Create a report based on Boot's autoconfiguration decisions

- Gather autoconfiguration conditional decisiions (true and false)
- Provide an actuator endpoint as one means to read the report
- Define @EnableAutConfigurationReport annotation to turn this feature on
- Tidy up autoconfig report a bit and log it if --debug=true

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointAutoConfiguration.java

@@ -22,6 +22,7 @@ import java.util.Properties;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.actuate.endpoint.AutoConfigurationReportEndpoint;
 import org.springframework.boot.actuate.endpoint.BeansEndpoint;
 import org.springframework.boot.actuate.endpoint.DumpEndpoint;
 import org.springframework.boot.actuate.endpoint.Endpoint;
@@ -41,7 +42,9 @@ import org.springframework.boot.actuate.trace.InMemoryTraceRepository;
 import org.springframework.boot.actuate.trace.TraceRepository;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.report.AutoConfigurationReport;
 import org.springframework.boot.bind.PropertiesConfigurationFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -54,9 +57,10 @@ import org.springframework.http.MediaType;
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for common management
  * {@link Endpoint}s.
- * 
+ *
  * @author Dave Syer
  * @author Phillip Webb
+ * @author Greg Turnquist
  */
 @Configuration
 @ConditionalOnClass(MediaType.class)
@@ -128,6 +132,13 @@ public class EndpointAutoConfiguration {
 		return new DumpEndpoint();
 	}
 
+	@Bean
+	@ConditionalOnBean(AutoConfigurationReport.class)
+	@ConditionalOnMissingBean
+	public AutoConfigurationReportEndpoint autoConfigurationAuditEndpoint() {
+		return new AutoConfigurationReportEndpoint();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public ShutdownEndpoint shutdownEndpoint() {
@@ -139,7 +150,6 @@ public class EndpointAutoConfiguration {
 
 		@Autowired
 		private ConfigurableEnvironment environment = new StandardEnvironment();
-
 		@Value("${spring.git.properties:classpath:git.properties}")
 		private Resource gitProperties;
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/ErrorMvcAutoConfiguration.java

@@ -32,6 +32,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.condition.Outcome;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
 import org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration.DefaultTemplateResolverConfiguration;
 import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/AutoConfigurationReportEndpoint.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012-2013 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.actuate.endpoint;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.report.AutoConfigurationReport;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * Endpoint to serve up autoconfiguration report if actuator is on the classpath.
+ *
+ * @author Greg Turnquist
+ */
+@ConfigurationProperties(name = "endpoints.autoconfigurationreport", ignoreUnknownFields = false)
+public class AutoConfigurationReportEndpoint extends AbstractEndpoint<AutoConfigurationReport> {
+
+	@Autowired
+	private AutoConfigurationReport autoConfigurationReport;
+
+	public AutoConfigurationReportEndpoint() {
+		super("/autoconfigurationreport");
+	}
+
+	@Override
+	public AutoConfigurationReport invoke() {
+		return this.autoConfigurationReport;
+	}
+
+}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointAutoConfigurationTests.java

@@ -18,8 +18,9 @@ package org.springframework.boot.actuate.autoconfigure;
 
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.boot.TestUtils;
-import org.springframework.boot.actuate.autoconfigure.EndpointAutoConfiguration;
+import org.springframework.boot.actuate.endpoint.AutoConfigurationReportEndpoint;
 import org.springframework.boot.actuate.endpoint.BeansEndpoint;
 import org.springframework.boot.actuate.endpoint.DumpEndpoint;
 import org.springframework.boot.actuate.endpoint.EnvironmentEndpoint;
@@ -28,6 +29,7 @@ import org.springframework.boot.actuate.endpoint.InfoEndpoint;
 import org.springframework.boot.actuate.endpoint.MetricsEndpoint;
 import org.springframework.boot.actuate.endpoint.ShutdownEndpoint;
 import org.springframework.boot.actuate.endpoint.TraceEndpoint;
+import org.springframework.boot.autoconfigure.report.AutoConfigurationReportCreator;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
 import static org.junit.Assert.assertEquals;
@@ -39,6 +41,7 @@ import static org.junit.Assert.assertNull;
  * 
  * @author Dave Syer
  * @author Phillip Webb
+ * @author Greg Turnquist
  */
 public class EndpointAutoConfigurationTests {
 
