docs: add scheduled query samples (#83)

* docs: add scheduled query samples

* test: opt-out of type annotations for now

* test: use environment variable for project ID

* set quota project

* consolidate config creation to conserve quota

packages/google-cloud-bigquery-datatransfer/samples/snippets/conftest.py

@@ -12,34 +12,93 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import datetime
+import os
+import uuid
+
+from google.api_core import client_options
 import google.api_core.exceptions
 import google.auth
 from google.cloud import bigquery
 from google.cloud import bigquery_datatransfer
 import pytest
 
 
+def temp_suffix():
+    now = datetime.datetime.now()
+    return f"{now.strftime('%Y%m%d%H%M%S')}_{uuid.uuid4().hex[:8]}"
+
+
+@pytest.fixture(scope="session")
+def bigquery_client(default_credentials):
+    credentials, project_id = default_credentials
+    return bigquery.Client(credentials=credentials, project=project_id)
+
+
+@pytest.fixture(scope="session")
+def dataset_id(bigquery_client, project_id):
+    dataset_id = f"bqdts_{temp_suffix()}"
+    bigquery_client.create_dataset(f"{project_id}.{dataset_id}")
+    yield dataset_id
+    bigquery_client.delete_dataset(dataset_id, delete_contents=True)
+
+
 @pytest.fixture(scope="session")
 def default_credentials():
     return google.auth.default(["https://www.googleapis.com/auth/cloud-platform"])
 
 
 @pytest.fixture(scope="session")
-def project_id(default_credentials):
-    _, project_id = default_credentials
-    return project_id
+def project_id():
+    return os.environ["GOOGLE_CLOUD_PROJECT"]
 
 
 @pytest.fixture(scope="session")
-def bigquery_client(default_credentials):
-    credentials, project_id = default_credentials
-    return bigquery.Client(credentials=credentials, project=project_id)
+def service_account_name(default_credentials):
+    credentials, _ = default_credentials
+    # Note: this property is not available when running with user account
+    # credentials, but only service account credentials are used in our test
+    # infrastructure.
+    return credentials.service_account_email
 
 
 @pytest.fixture(scope="session")
-def transfer_client(default_credentials):
+def transfer_client(default_credentials, project_id):
     credentials, _ = default_credentials
-    return bigquery_datatransfer.DataTransferServiceClient(credentials=credentials)
+    options = client_options.ClientOptions(quota_project_id=project_id)
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient(
+        credentials=credentials, client_options=options
+    )
+
+    # Ensure quota is always attributed to the correct project.
+    bigquery_datatransfer.DataTransferServiceClient = lambda: transfer_client
+
+    return transfer_client
+
+
+@pytest.fixture(scope="session")
+def transfer_config_name(transfer_client, project_id, dataset_id, service_account_name):
+    from . import manage_transfer_configs, scheduled_query
+
+    # Use the transfer_client fixture so we know quota is attributed to the
+    # correct project.
+    assert transfer_client is not None
+
+    # To conserve limited BQ-DTS quota, this fixture creates only one transfer
+    # config for a whole session and is used to test the scheduled_query.py and
+    # the delete operation in manage_transfer_configs.py.
+    transfer_config = scheduled_query.create_scheduled_query(
+        {
+            "project_id": project_id,
+            "dataset_id": dataset_id,
+            "service_account_name": service_account_name,
+        }
+    )
+    yield transfer_config.name
+    manage_transfer_configs.delete_config(
+        {"transfer_config_name": transfer_config.name}
+    )
 
 
 @pytest.fixture

packages/google-cloud-bigquery-datatransfer/samples/snippets/copy_dataset_test.py

@@ -42,8 +42,17 @@ def source_dataset_id(bigquery_client, project_id):
 
 
 def test_copy_dataset(
-    capsys, project_id, destination_dataset_id, source_dataset_id, to_delete_configs
+    capsys,
+    transfer_client,
+    project_id,
+    destination_dataset_id,
+    source_dataset_id,
+    to_delete_configs,
 ):
+    # Use the transfer_client fixture so we know quota is attributed to the
+    # correct project.
+    assert transfer_client is not None
+
     transfer_config = copy_dataset.copy_dataset(
         {
             "destination_project_id": project_id,

packages/google-cloud-bigquery-datatransfer/samples/snippets/manage_transfer_configs.py

