ApplicationListeners will get detected lazily as well (e.g. on @Bean's...

ApplicationListeners will get detected lazily as well (e.g. on @Bean's concrete result); inner bean ApplicationListeners will be invoked through their proxy (if any)

org.springframework.context/src/main/java/org/springframework/context/support/ApplicationContextAwareProcessor.java

 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -73,12 +73,12 @@ class ApplicationContextAwareProcessor implements MergedBeanDefinitionPostProces
 
 
 	public void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition, Class beanType, String beanName) {
-		if (!this.applicationContext.containsBean(beanName) && beanDefinition.isSingleton()) {
+		if (beanDefinition.isSingleton()) {
 			this.singletonNames.put(beanName, Boolean.TRUE);
 		}
 	}
 
-	public Object postProcessBeforeInitialization(final Object bean, final String beanName) throws BeansException {
+	public Object postProcessBeforeInitialization(final Object bean, String beanName) throws BeansException {
 		AccessControlContext acc = null;
 
 		if (System.getSecurityManager() != null &&
@@ -90,19 +90,19 @@ class ApplicationContextAwareProcessor implements MergedBeanDefinitionPostProces
 		if (acc != null) {
 			AccessController.doPrivileged(new PrivilegedAction<Object>() {
 				public Object run() {
-					doProcess(bean, beanName);
+					invokeAwareInterfaces(bean);
 					return null;
 				}
 			}, acc);
 		}
 		else {
-			doProcess(bean, beanName);
+			invokeAwareInterfaces(bean);
 		}
 		
 		return bean;
 	}
 	
-	private void doProcess(Object bean, String beanName) {
+	private void invokeAwareInterfaces(Object bean) {
 		if (bean instanceof ResourceLoaderAware) {
 			((ResourceLoaderAware) bean).setResourceLoader(this.applicationContext);
 		}
@@ -115,30 +115,27 @@ class ApplicationContextAwareProcessor implements MergedBeanDefinitionPostProces
 		if (bean instanceof ApplicationContextAware) {
 			((ApplicationContextAware) bean).setApplicationContext(this.applicationContext);
 		}
+	}
 
+	public Object postProcessAfterInitialization(Object bean, String beanName) {
 		if (bean instanceof ApplicationListener) {
-			if (!this.applicationContext.containsBean(beanName)) {
-				// not a top-level bean - not detected as a listener by getBeanNamesForType retrieval
-				Boolean flag = this.singletonNames.get(beanName);
-				if (Boolean.TRUE.equals(flag)) {
-					// inner singleton bean: register on the fly
-					this.applicationContext.addApplicationListener((ApplicationListener) bean);
-				}
-				else if (flag == null) {
+			// potentially not detected as a listener by getBeanNamesForType retrieval
+			Boolean flag = this.singletonNames.get(beanName);
+			if (Boolean.TRUE.equals(flag)) {
+				// singleton bean (top-level or inner): register on the fly
+				this.applicationContext.addApplicationListener((ApplicationListener) bean);
+			}
+			else if (flag == null) {
+				if (logger.isWarnEnabled() && !this.applicationContext.containsBean(beanName)) {
 					// inner bean with other scope - can't reliably process events
-					if (logger.isWarnEnabled()) {
-						logger.warn("Inner bean '" + beanName + "' implements ApplicationListener interface " +
-								"but is not reachable for event multicasting by its containing ApplicationContext " +
-								"because it does not have singleton scope. Only top-level listener beans are allowed " +
-								"to be of non-singleton scope.");
-					}
-					this.singletonNames.put(beanName, Boolean.FALSE);
+					logger.warn("Inner bean '" + beanName + "' implements ApplicationListener interface " +
+							"but is not reachable for event multicasting by its containing ApplicationContext " +
+							"because it does not have singleton scope. Only top-level listener beans are allowed " +
+							"to be of non-singleton scope.");
 				}
+				this.singletonNames.put(beanName, Boolean.FALSE);
 			}
 		}
-	}
-
-	public Object postProcessAfterInitialization(Object bean, String name) {
 		return bean;
 	}
 

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/ConfigurationClassProcessingTests.java

@@ -32,12 +32,14 @@ import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.parsing.BeanDefinitionParsingException;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.context.ApplicationListener;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ConfigurationClassPostProcessor;
 import org.springframework.context.annotation.Scope;
+import org.springframework.context.event.ContextRefreshedEvent;
 import org.springframework.context.support.GenericApplicationContext;
 
 /**
@@ -45,6 +47,7 @@ import org.springframework.context.support.GenericApplicationContext;
  * handling within {@link Configuration} class definitions.
  *
  * @author Chris Beams
+ * @author Juergen Hoeller
  */
 public class ConfigurationClassProcessingTests {
 
@@ -139,6 +142,9 @@ public class ConfigurationClassProcessingTests {
 		assertEquals("foo-processed", foo.getName());
 		assertEquals("bar-processed", bar.getName());
 		assertEquals("baz-processed", baz.getName());
+
+		SpousyTestBean listener = factory.getBean("listenerTestBean", SpousyTestBean.class);
+		assertTrue(listener.refreshed);
 	}
 
 
@@ -232,10 +238,17 @@ public class ConfigurationClassProcessingTests {
 				}
 			};
 		}
+
+		@Bean
+		public ITestBean listenerTestBean() {
+			return new SpousyTestBean("listener");
+		}
 	}
 
 
-	private static class SpousyTestBean extends TestBean {
+	private static class SpousyTestBean extends TestBean implements ApplicationListener<ContextRefreshedEvent> {
+
+		public boolean refreshed = false;
 
 		public SpousyTestBean(String name) {
 			super(name);
@@ -246,6 +259,10 @@ public class ConfigurationClassProcessingTests {
 		public void setSpouse(ITestBean spouse) {
 			super.setSpouse(spouse);
 		}
+
+		public void onApplicationEvent(ContextRefreshedEvent event) {
+			this.refreshed = true;
+		}
 	}
 
 }