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/*
 * Copyright The Athenz Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.yahoo.athenz.common.metrics.impl;

import com.yahoo.athenz.common.metrics.Metric;
import com.yahoo.athenz.common.metrics.MetricFactory;
import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk;

/*
   In order to use the otlp exporters you need to configure the environment variables.
   You need to set the endpoint (OTEL_EXPORTER_OTLP_ENDPOINT) which is defaulted to
   "http:://localhost:4317" and the attributes (OTEL_RESOURCE_ATTRIBUTES) which is defaulted
   to "service.name=my-service." AutoConfiguredOpenTelemetrySdk automatically reads the
   configuration and sets up the exporter.
*/

public class OpenTelemetryMetricFactory implements MetricFactory {
    @Override
    public Metric create() {
        OpenTelemetry openTelemetry = initialize();
        return new OpenTelemetryMetric(openTelemetry);
    }

    public OpenTelemetry initialize() {
        return AutoConfiguredOpenTelemetrySdk.initialize().getOpenTelemetrySdk();
    }
}