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client.py
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client.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.
#
from collections import OrderedDict
import re
from typing import Callable, Dict, Iterable, Iterator, Sequence, Tuple, Type, Union
import pkg_resources
import google.api_core.client_options as ClientOptions # type: ignore
from google.api_core import exceptions # type: ignore
from google.api_core import gapic_v1 # type: ignore
from google.api_core import retry as retries # type: ignore
from google.auth import credentials # type: ignore
from google.oauth2 import service_account # type: ignore
from google.cloud.mediatranslation_v1beta1.types import media_translation
from google.rpc import status_pb2 as status # type: ignore
from .transports.base import SpeechTranslationServiceTransport
from .transports.grpc import SpeechTranslationServiceGrpcTransport
class SpeechTranslationServiceClientMeta(type):
"""Metaclass for the SpeechTranslationService client.
This provides class-level methods for building and retrieving
support objects (e.g. transport) without polluting the client instance
objects.
"""
_transport_registry = (
OrderedDict()
) # type: Dict[str, Type[SpeechTranslationServiceTransport]]
_transport_registry["grpc"] = SpeechTranslationServiceGrpcTransport
def get_transport_class(
cls, label: str = None
) -> Type[SpeechTranslationServiceTransport]:
"""Return an appropriate transport class.
Args:
label: The name of the desired transport. If none is
provided, then the first transport in the registry is used.
Returns:
The transport class to use.
"""
# If a specific transport is requested, return that one.
if label:
return cls._transport_registry[label]
# No transport is requested; return the default (that is, the first one
# in the dictionary).
return next(iter(cls._transport_registry.values()))
class SpeechTranslationServiceClient(metaclass=SpeechTranslationServiceClientMeta):
"""Provides translation from/to media types."""
@staticmethod
def _get_default_mtls_endpoint(api_endpoint):
"""Convert api endpoint to mTLS endpoint.
Convert "*.sandbox.googleapis.com" and "*.googleapis.com" to
"*.mtls.sandbox.googleapis.com" and "*.mtls.googleapis.com" respectively.
Args:
api_endpoint (Optional[str]): the api endpoint to convert.
Returns:
str: converted mTLS api endpoint.
"""
if not api_endpoint:
return api_endpoint
mtls_endpoint_re = re.compile(
r"(?P<name>[^.]+)(?P<mtls>\.mtls)?(?P<sandbox>\.sandbox)?(?P<googledomain>\.googleapis\.com)?"
)
m = mtls_endpoint_re.match(api_endpoint)
name, mtls, sandbox, googledomain = m.groups()
if mtls or not googledomain:
return api_endpoint
if sandbox:
return api_endpoint.replace(
"sandbox.googleapis.com", "mtls.sandbox.googleapis.com"
)
return api_endpoint.replace(".googleapis.com", ".mtls.googleapis.com")
DEFAULT_ENDPOINT = "mediatranslation.googleapis.com"
DEFAULT_MTLS_ENDPOINT = _get_default_mtls_endpoint.__func__( # type: ignore
DEFAULT_ENDPOINT
)
@classmethod
def from_service_account_file(cls, filename: str, *args, **kwargs):
"""Creates an instance of this client using the provided credentials
file.
Args:
filename (str): The path to the service account private key json
file.
args: Additional arguments to pass to the constructor.
kwargs: Additional arguments to pass to the constructor.
Returns:
{@api.name}: The constructed client.
"""
credentials = service_account.Credentials.from_service_account_file(filename)
kwargs["credentials"] = credentials
return cls(*args, **kwargs)
from_service_account_json = from_service_account_file
def __init__(
self,
*,
credentials: credentials.Credentials = None,
transport: Union[str, SpeechTranslationServiceTransport] = None,
client_options: ClientOptions = None,
) -> None:
"""Instantiate the speech translation service client.
Args:
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.
transport (Union[str, ~.SpeechTranslationServiceTransport]): The
transport to use. If set to None, a transport is chosen
automatically.
client_options (ClientOptions): Custom options for the client.