@@ -63,6 +66,20 @@ public class EndpointAutoConfigurationTests {
 		assertNotNull(this.context.getBean(TraceEndpoint.class));
 	}
 
+	@Test(expected = NoSuchBeanDefinitionException.class)
+	public void noAutoConfigurationAuditEndpointByDefault() {
+		this.context.getBean(AutoConfigurationReportEndpoint.class);
+	}
+
+	@Test
+	public void autoconfigurationAuditEndpoints() {
+		this.context = new AnnotationConfigApplicationContext();
+		this.context.register(EndpointAutoConfiguration.class, AutoConfigurationReportCreator.class);
+		this.context.refresh();
+		assertNotNull(this.context.getBean(AutoConfigurationReportEndpoint.class));
+	}
+
+
 	@Test
 	public void testInfoEndpointConfiguration() throws Exception {
 		this.context = new AnnotationConfigApplicationContext();

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/AutoConfigurationReportEndpointTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012-2013 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.actuate.endpoint;
+
+import org.springframework.boot.autoconfigure.report.EnableAutoConfigurationReport;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Tests for {@link AutoConfigurationReportEndpoint}.
+ *
+ * @author Greg Turnquist
+ */
+public class AutoConfigurationReportEndpointTests extends AbstractEndpointTests<AutoConfigurationReportEndpoint> {
+
+	public AutoConfigurationReportEndpointTests() {
+		super(Config.class, AutoConfigurationReportEndpoint.class,
+				"/autoconfigurationreport", true, "endpoints.autoconfigurationreport");
+	}
+
+	@Configuration
+	@EnableConfigurationProperties
+	@EnableAutoConfigurationReport
+	public static class Config {
+
+		@Bean
+		public AutoConfigurationReportEndpoint endpoint() {
+			return new AutoConfigurationReportEndpoint();
+		}
+
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/Outcome.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2013 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.condition;
+
+/**
+ * Outcome for a match, including log message.
+ */
+public class Outcome {
+
+	private final boolean match;
+	private final String message;
+
+	public Outcome(boolean match, String message) {
+		this.match = match;
+		this.message = message;
+	}
+
+	public static Outcome match() {
+		return match(null);
+	}
+
+	public static Outcome match(String message) {
+		return new Outcome(true, message);
+	}
+
+	public static Outcome noMatch(String message) {
+		return new Outcome(false, message);
+	}
+
+	public boolean isMatch() {
+		return this.match;
+	}
+
+	public String getMessage() {
+		return this.message;
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/SpringBootCondition.java

@@ -18,6 +18,7 @@ package org.springframework.boot.autoconfigure.condition;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.springframework.boot.autoconfigure.report.AutoConfigurationReport;
 import org.springframework.context.annotation.Condition;
 import org.springframework.context.annotation.ConditionContext;
 import org.springframework.core.type.AnnotatedTypeMetadata;
@@ -31,6 +32,7 @@ import org.springframework.util.StringUtils;
  * logging to help the user diagnose what classes are loaded.
  * 
  * @author Phillip Webb
+ * @author Greg Turnquist
  */
 public abstract class SpringBootCondition implements Condition {
 
@@ -39,18 +41,22 @@ public abstract class SpringBootCondition implements Condition {
 	@Override
 	public final boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
 		Outcome result = getMatchOutcome(context, metadata);
+		StringBuilder message = getMessage(metadata, result);
+
 		if (!result.isMatch()) {
 			// Log non-matching conditions at debug
 			if (this.logger.isDebugEnabled()) {
-				this.logger.debug(getMessage(metadata, result));
+				this.logger.debug(message);
 			}
+			AutoConfigurationReport.registerDecision(context, message.toString(), getClassOrMethodName(metadata), result);
 			return false;
 		}
 
 		// Log matching conditions at trace
 		if (this.logger.isTraceEnabled()) {
-			this.logger.trace(getMessage(metadata, result));
+			this.logger.trace(message);
 		}
+		AutoConfigurationReport.registerDecision(context, message.toString(), getClassOrMethodName(metadata), result);
 		return true;
 	}
 
