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base.py
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base.py
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# -*- coding: utf-8 -*-
# Copyright 2024 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 abc
from typing import Awaitable, Callable, Dict, Optional, Sequence, Union
from google.pubsub_v1 import gapic_version as package_version
import google.auth # type: ignore
import google.api_core
from google.api_core import exceptions as core_exceptions
from google.api_core import gapic_v1
from google.api_core import retry as retries
from google.auth import credentials as ga_credentials # type: ignore
from google.oauth2 import service_account # type: ignore
from google.iam.v1 import iam_policy_pb2 # type: ignore
from google.iam.v1 import policy_pb2 # type: ignore
from google.protobuf import empty_pb2 # type: ignore
from google.pubsub_v1.types import pubsub
DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
client_library_version=package_version.__version__
)
class PublisherTransport(abc.ABC):
"""Abstract transport class for Publisher."""
AUTH_SCOPES = (
"https://www.googleapis.com/auth/cloud-platform",
"https://www.googleapis.com/auth/pubsub",
)
DEFAULT_HOST: str = "pubsub.googleapis.com"
def __init__(
self,
*,
host: str = DEFAULT_HOST,
credentials: Optional[ga_credentials.Credentials] = None,
credentials_file: Optional[str] = None,
scopes: Optional[Sequence[str]] = None,
quota_project_id: Optional[str] = None,
client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
always_use_jwt_access: Optional[bool] = False,
api_audience: Optional[str] = None,
**kwargs,
) -> None:
"""Instantiate the transport.
Args:
host (Optional[str]):
The hostname to connect to (default: 'pubsub.googleapis.com').
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.
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 list of scopes.
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.
"""
scopes_kwargs = {"scopes": scopes, "default_scopes": self.AUTH_SCOPES}
# Save the scopes.
self._scopes = scopes
# If no credentials are provided, then determine the appropriate
# defaults.
if credentials and credentials_file:
raise core_exceptions.DuplicateCredentialArgs(
"'credentials_file' and 'credentials' are mutually exclusive"
)
if credentials_file is not None:
credentials, _ = google.auth.load_credentials_from_file(
credentials_file, **scopes_kwargs, quota_project_id=quota_project_id
)
elif credentials is None:
credentials, _ = google.auth.default(
**scopes_kwargs, quota_project_id=quota_project_id
)
# Don't apply audience if the credentials file passed from user.
if hasattr(credentials, "with_gdch_audience"):
credentials = credentials.with_gdch_audience(
api_audience if api_audience else host
)
# If the credentials are service account credentials, then always try to use self signed JWT.
if (
always_use_jwt_access
and isinstance(credentials, service_account.Credentials)
and hasattr(service_account.Credentials, "with_always_use_jwt_access")
):
credentials = credentials.with_always_use_jwt_access(True)
# Save the credentials.
self._credentials = credentials
# Save the hostname. Default to port 443 (HTTPS) if none is specified.
if ":" not in host:
host += ":443"
self._host = host
@property
def host(self):
return self._host
def _prep_wrapped_messages(self, client_info):
# Precompute the wrapped methods.
self._wrapped_methods = {
self.create_topic: gapic_v1.method.wrap_method(
self.create_topic,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.ServiceUnavailable,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.update_topic: gapic_v1.method.wrap_method(
self.update_topic,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.ServiceUnavailable,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.publish: gapic_v1.method.wrap_method(
self.publish,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=4,
predicate=retries.if_exception_type(
core_exceptions.Aborted,
core_exceptions.Cancelled,
core_exceptions.DeadlineExceeded,
core_exceptions.InternalServerError,
core_exceptions.ResourceExhausted,
core_exceptions.ServiceUnavailable,
core_exceptions.Unknown,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.get_topic: gapic_v1.method.wrap_method(
self.get_topic,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.Aborted,
core_exceptions.ServiceUnavailable,
core_exceptions.Unknown,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.list_topics: gapic_v1.method.wrap_method(
self.list_topics,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.Aborted,
core_exceptions.ServiceUnavailable,
core_exceptions.Unknown,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.list_topic_subscriptions: gapic_v1.method.wrap_method(
self.list_topic_subscriptions,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.Aborted,
core_exceptions.ServiceUnavailable,
core_exceptions.Unknown,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.list_topic_snapshots: gapic_v1.method.wrap_method(
self.list_topic_snapshots,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.Aborted,
core_exceptions.ServiceUnavailable,
core_exceptions.Unknown,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.delete_topic: gapic_v1.method.wrap_method(
self.delete_topic,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.ServiceUnavailable,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
self.detach_subscription: gapic_v1.method.wrap_method(
self.detach_subscription,
default_retry=retries.Retry(
initial=0.1,
maximum=60.0,
multiplier=1.3,
predicate=retries.if_exception_type(
core_exceptions.ServiceUnavailable,
),
deadline=600.0,
),
default_timeout=60.0,
client_info=client_info,
),
}
def close(self):
"""Closes resources associated with the transport.
