Revise MBeanExporterHelper reflection logic

Removed reflection logic when getting `channelNames` from bean `$autoCreateChannelCandidates` in favor of `ChannelInitializer.AutoCreateCandidatesCollector.channelNames()`

Fixes: #10167

Signed-off-by: Jiandong Ma <[email protected]>

address PR comment

Signed-off-by: Jiandong Ma <[email protected]>

Author: mjd507

spring-integration-jmx/src/main/java/org/springframework/integration/jmx/config/MBeanExporterHelper.java

@@ -17,7 +17,6 @@
 package org.springframework.integration.jmx.config;
 
 import java.util.Collection;
-import java.util.Objects;
 import java.util.Queue;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -26,10 +25,11 @@
 
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.BeansException;
-import org.springframework.beans.DirectFieldAccessor;
 import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.AnnotatedElementUtils;
+import org.springframework.integration.config.ChannelInitializer;
+import org.springframework.integration.context.IntegrationContextUtils;
 import org.springframework.integration.monitor.IntegrationMBeanExporter;
 import org.springframework.integration.support.management.IntegrationManagedResource;
 import org.springframework.jmx.export.MBeanExporter;
@@ -42,6 +42,7 @@
  *
  * @author Oleg Zhurakousky
  * @author Artem Bilan
+ * @author Jiandong Ma
  *
  * @since 2.1
  *
@@ -54,11 +55,10 @@ class MBeanExporterHelper implements DestructionAwareBeanPostProcessor, Ordered
 
 	@Override
 	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
-		if ("$autoCreateChannelCandidates".equals(beanName)) {
-			@SuppressWarnings("unchecked")
-			Collection<String> autoCreateChannelCandidatesNames =
-					(Collection<String>) new DirectFieldAccessor(bean).getPropertyValue("channelNames");
-			this.siBeanNames.addAll(Objects.requireNonNull(autoCreateChannelCandidatesNames));
+		if (IntegrationContextUtils.AUTO_CREATE_CHANNEL_CANDIDATES_BEAN_NAME.equals(beanName)) {
+			var channelCandidatesCollector = (ChannelInitializer.AutoCreateCandidatesCollector) bean;
+			Collection<String> autoCreateChannelCandidatesNames = channelCandidatesCollector.channelNames();
+			this.siBeanNames.addAll(autoCreateChannelCandidatesNames);
 			if (!this.mBeanExportersForExcludes.isEmpty()) {
 				autoCreateChannelCandidatesNames
 						.stream().