(#9297)

- use compile dependency on `:javaagent-bootstrap` and do runtime check before use.

Author: cleverchuk

instrumentation/log4j/log4j-context-data/log4j-context-data-2.17/library-autoconfigure/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 base.archivesName.set("${base.archivesName.get()}-autoconfigure")
 
 dependencies {
-  implementation(project(":javaagent-bootstrap"))
+  compileOnly(project(":javaagent-bootstrap"))
   library("org.apache.logging.log4j:log4j-core:2.17.0")
 
   testImplementation(project(":instrumentation:log4j:log4j-context-data:log4j-context-data-common:testing"))

instrumentation/log4j/log4j-context-data/log4j-context-data-2.17/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/log4j/contextdata/v2_17/OpenTelemetryContextDataProvider.java

@@ -48,7 +48,13 @@ public Map<String, String> supplyContextData() {
     contextData.put(TRACE_ID, spanContext.getTraceId());
     contextData.put(SPAN_ID, spanContext.getSpanId());
     contextData.put(TRACE_FLAGS, spanContext.getTraceFlags().asHex());
-    contextData.putAll(ConfiguredResourceAttributesHolder.getResourceAttributes());
+
+    try {
+      Class.forName("io.opentelemetry.javaagent.bootstrap.ConfiguredResourceAttributesHolder");
+      contextData.putAll(ConfiguredResourceAttributesHolder.getResourceAttributes());
+    } catch (ClassNotFoundException ok) {
+      // This probably shouldn't happen, however if it does happen we don't care.
+    }
 
     if (BAGGAGE_ENABLED) {
       Baggage baggage = Baggage.fromContext(context);