.. warning::
Only call this method if the transport is NOT shared
with other clients - this may cause errors in other clients!
"""
raise NotImplementedError()
@property
def create_topic(
self,
) -> Callable[[pubsub.Topic], Union[pubsub.Topic, Awaitable[pubsub.Topic]]]:
raise NotImplementedError()
@property
def update_topic(
self,
) -> Callable[
[pubsub.UpdateTopicRequest], Union[pubsub.Topic, Awaitable[pubsub.Topic]]
]:
raise NotImplementedError()
@property
def publish(
self,
) -> Callable[
[pubsub.PublishRequest],
Union[pubsub.PublishResponse, Awaitable[pubsub.PublishResponse]],
]:
raise NotImplementedError()
@property
def get_topic(
self,
) -> Callable[
[pubsub.GetTopicRequest], Union[pubsub.Topic, Awaitable[pubsub.Topic]]
]:
raise NotImplementedError()
@property
def list_topics(
self,
) -> Callable[
[pubsub.ListTopicsRequest],
Union[pubsub.ListTopicsResponse, Awaitable[pubsub.ListTopicsResponse]],
]:
raise NotImplementedError()
@property
def list_topic_subscriptions(
self,
) -> Callable[
[pubsub.ListTopicSubscriptionsRequest],
Union[
pubsub.ListTopicSubscriptionsResponse,
Awaitable[pubsub.ListTopicSubscriptionsResponse],
],
]:
raise NotImplementedError()
@property
def list_topic_snapshots(
self,
) -> Callable[
[pubsub.ListTopicSnapshotsRequest],
Union[
pubsub.ListTopicSnapshotsResponse,
Awaitable[pubsub.ListTopicSnapshotsResponse],
],
]:
raise NotImplementedError()
@property
def delete_topic(
self,
) -> Callable[
[pubsub.DeleteTopicRequest], Union[empty_pb2.Empty, Awaitable[empty_pb2.Empty]]
]:
raise NotImplementedError()
@property
def detach_subscription(
self,
) -> Callable[
[pubsub.DetachSubscriptionRequest],
Union[
pubsub.DetachSubscriptionResponse,
Awaitable[pubsub.DetachSubscriptionResponse],
],
]:
raise NotImplementedError()
@property
def set_iam_policy(
self,
) -> Callable[
[iam_policy_pb2.SetIamPolicyRequest],
Union[policy_pb2.Policy, Awaitable[policy_pb2.Policy]],
]:
raise NotImplementedError()
@property
def get_iam_policy(
self,
) -> Callable[
[iam_policy_pb2.GetIamPolicyRequest],
Union[policy_pb2.Policy, Awaitable[policy_pb2.Policy]],
]:
raise NotImplementedError()
@property
def test_iam_permissions(
self,
) -> Callable[
[iam_policy_pb2.TestIamPermissionsRequest],
Union[
iam_policy_pb2.TestIamPermissionsResponse,
Awaitable[iam_policy_pb2.TestIamPermissionsResponse],
],
]:
raise NotImplementedError()
@property
def kind(self) -> str:
raise NotImplementedError()
__all__ = ("PublisherTransport",)