spring-projectsGH-9260: Fix IntegrationManagementConfiguration.obtainObservationPatterns() logic

Fixes: spring-projects#9260

The current `IntegrationManagementConfiguration.obtainObservationPatterns()` is to always have an `*` as a first
pattern in the final result.
Because of `HashSet` natural order.
This would lead to ignore all the patterns, especially those with negation

* Fix `IntegrationManagementConfiguration.obtainObservationPatterns()` logic to ignore regular
patterns if `*` is present.
Optimization wise.
* Always put `*` into the end of final array let negative patterns to do their job
* Modify `IntegrationGraphServerTests` & `WebFluxObservationPropagationTests`
test configurations to ensure that `*` pattern does not have a precedence over negative patterns.

**Auto-cherry-pick to `6.3.x` & `6.2.x`**

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationManagementConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2022 the original author or authors.
+ * Copyright 2015-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,10 @@
 
 package org.springframework.integration.config;
 
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.Map;
-import java.util.Set;
+import java.util.stream.Collectors;
 
 import io.micrometer.observation.ObservationRegistry;
 
@@ -88,17 +89,27 @@ public IntegrationManagementConfigurer managementConfigurer(
 	}
 
 	private String[] obtainObservationPatterns() {
-		Set<String> observationPatterns = new HashSet<>();
+		Collection<String> observationPatterns = new HashSet<>();
 		String[] patternsProperties = (String[]) this.attributes.get("observationPatterns");
+		boolean hasAsterisk = false;
 		for (String patternProperty : patternsProperties) {
 			String patternValue = this.environment.resolvePlaceholders(patternProperty);
 			String[] patternsToProcess = StringUtils.commaDelimitedListToStringArray(patternValue);
 			for (String pattern : patternsToProcess) {
-				if (StringUtils.hasText(pattern)) {
+				hasAsterisk |= "*".equals(pattern);
+				if (StringUtils.hasText(pattern) && (pattern.startsWith("!") || !hasAsterisk)) {
 					observationPatterns.add(pattern);
 				}
 			}
 		}
+		if (hasAsterisk) {
+			observationPatterns =
+					observationPatterns.stream()
+							.filter((pattern) -> pattern.startsWith("!"))
+							.collect(Collectors.toList());
+
+			observationPatterns.add("*");
+		}
 		return observationPatterns.toArray(new String[0]);
 	}
 

spring-integration-core/src/test/java/org/springframework/integration/graph/IntegrationGraphServerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 the original author or authors.
+ * Copyright 2016-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -290,7 +290,7 @@ void timersViaObservationArePopulated() {
 
 	@Configuration
 	@EnableIntegration
-	@EnableIntegrationManagement(observationPatterns = "myFilter")
+	@EnableIntegrationManagement(observationPatterns = { "myFilter", "*" })
 	@IntegrationComponentScan
 	@ImportResource("org/springframework/integration/graph/integration-graph-context.xml")
 	public static class Config {

spring-integration-webflux/src/test/java/org/springframework/integration/webflux/observation/WebFluxObservationPropagationTests.java

@@ -125,7 +125,7 @@ void observationIsPropagatedWebFluxRequestReply() {
 	@Configuration
 	@EnableWebFlux
 	@EnableIntegration
-	@EnableIntegrationManagement(observationPatterns = "*")
+	@EnableIntegrationManagement(observationPatterns = "*,!notObserved*")
 	public static class ContextConfiguration {
 
 		@Bean
@@ -200,6 +200,8 @@ IntegrationFlow webFluxRequestReplyFlow(
 					.transformWith(t -> t
 							.<String, String>transformer(String::toLowerCase)
 							.id("testTransformer"))
+					.channel("notObservedChannel")
+					.bridge(e -> e.id("notObservedEndpoint"))
 					.get();
 		}