Hugo van Kemenade
6e3f1a1194
* Upgrade syntax with pyupgrade --py38-plus Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> * Convert to f-strings with flynt Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> * Format with Black Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> * Remove redundant mock backport dependency Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> * isort imports Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> * Add changelog entry Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> --------- Signed-off-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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#
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# The OpenSearch Contributors require contributions made to
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# this file be licensed under the Apache-2.0 license or a
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# compatible open source license.
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#
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# Modifications Copyright OpenSearch Contributors. See
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# GitHub history for details.
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#
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# Licensed to Elasticsearch B.V. under one or more contributor
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# license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright
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# ownership. Elasticsearch B.V. licenses this file to you under
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# the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from typing import Any
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from .base import Connection
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try:
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import queue
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except ImportError:
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import Queue as queue # type: ignore
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class PoolingConnection(Connection):
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_free_connections: queue.Queue[Connection]
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"""
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Base connection class for connections that use libraries without thread
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safety and no capacity for connection pooling. To use this just implement a
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``_make_connection`` method that constructs a new connection and returns
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it.
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"""
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def __init__(self, *args: Any, **kwargs: Any) -> None:
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self._free_connections = queue.Queue()
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super().__init__(*args, **kwargs)
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def _make_connection(self) -> Connection:
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raise NotImplementedError
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def _get_connection(self) -> Connection:
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try:
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return self._free_connections.get_nowait()
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except queue.Empty:
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return self._make_connection()
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def _release_connection(self, con: Connection) -> None:
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self._free_connections.put(con)
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def close(self) -> None:
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"""
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Explicitly close connection
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"""
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pass
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