1 # Copyright (C) The Arvados Authors. All rights reserved.
3 # SPDX-License-Identifier: Apache-2.0
4 """Thread-safe wrapper for an Arvados API client
6 This module provides `ThreadSafeApiCache`, a thread-safe, API-compatible
10 from __future__ import absolute_import
12 from builtins import object
19 class ThreadSafeApiCache(object):
20 """Thread-safe wrapper for an Arvados API client
22 This class takes all the arguments necessary to build a lower-level
23 Arvados API client `googleapiclient.discovery.Resource`, then
24 transparently builds and wraps a unique object per thread. This works
25 around the fact that the client's underlying HTTP client object is not
30 apiconfig: Mapping[str, str] | None
31 : A mapping with entries for `ARVADOS_API_HOST`, `ARVADOS_API_TOKEN`,
32 and optionally `ARVADOS_API_HOST_INSECURE`. If not provided, uses
33 `arvados.config.settings` to get these parameters from user
34 configuration. You can pass an empty mapping to build the client
35 solely from `api_params`.
37 keep_params: Mapping[str, Any]
38 : Keyword arguments used to construct an associated
39 `arvados.keep.KeepClient`.
41 api_params: Mapping[str, Any]
42 : Keyword arguments used to construct each thread's API client. These
43 have the same meaning as in the `arvados.api.api` function.
46 : A string naming the version of the Arvados API to use. If not specified,
47 the code will log a warning and fall back to 'v1'.
50 def __init__(self, apiconfig=None, keep_params={}, api_params={}, version=None):
51 if apiconfig or apiconfig is None:
52 self._api_kwargs = api.api_kwargs_from_config(version, apiconfig, **api_params)
54 self._api_kwargs = api.normalize_api_kwargs(version, **api_params)
55 self.api_token = self._api_kwargs['token']
56 self.local = threading.local()
57 self.keep = keep.KeepClient(api_client=self, **keep_params)
60 if 'api' not in self.local.__dict__:
61 self.local.api = api.api_client(**self._api_kwargs)
64 def __getattr__(self, name):
65 # Proxy nonexistent attributes to the thread-local API client.
66 return getattr(self.localapi(), name)