@@ -59,16 +65,7 @@ public abstract class SpringBootCondition implements Condition {
 		message.append("Condition ");
 		message.append(ClassUtils.getShortName(getClass()));
 		message.append(" on ");
-		if (metadata instanceof ClassMetadata) {
-			ClassMetadata classMetadata = (ClassMetadata) metadata;
-			message.append(classMetadata.getClassName());
-		}
-		else if (metadata instanceof MethodMetadata) {
-			MethodMetadata methodMetadata = (MethodMetadata) metadata;
-			message.append(methodMetadata.getDeclaringClassName());
-			message.append("#");
-			message.append(methodMetadata.getMethodName());
-		}
+		message.append(getClassOrMethodName(metadata));
 		message.append(result.isMatch() ? " matched" : " did not match");
 		if (StringUtils.hasLength(result.getMessage())) {
 			message.append(" due to ");
@@ -77,6 +74,20 @@ public abstract class SpringBootCondition implements Condition {
 		return message;
 	}
 
+	private String getClassOrMethodName(AnnotatedTypeMetadata metadata) {
+		if (metadata instanceof ClassMetadata) {
+			ClassMetadata classMetadata = (ClassMetadata) metadata;
+			return classMetadata.getClassName();
+		}
+		else if (metadata instanceof MethodMetadata) {
+			MethodMetadata methodMetadata = (MethodMetadata) metadata;
+			return methodMetadata.getDeclaringClassName() + "#" + methodMetadata.getMethodName();
+		}
+		else {
+			return "";
+		}
+	}
+
 	/**
 	 * Determine the outcome of the match along with suitable log output.
 	 */
@@ -102,39 +113,4 @@ public abstract class SpringBootCondition implements Condition {
 		return condition.matches(context, metadata);
 	}
 
-	/**
-	 * Outcome for a match, including log message.
-	 */
-	protected final static class Outcome {
-
-		private final boolean match;
-
-		private final String message;
-
-		public Outcome(boolean match, String message) {
-			this.match = match;
-			this.message = message;
-		}
-
-		public boolean isMatch() {
-			return this.match;
-		}
-
-		public String getMessage() {
-			return this.message;
-		}
-
-		public static Outcome match() {
-			return match(null);
-		}
-
-		public static Outcome match(String message) {
-			return new Outcome(true, message);
-		}
-
-		public static Outcome noMatch(String message) {
-			return new Outcome(false, message);
-		}
-
-	}
 }

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration.java

@@ -33,6 +33,7 @@ import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.Outcome;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
 import org.springframework.boot.bind.RelaxedPropertyResolver;
 import org.springframework.context.ApplicationContext;

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/report/AutoConfigurationDecision.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2012-2013 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.report;
+
+import org.springframework.boot.autoconfigure.condition.Outcome;
+
+/**
+ * Collects details about decision made during autoconfiguration (pass or fail)
+ *
+ * @author Greg Turnquist
+ */
+public class AutoConfigurationDecision {
+	private final String message;
+	private final String classOrMethodName;
+	private final Outcome outcome;
+
+	public AutoConfigurationDecision(String message, String classOrMethodName, Outcome outcome) {
+		this.message = message;
+		this.classOrMethodName = classOrMethodName;
+		this.outcome = outcome;
+	}
+
+	public String getMessage() {
+		return message;
+	}
+
+	public String getClassOrMethodName() {
+		return classOrMethodName;
+	}
+
+	public Outcome getOutcome() {
+		return outcome;
+	}
+
+	@Override
+	public String toString() {
+		return "AutoConfigurationDecision{" + "message='" + message + '\''
+				+ ", classOrMethodName='" + classOrMethodName + '\'' + ", outcome="
+				+ outcome + '}';
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+
+		AutoConfigurationDecision decision = (AutoConfigurationDecision) o;
+
+		if (message != null ? !message.equals(decision.message)
+				: decision.message != null)
+			return false;
+		if (outcome != null ? !outcome.equals(decision.outcome)
+				: decision.outcome != null)
+			return false;
+
+		return true;
+	}
+
+	@Override
+	public int hashCode() {
+		int result = message != null ? message.hashCode() : 0;
+		result = 31 * result + (outcome != null ? outcome.hashCode() : 0);
+		return result;
+	}
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/report/AutoConfigurationReport.java