@@ -0,0 +1,171 @@
+# Copyright 2020 Google LLC
+#
+# 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.
+
+
+def list_configs(override_values={}):
+    # [START bigquerydatatransfer_list_configs]
+    from google.cloud import bigquery_datatransfer
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient()
+
+    project_id = "my-project"
+    # [END bigquerydatatransfer_list_configs]
+    # To facilitate testing, we replace values with alternatives
+    # provided by the testing harness.
+    project_id = override_values.get("project_id", project_id)
+    # [START bigquerydatatransfer_list_configs]
+    parent = transfer_client.common_project_path(project_id)
+
+    configs = transfer_client.list_transfer_configs(parent=parent)
+    print("Got the following configs:")
+    for config in configs:
+        print(f"\tID: {config.name}, Schedule: {config.schedule}")
+    # [END bigquerydatatransfer_list_configs]
+
+
+def update_config(override_values={}):
+    # [START bigquerydatatransfer_update_config]
+    from google.cloud import bigquery_datatransfer
+    from google.protobuf import field_mask_pb2
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient()
+
+    transfer_config_name = "projects/1234/locations/us/transferConfigs/abcd"
+    new_display_name = "My Transfer Config"
+    # [END bigquerydatatransfer_update_config]
+    # To facilitate testing, we replace values with alternatives
+    # provided by the testing harness.
+    new_display_name = override_values.get("new_display_name", new_display_name)
+    transfer_config_name = override_values.get(
+        "transfer_config_name", transfer_config_name
+    )
+    # [START bigquerydatatransfer_update_config]
+
+    transfer_config = bigquery_datatransfer.TransferConfig(name=transfer_config_name)
+    transfer_config.display_name = new_display_name
+
+    transfer_config = transfer_client.update_transfer_config(
+        {
+            "transfer_config": transfer_config,
+            "update_mask": field_mask_pb2.FieldMask(paths=["display_name"]),
+        }
+    )
+
+    print(f"Updated config: '{transfer_config.name}'")
+    print(f"New display name: '{transfer_config.display_name}'")
+    # [END bigquerydatatransfer_update_config]
+    # Return the config name for testing purposes, so that it can be deleted.
+    return transfer_config
+
+
+def update_credentials_with_service_account(override_values={}):
+    # [START bigquerydatatransfer_update_credentials]
+    from google.cloud import bigquery_datatransfer
+    from google.protobuf import field_mask_pb2
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient()
+
+    service_account_name = "[email protected]"
+    transfer_config_name = "projects/1234/locations/us/transferConfigs/abcd"
+    # [END bigquerydatatransfer_update_credentials]
+    # To facilitate testing, we replace values with alternatives
+    # provided by the testing harness.
+    service_account_name = override_values.get(
+        "service_account_name", service_account_name
+    )
+    transfer_config_name = override_values.get(
+        "transfer_config_name", transfer_config_name
+    )
+    # [START bigquerydatatransfer_update_credentials]
+
+    transfer_config = bigquery_datatransfer.TransferConfig(name=transfer_config_name)
+
+    transfer_config = transfer_client.update_transfer_config(
+        {
+            "transfer_config": transfer_config,
+            "update_mask": field_mask_pb2.FieldMask(paths=["service_account_name"]),
+            "service_account_name": service_account_name,
+        }
+    )
+
+    print("Updated config: '{}'".format(transfer_config.name))
+    # [END bigquerydatatransfer_update_credentials]
+    # Return the config name for testing purposes, so that it can be deleted.
+    return transfer_config
+
+
+def schedule_backfill(override_values={}):
+    # [START bigquerydatatransfer_schedule_backfill]
+    import datetime
+
+    from google.cloud import bigquery_datatransfer
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient()
+
+    transfer_config_name = "projects/1234/locations/us/transferConfigs/abcd"
+    # [END bigquerydatatransfer_schedule_backfill]
+    # To facilitate testing, we replace values with alternatives
+    # provided by the testing harness.
+    transfer_config_name = override_values.get(
+        "transfer_config_name", transfer_config_name
+    )
+    # [START bigquerydatatransfer_schedule_backfill]
+    now = datetime.datetime.now(datetime.timezone.utc)
+    start_time = now - datetime.timedelta(days=5)
+    end_time = now - datetime.timedelta(days=2)
+
+    # Some data sources, such as scheduled_query only support daily run.
+    # Truncate start_time and end_time to midnight time (00:00AM UTC).
+    start_time = datetime.datetime(
+        start_time.year, start_time.month, start_time.day, tzinfo=datetime.timezone.utc
+    )
+    end_time = datetime.datetime(
+        end_time.year, end_time.month, end_time.day, tzinfo=datetime.timezone.utc
+    )
+
+    response = transfer_client.schedule_transfer_runs(
+        parent=transfer_config_name,
+        start_time=start_time,
+        end_time=end_time,
+    )
+
+    print("Started transfer runs:")
+    for run in response.runs:
+        print(f"backfill: {run.run_time} run: {run.name}")
+    # [END bigquerydatatransfer_schedule_backfill]
+    return response.runs
+
+
+def delete_config(override_values={}):
+    # [START bigquerydatatransfer_delete_transfer]
+    import google.api_core.exceptions
+    from google.cloud import bigquery_datatransfer
+
+    transfer_client = bigquery_datatransfer.DataTransferServiceClient()
+
+    transfer_config_name = "projects/1234/locations/us/transferConfigs/abcd"
+    # [END bigquerydatatransfer_delete_transfer]
+    # To facilitate testing, we replace values with alternatives
+    # provided by the testing harness.
+    transfer_config_name = override_values.get(
+        "transfer_config_name", transfer_config_name
+    )
+    # [START bigquerydatatransfer_delete_transfer]
+    try:
+        transfer_client.delete_transfer_config(name=transfer_config_name)
+    except google.api_core.exceptions.NotFound:
+        print("Transfer config not found.")
+    else:
+        print(f"Deleted transfer config: {transfer_config_name}")
+    # [END bigquerydatatransfer_delete_transfer]

