always need map converter (#13224)

Co-authored-by: Jean Bisutti <jean.bisutti@gmail.com>

instrumentation/spring/spring-boot-autoconfigure/src/main/java/io/opentelemetry/instrumentation/spring/autoconfigure/OpenTelemetryAutoConfiguration.java

@@ -7,7 +7,7 @@ package io.opentelemetry.instrumentation.spring.autoconfigure;
 
 import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.api.trace.TracerProvider;
-import io.opentelemetry.instrumentation.spring.autoconfigure.internal.MapConverter;
+import io.opentelemetry.instrumentation.spring.autoconfigure.internal.OtelMapConverter;
 import io.opentelemetry.instrumentation.spring.autoconfigure.internal.SdkEnabled;
 import io.opentelemetry.instrumentation.spring.autoconfigure.internal.properties.OtelResourceProperties;
 import io.opentelemetry.instrumentation.spring.autoconfigure.internal.properties.OtelSpringProperties;
@@ -64,9 +64,9 @@ public class OpenTelemetryAutoConfiguration {
 
     @Bean
     @ConfigurationPropertiesBinding
-    public MapConverter mapConverter() {
+    public OtelMapConverter otelMapConverter() {
       // needed for otlp exporter headers and OtelResourceProperties
-      return new MapConverter();
+      return new OtelMapConverter();
     }
 
     @Bean
@@ -133,6 +133,17 @@ public class OpenTelemetryAutoConfiguration {
   @ConditionalOnProperty(name = "otel.sdk.disabled", havingValue = "true")
   static class DisabledOpenTelemetrySdkConfig {
 
+    @Bean
+    @ConfigurationPropertiesBinding
+    // Duplicated in OpenTelemetrySdkConfig and DisabledOpenTelemetrySdkConfig to not expose the
+    // converter in the public API
+    public OtelMapConverter otelMapConverter() {
+      // needed for otlp exporter headers and OtelResourceProperties
+      // we need this converter, even if the SDK is disabled,
+      // because the properties are parsed before the SDK is disabled
+      return new OtelMapConverter();
+    }
+
     @Bean
     public OpenTelemetry openTelemetry() {
       return OpenTelemetry.noop();

instrumentation/spring/spring-boot-autoconfigure/src/main/java/io/opentelemetry/instrumentation/spring/autoconfigure/internal/OtelMapConverter.java

@@ -20,7 +20,7 @@ import org.springframework.core.convert.converter.Converter;
  * <p>This class is internal and is hence not for public use. Its APIs are unstable and can change
  * at any time.
  */
-public class MapConverter implements Converter<String, Map<String, String>> {
+public class OtelMapConverter implements Converter<String, Map<String, String>> {
 
   public static final String KEY = "key";
 

instrumentation/spring/spring-boot-autoconfigure/src/test/java/io/opentelemetry/instrumentation/spring/autoconfigure/OpenTelemetryAutoConfigurationTest.java

@@ -156,7 +156,9 @@ class OpenTelemetryAutoConfigurationTest {
   void shouldInitializeNoopOpenTelemetryWhenSdkIsDisabled() {
     this.contextRunner
         .withConfiguration(AutoConfigurations.of(OpenTelemetryAutoConfiguration.class))
-        .withPropertyValues("otel.sdk.disabled=true")
+        .withPropertyValues(
+            "otel.sdk.disabled=true",
+            "otel.resource.attributes=service.name=workflow-backend-dev,service.version=3c8f9ce9")
         .run(
             context ->
                 assertThat(context).getBean("openTelemetry").isEqualTo(OpenTelemetry.noop()));