private static final boolean BAGGAGE_ENABLED =
      DeclarativeConfigUtil.getInstrumentationConfig(
              GlobalOpenTelemetry.get(), "log4j_context_data")
          .getBoolean(
              "add_baggage",
              ConfigPropertiesUtil.getBoolean(
                  "otel.instrumentation.log4j-context-data.add-baggage", false));

plugins {
    id("java")
    id("application")
}
description = "OpenTelemetry Log Appender Example - Initialization Bug"
group = "com.krinosx.logging"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    implementation(platform("io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha:2.25.0-alpha"))

    // Log4j
    implementation(platform("org.apache.logging.log4j:log4j-bom:2.25.3"))
    implementation("org.apache.logging.log4j:log4j-api")
    implementation("org.apache.logging.log4j:log4j-core")

    // OpenTelemetry core
    implementation("io.opentelemetry:opentelemetry-sdk")
    implementation("io.opentelemetry:opentelemetry-exporter-otlp")
    implementation("io.opentelemetry.semconv:opentelemetry-semconv")

    // OpenTelemetry log4j / logback appenders
    implementation("io.opentelemetry.instrumentation:opentelemetry-log4j-appender-2.17")
    implementation("io.opentelemetry:opentelemetry-exporter-logging-otlp:1.59.0")
}

java {
    toolchain {
        languageVersion.set(JavaLanguageVersion.of(21))
    }
}

application {
    mainClass = "com.krinosx.logging.Main"
}

package com.krinosx.logging;

import io.opentelemetry.api.GlobalOpenTelemetry;
import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.api.trace.Span;
import io.opentelemetry.context.Scope;
import io.opentelemetry.sdk.OpenTelemetrySdk;
import io.opentelemetry.sdk.trace.SdkTracerProvider;
import io.opentelemetry.sdk.trace.samplers.Sampler;
import org.apache.logging.log4j.LogManager;

public class Main {

// uncomment this logger to trigger the exception
//    static final org.apache.logging.log4j.Logger log4jLogger =
//            LogManager.getLogger("log4j-logger");
    public static void main(String[] args) {

        OpenTelemetry openTelemetry = initializeOpenTelemetry();
        // Install OpenTelemetry in log4j appender
        io.opentelemetry.instrumentation.log4j.appender.v2_17.OpenTelemetryAppender.install(openTelemetry);


        Span span = GlobalOpenTelemetry.getTracer("my-tracer").spanBuilder("my-span").startSpan();
        try (Scope unused = span.makeCurrent()) {
            System.out.println("Current -> TraceId: " + span.getSpanContext().getTraceId() + " spanId: " + span.getSpanContext().getSpanId());
        } finally {
            span.end();
        }
    }


    private static OpenTelemetry initializeOpenTelemetry() {

        SdkTracerProvider tracerProvider = SdkTracerProvider.builder()
                .setSampler(Sampler.alwaysOn()).build();

        OpenTelemetrySdk sdk =
                OpenTelemetrySdk.builder()
                        .setTracerProvider(tracerProvider)
                        .buildAndRegisterGlobal();

        // Add hook to close SDK, which flushes logs
        Runtime.getRuntime().addShutdownHook(new Thread(sdk::close));
        return sdk;
    }
}