packages/google-cloud-bigquery-datatransfer/samples/snippets/manage_transfer_configs_test.py

@@ -0,0 +1,70 @@
+# Copyright 2020 Google LLC
+#
+# 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.
+
+from . import manage_transfer_configs
+
+
+def test_list_configs(capsys, project_id, transfer_config_name):
+    manage_transfer_configs.list_configs({"project_id": project_id})
+    out, _ = capsys.readouterr()
+    assert "Got the following configs:" in out
+    assert transfer_config_name in out
+
+
+def test_update_config(capsys, transfer_config_name):
+    manage_transfer_configs.update_config(
+        {
+            "new_display_name": "name from test_update_config",
+            "transfer_config_name": transfer_config_name,
+        }
+    )
+    out, _ = capsys.readouterr()
+    assert "Updated config:" in out
+    assert transfer_config_name in out
+    assert "name from test_update_config" in out
+
+
+def test_update_credentials_with_service_account(
+    capsys, project_id, service_account_name, transfer_config_name
+):
+    manage_transfer_configs.update_credentials_with_service_account(
+        {
+            "project_id": project_id,
+            "service_account_name": service_account_name,
+            "transfer_config_name": transfer_config_name,
+        }
+    )
+    out, _ = capsys.readouterr()
+    assert "Updated config:" in out
+    assert transfer_config_name in out
+
+
+def test_schedule_backfill(capsys, transfer_config_name):
+    runs = manage_transfer_configs.schedule_backfill(
+        {
+            "transfer_config_name": transfer_config_name,
+        }
+    )
+    out, _ = capsys.readouterr()
+    assert "Started transfer runs:" in out
+    # Run IDs should include the transfer name in their path.
+    assert transfer_config_name in out
+    # Check that there are runs for 5, 4, 3, and 2 days ago.
+    assert len(runs) == 4
+
+
+def test_delete_config(capsys, transfer_config_name):
+    # transfer_config_name fixture in conftest.py calls the delete config
+    # sample. To conserve limited BQ-DTS quota we only make basic checks.
+    assert len(transfer_config_name) != 0