise SystemExit()
else:
transfer.start(ex, coll_map)