@@ -0,0 +1,202 @@
+/*
+ * Copyright 2012-2013 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.report;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.BeansException;
+import org.springframework.boot.autoconfigure.condition.Outcome;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.context.event.ContextRefreshedEvent;
+
+/**
+ * Bean used to gather autoconfiguration decisions, and then generate a collection of info
+ * for beans that were created as well as situations where the conditional outcome was
+ * negative.
+ * 
+ * @author Greg Turnquist
+ * @author Dave Syer
+ */
+public class AutoConfigurationReport implements ApplicationContextAware,
+		ApplicationListener<ContextRefreshedEvent> {
+
+	private static Log logger = LogFactory.getLog(AutoConfigurationReport.class);
+
+	private Set<CreatedBeanInfo> beansCreated = new LinkedHashSet<CreatedBeanInfo>();
+	private Map<String, List<AutoConfigurationDecision>> autoconfigurationDecisions = new LinkedHashMap<String, List<AutoConfigurationDecision>>();
+	private Map<String, List<String>> positive = new LinkedHashMap<String, List<String>>();
+	private Map<String, List<String>> negative = new LinkedHashMap<String, List<String>>();
+	private ApplicationContext context;
+	private boolean initialized = false;
+
+	public static void registerDecision(ConditionContext context, String message,
+			String classOrMethodName, Outcome outcome) {
+		if (context.getBeanFactory().containsBeanDefinition("autoConfigurationReport")) {
+			AutoConfigurationReport autoconfigurationReport = context.getBeanFactory()
+					.getBean(AutoConfigurationReport.class);
+			autoconfigurationReport.registerDecision(message, classOrMethodName, outcome);
+		}
+	}
+
+	private void registerDecision(String message, String classOrMethodName,
+			Outcome outcome) {
+		AutoConfigurationDecision decision = new AutoConfigurationDecision(message,
+				classOrMethodName, outcome);
+		if (!this.autoconfigurationDecisions.containsKey(classOrMethodName)) {
+			this.autoconfigurationDecisions.put(classOrMethodName,
+					new ArrayList<AutoConfigurationDecision>());
+		}
+		this.autoconfigurationDecisions.get(classOrMethodName).add(decision);
+	}
+
+	public Set<CreatedBeanInfo> getBeansCreated() {
+		return this.beansCreated;
+	}
+
+	public Map<String, List<String>> getNegativeDecisions() {
+		return this.negative;
+	}
+
+	public Set<Class<?>> getBeanTypesCreated() {
+		Set<Class<?>> beanTypesCreated = new HashSet<Class<?>>();
+		for (CreatedBeanInfo bootCreatedBeanInfo : this.getBeansCreated()) {
+			beanTypesCreated.add(bootCreatedBeanInfo.getBeanType());
+		}
+		return beanTypesCreated;
+	}
+
+	public Set<String> getBeanNamesCreated() {
+		Set<String> beanNamesCreated = new HashSet<String>();
+		for (CreatedBeanInfo bootCreatedBeanInfo : this.getBeansCreated()) {
+			beanNamesCreated.add(bootCreatedBeanInfo.getName());
+		}
+		return beanNamesCreated;
+	}
+
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext)
+			throws BeansException {
+		this.context = applicationContext;
+	}
+
+	@Override
+	public void onApplicationEvent(ContextRefreshedEvent event) {
+		initialize();
+	}
+
+	public void initialize() {
+		if (!this.initialized) {
+			synchronized (this) {
+				if (!this.initialized) {
+					this.initialized = true;
+					splitDecisionsIntoPositiveAndNegative();
+					scanPositiveDecisionsForBeansBootCreated();
+					if (this.context.getEnvironment().getProperty("debug", Boolean.class,
+							false)) {
+						logger.info("Created beans:");
+						for (CreatedBeanInfo info : this.beansCreated) {
+							logger.info(info);
+						}
+						logger.info("Negative decisions:");
+						for (String key : this.negative.keySet()) {
+							logger.info(key + ": " + this.negative.get(key));
+						}
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Scan the list of {@link AutoConfigurationDecision}'s, and if all outcomes true,
+	 * then put it on the positive list. Otherwise, put it on the negative list.
+	 */
+	private synchronized void splitDecisionsIntoPositiveAndNegative() {
+		for (String key : this.autoconfigurationDecisions.keySet()) {
+			boolean match = true;
+			for (AutoConfigurationDecision decision : this.autoconfigurationDecisions
+					.get(key)) {
+				if (!decision.getOutcome().isMatch()) {
+					match = false;
+				}
+			}
+			if (match) {
+				if (!this.positive.containsKey(key)) {
+					this.positive.put(key, new ArrayList<String>());
+				}
+				for (AutoConfigurationDecision decision : this.autoconfigurationDecisions
+						.get(key)) {
+					this.positive.get(key).add(decision.getMessage());
