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feat: autocommit sample (#172)
* feat: autocommit sample

* remove unused imports

* Remove samples/samples init

* No package-relative imports in samples

* fix check errors, rename test file

* move ResultsChecksum() to test

* use connection.Cursor in patch

* Apply suggestions from code review

Co-authored-by: Chris Kleinknecht <libc@google.com>

* Update samples/samples/autocommit_test.py

Co-authored-by: Chris Kleinknecht <libc@google.com>

* lint fix

Co-authored-by: Chris Kleinknecht <libc@google.com>
Co-authored-by: Alex <7764119+AVaksman@users.noreply.github.com>
Co-authored-by: Ilya Gurov <ilya.faer@mail.ru>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>
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5 people committed Dec 30, 2020
1 parent 9b8d472 commit 4ef793c9cd5d6dec6e92faf159665e11d63762ad
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  1. +64 −0 samples/samples/autocommit.py
  2. +62 −0 samples/samples/autocommit_test.py
@@ -0,0 +1,64 @@
# Copyright 2020 Google LLC
#
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file or at
# https://developers.google.com/open-source/licenses/bsd

import argparse

from google.cloud.spanner_dbapi import connect


def enable_autocommit_mode(instance_id, database_id):
"""Enables autocommit mode."""
# [START spanner_enable_autocommit_mode]

connection = connect(instance_id, database_id)
connection.autocommit = True
print("Autocommit mode is enabled.")

cursor = connection.cursor()

cursor.execute(
"""CREATE TABLE Singers (
SingerId INT64 NOT NULL,
FirstName STRING(1024),
LastName STRING(1024),
SingerInfo BYTES(MAX)
) PRIMARY KEY (SingerId)"""
)

cursor.execute(
"""INSERT INTO Singers (SingerId, FirstName, LastName) VALUES
(12, 'Melissa', 'Garcia'),
(13, 'Russell', 'Morales'),
(14, 'Jacqueline', 'Long'),
(15, 'Dylan', 'Shaw')"""
)

cursor.execute("""SELECT * FROM Singers WHERE SingerId = 13""")

print("SingerId: {}, AlbumId: {}, AlbumTitle: {}".format(*cursor.fetchone()))

connection.close()
# [END spanner_enable_autocommit_mode]


if __name__ == "__main__":
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter,
)
parser.add_argument("instance_id", help="Your Cloud Spanner instance ID.")
parser.add_argument(
"--database-id",
help="Your Cloud Spanner database ID.",
default="example_db",
)
subparsers = parser.add_subparsers(dest="command")
subparsers.add_parser("enable_autocommit_mode", help=enable_autocommit_mode.__doc__)
args = parser.parse_args()
if args.command == "enable_autocommit_mode":
enable_autocommit_mode(args.instance_id, args.database_id)
else:
print(f"Command {args.command} did not match expected commands.")
@@ -0,0 +1,62 @@
# Copyright 2020 Google LLC
#
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file or at
# https://developers.google.com/open-source/licenses/bsd

import uuid

from google.cloud import spanner
from google.cloud.spanner_dbapi import connect
import mock
import pytest

import autocommit


def unique_instance_id():
"""Creates a unique id for the database."""
return f"test-instance-{uuid.uuid4().hex[:10]}"


def unique_database_id():
"""Creates a unique id for the database."""
return f"test-db-{uuid.uuid4().hex[:10]}"


INSTANCE_ID = unique_instance_id()
DATABASE_ID = unique_database_id()


@pytest.fixture(scope="module")
def spanner_instance():
spanner_client = spanner.Client()
config_name = f"{spanner_client.project_name}/instanceConfigs/regional-us-central1"

instance = spanner_client.instance(INSTANCE_ID, config_name)
op = instance.create()
op.result(120) # block until completion
yield instance
instance.delete()


@pytest.fixture(scope="module")
def database(spanner_instance):
"""Creates a temporary database that is removed after testing."""
db = spanner_instance.database(DATABASE_ID)
db.create()
yield db
db.drop()


def test_enable_autocommit_mode(capsys, database):
connection = connect(INSTANCE_ID, DATABASE_ID)
cursor = connection.cursor()

with mock.patch(
"google.cloud.spanner_dbapi.connection.Cursor", return_value=cursor,
):
autocommit.enable_autocommit_mode(INSTANCE_ID, DATABASE_ID)
out, _ = capsys.readouterr()
assert "Autocommit mode is enabled." in out
assert "SingerId: 13, AlbumId: Russell, AlbumTitle: Morales" in out

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