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Client interface into HPCC Systems' Distributed File System.
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/*******************************************************************************
 * HPCC SYSTEMS software Copyright (C) 2024 HPCC Systems®.
 *
 * 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 org.hpccsystems.dfs.client;

import io.opentelemetry.api.GlobalOpenTelemetry;
import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.api.trace.Span;
import io.opentelemetry.api.trace.SpanKind;
import io.opentelemetry.api.trace.Tracer;
import io.opentelemetry.context.Context;

public class Utils
{
    private static OpenTelemetry globalOpenTelemetry = null;
    private static Tracer dfsClientTracer = null;

    public static OpenTelemetry getOpenTelemetry()
    {
        if (globalOpenTelemetry == null)
        {
            globalOpenTelemetry = GlobalOpenTelemetry.get();
        }

        return globalOpenTelemetry;
    }

    public static Tracer getTelemetryTracer()
    {
        if (dfsClientTracer == null)
        {
            dfsClientTracer = getOpenTelemetry().getTracer("org.hpccsystems.dfsclient");
        }

        return dfsClientTracer;
    }

    public static Span createSpan(String name)
    {
        return createChildSpan(null, name);
    }

    public static Span createChildSpan(Span parentSpan, String name)
    {
        Span span = null;
        if (parentSpan == null)
        {
            span = Utils.getTelemetryTracer().spanBuilder(name)
                                    .setSpanKind(SpanKind.CLIENT)
                                    .startSpan();
        }
        else
        {
            span = Utils.getTelemetryTracer().spanBuilder(name)
                                    .setParent(Context.current().with(parentSpan))
                                    .setSpanKind(SpanKind.CLIENT)
                                    .startSpan();
        }

        span.makeCurrent();
        return span;
    }

}