+				}
+			}
+			else {
+				if (!this.negative.containsKey(key)) {
+					this.negative.put(key, new ArrayList<String>());
+				}
+				for (AutoConfigurationDecision decision : this.autoconfigurationDecisions
+						.get(key)) {
+					this.negative.get(key).add(decision.getMessage());
+				}
+			}
+		}
+	}
+
+	/**
+	 * Scan all the decisions based on successful outcome, and try to find the
+	 * corresponding beans Boot created.
+	 */
+	private synchronized void scanPositiveDecisionsForBeansBootCreated() {
+		for (String key : this.positive.keySet()) {
+			for (AutoConfigurationDecision decision : this.autoconfigurationDecisions
+					.get(key)) {
+				for (String beanName : this.context.getBeanDefinitionNames()) {
+					Object bean = this.context.getBean(beanName);
+					if (decision.getMessage().contains(beanName)
+							&& decision.getMessage().contains("matched")) {
+						boolean anyMethodsAreBeans = false;
+						for (Method method : bean.getClass().getMethods()) {
+							if (this.context.containsBean(method.getName())) {
+								this.beansCreated.add(new CreatedBeanInfo(method
+										.getName(), method.getReturnType(), this.positive
+										.get(key)));
+								anyMethodsAreBeans = true;
+							}
+						}
+
+						if (!anyMethodsAreBeans) {
+							this.beansCreated.add(new CreatedBeanInfo(beanName, bean,
+									this.positive.get(key)));
+						}
+					}
+				}
+			}
+		}
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/report/BootCreatedBeanInfo.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2012-2013 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.report;
+
+import java.util.List;
+
+/**
+ * A collection of data about a bean created by Boot
+ *
+ * @author Greg Turnquist
+ */
+public class BootCreatedBeanInfo {
+
+	private final String beanName;
+	private final Class<?> beanType;
+	private final List<String> decisions;
+
+	public BootCreatedBeanInfo(String beanName, Object bean, List<String> decisions) {
+		this.beanName = beanName;
+		this.beanType = bean.getClass();
+		this.decisions = decisions;
+	}
+
+	public BootCreatedBeanInfo(String beanName, Class<?> declaredBeanType, List<String> decisions) {
+		this.beanName = beanName;
+		this.beanType = declaredBeanType;
+		this.decisions = decisions;
+	}
+
+	@Override
+	public String toString() {
+		return "BootCreatedBeanInfo{" + "beanName='" + beanName + '\'' + ", beanType=" + beanType
+				+ ", decisions=" + decisions + '}';
+	}
+
+	public String getBeanName() {
+		return beanName;
+	}
+
+	public Class<?> getBeanType() {
+		return beanType;
+	}
+
+	public List<String> getDecisions() {
+		return decisions;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+
+		BootCreatedBeanInfo bootCreatedBeanInfo = (BootCreatedBeanInfo) o;
+
+		if (beanName != null ? !beanName.equals(bootCreatedBeanInfo.beanName)
+				: bootCreatedBeanInfo.beanName != null)
+			return false;
+
+		return true;
+	}
+
+	@Override
+	public int hashCode() {
+		return beanName != null ? beanName.hashCode() : 0;
+	}
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/report/CreatedBeanInfo.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2013 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.report;
+
+import java.util.List;
+
+/**
+ * A collection of data about a bean created by Boot
+ * 
+ * @author Greg Turnquist
+ */
+public class CreatedBeanInfo {
+
+	private final String name;
+	private final Class<?> type;
+	private final List<String> decisions;
+
+	public CreatedBeanInfo(String beanName, Object bean, List<String> decisions) {
+		this.name = beanName;
+		this.type = bean.getClass();
+		this.decisions = decisions;
+	}
+
+	public CreatedBeanInfo(String beanName, Class<?> declaredBeanType,
+			List<String> decisions) {
+		this.name = beanName;
+		this.type = declaredBeanType;
+		this.decisions = decisions;
+	}
+
+	@Override
+	public String toString() {
+		return "{" + "name='" + this.name + '\'' + ", type=" + this.type + ", decisions="
+				+ this.decisions + '}';
+	}
+
+	public String getName() {
+		return this.name;
+	}
+
+	public Class<?> getBeanType() {
+		return this.type;
+	}
+
+	public List<String> getDecisions() {
+		return this.decisions;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+
+		CreatedBeanInfo bootCreatedBeanInfo = (CreatedBeanInfo) o;
+
+		if (this.name != null ? !this.name.equals(bootCreatedBeanInfo.name)
+				: bootCreatedBeanInfo.name != null)
+			return false;
+
+		return true;
+	}
+
+	@Override
+	public int hashCode() {
+		return this.name != null ? this.name.hashCode() : 0;
+	}
+}

