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grpc.py
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grpc.py
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# -*- coding: utf-8 -*-
# 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.
#
import warnings
from typing import Callable, Dict, Optional, Sequence, Tuple, Union
from google.api_core import grpc_helpers # type: ignore
from google.api_core import operations_v1 # type: ignore
from google.api_core import gapic_v1 # type: ignore
import google.auth # type: ignore
from google.auth import credentials as ga_credentials # type: ignore
from google.auth.transport.grpc import SslCredentials # type: ignore
import grpc # type: ignore
from google.cloud.redis_v1beta1.types import cloud_redis
from google.longrunning import operations_pb2 # type: ignore
from .base import CloudRedisTransport, DEFAULT_CLIENT_INFO
class CloudRedisGrpcTransport(CloudRedisTransport):
"""gRPC backend transport for CloudRedis.
Configures and manages Cloud Memorystore for Redis instances
Google Cloud Memorystore for Redis v1beta1
The ``redis.googleapis.com`` service implements the Google Cloud
Memorystore for Redis API and defines the following resource model
for managing Redis instances:
- The service works with a collection of cloud projects, named:
``/projects/*``
- Each project has a collection of available locations, named:
``/locations/*``
- Each location has a collection of Redis instances, named:
``/instances/*``
- As such, Redis instances are resources of the form:
``/projects/{project_id}/locations/{location_id}/instances/{instance_id}``
Note that location_id must be referring to a GCP ``region``; for
example:
- ``projects/redpepper-1290/locations/us-central1/instances/my-redis``
This class defines the same methods as the primary client, so the
primary client can load the underlying transport implementation
and call it.
It sends protocol buffers over the wire using gRPC (which is built on
top of HTTP/2); the ``grpcio`` package must be installed.
"""
_stubs: Dict[str, Callable]
def __init__(
self,
*,
host: str = "redis.googleapis.com",
credentials: ga_credentials.Credentials = None,
credentials_file: str = None,
scopes: Sequence[str] = None,
channel: grpc.Channel = None,
api_mtls_endpoint: str = None,
client_cert_source: Callable[[], Tuple[bytes, bytes]] = None,
ssl_channel_credentials: grpc.ChannelCredentials = None,
client_cert_source_for_mtls: Callable[[], Tuple[bytes, bytes]] = None,
quota_project_id: Optional[str] = None,
client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
always_use_jwt_access: Optional[bool] = False,
) -> None:
"""Instantiate the transport.
Args:
host (Optional[str]):
The hostname to connect to.
credentials (Optional[google.auth.credentials.Credentials]): The
authorization credentials to attach to requests. These
credentials identify the application to the service; if none
are specified, the client will attempt to ascertain the
credentials from the environment.
This argument is ignored if ``channel`` is provided.
credentials_file (Optional[str]): A file with credentials that can
be loaded with :func:`google.auth.load_credentials_from_file`.
This argument is ignored if ``channel`` is provided.
scopes (Optional(Sequence[str])): A list of scopes. This argument is
ignored if ``channel`` is provided.
channel (Optional[grpc.Channel]): A ``Channel`` instance through
which to make calls.
api_mtls_endpoint (Optional[str]): Deprecated. The mutual TLS endpoint.
If provided, it overrides the ``host`` argument and tries to create
a mutual TLS channel with client SSL credentials from
``client_cert_source`` or application default SSL credentials.
client_cert_source (Optional[Callable[[], Tuple[bytes, bytes]]]):
Deprecated. A callback to provide client SSL certificate bytes and
private key bytes, both in PEM format. It is ignored if
``api_mtls_endpoint`` is None.
ssl_channel_credentials (grpc.ChannelCredentials): SSL credentials
for the grpc channel. It is ignored if ``channel`` is provided.
client_cert_source_for_mtls (Optional[Callable[[], Tuple[bytes, bytes]]]):
A callback to provide client certificate bytes and private key bytes,
both in PEM format. It is used to configure a mutual TLS channel. It is
ignored if ``channel`` or ``ssl_channel_credentials`` is provided.
quota_project_id (Optional[str]): An optional project to use for billing
and quota.
client_info (google.api_core.gapic_v1.client_info.ClientInfo):
The client info used to send a user-agent string along with
API requests. If ``None``, then default info will be used.
Generally, you only need to set this if you're developing
your own client library.
always_use_jwt_access (Optional[bool]): Whether self signed JWT should
be used for service account credentials.
Raises:
google.auth.exceptions.MutualTLSChannelError: If mutual TLS transport
creation failed for any reason.
google.api_core.exceptions.DuplicateCredentialArgs: If both ``credentials``
and ``credentials_file`` are passed.
