38 lines
1.1 KiB
PHP
38 lines
1.1 KiB
PHP
<?php
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declare(strict_types=1);
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use OpenTelemetry\API\Metrics\ObserverInterface;
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use OpenTelemetry\SDK\Metrics\Data\Temporality;
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use OpenTelemetry\SDK\Metrics\MeterProvider;
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use OpenTelemetry\SDK\Metrics\MetricExporter\ConsoleMetricsExporter;
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use OpenTelemetry\SDK\Metrics\MetricReader\ExportingReader;
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use OpenTelemetry\SDK\Resource\ResourceInfoFactory;
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require 'vendor/autoload.php';
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/**
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* Basic async/observable metrics generation example. This uses the console
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* metrics exporter to print metrics out in a human-readable format (but does
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* not require protobuf or the OTLP exporter)
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*/
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$reader = new ExportingReader(
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new ConsoleMetricsExporter(Temporality::DELTA)
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);
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$meterProvider = MeterProvider::builder()
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->setResource(ResourceInfoFactory::emptyResource())
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->addReader($reader)
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->build();
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$meterProvider
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->getMeter('demo_meter')
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->createObservableGauge('number', 'items', 'Random number')
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->observe(static function (ObserverInterface $observer): void {
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$observer->observe(random_int(0, 256));
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});
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//metrics are collected every time `collect()` is called
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$reader->collect();
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