Don't eagerly initialize FactoryBeans

Fix `EmbeddedServletContainerAutoConfiguration` so that it does not
accidentally eagerly initialize factory beans.

Fixes gh-306

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/EmbeddedServletContainerAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2013 the original author or authors.
+ * Copyright 2012-2014 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.
@@ -24,7 +24,6 @@ import org.eclipse.jetty.util.Loader;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
-import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.RootBeanDefinition;
@@ -45,6 +44,7 @@ import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.util.ObjectUtils;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for an embedded servlet containers.
@@ -107,15 +107,17 @@ public class EmbeddedServletContainerAutoConfiguration {
 		@Override
 		public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
 				BeanDefinitionRegistry registry) {
-			if (this.beanFactory != null
-					&& this.beanFactory.getBeansOfType(
-							EmbeddedServletContainerCustomizerBeanPostProcessor.class)
-							.size() == 0) {
-				BeanDefinition beanDefinition = new RootBeanDefinition(
-						EmbeddedServletContainerCustomizerBeanPostProcessor.class);
+			if (this.beanFactory == null) {
+				return;
+			}
+			if (ObjectUtils.isEmpty(this.beanFactory.getBeanNamesForType(
+					EmbeddedServletContainerCustomizerBeanPostProcessor.class, true,
+					false))) {
 				registry.registerBeanDefinition(
 						"embeddedServletContainerCustomizerBeanPostProcessor",
-						beanDefinition);
+						new RootBeanDefinition(
+								EmbeddedServletContainerCustomizerBeanPostProcessor.class));
+
 			}
 		}
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationReproTests.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2012-2014 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure;
+
+import org.junit.After;
+import org.junit.Test;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests to reproduce reported issues.
+ * 
+ * @author Phillip Webb
+ */
+public class AutoConfigurationReproTests {
+
+	private ConfigurableApplicationContext context;
+
+	@After
+	public void cleanup() {
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void doesNotEarlyInitializeFactoryBeans() throws Exception {
+		SpringApplication application = new SpringApplication(EarlyInitConfig.class,
+				PropertySourcesPlaceholderConfigurer.class,
+				EmbeddedServletContainerAutoConfiguration.class);
+		this.context = application.run();
+		String bean = (String) this.context.getBean("earlyInit");
+		assertThat(bean, equalTo("bucket"));
+	}
+
+	@Configuration
+	public static class Config {
+	}
+
+	@Configuration
+	@ImportResource("classpath:/early-init-test.xml")
+	public static class EarlyInitConfig {
+
+	}
+}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/EarlyInitFactoryBean.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012-2014 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure;
+
+import org.springframework.beans.factory.FactoryBean;
+
+public class EarlyInitFactoryBean implements FactoryBean<String> {
+
+	private String propertyFromConfig;
+
+	public void setPropertyFromConfig(String propertyFromConfig) {
+		this.propertyFromConfig = propertyFromConfig;
+	}
+
+	@Override
+	public boolean isSingleton() {
+		return true;
+	}
+
+	@Override
+	public Class<?> getObjectType() {
+		return null;
+	}
+
+	@Override
+	public String getObject() throws Exception {
+		return this.propertyFromConfig;
+	}
+
+}

spring-boot-autoconfigure/src/test/resources/early-init-test.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
+
+	<bean id="earlyInit" class="org.springframework.boot.autoconfigure.EarlyInitFactoryBean" >
+		<property name="propertyFromConfig" value="${foo}" />
+	</bean>
+
+</beans>