Polish "Apply container customizer bean to AMQP MessageListenerContainer"

See gh-27625

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitAnnotationDrivenConfiguration.java

@@ -51,23 +51,14 @@ class RabbitAnnotationDrivenConfiguration {
 
 	private final ObjectProvider<RabbitRetryTemplateCustomizer> retryTemplateCustomizers;
 
-	private final ObjectProvider<ContainerCustomizer<SimpleMessageListenerContainer>> simpleContainerCustomizer;
-
-	private final ObjectProvider<ContainerCustomizer<DirectMessageListenerContainer>> directContainerCustomizer;
-
 	private final RabbitProperties properties;
 
 	RabbitAnnotationDrivenConfiguration(ObjectProvider<MessageConverter> messageConverter,
 			ObjectProvider<MessageRecoverer> messageRecoverer,
-			ObjectProvider<RabbitRetryTemplateCustomizer> retryTemplateCustomizers,
-			ObjectProvider<ContainerCustomizer<SimpleMessageListenerContainer>> simpleContainerCustomizer,
-			ObjectProvider<ContainerCustomizer<DirectMessageListenerContainer>> directContainerCustomizer,
-			RabbitProperties properties) {
+			ObjectProvider<RabbitRetryTemplateCustomizer> retryTemplateCustomizers, RabbitProperties properties) {
 		this.messageConverter = messageConverter;
 		this.messageRecoverer = messageRecoverer;
 		this.retryTemplateCustomizers = retryTemplateCustomizers;
-		this.simpleContainerCustomizer = simpleContainerCustomizer;
-		this.directContainerCustomizer = directContainerCustomizer;
 		this.properties = properties;
 	}
 
@@ -88,10 +79,11 @@ class RabbitAnnotationDrivenConfiguration {
 	@ConditionalOnProperty(prefix = "spring.rabbitmq.listener", name = "type", havingValue = "simple",
 			matchIfMissing = true)
 	SimpleRabbitListenerContainerFactory simpleRabbitListenerContainerFactory(
-			SimpleRabbitListenerContainerFactoryConfigurer configurer, ConnectionFactory connectionFactory) {
+			SimpleRabbitListenerContainerFactoryConfigurer configurer, ConnectionFactory connectionFactory,
+			ObjectProvider<ContainerCustomizer<SimpleMessageListenerContainer>> simpleContainerCustomizer) {
 		SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
 		configurer.configure(factory, connectionFactory);
-		this.simpleContainerCustomizer.ifUnique(factory::setContainerCustomizer);
+		simpleContainerCustomizer.ifUnique(factory::setContainerCustomizer);
 		return factory;
 	}
 
@@ -111,10 +103,11 @@ class RabbitAnnotationDrivenConfiguration {
 	@ConditionalOnMissingBean(name = "rabbitListenerContainerFactory")
 	@ConditionalOnProperty(prefix = "spring.rabbitmq.listener", name = "type", havingValue = "direct")
 	DirectRabbitListenerContainerFactory directRabbitListenerContainerFactory(
-			DirectRabbitListenerContainerFactoryConfigurer configurer, ConnectionFactory connectionFactory) {
+			DirectRabbitListenerContainerFactoryConfigurer configurer, ConnectionFactory connectionFactory,
+			ObjectProvider<ContainerCustomizer<DirectMessageListenerContainer>> directContainerCustomizer) {
 		DirectRabbitListenerContainerFactory factory = new DirectRabbitListenerContainerFactory();
 		configurer.configure(factory, connectionFactory);
-		this.directContainerCustomizer.ifUnique(factory::setContainerCustomizer);
+		directContainerCustomizer.ifUnique(factory::setContainerCustomizer);
 		return factory;
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java

@@ -64,6 +64,7 @@ import org.springframework.boot.test.system.CapturedOutput;
 import org.springframework.boot.test.system.OutputCaptureExtension;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
 import org.springframework.context.annotation.Primary;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
@@ -78,6 +79,7 @@ import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.isNull;
@@ -854,17 +856,20 @@ class RabbitAutoConfigurationTests {
 	}
 
 	@Test
-	void simpleContainerCustomizer() {
-		this.contextRunner.withUserConfiguration(SimpleContainerCustomizerConfiguration.class).run(
-				(context) -> assertThat(context.getBean(SimpleContainerCustomizerConfiguration.class).customizerCalled)
-						.isTrue());
+	@SuppressWarnings("unchecked")
+	void whenASimpleContainerCustomizerIsDefinedThenItIsCalledToConfigureTheContainer() {
+		this.contextRunner.withUserConfiguration(SimpleContainerCustomizerConfiguration.class)
+				.run((context) -> verify(context.getBean(ContainerCustomizer.class))
+						.configure(any(SimpleMessageListenerContainer.class)));
 	}
 
 	@Test
-	void directContainerCustomizer() {
+	@SuppressWarnings("unchecked")
+	void whenADirectContainerCustomizerIsDefinedThenItIsCalledToConfigureTheContainer() {
 		this.contextRunner.withUserConfiguration(DirectContainerCustomizerConfiguration.class)
-				.withPropertyValues("spring.rabbitmq.listener.type:direct").run((context) -> assertThat(
-						context.getBean(DirectContainerCustomizerConfiguration.class).customizerCalled).isTrue());
+				.withPropertyValues("spring.rabbitmq.listener.type:direct")
+				.run((context) -> verify(context.getBean(ContainerCustomizer.class))
+						.configure(any(DirectMessageListenerContainer.class)));
 	}
 
 	private com.rabbitmq.client.ConnectionFactory getTargetConnectionFactory(AssertableApplicationContext context) {
@@ -1131,34 +1136,34 @@ class RabbitAutoConfigurationTests {
 
 	}
 
+	@Import(TestListener.class)
 	@Configuration(proxyBeanMethods = false)
 	static class SimpleContainerCustomizerConfiguration {
 
-		boolean customizerCalled;
-
-		@RabbitListener(queues = "test", autoStartup = "false")
-		void listen(String in) {
-		}
-
 		@Bean
+		@SuppressWarnings("unchecked")
 		ContainerCustomizer<SimpleMessageListenerContainer> customizer() {
-			return (container) -> this.customizerCalled = true;
+			return mock(ContainerCustomizer.class);
 		}
 
 	}
 
+	@Import(TestListener.class)
 	@Configuration(proxyBeanMethods = false)
 	static class DirectContainerCustomizerConfiguration {
 
-		boolean customizerCalled;
+		@Bean
+		@SuppressWarnings("unchecked")
+		ContainerCustomizer<DirectMessageListenerContainer> customizer() {
+			return mock(ContainerCustomizer.class);
+		}
 
-		@RabbitListener(queues = "test", autoStartup = "false")
-		void listen(String in) {
 	}
 
-		@Bean
-		ContainerCustomizer<DirectMessageListenerContainer> customizer() {
-			return (container) -> this.customizerCalled = true;
+	static class TestListener {
+
+		@RabbitListener(queues = "test", autoStartup = "false")
+		void listen(String in) {
 		}
 
 	}