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| 1 | <?php |
| 2 | |
| 3 | /* |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2023 (original work) Open Assessment Technologies SA; |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | namespace oat\generis\persistence\Graph; |
| 23 | |
| 24 | use Laudis\Neo4j\Contracts\ClientInterface; |
| 25 | use Laudis\Neo4j\Contracts\UnmanagedTransactionInterface; |
| 26 | use Laudis\Neo4j\Databags\Statement; |
| 27 | use Laudis\Neo4j\Databags\SummarizedResult; |
| 28 | |
| 29 | class BasicTransactionManager implements TransactionManagerInterface |
| 30 | { |
| 31 | private ClientInterface $client; |
| 32 | private UnmanagedTransactionInterface $transaction; |
| 33 | |
| 34 | public function __construct(ClientInterface $client) |
| 35 | { |
| 36 | $this->client = $client; |
| 37 | } |
| 38 | |
| 39 | public function beginTransaction(): void |
| 40 | { |
| 41 | try { |
| 42 | $this->transaction = $this->client->beginTransaction(); |
| 43 | } catch (\Throwable $e) { |
| 44 | throw new GraphTransactionException('Transaction was not started.', $e); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | public function commit(): void |
| 49 | { |
| 50 | try { |
| 51 | if (isset($this->transaction)) { |
| 52 | $this->transaction->commit(); |
| 53 | unset($this->transaction); |
| 54 | } |
| 55 | } catch (\Throwable $e) { |
| 56 | throw new GraphTransactionException('Transaction was not committed.', $e); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | public function rollback(): void |
| 61 | { |
| 62 | try { |
| 63 | if (isset($this->transaction)) { |
| 64 | $this->transaction->rollback(); |
| 65 | unset($this->transaction); |
| 66 | } |
| 67 | } catch (\Throwable $e) { |
| 68 | throw new GraphTransactionException('Transaction was not rolled back.', $e); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | public function run(string $statement, iterable $parameters = []): SummarizedResult |
| 73 | { |
| 74 | try { |
| 75 | if (isset($this->transaction)) { |
| 76 | $result = $this->transaction->run($statement, $parameters); |
| 77 | } else { |
| 78 | $result = $this->client->run($statement, $parameters); |
| 79 | } |
| 80 | } catch (\Throwable $e) { |
| 81 | throw new GraphTransactionException( |
| 82 | sprintf('Exception happen during query run: %s.', $e->getMessage()), |
| 83 | $e |
| 84 | ); |
| 85 | } |
| 86 | |
| 87 | return $result; |
| 88 | } |
| 89 | |
| 90 | public function runStatement(Statement $statement): SummarizedResult |
| 91 | { |
| 92 | try { |
| 93 | if (isset($this->transaction)) { |
| 94 | $result = $this->transaction->runStatement($statement); |
| 95 | } else { |
| 96 | $result = $this->client->runStatement($statement); |
| 97 | } |
| 98 | } catch (\Throwable $e) { |
| 99 | throw new GraphTransactionException( |
| 100 | sprintf('Exception happen during statement run: %s.', $e->getMessage()), |
| 101 | $e |
| 102 | ); |
| 103 | } |
| 104 | |
| 105 | return $result; |
| 106 | } |
| 107 | } |