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<?php |
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namespace Padosoft\SuperCacheInvalidate\Helpers; |
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use Illuminate\Support\Facades\DB; |
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use Illuminate\Support\Facades\Log; |
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use Illuminate\Support\Facades\Redis; |
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class SuperCacheInvalidationHelper |
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{ |
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/** |
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* Insert a cache invalidation event into the database. |
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* |
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* @param string $type 'key' or 'tag' |
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* @param string $identifier The cache key or tag to invalidate |
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* @param string|null $connection_name The Redis Connection name (optional, 'default') |
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* @param string|null $reason Reason for invalidation (optional) |
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* @param int|null $totalShards Total number of shards (from config if null) |
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* @param int|null $priority Priority of the event |
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* @param array|null $associatedIdentifiers Optional array of associated tags or keys |
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*/ |
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public function insertInvalidationEvent( |
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string $type, |
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string $identifier, |
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?string $connection_name = null, |
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?string $reason = null, |
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?int $totalShards = 0, |
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?int $priority = 0, |
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?array $associatedIdentifiers = [], |
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): void { |
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$shard = crc32($identifier) % ($totalShards > 0 ? $totalShards : config('super_cache_invalidate.total_shards', 10)); |
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$redisConnectionName = $connection_name ?? config('super_cache_invalidate.default_connection_name'); |
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$data = [ |
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'type' => $type, |
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'identifier' => $identifier, |
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'connection_name' => $redisConnectionName, |
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'reason' => $reason, |
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'priority' => $priority, |
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'event_time' => now(), |
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'processed' => 0, |
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'shard' => $shard, |
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]; |
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$maxAttempts = 5; |
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$attempts = 0; |
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$insertOk = false; |
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while ($attempts < $maxAttempts && !$insertOk) { |
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DB::beginTransaction(); |
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try { |
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// Cerca di bloccare il record per l'inserimento |
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$partitionCache_invalidation_events = $this->getCacheInvalidationEventsPartitionName($shard, $priority); |
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$eventId = DB::table(DB::raw("`cache_invalidation_events` PARTITION ({$partitionCache_invalidation_events})"))->insertGetId($data); |
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// Insert associated identifiers |
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// TODO JB 31/12/2024: per adesso commentato, da riattivare quando tutto funziona alla perfezione usando la partizione |
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/* |
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if (!empty($associatedIdentifiers)) { |
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$associations = []; |
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foreach ($associatedIdentifiers as $associated) { |
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$associations[] = [ |
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'event_id' => $eventId, |
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'associated_type' => $associated['type'], // 'key' or 'tag' |
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'associated_identifier' => $associated['identifier'], |
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'connection_name' => $associated['connection_name'], |
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'created_at' => now(), |
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]; |
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} |
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DB::table('cache_invalidation_event_associations')->insert($associations); |
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} |
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*/ |
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$insertOk = true; |
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DB::commit(); // Completa la transazione |
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} catch (\Throwable $e) { |
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DB::rollBack(); // Annulla la transazione in caso di errore |
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$attempts++; |
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Log::error("SuperCacheInvalidate: impossibile eseguire insert, tentativo $attempts di $maxAttempts: " . $e->getMessage()); |
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// Logica per gestire i tentativi falliti |
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if ($attempts >= $maxAttempts) { |
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// Salta il record dopo il numero massimo di tentativi |
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Log::error("SuperCacheInvalidate: impossibile eseguire insert dopo $maxAttempts tentativi: " . $e->getMessage()); |
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} |
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} |
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} |
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} |
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/** |
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* Acquire a lock for processing a shard. |
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* |
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* @param int $shardId The shard number |
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* @param int $lockTimeout Lock timeout in seconds |
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* @param string $connection_name The Redis Connection name |
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* @return string|false The lock value if acquired, false otherwise |
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*/ |
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public function acquireShardLock(int $shardId, int $priority, int $lockTimeout, string $connection_name): bool|string |
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{ |
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$lockKey = 'shard_lock:' . $shardId . '_' . $priority; |
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// Il metodo has/exists occupa troppa memoria!!! |
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$retrieveValue = Redis::connection($connection_name)->get($lockKey); |
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if ($retrieveValue !== null) { |
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// Lock già attivo |
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return false; |
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} |
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$lockValue = uniqid('', true); |
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$isLocked = Redis::connection($connection_name)->set($lockKey, $lockValue); |
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if ($lockTimeout > 0) { |
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Redis::connection($connection_name)->expire($lockKey, $lockTimeout); |
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} |
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return $isLocked ? $lockValue : false; |
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} |
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/** |
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* Release the lock for a shard. |
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* |
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* @param int $shardId The shard number |
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* @param string $lockValue The lock value to validate ownership |
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* @param string $connection_name The Redis Connection name |
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*/ |
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public function releaseShardLock(int $shardId, int $priority, string $lockValue, string $connection_name): void |
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{ |
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$lockKey = 'shard_lock:' . $shardId . '_' . $priority; |
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$currentValue = Redis::connection($connection_name)->get($lockKey); |
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if ($currentValue === $lockValue) { |
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Redis::connection($connection_name)->del($lockKey); |
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} |
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} |
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public function getCacheInvalidationEventsPartitionName(int $shardId, int $priorityId): string |
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{ |
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// Calcola il valore della partizione |
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$shards = config('super_cache_invalidate.total_shards', 10); |
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$priorities = [0, 1]; |
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$partitionStatements = []; |
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$partitionValueId = ($priorityId * $shards) + $shardId + 1; |
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// Partitions for unprocessed events |
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foreach ($priorities as $priority) { |
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for ($shard = 0; $shard < $shards; $shard++) { |
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$partitionName = "p_unprocessed_s{$shard}_p{$priority}"; |
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$partitionValue = ($priority * $shards) + $shard + 1; |
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if ($partitionValueId < $partitionValue) { |
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return $partitionName; |
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} |
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} |
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} |
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return ''; |
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} |
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} |
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padosoft /
laravel-super-cache-invalidate
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