def _get_instance(spanner_client: client.Client) -> instance.Instance:
"""Returns a spanner instance from the client.
First, checks if there is an existing instance that can be re-used, returning
it if one exists. Otherwise, create a new instance, waits for it to be created
and then returns it.
Args:
spanner_client: An initialized spanner client.
"""
existing_instances = list(spanner_client.list_instances())
if existing_instances:
return existing_instances[0]
# The emulator has one default config.
config = list(spanner_client.list_instance_configs())[0]
inst = spanner_client.instance('spanner-instance-name',
configuration_name=config.name)
inst.create().result()
return inst
def _get_client(self, project_id: str) -> Client:
"""
Provides a client for interacting with the Cloud Spanner API.
:param project_id: The ID of the GCP project.
:type project_id: str
:return: Client
:rtype: google.cloud.spanner_v1.client.Client
"""
if not self._client:
self._client = Client(project=project_id, credentials=self._get_credentials())
return self._client
def _get_client(self, project_id):
"""
Provides a client for interacting with the Cloud Spanner API.
:param project_id: The ID of the GCP project.
:type project_id: str
:return: Client for interacting with the Cloud Spanner API. See:
https://googleapis.github.io/google-cloud-python/latest/spanner/client-api.html#google.cloud.spanner_v1.client.Client
:rtype: object
"""
if not self._client:
self._client = Client(project=project_id, credentials=self._get_credentials())
return self._client
def get_client(self, project_id):
# type: (str) -> Client
"""
Provides a client for interacting with Cloud Spanner API.
:param project_id: The ID of the project which owns the instances, tables and data.
:type project_id: str
:return: Client for interacting with Cloud Spanner API. See:
https://googleapis.github.io/google-cloud-python/latest/spanner/client-api.html#google.cloud.spanner_v1.client.Client
:rtype: object
"""
if not self._client:
self._client = Client(project=project_id,
credentials=self._get_credentials())
return self._client