(1) The ``api_endpoint`` property can be used to override the
default endpoint provided by the client.
(2) If ``transport`` argument is None, ``client_options`` can be
used to create a mutual TLS transport. If ``client_cert_source``
is provided, mutual TLS transport will be created with the given
``api_endpoint`` or the default mTLS endpoint, and the client
SSL credentials obtained from ``client_cert_source``.
Raises:
google.auth.exceptions.MutualTlsChannelError: If mutual TLS transport
creation failed for any reason.
"""
if isinstance(client_options, dict):
client_options = ClientOptions.from_dict(client_options)
# Save or instantiate the transport.
# Ordinarily, we provide the transport, but allowing a custom transport
# instance provides an extensibility point for unusual situations.
if isinstance(transport, SpeechTranslationServiceTransport):
# transport is a SpeechTranslationServiceTransport instance.
if credentials:
raise ValueError(
"When providing a transport instance, "
"provide its credentials directly."
)
self._transport = transport
elif client_options is None or (
client_options.api_endpoint is None
and client_options.client_cert_source is None
):
# Don't trigger mTLS if we get an empty ClientOptions.
Transport = type(self).get_transport_class(transport)
self._transport = Transport(
credentials=credentials, host=self.DEFAULT_ENDPOINT
)
else:
# We have a non-empty ClientOptions. If client_cert_source is
# provided, trigger mTLS with user provided endpoint or the default
# mTLS endpoint.
if client_options.client_cert_source:
api_mtls_endpoint = (
client_options.api_endpoint
if client_options.api_endpoint
else self.DEFAULT_MTLS_ENDPOINT
)
else:
api_mtls_endpoint = None
api_endpoint = (
client_options.api_endpoint
if client_options.api_endpoint
else self.DEFAULT_ENDPOINT
)
self._transport = SpeechTranslationServiceGrpcTransport(
credentials=credentials,
host=api_endpoint,
api_mtls_endpoint=api_mtls_endpoint,
client_cert_source=client_options.client_cert_source,
)
def streaming_translate_speech(
self,
requests: Iterator[media_translation.StreamingTranslateSpeechRequest] = None,
*,
retry: retries.Retry = gapic_v1.method.DEFAULT,
timeout: float = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Iterable[media_translation.StreamingTranslateSpeechResponse]:
r"""Performs bidirectional streaming speech translation:
receive results while sending audio. This method is only
available via the gRPC API (not REST).
Args:
requests (Iterator[`~.media_translation.StreamingTranslateSpeechRequest`]):
The request object iterator. The top-level message sent by the
client for the `StreamingTranslateSpeech` method.
Multiple `StreamingTranslateSpeechRequest` messages are
sent. The first message must contain a
`streaming_config` message and must not contain
`audio_content` data. All subsequent messages must
contain `audio_content` data and must not contain a
`streaming_config` message.
retry (google.api_core.retry.Retry): Designation of what errors, if any,
should be retried.
timeout (float): The timeout for this request.
metadata (Sequence[Tuple[str, str]]): Strings which should be
sent along with the request as metadata.
Returns:
Iterable[~.media_translation.StreamingTranslateSpeechResponse]:
A streaming speech translation
response corresponding to a portion of
the audio currently processed.
"""
# Wrap the RPC method; this adds retry and timeout information,
# and friendly error handling.
rpc = gapic_v1.method.wrap_method(
self._transport.streaming_translate_speech,
default_timeout=None,
client_info=_client_info,
)
# Send the request.
response = rpc(requests, retry=retry, timeout=timeout, metadata=metadata)
# Done; return the response.
return response
try:
_client_info = gapic_v1.client_info.ClientInfo(
gapic_version=pkg_resources.get_distribution(
"google-cloud-media-translation"
).version
)
except pkg_resources.DistributionNotFound:
_client_info = gapic_v1.client_info.ClientInfo()
__all__ = ("SpeechTranslationServiceClient",)