"""
self._grpc_channel = None
self._ssl_channel_credentials = ssl_channel_credentials
self._stubs: Dict[str, Callable] = {}
self._operations_client: Optional[operations_v1.OperationsClient] = None
if api_mtls_endpoint:
warnings.warn("api_mtls_endpoint is deprecated", DeprecationWarning)
if client_cert_source:
warnings.warn("client_cert_source is deprecated", DeprecationWarning)
if channel:
# Ignore credentials if a channel was passed.
credentials = False
# If a channel was explicitly provided, set it.
self._grpc_channel = channel
self._ssl_channel_credentials = None
else:
if api_mtls_endpoint:
host = api_mtls_endpoint
# Create SSL credentials with client_cert_source or application
# default SSL credentials.
if client_cert_source:
cert, key = client_cert_source()
self._ssl_channel_credentials = grpc.ssl_channel_credentials(
certificate_chain=cert, private_key=key
)
else:
self._ssl_channel_credentials = SslCredentials().ssl_credentials
else:
if client_cert_source_for_mtls and not ssl_channel_credentials:
cert, key = client_cert_source_for_mtls()
self._ssl_channel_credentials = grpc.ssl_channel_credentials(
certificate_chain=cert, private_key=key
)
# The base transport sets the host, credentials and scopes
super().__init__(
host=host,
credentials=credentials,
credentials_file=credentials_file,
scopes=scopes,
quota_project_id=quota_project_id,
client_info=client_info,
always_use_jwt_access=always_use_jwt_access,
)
if not self._grpc_channel:
self._grpc_channel = type(self).create_channel(
self._host,
credentials=self._credentials,
credentials_file=credentials_file,
scopes=self._scopes,
ssl_credentials=self._ssl_channel_credentials,
quota_project_id=quota_project_id,
options=[
("grpc.max_send_message_length", -1),
("grpc.max_receive_message_length", -1),
],
)
# Wrap messages. This must be done after self._grpc_channel exists
self._prep_wrapped_messages(client_info)
@classmethod
def create_channel(
cls,
host: str = "redis.googleapis.com",
credentials: ga_credentials.Credentials = None,
credentials_file: str = None,
scopes: Optional[Sequence[str]] = None,
quota_project_id: Optional[str] = None,
**kwargs,
) -> grpc.Channel:
"""Create and return a gRPC channel object.
Args:
host (Optional[str]): The host for the channel to use.
credentials (Optional[~.Credentials]): The
authorization credentials to attach to requests. These
credentials identify this application to the service. If
none are specified, the client will attempt to ascertain
the credentials from the environment.
credentials_file (Optional[str]): A file with credentials that can
be loaded with :func:`google.auth.load_credentials_from_file`.
This argument is mutually exclusive with credentials.
scopes (Optional[Sequence[str]]): A optional list of scopes needed for this
service. These are only used when credentials are not specified and
are passed to :func:`google.auth.default`.
quota_project_id (Optional[str]): An optional project to use for billing
and quota.
kwargs (Optional[dict]): Keyword arguments, which are passed to the
channel creation.
Returns:
grpc.Channel: A gRPC channel object.
Raises:
google.api_core.exceptions.DuplicateCredentialArgs: If both ``credentials``
and ``credentials_file`` are passed.
"""
return grpc_helpers.create_channel(
host,
credentials=credentials,
credentials_file=credentials_file,
quota_project_id=quota_project_id,
default_scopes=cls.AUTH_SCOPES,
scopes=scopes,
default_host=cls.DEFAULT_HOST,
**kwargs,
)
@property
def grpc_channel(self) -> grpc.Channel:
"""Return the channel designed to connect to this service.
"""
return self._grpc_channel
@property
def operations_client(self) -> operations_v1.OperationsClient:
"""Create the client designed to process long-running operations.
This property caches on the instance; repeated calls return the same
client.
"""
# Sanity check: Only create a new client if we do not already have one.
if self._operations_client is None:
self._operations_client = operations_v1.OperationsClient(self.grpc_channel)
# Return the client from cache.
return self._operations_client
@property
def list_instances(
self,
) -> Callable[
[cloud_redis.ListInstancesRequest], cloud_redis.ListInstancesResponse
]:
r"""Return a callable for the list instances method over gRPC.
Lists all Redis instances owned by a project in either the
specified location (region) or all locations.
The location should have the following format:
- ``projects/{project_id}/locations/{location_id}``
If ``location_id`` is specified as ``-`` (wildcard), then all
regions available to the project are queried, and the results
are aggregated.
Returns:
Callable[[~.ListInstancesRequest],
~.ListInstancesResponse]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "list_instances" not in self._stubs:
self._stubs["list_instances"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/ListInstances",
request_serializer=cloud_redis.ListInstancesRequest.serialize,
response_deserializer=cloud_redis.ListInstancesResponse.deserialize,
)
return self._stubs["list_instances"]
@property
def get_instance(
self,
) -> Callable[[cloud_redis.GetInstanceRequest], cloud_redis.Instance]:
r"""Return a callable for the get instance method over gRPC.
