Polishing.

Simplify code and tests.

See #3459
Original pull request: #3461

src/main/java/org/springframework/data/repository/config/DeferredRepositoryInitializationListener.java

@@ -48,18 +48,12 @@ class DeferredRepositoryInitializationListener implements ApplicationListener<Co
 	public void onApplicationEvent(ContextRefreshedEvent event) {
 
 		ApplicationContext context = event.getApplicationContext();
-
-		// Ignore events from child contexts (e.g., Spring Cloud OpenFeign, LoadBalancer)
-		// to avoid premature repository initialization.
-		// See https://github.com/spring-projects/spring-boot/commit/708cbd72942e65906ea32ab3204af6c4e58a7314
-		if (context instanceof ConfigurableApplicationContext cac && cac.getBeanFactory() != beanFactory) {
+		if (context instanceof ConfigurableApplicationContext cac && !cac.getBeanFactory().equals(beanFactory)) {
 			return;
 		}
 
 		logger.info("Triggering deferred initialization of Spring Data repositories…");
-
 		beanFactory.getBeansOfType(Repository.class);
-
 		logger.info("Spring Data repositories initialized");
 	}
 

src/test/java/org/springframework/data/repository/config/DeferredRepositoryInitializationListenerUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-present the original author or authors.
+ * Copyright 2026-present 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.
@@ -19,11 +19,11 @@ import static org.mockito.Mockito.*;
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
-import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
 import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.context.ApplicationContext;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.event.ContextRefreshedEvent;
 import org.springframework.context.support.GenericApplicationContext;
@@ -32,105 +32,47 @@ import org.springframework.data.repository.Repository;
 /**
  * Unit tests for {@link DeferredRepositoryInitializationListener}.
  *
- * @author Oliver Drotbohm
- * @author seongjun-rpls
+ * @author Seongjun Ha
+ * @author Mark Paluch
  */
 @ExtendWith(MockitoExtension.class)
 class DeferredRepositoryInitializationListenerUnitTests {
 
-	@Mock ListableBeanFactory beanFactory;
-
 	@Test // GH-3459
-	void triggersInitializationOnMatchingContextEvent() {
-
-		var context = new GenericApplicationContext();
-		context.refresh();
+	void triggersInitializationCorrectly() {
 
-		// Create listener with the real context's BeanFactory
-		var listener = new DeferredRepositoryInitializationListener(context.getBeanFactory());
+		var beanFactory = mock(DefaultListableBeanFactory.class);
+		var context = mock(ApplicationContext.class);
+		var listener = new DeferredRepositoryInitializationListener(beanFactory);
 
-		// Fire event from the same context
 		listener.onApplicationEvent(new ContextRefreshedEvent(context));
 
-		// The test verifies no exception is thrown and listener completes normally
-		// Since we're using real context, we can't easily mock getBeansOfType
-		context.close();
+		verify(beanFactory).getBeansOfType(Repository.class);
 	}
 
 	@Test // GH-3459
-	void ignoresEventsFromChildContext() {
+	void triggersInitializationForConfigurableApplicationContext() {
 
-		// Mock beanFactory that should NOT be called
-		ListableBeanFactory mockBeanFactory = mock(ListableBeanFactory.class);
-		var listener = new DeferredRepositoryInitializationListener(mockBeanFactory);
+		var beanFactory = mock(DefaultListableBeanFactory.class);
+		var context = mock(ConfigurableApplicationContext.class);
+		var listener = new DeferredRepositoryInitializationListener(beanFactory);
+		when(context.getBeanFactory()).thenReturn(beanFactory);
 
-		// Create a real context (will have different beanFactory)
-		var context = new GenericApplicationContext();
-		context.refresh();
-
-		// Fire event - should be ignored because context.getBeanFactory() != mockBeanFactory
 		listener.onApplicationEvent(new ContextRefreshedEvent(context));
 
-		// Verify the mock was never called
-		verify(mockBeanFactory, never()).getBeansOfType(Repository.class);
-
-		context.close();
+		verify(beanFactory).getBeansOfType(Repository.class);
 	}
 
 	@Test // GH-3459
-	void triggersInitializationOnParentContextEvent() {
-
-		// Create a mock beanFactory
-		DefaultListableBeanFactory mockBeanFactory = mock(DefaultListableBeanFactory.class);
-
-		// Create a mock ConfigurableApplicationContext
-		ConfigurableApplicationContext mockContext = mock(ConfigurableApplicationContext.class);
-		when(mockContext.getBeanFactory()).thenReturn(mockBeanFactory);
+	void ignoresEventsFromChildContext() {
 
-		// Create listener with the same mock beanFactory
-		var listener = new DeferredRepositoryInitializationListener(mockBeanFactory);
+		var beanFactory = mock(ListableBeanFactory.class);
+		var listener = new DeferredRepositoryInitializationListener(beanFactory);
 
-		// Fire event from the mock context
-		listener.onApplicationEvent(new ContextRefreshedEvent(mockContext));
+		listener.onApplicationEvent(new ContextRefreshedEvent(new GenericApplicationContext()));
 
-		// Verify getBeansOfType WAS called
-		verify(mockBeanFactory).getBeansOfType(Repository.class);
+		verify(beanFactory, never()).getBeansOfType(Repository.class);
 	}
 
-	@Test // GH-3459
-	void ignoresEventsFromSiblingChildContexts() {
-
-		// Create a mock beanFactory for the "parent" listener
-		DefaultListableBeanFactory mockParentBeanFactory = mock(DefaultListableBeanFactory.class);
 
-		// Create listener as if registered in a parent context
-		var listener = new DeferredRepositoryInitializationListener(mockParentBeanFactory);
-
-		// Create real child contexts (simulates Feign-like scenario)
-		var childContext1 = new GenericApplicationContext();
-		childContext1.refresh();
-
-		var childContext2 = new GenericApplicationContext();
-		childContext2.refresh();
-
-		// Fire events from child contexts - should be ignored
-		listener.onApplicationEvent(new ContextRefreshedEvent(childContext1));
-		listener.onApplicationEvent(new ContextRefreshedEvent(childContext2));
-
-		// Verify that getBeansOfType was NOT called for child context events
-		verify(mockParentBeanFactory, never()).getBeansOfType(Repository.class);
-
-		// Now create a mock parent context that returns our mock beanFactory
-		ConfigurableApplicationContext mockParentContext = mock(ConfigurableApplicationContext.class);
-		when(mockParentContext.getBeanFactory()).thenReturn(mockParentBeanFactory);
-
-		// Fire event from "parent" context
-		listener.onApplicationEvent(new ContextRefreshedEvent(mockParentContext));
-
-		// Verify that getBeansOfType WAS called exactly once for parent context
-		verify(mockParentBeanFactory, times(1)).getBeansOfType(Repository.class);
-
-		childContext1.close();
-		childContext2.close();
-	}
 }