grpc.py

# -*- 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.service_usage_v1.types import resources
from google.cloud.service_usage_v1.types import serviceusage
from google.longrunning import operations_pb2  # type: ignore
from .base import ServiceUsageTransport, DEFAULT_CLIENT_INFO


class ServiceUsageGrpcTransport(ServiceUsageTransport):
    """gRPC backend transport for ServiceUsage.

    Enables services that service consumers want to use on Google Cloud
    Platform, lists the available or enabled services, or disables
    services that service consumers no longer use.

    See `Service Usage
    API <https://cloud.google.com/service-usage/docs/overview>`__

    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 = "serviceusage.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 = 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 = "serviceusage.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 enable_service(
        self,
    ) -> Callable[[serviceusage.EnableServiceRequest], operations_pb2.Operation]:
        r"""Return a callable for the enable service method over gRPC.

        Enable a service so that it can be used with a
        project.

        Returns:
            Callable[[~.EnableServiceRequest],
                    ~.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 "enable_service" not in self._stubs:
            self._stubs["enable_service"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/EnableService",
                request_serializer=serviceusage.EnableServiceRequest.serialize,
                response_deserializer=operations_pb2.Operation.FromString,
            )
        return self._stubs["enable_service"]

    @property
    def disable_service(
        self,
    ) -> Callable[[serviceusage.DisableServiceRequest], operations_pb2.Operation]:
        r"""Return a callable for the disable service method over gRPC.

        Disable a service so that it can no longer be used with a
        project. This prevents unintended usage that may cause
        unexpected billing charges or security leaks.

        It is not valid to call the disable method on a service that is
        not currently enabled. Callers will receive a
        ``FAILED_PRECONDITION`` status if the target service is not
        currently enabled.

        Returns:
            Callable[[~.DisableServiceRequest],
                    ~.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 "disable_service" not in self._stubs:
            self._stubs["disable_service"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/DisableService",
                request_serializer=serviceusage.DisableServiceRequest.serialize,
                response_deserializer=operations_pb2.Operation.FromString,
            )
        return self._stubs["disable_service"]

    @property
    def get_service(
        self,
    ) -> Callable[[serviceusage.GetServiceRequest], resources.Service]:
        r"""Return a callable for the get service method over gRPC.

        Returns the service configuration and enabled state
        for a given service.

        Returns:
            Callable[[~.GetServiceRequest],
                    ~.Service]:
                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_service" not in self._stubs:
            self._stubs["get_service"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/GetService",
                request_serializer=serviceusage.GetServiceRequest.serialize,
                response_deserializer=resources.Service.deserialize,
            )
        return self._stubs["get_service"]

    @property
    def list_services(
        self,
    ) -> Callable[
        [serviceusage.ListServicesRequest], serviceusage.ListServicesResponse
    ]:
        r"""Return a callable for the list services method over gRPC.

        List all services available to the specified project, and the
        current state of those services with respect to the project. The
        list includes all public services, all services for which the
        calling user has the ``servicemanagement.services.bind``
        permission, and all services that have already been enabled on
        the project. The list can be filtered to only include services
        in a specific state, for example to only include services
        enabled on the project.

        WARNING: If you need to query enabled services frequently or
        across an organization, you should use `Cloud Asset Inventory
        API <https://cloud.google.com/asset-inventory/docs/apis>`__,
        which provides higher throughput and richer filtering
        capability.

        Returns:
            Callable[[~.ListServicesRequest],
                    ~.ListServicesResponse]:
                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_services" not in self._stubs:
            self._stubs["list_services"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/ListServices",
                request_serializer=serviceusage.ListServicesRequest.serialize,
                response_deserializer=serviceusage.ListServicesResponse.deserialize,
            )
        return self._stubs["list_services"]

    @property
    def batch_enable_services(
        self,
    ) -> Callable[[serviceusage.BatchEnableServicesRequest], operations_pb2.Operation]:
        r"""Return a callable for the batch enable services method over gRPC.

        Enable multiple services on a project. The operation is atomic:
        if enabling any service fails, then the entire batch fails, and
        no state changes occur. To enable a single service, use the
        ``EnableService`` method instead.

        Returns:
            Callable[[~.BatchEnableServicesRequest],
                    ~.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 "batch_enable_services" not in self._stubs:
            self._stubs["batch_enable_services"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/BatchEnableServices",
                request_serializer=serviceusage.BatchEnableServicesRequest.serialize,
                response_deserializer=operations_pb2.Operation.FromString,
            )
        return self._stubs["batch_enable_services"]

    @property
    def batch_get_services(
        self,
    ) -> Callable[
        [serviceusage.BatchGetServicesRequest], serviceusage.BatchGetServicesResponse
    ]:
        r"""Return a callable for the batch get services method over gRPC.

        Returns the service configurations and enabled states
        for a given list of services.

        Returns:
            Callable[[~.BatchGetServicesRequest],
                    ~.BatchGetServicesResponse]:
                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 "batch_get_services" not in self._stubs:
            self._stubs["batch_get_services"] = self.grpc_channel.unary_unary(
                "/google.api.serviceusage.v1.ServiceUsage/BatchGetServices",
                request_serializer=serviceusage.BatchGetServicesRequest.serialize,
                response_deserializer=serviceusage.BatchGetServicesResponse.deserialize,
            )
        return self._stubs["batch_get_services"]


__all__ = ("ServiceUsageGrpcTransport",)