GH-946 - Make sure ModuleTracingBeanPostProcessor is executed early.

Fixes GH-946.

spring-modulith-observability/pom.xml

@@ -99,6 +99,12 @@
 			<scope>test</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.amqp</groupId>
+			<artifactId>spring-rabbit</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 	</dependencies>
 
 </project>

spring-modulith-observability/src/main/java/org/springframework/modulith/observability/ModuleTracingBeanPostProcessor.java

@@ -33,6 +33,7 @@ import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.BeanPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.core.Ordered;
 import org.springframework.modulith.runtime.ApplicationModulesRuntime;
 import org.springframework.util.Assert;
 
@@ -42,7 +43,7 @@ import org.springframework.util.Assert;
  *
  * @author Oliver Drotbohm
  */
-public class ModuleTracingBeanPostProcessor extends ModuleTracingSupport implements BeanPostProcessor {
+public class ModuleTracingBeanPostProcessor extends ModuleTracingSupport implements BeanPostProcessor, Ordered {
 
 	public static final String MODULE_BAGGAGE_KEY = "org.springframework.modulith.module";
 
@@ -70,6 +71,15 @@ public class ModuleTracingBeanPostProcessor extends ModuleTracingSupport impleme
 		this.factory = factory;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.core.Ordered#getOrder()
+	 */
+	@Override
+	public int getOrder() {
+		return Ordered.LOWEST_PRECEDENCE - 50;
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String)

spring-modulith-observability/src/test/java/org/springframework/modulith/observability/ModuleTracingBeanPostProcessorUnitTests.java

@@ -22,6 +22,7 @@ import static org.mockito.Mockito.*;
 import example.sample.SampleProperties;
 
 import org.junit.jupiter.api.Test;
+import org.springframework.amqp.rabbit.annotation.RabbitListenerAnnotationBeanPostProcessor;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.modulith.runtime.ApplicationModulesRuntime;
@@ -50,4 +51,15 @@ class ModuleTracingBeanPostProcessorUnitTests {
 
 		assertThat(result).isSameAs(bean);
 	}
+
+	@Test // GH-936
+	void processorIsRegisteredBefore() {
+
+		var rabbitProcessor = new RabbitListenerAnnotationBeanPostProcessor();
+		var tracingProcessor = new ModuleTracingBeanPostProcessor(mock(ApplicationModulesRuntime.class), () -> null,
+				new DefaultListableBeanFactory());
+
+		assertThat(rabbitProcessor.getOrder()).isGreaterThan(tracingProcessor.getOrder());
+
+	}
 }