Gets the details of a specific Redis instance.
Returns:
Callable[[~.GetInstanceRequest],
~.Instance]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "get_instance" not in self._stubs:
self._stubs["get_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/GetInstance",
request_serializer=cloud_redis.GetInstanceRequest.serialize,
response_deserializer=cloud_redis.Instance.deserialize,
)
return self._stubs["get_instance"]
@property
def create_instance(
self,
) -> Callable[[cloud_redis.CreateInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the create instance method over gRPC.
Creates a Redis instance based on the specified tier and memory
size.
By default, the instance is accessible from the project's
`default network <https://cloud.google.com/vpc/docs/vpc>`__.
The creation is executed asynchronously and callers may check
the returned operation to track its progress. Once the operation
is completed the Redis instance will be fully functional. The
completed longrunning.Operation will contain the new instance
object in the response field.
The returned operation is automatically deleted after a few
hours, so there is no need to call DeleteOperation.
Returns:
Callable[[~.CreateInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "create_instance" not in self._stubs:
self._stubs["create_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/CreateInstance",
request_serializer=cloud_redis.CreateInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["create_instance"]
@property
def update_instance(
self,
) -> Callable[[cloud_redis.UpdateInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the update instance method over gRPC.
Updates the metadata and configuration of a specific
Redis instance.
Completed longrunning.Operation will contain the new
instance object in the response field. The returned
operation is automatically deleted after a few hours, so
there is no need to call DeleteOperation.
Returns:
Callable[[~.UpdateInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "update_instance" not in self._stubs:
self._stubs["update_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/UpdateInstance",
request_serializer=cloud_redis.UpdateInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["update_instance"]
@property
def upgrade_instance(
self,
) -> Callable[[cloud_redis.UpgradeInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the upgrade instance method over gRPC.
Upgrades Redis instance to the newer Redis version
specified in the request.
Returns:
Callable[[~.UpgradeInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "upgrade_instance" not in self._stubs:
self._stubs["upgrade_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/UpgradeInstance",
request_serializer=cloud_redis.UpgradeInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["upgrade_instance"]
@property
def import_instance(
self,
) -> Callable[[cloud_redis.ImportInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the import instance method over gRPC.
Import a Redis RDB snapshot file from Cloud Storage
into a Redis instance.
Redis may stop serving during this operation. Instance
state will be IMPORTING for entire operation. When
complete, the instance will contain only data from the
imported file.
The returned operation is automatically deleted after a
few hours, so there is no need to call DeleteOperation.
Returns:
Callable[[~.ImportInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "import_instance" not in self._stubs:
self._stubs["import_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/ImportInstance",
request_serializer=cloud_redis.ImportInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["import_instance"]
@property
def export_instance(
self,
) -> Callable[[cloud_redis.ExportInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the export instance method over gRPC.
Export Redis instance data into a Redis RDB format
file in Cloud Storage.
Redis will continue serving during this operation.
The returned operation is automatically deleted after a
few hours, so there is no need to call DeleteOperation.
Returns:
Callable[[~.ExportInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "export_instance" not in self._stubs:
self._stubs["export_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/ExportInstance",
request_serializer=cloud_redis.ExportInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["export_instance"]
@property
def failover_instance(
self,
) -> Callable[[cloud_redis.FailoverInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the failover instance method over gRPC.
Initiates a failover of the primary node to current
replica node for a specific STANDARD tier Cloud
Memorystore for Redis instance.
Returns:
Callable[[~.FailoverInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "failover_instance" not in self._stubs:
self._stubs["failover_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/FailoverInstance",
request_serializer=cloud_redis.FailoverInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["failover_instance"]
@property
def delete_instance(
self,
) -> Callable[[cloud_redis.DeleteInstanceRequest], operations_pb2.Operation]:
r"""Return a callable for the delete instance method over gRPC.
Deletes a specific Redis instance. Instance stops
serving and data is deleted.
Returns:
Callable[[~.DeleteInstanceRequest],
~.Operation]:
A function that, when called, will call the underlying RPC
on the server.
"""
# Generate a "stub function" on-the-fly which will actually make
# the request.
# gRPC handles serialization and deserialization, so we just need
# to pass in the functions for each.
if "delete_instance" not in self._stubs:
self._stubs["delete_instance"] = self.grpc_channel.unary_unary(
"/google.cloud.redis.v1beta1.CloudRedis/DeleteInstance",
request_serializer=cloud_redis.DeleteInstanceRequest.serialize,
response_deserializer=operations_pb2.Operation.FromString,
)
return self._stubs["delete_instance"]
def close(self):
self.grpc_channel.close()
__all__ = ("CloudRedisGrpcTransport",)