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<?php |
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declare(strict_types=1); |
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namespace App\Infrastructure\ObjectStorage; |
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use App\Infrastructure\Exception\ObjectNotFoundException; |
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use DateTime; |
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use Redis; |
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/** |
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* This adapter stores values in Redis using following approach: |
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* - Stores following data in sorted set: |
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* key: Key |
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* value: SHA512(Key):Timestamp |
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* score: Timestamp |
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* - Then stores the actual data as a key-value. The key is taken from value of the sorted set. |
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* This is because sorted set requires uniqueness of the values which would break the history if someone changes values to: |
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* value1 -> value2 -> value1. |
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*/ |
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class RedisObjectStorageAdapter implements ObjectStorageAdapter |
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{ |
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protected Redis $redis; |
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public function __construct(Redis $redis) |
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{ |
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$this->redis = $redis; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function store(string $key, $data, DateTime $timestamp): void |
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{ |
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$storageKey = sprintf('%s:%s', hash('sha512', $key), $timestamp->getTimestamp()); |
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$this->redis->zAdd($key, ['CH'], $timestamp->getTimestamp(), $storageKey); |
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$this->redis->set($storageKey, json_encode($data)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get(string $key, DateTime $timestamp) |
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{ |
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$score = (string) $timestamp->getTimestamp(); |
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$result = $this->redis->zRevRangeByScore($key, $score, '-inf', ['limit' => [0, 1]]); |
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if (!\count($result)) { |
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throw new ObjectNotFoundException($key, $timestamp); |
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} |
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return json_decode($this->redis->get($result[0])); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function clear(): void |
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{ |
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$this->redis->flushDB(); |
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} |
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} |
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IonBazan /
object-store
