MetricSourceInterface.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\SDK\Metrics;

use OpenTelemetry\SDK\Metrics\Data\Metric;
interface MetricSourceInterface {
    
    /**
     * Returns the last metric collection timestamp.
     *
     * @return int last collection timestamp
     */
    public function collectionTimestamp() : int;
    
    /**
     * Collects metric data from the underlying provider.
     *
     * @return Metric collected metric
     */
    public function collect() : Metric;

}