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package dev.vality.woody.api.trace.context;

import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.api.trace.propagation.W3CTraceContextPropagator;
import io.opentelemetry.context.propagation.ContextPropagators;
import io.opentelemetry.sdk.OpenTelemetrySdk;
import io.opentelemetry.sdk.trace.SdkTracerProvider;
import io.opentelemetry.sdk.trace.export.SimpleSpanProcessor;

/**
 * All SDK management takes place here, away from the instrumentation code, which should only access
 * the OpenTelemetry APIs.
 */
class ExampleConfiguration {

    /**
     * Initializes the OpenTelemetry SDK with a logging span exporter and the W3C Trace Context
     * propagator.
     *
     * @return A ready-to-use {@link OpenTelemetry} instance.
     */
    static OpenTelemetry initOpenTelemetry() {
        SdkTracerProvider sdkTracerProvider =
                SdkTracerProvider.builder()
                        .build();

        OpenTelemetrySdk sdk =
                OpenTelemetrySdk.builder()
                        .setTracerProvider(sdkTracerProvider)
                        .setPropagators(ContextPropagators.create(W3CTraceContextPropagator.getInstance()))
                        .build();

        Runtime.getRuntime().addShutdownHook(new Thread(sdkTracerProvider::close));
        return sdk;
    }
}