1 files changed, 111 insertions, 0 deletions
diff --git a/vendor/open-telemetry/api/Metrics/MeterInterface.php b/vendor/open-telemetry/api/Metrics/MeterInterface.php
new file mode 100644
index 000000000..6e06d9085
--- /dev/null
+++ b/vendor/open-telemetry/api/Metrics/MeterInterface.php
@@ -0,0 +1,111 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Metrics;
+
+interface MeterInterface
+{
+
+    /**
+     * Creates a `Counter`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @return CounterInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#counter-creation
+     */
+    public function createCounter(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null
+    ): CounterInterface;
+
+    /**
+     * Creates an `ObservableCounter`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @param callable ...$callbacks responsible for reporting measurements
+     * @return ObservableCounterInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#asynchronous-counter-creation
+     */
+    public function createObservableCounter(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null,
+        callable ...$callbacks
+    ): ObservableCounterInterface;
+
+    /**
+     * Creates a `Histogram`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @return HistogramInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#histogram-creation
+     */
+    public function createHistogram(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null
+    ): HistogramInterface;
+
+    /**
+     * Creates an `ObservableGauge`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @param callable ...$callbacks responsible for reporting measurements
+     * @return ObservableGaugeInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#asynchronous-gauge-creation
+     */
+    public function createObservableGauge(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null,
+        callable ...$callbacks
+    ): ObservableGaugeInterface;
+
+    /**
+     * Creates an `UpDownCounter`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @return UpDownCounterInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#updowncounter-creation
+     */
+    public function createUpDownCounter(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null
+    ): UpDownCounterInterface;
+
+    /**
+     * Creates an `ObservableUpDownCounter`.
+     *
+     * @param string $name name of the instrument
+     * @param string|null $unit unit of measure
+     * @param string|null $description description of the instrument
+     * @param callable ...$callbacks responsible for reporting measurements
+     * @return ObservableUpDownCounterInterface created instrument
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#asynchronous-updowncounter-creation
+     */
+    public function createObservableUpDownCounter(
+        string $name,
+        ?string $unit = null,
+        ?string $description = null,
+        callable ...$callbacks
+    ): ObservableUpDownCounterInterface;
+}