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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2024 Robin Appelman <robin@icewind.nl>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\DB\QueryBuilder\Sharded;
use OC\DB\ConnectionAdapter;
use OC\DB\ConnectionFactory;
use OC\SystemConfig;
use OCP\IDBConnection;
/**
* Keeps track of the db connections to the various shards
*/
class ShardConnectionManager {
/** @var array<string, IDBConnection> */
private array $connections = [];
public function __construct(
private SystemConfig $config,
private ConnectionFactory $factory,
) {
}
public function getConnection(ShardDefinition $shardDefinition, int $shard): IDBConnection {
$connectionKey = $shardDefinition->table . '_' . $shard;
if (isset($this->connections[$connectionKey])) {
return $this->connections[$connectionKey];
}
if ($shard === ShardDefinition::MIGRATION_SHARD) {
$this->connections[$connectionKey] = \OC::$server->get(IDBConnection::class);
} elseif (isset($shardDefinition->shards[$shard])) {
$this->connections[$connectionKey] = $this->createConnection($shardDefinition->shards[$shard]);
} else {
throw new \InvalidArgumentException("invalid shard key $shard only " . count($shardDefinition->shards) . ' configured');
}
return $this->connections[$connectionKey];
}
private function createConnection(array $shardConfig): IDBConnection {
$shardConfig['sharding'] = [];
$type = $this->config->getValue('dbtype', 'sqlite');
return new ConnectionAdapter($this->factory->getConnection($type, $shardConfig));
}
}
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