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

@@ -24,6 +24,7 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.condition.Outcome;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
 import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
 import org.springframework.context.annotation.Bean;

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

@@ -0,0 +1,188 @@
+/*
+ * Copyright 2012-2013 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.junit.Test;
+import org.springframework.amqp.rabbit.connection.ConnectionFactory;
+import org.springframework.amqp.rabbit.core.RabbitAdmin;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration;
+import org.springframework.boot.autoconfigure.jms.JmsTemplateAutoConfiguration;
+import org.springframework.boot.autoconfigure.report.AutoConfigurationReport;
+import org.springframework.boot.autoconfigure.report.CreatedBeanInfo;
+import org.springframework.boot.autoconfigure.report.EnableAutoConfigurationReport;
+import org.springframework.boot.autoconfigure.web.MultipartAutoConfiguration;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+import org.springframework.jms.core.JmsTemplate;
+
+/**
+ * Tests for {@link AutoConfigurationReport}.
+ *
+ * @author Greg Turnquist
+ */
+public class AutoConfigurationReportTests {
+
+	private AnnotationConfigApplicationContext context;
+
+	@Test
+	public void simpleReportTestCase() {
+		this.context = new AnnotationConfigApplicationContext();
+		this.context.register(TestConfiguration.class,
+				PropertyPlaceholderAutoConfiguration.class);
+		this.context.refresh();
+		AutoConfigurationReport autoconfigSettings = this.context
+				.getBean(AutoConfigurationReport.class);
+
+		Set<CreatedBeanInfo> beansBootCreated = autoconfigSettings.getBeansCreated();
+		Set<String> beanNamesBootCreated = autoconfigSettings.getBeanNamesCreated();
+		Set<Class<?>> beanTypesBootCreated = autoconfigSettings.getBeanTypesCreated();
+
+		assertEquals(1, beansBootCreated.size());
+		assertEquals(1, beanNamesBootCreated.size());
+		assertEquals(1, beanTypesBootCreated.size());
+
+		assertTrue(beanNamesBootCreated.contains("propertySourcesPlaceholderConfigurer"));
+		assertTrue(beanTypesBootCreated
+				.contains(PropertySourcesPlaceholderConfigurer.class));
+
+		boolean foundPropertySourcesPlaceHolderConfigurer = false;
+		int totalDecisions = 0;
+		for (CreatedBeanInfo item : beansBootCreated) {
+			for (String decision : item.getDecisions()) {
+				totalDecisions += 1;
+				if (decision.contains("propertySourcesPlaceholderConfigurer matched")) {
+					foundPropertySourcesPlaceHolderConfigurer = true;
+				}
+			}
+		}
+		assertEquals(1, totalDecisions);
+		assertTrue(foundPropertySourcesPlaceHolderConfigurer);
+	}
+
+	@Test
+	public void rabbitReportTest() {
+		this.context = new AnnotationConfigApplicationContext();
+		this.context.register(TestConfiguration.class, RabbitAutoConfiguration.class);
+		this.context.refresh();
+		AutoConfigurationReport autoconfigSettings = this.context
+				.getBean(AutoConfigurationReport.class);
+
+		Set<CreatedBeanInfo> beansBootCreated = autoconfigSettings.getBeansCreated();
+		Set<String> beanNamesBootCreated = autoconfigSettings.getBeanNamesCreated();
+		Set<Class<?>> beanTypesBootCreated = autoconfigSettings.getBeanTypesCreated();
+
+		assertEquals(3, beansBootCreated.size());
+		assertEquals(3, beanNamesBootCreated.size());
+		assertEquals(3, beanTypesBootCreated.size());
+
+		assertTrue(beanNamesBootCreated.contains("amqpAdmin"));
+		assertTrue(beanNamesBootCreated.contains("rabbitConnectionFactory"));
+		assertTrue(beanNamesBootCreated.contains("rabbitTemplate"));
+
+		assertTrue(beanTypesBootCreated.contains(RabbitAdmin.class));
+		assertTrue(beanTypesBootCreated.contains(ConnectionFactory.class));
