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<?php
namespace ZoiloMora\ElasticAPM\Events\MetricSet;
/**
* A single metric sample.
*/
final class Sample implements \JsonSerializable
{
* @var string
private $name;
* @var double
private $value;
* @param string $name
* @param double $value
public function __construct($name, $value)
$this->assertName($name);
$this->name = $name;
$this->value = (double) $value;
}
* @param string|null $name
*
* @return void
* @throws \InvalidArgumentException
private function assertName($name)
if (false === is_string($name)) {
throw new \InvalidArgumentException('The [name] must be of type string.');
if (0 === preg_match('/^[^*"]*$/', $name)) {
throw new \InvalidArgumentException('The [name] must match the regular expression /^[^*"]*$/');
* @return array
public function jsonSerialize()
return [
$this->name => [
'value' => $this->value,
]
];
zoilomora /
elastic-apm-agent-php
