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Added support of Predis library as storage adapter
Signed-off-by: Łukasz Adamczewski <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
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| namespace Prometheus\Storage; | ||
|
|
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| use Predis\Configuration\Option\Prefix; | ||
| use Prometheus\Exception\StorageException; | ||
| use Predis\Client; | ||
|
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| /** | ||
| * @property Client $redis | ||
| */ | ||
| final class Predis extends Redis | ||
| { | ||
| /** | ||
| * @var mixed[] | ||
| */ | ||
| private static array $defaultOptions = [ | ||
| 'host' => '127.0.0.1', | ||
| 'port' => 6379, | ||
| 'scheme' => 'tcp', | ||
| 'timeout' => 0.1, | ||
| 'read_timeout' => '10', | ||
| 'persistent' => 0, | ||
| 'password' => null, | ||
| ]; | ||
|
|
||
| public function __construct(array $options = []) | ||
| { | ||
| $this->options = array_merge(self::$defaultOptions, $options); | ||
|
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| parent::__construct($options); | ||
|
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| $this->redis = new Client($this->options); | ||
| } | ||
|
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| public static function fromClient(Client $redis): self | ||
| { | ||
| if ($redis->isConnected() === false) { | ||
| throw new StorageException('Connection to Redis server not established'); | ||
| } | ||
|
|
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| $self = new self(); | ||
| $self->redis = $redis; | ||
|
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| return $self; | ||
| } | ||
|
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| protected function ensureOpenConnection(): void | ||
| { | ||
| if ($this->redis->isConnected() === false) { | ||
| $this->redis->connect(); | ||
| } | ||
| } | ||
|
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| public static function fromExistingConnection(\Redis $redis): Redis | ||
| { | ||
| throw new \RuntimeException('This method is not supported by predis adapter'); | ||
| } | ||
|
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| protected function getGlobalPrefix(): ?string | ||
| { | ||
| if ($this->redis->getOptions()->prefix === null) { | ||
| return null; | ||
| } | ||
|
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| if ($this->redis->getOptions()->prefix instanceof Prefix) { | ||
| return $this->redis->getOptions()->prefix->getPrefix(); | ||
| } | ||
|
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| return null; | ||
| } | ||
|
|
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| /** | ||
| * @param mixed[] $args | ||
| * @param int $keysCount | ||
| * @return mixed[] | ||
| */ | ||
| protected function evalParams(array $args, int $keysCount): array | ||
| { | ||
| return [$keysCount, ...$args]; | ||
| } | ||
|
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|
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| protected function prefix(string $key): string | ||
| { | ||
| // the predis is doing key prefixing on its own | ||
| return ''; | ||
| } | ||
|
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| protected function setParams(array $input): array | ||
| { | ||
| $values = array_values($input); | ||
| $params = []; | ||
|
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| if (isset($input['EX'])) { | ||
| $params[] = 'EX'; | ||
| $params[] = $input['EX']; | ||
| } | ||
|
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| if (isset($input['PX'])) { | ||
| $params[] = 'PX'; | ||
| $params[] = $input['PX']; | ||
| } | ||
|
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| $params[] = $values[0]; | ||
|
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| return $params; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| <?php | ||
|
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| declare(strict_types=1); | ||
|
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| namespace Test\Prometheus\Predis; | ||
|
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| use Predis\Client; | ||
| use Prometheus\Storage\Predis; | ||
| use Test\Prometheus\AbstractCollectorRegistryTest; | ||
|
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| /** | ||
| * @requires predis | ||
| */ | ||
| class CollectorRegistryTest extends AbstractCollectorRegistryTest | ||
| { | ||
| public function configureAdapter(): void | ||
| { | ||
| $this->adapter = new Predis(['host' => REDIS_HOST]); | ||
| $this->adapter->wipeStorage(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
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| namespace Test\Prometheus\Predis; | ||
|
|
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| use Predis\Client; | ||
| use Prometheus\Storage\Predis; | ||
| use Test\Prometheus\AbstractCounterTest; | ||
|
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| /** | ||
| * See https://prometheus.io/docs/instrumenting/exposition_formats/ | ||
| * @requires extension redis | ||
| */ | ||
| class CounterTest extends AbstractCounterTest | ||
| { | ||
| public function configureAdapter(): void | ||
| { | ||
| $this->adapter = new Predis(['host' => REDIS_HOST]); | ||
| $this->adapter->wipeStorage(); | ||
| } | ||
| } |
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