+		assertTrue(beanTypesBootCreated.contains(RabbitTemplate.class));
+
+		boolean foundRabbitConnectionFactory = false;
+		boolean foundAmqpAdminExpressionCondition = false;
+		boolean foundAmqpAdminBeanCondition = false;
+		boolean foundRabbitTemplateCondition = false;
+		int totalDecisions = 0;
+		for (CreatedBeanInfo item : beansBootCreated) {
+			for (String decision : item.getDecisions()) {
+				totalDecisions += 1;
+				if (decision.contains("RabbitConnectionFactoryCreator matched")) {
+					foundRabbitConnectionFactory = true;
+				} else if (decision.contains("OnExpressionCondition")
+						&& decision.contains("amqpAdmin matched due to SpEL expression")) {
+					foundAmqpAdminExpressionCondition = true;
+				} else if (decision.contains("OnBeanCondition")
+						&& decision.contains("amqpAdmin matched")) {
+					foundAmqpAdminBeanCondition = true;
+				} else if (decision.contains("rabbitTemplate matched")) {
+					foundRabbitTemplateCondition = true;
+				}
+			}
+		}
+		assertEquals(4, totalDecisions);
+		assertTrue(foundRabbitConnectionFactory);
+		assertTrue(foundAmqpAdminExpressionCondition);
+		assertTrue(foundAmqpAdminBeanCondition);
+		assertTrue(foundRabbitTemplateCondition);
+	}
+
+	@Test
+	public void verifyItGathersNegativeMatches() {
+		this.context = new AnnotationConfigApplicationContext();
+		this.context.register(TestConfiguration2.class,
+				JmsTemplateAutoConfiguration.class, MultipartAutoConfiguration.class);
+		this.context.refresh();
+		AutoConfigurationReport autoconfigSettings = this.context
+				.getBean(AutoConfigurationReport.class);
+
+		Map<String, List<String>> negatives = autoconfigSettings.getNegativeDecisions();
+
+		boolean foundMyOwnJmsTemplateAndBackedOff = false;
+		boolean didNotFindMultipartConfigElement = false;
+		int totalNegativeDecisions = 0;
+		for (String key : negatives.keySet()) {
+			for (String decision : negatives.get(key)) {
+				totalNegativeDecisions += 1;
+				if (decision
+						.contains("JmsTemplateAutoConfiguration#jmsTemplate did not match")
+						&& decision.contains("found the following [myOwnJmsTemplate]")) {
+					foundMyOwnJmsTemplateAndBackedOff = true;
+				} else if (decision.contains("MultipartAutoConfiguration did not match")
+						&& decision
+								.contains("list['javax.servlet.MultipartConfigElement']")
+						&& decision.contains("found no beans")) {
+					didNotFindMultipartConfigElement = true;
+				}
+			}
+		}
+		// varying situations might cause multi-conditional beans to evaluate in different orders
+		assertTrue(totalNegativeDecisions >= 2);
+		assertTrue(foundMyOwnJmsTemplateAndBackedOff);
+		assertTrue(didNotFindMultipartConfigElement);
+
+	}
+
+	@Configuration
+	@EnableAutoConfigurationReport
+	public static class TestConfiguration {
+	}
+
+	@Configuration
+	@EnableAutoConfigurationReport
+	public static class TestConfiguration2 {
+		@Bean
+		JmsTemplate myOwnJmsTemplate(javax.jms.ConnectionFactory connectionFactory) {
+			return new JmsTemplate(connectionFactory);
+		}
+	}
+
+}

spring-boot-samples/spring-boot-sample-secure/src/main/java/org/springframework/boot/sample/ops/ui/SampleSecureApplication.java

@@ -20,6 +20,7 @@ import java.util.Date;
 import java.util.Map;
 
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.report.EnableAutoConfigurationReport;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
@@ -33,6 +34,7 @@ import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
 
 @EnableAutoConfiguration
+@EnableAutoConfigurationReport
 @ComponentScan
 @Controller
 public class SampleSecureApplication extends WebMvcConfigurerAdapter {

spring-boot-samples/spring-boot-sample-secure/src/main/resources/application.properties

@@ -1 +1,2 @@
-spring.thymeleaf.cache: false
+spring.thymeleaf.cache: false
+debug: true