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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * SPDX-License-Identifier: EUPL-1.2 |
| 5 | * |
| 6 | * This file is part of icap-flow. |
| 7 | * |
| 8 | * Licensed under the EUPL, Version 1.2 only (the "Licence"); |
| 9 | * you may not use this work except in compliance with the Licence. |
| 10 | * You may obtain a copy of the Licence at: |
| 11 | * |
| 12 | * https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12 |
| 13 | * |
| 14 | * Unless required by applicable law or agreed to in writing, software |
| 15 | * distributed under the Licence is distributed on an "AS IS" basis, |
| 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 17 | */ |
| 18 | |
| 19 | declare(strict_types=1); |
| 20 | |
| 21 | namespace Ndrstmr\Icap\Transport; |
| 22 | |
| 23 | use Amp\Cancellation; |
| 24 | use Amp\Socket\Socket as SocketInterface; |
| 25 | use Closure; |
| 26 | use Ndrstmr\Icap\Config; |
| 27 | |
| 28 | /** |
| 29 | * No-op connection pool: every {@see acquire()} opens a fresh TCP/TLS |
| 30 | * connection, every {@see release()} closes it immediately. No idle |
| 31 | * sockets are ever kept. |
| 32 | * |
| 33 | * Use this when connection reuse is explicitly unwanted (e.g. testing, |
| 34 | * debugging, or ICAP servers that close the connection after every |
| 35 | * request anyway). |
| 36 | * |
| 37 | * It does not limit connections: with this pool, as without one, the |
| 38 | * application limits its own concurrency. {@see AmpConnectionPool} does. |
| 39 | * |
| 40 | * @see AmpConnectionPool for the keep-alive variant |
| 41 | */ |
| 42 | final class NullConnectionPool implements ConnectionPoolInterface |
| 43 | { |
| 44 | /** @var Closure(Config, ?Cancellation): SocketInterface */ |
| 45 | private Closure $connector; |
| 46 | |
| 47 | /** |
| 48 | * @param (Closure(Config, ?Cancellation): SocketInterface)|null $connector optional override for testing |
| 49 | */ |
| 50 | public function __construct(?Closure $connector = null) |
| 51 | { |
| 52 | $this->connector = $connector ?? SocketOpener::open(...); |
| 53 | } |
| 54 | |
| 55 | #[\Override] |
| 56 | public function acquire(Config $config, ?Cancellation $cancellation = null): SocketInterface |
| 57 | { |
| 58 | return ($this->connector)($config, $cancellation); |
| 59 | } |
| 60 | |
| 61 | #[\Override] |
| 62 | public function release(Config $config, SocketInterface $socket): void |
| 63 | { |
| 64 | $socket->close(); |
| 65 | } |
| 66 | |
| 67 | #[\Override] |
| 68 | public function close(): void |
| 69 | { |
| 70 | // Nothing to do — no idle sockets are ever stored. |
| 71 | } |
| 72 | } |