Merge pull request #27625 from garyrussell

* gh-27625:
  Polish "Apply container customizer bean to AMQP MessageListenerContainer"
  Apply container customizer bean to AMQP MessageListenerContainer

Closes gh-27625

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

@@ -19,10 +19,13 @@ package org.springframework.boot.autoconfigure.amqp;
 import java.util.stream.Collectors;
 
 import org.springframework.amqp.rabbit.annotation.EnableRabbit;
+import org.springframework.amqp.rabbit.config.ContainerCustomizer;
 import org.springframework.amqp.rabbit.config.DirectRabbitListenerContainerFactory;
 import org.springframework.amqp.rabbit.config.RabbitListenerConfigUtils;
 import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
 import org.springframework.amqp.rabbit.connection.ConnectionFactory;
+import org.springframework.amqp.rabbit.listener.DirectMessageListenerContainer;
+import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
 import org.springframework.amqp.rabbit.retry.MessageRecoverer;
 import org.springframework.amqp.support.converter.MessageConverter;
 import org.springframework.beans.factory.ObjectProvider;
@@ -76,9 +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);
+		simpleContainerCustomizer.ifUnique(factory::setContainerCustomizer);
 		return factory;
 	}
 
@@ -98,9 +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);
+		directContainerCustomizer.ifUnique(factory::setContainerCustomizer);
 		return factory;
 	}
 

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

@@ -37,7 +37,9 @@ import org.springframework.amqp.core.AcknowledgeMode;
 import org.springframework.amqp.core.AmqpAdmin;
 import org.springframework.amqp.core.Message;
 import org.springframework.amqp.rabbit.annotation.EnableRabbit;
+import org.springframework.amqp.rabbit.annotation.RabbitListener;
 import org.springframework.amqp.rabbit.config.AbstractRabbitListenerContainerFactory;
+import org.springframework.amqp.rabbit.config.ContainerCustomizer;
 import org.springframework.amqp.rabbit.config.DirectRabbitListenerContainerFactory;
 import org.springframework.amqp.rabbit.config.RabbitListenerConfigUtils;
 import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
@@ -49,7 +51,9 @@ import org.springframework.amqp.rabbit.connection.ConnectionNameStrategy;
 import org.springframework.amqp.rabbit.core.RabbitAdmin;
 import org.springframework.amqp.rabbit.core.RabbitMessagingTemplate;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.amqp.rabbit.listener.DirectMessageListenerContainer;
 import org.springframework.amqp.rabbit.listener.RabbitListenerContainerFactory;
+import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
 import org.springframework.amqp.rabbit.retry.MessageRecoverer;
 import org.springframework.amqp.support.converter.MessageConverter;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
@@ -60,6 +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;
@@ -74,6 +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;
@@ -849,6 +855,23 @@ class RabbitAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	@SuppressWarnings("unchecked")
+	void whenASimpleContainerCustomizerIsDefinedThenItIsCalledToConfigureTheContainer() {
+		this.contextRunner.withUserConfiguration(SimpleContainerCustomizerConfiguration.class)
+				.run((context) -> verify(context.getBean(ContainerCustomizer.class))
+						.configure(any(SimpleMessageListenerContainer.class)));
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void whenADirectContainerCustomizerIsDefinedThenItIsCalledToConfigureTheContainer() {
+		this.contextRunner.withUserConfiguration(DirectContainerCustomizerConfiguration.class)
+				.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) {
 		CachingConnectionFactory connectionFactory = context.getBean(CachingConnectionFactory.class);
 		return connectionFactory.getRabbitConnectionFactory();
@@ -1113,4 +1136,36 @@ class RabbitAutoConfigurationTests {
 
 	}
 
+	@Import(TestListener.class)
+	@Configuration(proxyBeanMethods = false)
+	static class SimpleContainerCustomizerConfiguration {
+
+		@Bean
+		@SuppressWarnings("unchecked")
+		ContainerCustomizer<SimpleMessageListenerContainer> customizer() {
+			return mock(ContainerCustomizer.class);
+		}
+
+	}
+
+	@Import(TestListener.class)
+	@Configuration(proxyBeanMethods = false)
+	static class DirectContainerCustomizerConfiguration {
+
+		@Bean
+		@SuppressWarnings("unchecked")
+		ContainerCustomizer<DirectMessageListenerContainer> customizer() {
+			return mock(ContainerCustomizer.class);
+		}
+
+	}
+
+	static class TestListener {
+
+		@RabbitListener(queues = "test", autoStartup = "false")
+		void listen(String in) {
+		}
+
+	}
+
 }