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Distributed tracing using OpenTelemetry

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.quarkus.component.opentelemetry;

import io.opentelemetry.api.trace.Tracer;
import io.quarkus.arc.DefaultBean;
import jakarta.enterprise.inject.Produces;
import jakarta.inject.Inject;
import jakarta.inject.Singleton;
import org.apache.camel.opentelemetry.CamelQuarkusOpenTelemetryTracer;
import org.apache.camel.opentelemetry.OpenTelemetryTracer;
import org.apache.camel.opentelemetry.OpenTelemetryTracingStrategy;

@Singleton
public class OpenTelemetryTracerProducer {

    @Inject
    CamelOpenTelemetryConfig config;

    @Inject
    Tracer tracer;

    @Produces
    @Singleton
    @DefaultBean
    public OpenTelemetryTracer getOpenTelemetry() {
        OpenTelemetryTracer openTelemetryTracer = new CamelQuarkusOpenTelemetryTracer();
        if (tracer != null) {
            openTelemetryTracer.setTracer(tracer);
            if (config.excludePatterns.isPresent()) {
                openTelemetryTracer.setExcludePatterns(config.excludePatterns.get());
            }

            if (config.traceProcessors) {
                OpenTelemetryTracingStrategy tracingStrategy = new OpenTelemetryTracingStrategy(openTelemetryTracer);
                tracingStrategy.setPropagateContext(true);
                openTelemetryTracer.setTracingStrategy(tracingStrategy);
            }

            openTelemetryTracer.setEncoding(config.encoding);
        }
        return openTelemetryTracer;
    }
}